MRC Bearing Solutions for the Hydrocarbon Processing Industry M230-710 February 1996
Table of Contents Selection of the Proper Bearing Solution.................... 1 Relative Bearing Performance Characteristics................ 2 Preload/Clearance...................................... 4 Handling and Maintenance............................... 5 S-Type Radial Bearings.................................. 6 5000 Series Double Row Angular Contact Ball Bearings.............................. 10 7000 Series DU Type 29 Degree Angular Contact Ball Bearings.............................. 14 PumPac 000 Series 40/ Degree Angular Contact Ball Bearings.............................. PumPac 000AAB Series 40/ Degree Angular Contact Ball Bearings.............................. 19 PumPac Diamond 000 Series Angular Contact Ball Bearings.............................. 22 7000 Series PJD 40 Degree Angular Contact Ball Bearings Ball Centered Cage................................ 24 7000 Series PDU 40 Degree Angular Contact Ball Bearings Land Guided Cage................................. 2 97000U2 29 Degree and 97000UP2 40 Degree Angular Contact Split Inner Ring Sets............................... 30 Notes............................................... 32
Bearings for Centrifugal Pumps; Selection of the Proper Bearing Solution The most common cause of pump bearing failure is not fatigue. Thrust bearings for centrifugal pumps seldom achieve the theoretical life specified by API and ANSI standards. This is because pump bearings usually fail from causes other than fatigue. Causes include: Contamination Overheating Cage Damage Inadequate Lubrication Ball Skidding Users tend to ignore the fact that bearings are designed for specific operating conditions and use the same bearing for most pump applications. Consequently, the 40 degree angular contact bearing is applied in applications where it may not be the best choice. High contact angle vs. low contact angle. Bearings with low contact angles are designed primarily for radial loads. Bearings with high contact angles are most suitable for thrust (axial) loads. Neither bearing does both well and compromises are often required to achieve acceptable bearing performance. Pump applications are not consistent and loads may vary from high thrust to near zero thrust to thrust in the opposite direction. High contact angle bearings require substantial thrust load to overcome the centrifugal and gyroscopic forces on the ball, to prevent ball skidding. The higher the contact angle, the more thrust load is required. Low contact angle bearings require little or no thrust load to prevent ball skidding. It is important not to forget that only one bearing in a set, mounted back-to-back or face-to-face is thrust loaded. The unloaded bearing has the same minimum thrust load requirement as the loaded bearing, and axial preload must be applied to the set to be sure that both bearings have adequate thrust loads to overcome the centrifugal and gyroscopic forces. Assuring minimum required thrust load. Operating preload plus the external thrust on the primary bearing is additive and the load may be high enough to cause unacceptably high operating temperatures. In this publication, the minimum required thrust load for all bearings is listed. To select the proper bearing, the external loads, temperatures, shaft fits and speed must be considered. Only with this information can an optimum bearing solution be selected. If the above conditions cannot be determined, reasonable assumptions must be made to make the initial bearing selection. Reasonable assumptions are: Open impellers develop relatively high thrust load, usually toward the intake Closed impellers usually have low thrust loads Double suction pumps usually have little or no thrust load Thrust loads in a direction opposite the intake are usually low These assumptions should be used only as a guide for tentative bearing selection. Once the bearings have operated, the loads can be more accurately determined by observing the location and width of the ball path on the raceways. MRC offers the widest selection of bearings for pumps in the bearing industry. A solution exists for nearly every combination of loads and speeds. Start the selection process by referring to pages two and three. The information on these pages will guide you to the proper bearings. Call MRC Bearing Services at 1-00-MRC-7000 for additional information regarding bearing selection. 1
MRC Solutions Bearing Type Cage Contact Angle Performance Level Characteristic Radial Stiffness Axial Stiffness Speed Radial Capacity Thrust Capacity S-Type Single Row Deep Groove twopiece steel Radial Type Extremely High Very High High Moderate 5000 Series Double Row onepiece steel 30 Extremely High Very High High Moderate 7000 Series Duplex ballguided twopiece steel 29 Extremely High Very High High Moderate 000 Series PumPac Bearing Set landguided one-piece machined brass 40 / Extremely High Very High High Moderate 000 AAB Series PumPac Bearing Set landguided one-piece machined brass 40 / Extremely High Very High High Moderate 000 BB Series PumPac Diamond Bearing Set landguided one-piece machined brass / Extremely High Very High High Moderate 7000P & 7000PJ Duplex ballguided one-piece machine or stampedbrass 40 Extremely High Very High High Moderate 97000U2 Duplex Tandem Pair Radial & Axial Looseness in Bearing System landguided one-piece machined brass 29 Extremely High Very High High Moderate 97000UP2 Duplex Tandem Pair Radial & Axial Looseness in Bearing System landguided one-piece machined brass 40 Extremely High Very High High Moderate 2
Applications For Details Steady rest positions to accommodate radial load in centrifugal pumps. Most electric motors use this bearing to accommodate radial loads. Seldom used as a primary thrust bearing in centrifugal pumps. See Page 6-9 Most often used in ANSI pumps with moderate thrust loads. 5000 series bearings can also be used in the radial position when the radial load is excessive for SRDG 200S and 300S series. See Page 10- For high speed centrifugal pumps. This bearing can run at higher speeds than the 7000P series and requires less thrust load to maintain proper traction forces between the ball and raceway surfaces. See Page 14- For centrifugal pumps with heavy thrust loads that are not reversing or reverse only momentarily. Very effective as a thrust bearing in high speed pumps when direction of thrust is known. Forgiving in an application when thrust loads and temperatures are not determined. See Page -1 For pumps involving very heavy primary thrust loads consisting of a PumPac triplex set with two 40 degree bearings in tandem matched back-to-back with one degree bearing. See Page 19-21 Balanced pumps, operating with light or no thrust loads at high speeds. Example: Double suction impeller pumps between bearing applications. Pumps with closed impellers, balance holes and pump-out vanes that result in light thrust loads. See Page 22-23 For moderate speed centrifugal pumps, used as thrust bearings where high thrust loads are expected. Temperatures, loads and shaft fits should be known to establish proper preload or clearance. See Page 24-29 For vertical or other pumps when endplay is not a major concern. This bearing type will be specified for speeds higher than those accommodated by the 97000UP series. This product is often used in ethylene stirrer motor applications. See Page 30-31 For vertical pumps, other types of pumps and electric motor applications. For use where extremely high thrust load is possible. Often used in ethylene reactors as well as deep water pumps. See Page 30-31 3
MRC Bearing Services 1-00-MRC-7000 Why a Preload or Clearance? Angular contact bearings need a minimum required thrust load to keep the balls tracking at the designed contact angle. With less than the minimum required thrust load, centrifugal force will cause the balls to track at different contact angles on the outer ring and inner ring raceways. The thrust load is assured by providing an adequate operating preload. Operating preload is dependent upon: Manufactured preload/clearance Shaft and housing interference fit Temperature differential between the inner and outer rings Angular contact bearings with high contact angles require a heavier minimum thrust load than a bearing with a low contact angle For this fact bearings with low contact angles like the MRC BB series often work best in pumps where little or no thrust load is present and the loads are primarily radial in nature. MRC offers a wide choice of angular contact bearings for the various load conditions. We offer, 29 and 40 degree bearings. Call 1-00-MRC-7000 for assistance with selecting the proper bearing. These charts show the manufactured preload or clearance standards for angular contact sets. Bore Axial Internal Clearance diameter Class d CA CB CC over incl..001 mm.0001 in.001 mm.0001 in.001 mm.0001 in mm min max min max min max min max min max min max 10 4 1.5 5 14 22 6 9 22 30 9 10 1 5 2 5 23 6 9 24 32 9 1 30 7 3 6 1 26 7 10 32 40 30 50 9 17 4 7 22 30 9 40 4 19 50 0 23 4 9 26 3 10 4 60 19 24 0 0 14 26 5 10 32 44 17 55 67 22 26 0 10 17 29 7 35 47 14 19 62 74 24 29 10 250 21 37 45 61 1 24 74 29 35 250 3 26 42 10 17 52 6 21 27 106 35 42 MRC 7000 PJDE bearings are stocked with the CB execution. Bore Preload diameter Class d GA GB GC over incl. N lbf N lbf N lbf mm min max min max min max min max min max min max 10 1 0 0 0 1 30 330 7 74 230 660 52 0 1 30 0 0 0 27 40 40 9 0 340 970 76 220 30 50 0 0 0 36 60 630 140 450 0 100 2 50 0 0 30 0 5 140 00 31 340 100 3050 240 6 0 0 0 410 0 92 0 00 34 360 50 3250 260 730 0 10 0 540 0 0 200 20 45 40 00 4300 340 970 10 250 0 940 0 210 330 3700 74 30 2650 7500 600 250 3 0 100 0 240 30 4250 5 960 3000 600 670 1930 MRC 7000 PDU bearings are stocked with the GA execution 4
Handling and Maintenance Contamination A high percentage of ball and roller bearing problems can be attributed to foreign matter entering the system. Because bearings are highly sensitive to dirt and moisture, care must be taken to keep the bearings and pump cavity clean. Testing has shown that particles passing through a filter as fine as 5 microns may cause severe damage. Experience has shown that lubricating systems that pressurize the bearing cavity, such as air-oil-mist greatly reduce contamination and increase bearing life. Lubrication Generally, for ball bearings, it is a good rule to select an oil which will have a viscosity of at least 70 SUS ( cst) at the operating temperature. From the following chart, the operating viscosity of an ISO grade oil can be determined at the bearing operating temperature. The frequency of oil change depends upon the operating conditions and the quality of the lubricant. Mineral oils oxidize and should be replaced at three month intervals if operated at approximately 2 F (100 C). Longer intervals are possible at lower Viscosity Centistokes (mm 2 /sec.) Approximate Temperature Conversions Degrees Fahrenheit operating temperatures. Synthetic oils are more resistant to deterioration from exposure to high temperatures and may allow less frequent replacement. Early blackening of the oil strongly indicates a poor lubrication condition which can be from many sources. Multi-grade oils and lubricants with detergents and viscosity improvers are not recommended. Shaft and Housing Fits The standard recommended shaft and housing fit is included in the technical data section for each individual bearing. The tolerances are those recommended for bearings mounted on solid steel shafts. The interference fit between the bearing bore and the shaft journal causes a reduction of clearance in the bearings and an increase in operating preload. Excessive preload may result in a hot running condition. Bearings such as 7000 PDU that have GA preload in the unmounted condition usually employ a light interference fit such as an ISO h5 shaft fit. With bearings that have internal clearance CB, heavier interference fits are usually acceptable. Each time a pump or motor is rebuilt, both the shaft diameter and bearing bore should be measured to be absolutely sure that both meet specification and to eliminate the chance of creating excessive operating preload. Approximate Viscosity Conversions Saybolt Universal Seconds (SUS) Stainless steel shafts have a higher coefficient of thermal expansion than carbon steel shafts. When bearings are installed on stainless steel shafts, it may be necessary to reduce the interference fit and/or select a bearing having greater clearance. Temperature, Degree Celsius Operating Viscosity Chart 5
MRC Bearing Services 1-00-MRC-7000 S-type, single-row, deep groove ball bearing (non-filling slot) 200 Series S-type bearings are used in the radial position in nearly every centrifugal pump and are commonly used in electric motors and magnetic drive pumps. ABEC-1 ABMA Class 3 clearance 30% full of polyurea grease in a bearing with double closures Two-piece riveted steel cage (no polyamide cages for petrochemical use) MRC BEARING NUMBER BORE d mm in OUTSIDE DIAMETER D mm in 1) BASIC RADIAL LOAD RATING WIDTH FILLET RADIUS DYNAMIC 3) STATIC B r a C Co mm mm N N in in lbf lbf BALLS PER ROW DIAMETER NUMBER mm in 206S 207S 20S 209S 210S 2S 2S 2S 214S 2S 2S 217S 21S 30 62 19500 100 9.525 1.1 2.4409.6299 430 2520 9.3750 35 72 17 25500 300.3 1.370 2.346.6693 5730 3440 9.4375 40 0 1 30700 100.304 1.574.707 100 4270 9.444 45 5 19 33200 200.304 1.7717 3.3465.740 7460 460 10.444 50 20 35100 23200.700 1.965.774 7 5220 10.5000 55 100 21 1.5 43600 200 14.2 10 2.54.26.06 0 6520.5625 60 0 22 1.5 47500 32500 3 10 2.3622.661.06 10700 7310.593 65 0 23 1.5 550 40500.75 591.55.06 600.6250 70 5 24 1.5 60500 45000.670 2.7559 4.92.9449.06 600 10100.6563 75 0 25 1.5 66300 400 17.463 2.952 5.1.943.06 140 000.675 0 140 26 7200 53000 19.050 5.5 236 400 0 10.7500 5 0 2 3200 64000 20.63 3.3465 5.55 124 1700 14400 10.5 0 30 95600 73500 21.433 1.1 200 500.43 6 1) Fillet radius indicates maximum fillet radius on shaft or in housing which bearing corner will clear 2) Values have been determined through historical application and practice 3) Rating for one million revolutions at 33 1/3 RPM
The API 610 standard recommends that bearings, other than angular contact bearings should have greater than Normal internal radial clearance. All MRC single-row, deep groove ball bearings, without filling slots, have greater than Normal clearance (C3) as standard. MRC single-row, deep groove ball bearings are assembled with a two-piece, riveted steel ball cage. API 610 strongly recommends against the use of filling slot bearings. MRC product is API 610 compliant. S-type bearings are available with a wide assortment of seals, shields and snap rings. Sealed and shielded bearings are prepacked with a premium quality polyurea grease suitable for non-continuous operating temperatures as high as 300 F (0 C). A typical application of a single-row deep groove ball bearing in the radial position of a centrifugal pump. PITCH DIAMETER mm in GREASE RPM SPEED RATING OIL RPM 2) RECOMMENDED SHAFT DIAMETER (k5) RECOMMENDED HOUSING DIAMETER (H6) MAXIMUM MINIMUM MAXIMUM MINIMUM mm mm mm mm in in in in 46.0 10000 000 30.0 30.002 619 600 1.0 1.1 1.1 2.44 2.4409 53.5 00 000 35.0 35.002 719 700 263 1.375 1.371 2.353 2.346 60.0 500 10000 40.0 40.002 0.019 0.000 2.3622 1.5753 1.5749 3.03 65.0 7500 00 45.0 45.002 5.022 5.000 591 1.7722 1.771 3.3474 3.3465 70.0 7000 500 50.0 50.002.022.000 2.7559 1.96 1.966 3.5442 77.5 6300 7500 55.0 55.002 100.022 100.000 3.05 2.60 2.55 3.9379 4.5 6000 7000 60.0 60.002 0.022 0.000 3.326 2.362 2. 3623 4.33 92. 5300 6300 65.0 65.002 0.022 0.000 3.6535 597 592 4.7253 97.5 5000 6000 70.0 70.002 5.025 5.000 3.36 2.7565 2.7560 4.9223 4.92 10 400 5600 75.0 75.002 0.025 0.000 4.0354 2.9534 2.9529 5.91 5.1 0.0 4500 5300 0.0 0.002 140.025 140.000 3.02 3.1497 5.5 5.5 7.5 4300 5000 5.01 5.003 0.025 0.000 4.6260 3.3472 3.3466 5.65 5.55 5.0 300 4500.01.003 0.025 0.000 4.9331 3.5440 3.5434 6.3002 7
MRC Bearing Services 1-00-MRC-7000 S-type, single-row, deep groove ball bearing (non-filling slot) 300 Series S-type bearings are used in the radial position in nearly every centrifugal pump and are commonly used in electric motors and magnetic drives. ABEC-1 ABMA Class 3 clearance 30% full of polyurea grease in a bearing with double closures Two-piece riveted steel cage (no polyamide cages for petrochemical use) MRC BEARING NUMBER BORE d mm in OUTSIDE DIAMETER D mm in 1) BASIC RADIAL LOAD RATING WIDTH FILLET RADIUS DYNAMIC 3) STATIC B r a C Co mm mm N N in in lbf lbf BALLS PER ROW DIAMETER NUMBER mm in 306S 307S 30S 309S 310S 3S 3S 3S 314S 3S 3S 317S 31S 30 72 19 2100 000.304 1.1 2.346.740 6320 3600.444 35 0 21 1.5 33200 100.495 1.370.26.06 7460 4270.53 40 23 1.5 41000 24000 3 1.574.55.06 9220 5400.593 45 100 25 1.5 52700 300 17.463 1.7717.943.06 0 700.675 50 0 27 6100 3000 19.050 1.965 630 0 540.7500 55 0 29 700 45000 20.63 2.54 1.1417 100 10100.5 60 0 31 10 52000 22.225 2.3622 5.1 1.2205 1400 700.750 65 140 33 92300 60000 23. 591 5.5 1.2992 2000 500.9375 70 0 35 104000 6000 25.400 2.7559 5.55 1.370 23400 300 000 75 0 37 4000 76500 26.9 2.952 1.4567 25600 17200 625 0 170 39 4000 6500 2.575 6.6929 1.5354 270 19400 1.50 5 10 41 3000 96500 30.3 3.3465 766 1.6142 290 21700 1.175 1 43 143000 10000 31.750 7.403 1.6929 32100 24300 1.2500 1) Fillet radius indicates maximum fillet radius on shaft or in housing which bearing corner will clear 2) Values have been determined through historical application and practice 3) Rating for one million revolutions at 33 1/3 RPM
The API 610 standard recommends that bearings, other than angular contact bearings should have greater than Normal internal radial clearance. All MRC single-row, deep groove ball bearings, without filling slots, have greater than Normal clearance (C3) as standard. MRC single-row, deep groove ball bearings are assembled with a two-piece, riveted steel ball cage. API 610 strongly recommends against the use of filling slot bearings. MRC product is API 610 compliant. S-type bearings are available with a wide assortment of seals, shields and snap rings. Sealed and shielded bearings are prepacked with a premium quality polyurea grease suitable for non-continuous operating temperatures as high as 300 F (0 C). A typical application of a single-row deep groove ball bearing in the radial position of a centrifugal pump. PITCH DIAMETER mm in GREASE RPM SPEED RATING OIL RPM 2) RECOMMENDED SHAFT DIAMETER (k5) RECOMMENDED HOUSING DIAMETER (H6) MAXIMUM MINIMUM MAXIMUM MINIMUM mm mm mm mm in in in in 5 30.0 30.002 719 700 00 000 272 1.1 1.1 2.353 2.346 57.5 35.0 35.002 0.019 0.000 500 10000 2.263 1.375 1.371 3.03 65.0 40.0 40.002.022.000 7500 00 591 1.5753 1.5749 3.5442 7 45.0 45.002 100.022 100.000 6700 000 2.543 1.7722 1.771 3.9379 0.0 50.0 50.002 0.022 0.000 6300 7500 1.96 1.966 4.33 7.5 55.0 55.002 0.022 0.000 5600 6700 3.4449 2.60 2.55 4.7253 4.7254 95.0 60.0 60.002 0.025 0.000 5000 6000 3.7402 2.362 2.3623 5.91 5.1 10 65.0 65.002 140.025 140.000 400 5600 4.0354 597 592 5.5 5.5 0.0 70.0 70.002 0.025 0.000 4500 5300 4. 3307 2.7565 2.7560 5.65 5.55 7.5 75.0 75.002 0.025 0.000 4300 5000 4.6260 2.9534 2.9529 6.3002 5.0 0.0 0.002 170.025 170.000 300 4500 4.92 3.02 3.1497 6.6939 6.6929 5.01 5.003 10.025 10.000 3600 4300 5.25 3.3472 3.3466 776 766 140.0.01.003 1.029 1.000 3400 4000 5.5 3.5440 3.5434 7.414 7.403 9
MRC Bearing Services 1-00-MRC-7000 5200 C (non-filling slot) double row angular contact ball bearings Double row angular contact ball bearings are used extensively in ANSI standard centrifugal pumps. In rare cases, it is used as a radial bearing in pumps and motors. ABEC-1 30 contact angle per row C3 internal radial clearance (many sizes available as Normal (C0)) Contact angles converge outside the bearing One-piece steel cages (heat treated) Many sizes available with shields, seals and snap rings Double shielded and double sealed bearings packed 30% full of a high temperature polyurea grease BORE OUTSIDE WIDTH FILLET 1) BASIC RADIAL LOAD RATING 2) BALLS PER ROW MRC DIAMETER RADIUS BEARING DYNAMIC 4) STATIC NUMBER DIAMETER NUMBER d D B r a C Co mm mm mm mm N N mm in in in in lbf lbf in 5206C 5207C 520C 5209C 5210C 52C 52C 52C 5214C 52C 52C 5217C 521C 30 62 23.1 29600 200 9.525 9 1.1 2.4409.9375 6660 4770.3750 35 72 26.99 37700 27500.3 9 1.370 2.346 625 40 610.4375 40 0 30. 440 34000.304 9 1.574 1.175 10100 7640.444 45 5 30. 400 300.304 10 1.7717 3.3465 1.175 000 770.444 50 30. 400 300.304 10 1.965 1.175 000 770.444 55 100 33.34 1.5 57200 47500.495 10 2.54 1.35.06 0 10700.53 60 0 36.51 1.5 70200 5500 3 10 2.3622 1.4375.06 00 200.593 65 0 3 1.5 0600 73500.75 591 1.5000.06 1100 500.6250 70 5 39.69 1.5 400 0000.670 2.7559 4.92 1.5625.06 190 1000.6563 75 0 41.2 1.5 95600 000 17.463 2.952 5.1 1.6250.06 200 10.675 0 140 44.45 106000 95000 19.050 10 5.5 1.7500 230 21400.7500 5 0 49.21 4000 0000 20.63 10 3.3465 5.55 1.9375 270 24700.5 0 52.39 0000 0000 21.433 10 625 29300 27000.43 1) Fillet radius indicates maximum fillet radius on shaft or in housing which bearing corner will clear 2) For thrust rating multiply C by 0.1 and Co by 0.66 3) Values have been determined through historical application and practice 4) Rating for one million revolutions or 500 hours at 33 1/3 RPM 10
Most ANSI style pumps and some older API style pumps use the double row type bearing as the primary thrust bearing. The 30 per row contact angle allows this bearing to carry moderately heavy thrust loads. To achieve optimum performance double row bearings require some radial load. In the chart below, the minimum radial load is listed. MRC 5000 C Bearings are compliant with API 610 requirements. Double row bearings with ball loading grooves are not recommended for pump applications. Typical application of double row bearing in an ANSI process pump. 3) RECOMMENDED RECOMMENDED PITCH MIN. REQD. THRUST FOR SPEED RATING SHAFT DIAMETER (k5) HOUSING DIAMETER (H6) DIAMETER RADIAL LOAD 25000 HRS mm AT 3600 RPM L10 AT 3600 RPM GREASE OIL MAXIMUM MINIMUM MAXIMUM MINIMUM in N N mm mm mm mm lbf lbf RPM RPM in in in in 46.0 42 70 30.0 30.002 619 600 7000 9500 1.0 19 307 1.1 1.1 2.44 2.4409 5 00 1740 35.0 35.002 719 700 6000 000 663 247 391 1.375 1.371 2.353 2.346 5.7 70 2070 40.0 40.002 0.019 0.000 5600 7500 2.32 30 466 1.5753 1.5749 3.03 65.0 0 2260 45.0 45.002 5.022 5.000 5000 6700 591 37 50 1.7722 1.771 3.3474 3.3465 6.9 1 2260 50.0 50.002.022.000 400 6300 2.7107 425 50 1.96 1.966 3.5442 75.4 2260 2650 55.0 55.002 100.022 100.000 4300 5600 2.962 50 596 2.60 2.55 3.9379 2710 3240 60.0 60.002 0.022 0.000 300 5000 3.2464 609 729 2.362 2.3623 4.33 93.5 340 3720 65.0 65.002 0.022 0.000 3600 400 3.61 72 36 597 592 4.7253 97.5 370 40 70.0 70.002 5.025 5.000 3200 4300 3.36 50 919 2.7565 2.7560 4.9223 4.92 101.5 4100 4420 75.0 75.002 0.025 0.000 3200 4300 3.9955 922 993 2.9534 2.9529 5.91 5.1 10.4 460 4 0.0 0.002 140.025 140.000 200 300 4.265 1050 00 3.02 3.1497 5.5 5.5 5.6 5320 5740 5.01 5.003 0.025 0.000 2600 3600 4.5502 00 3.3472 3.3466 5.65 5.55 3.5 6070 6010.01.003 0.025 0.000 2400 3400 4.629 60 50 3.5440 3.5434 6.3002
MRC Bearing Services 1-00-MRC-7000 5300 C double row angular contact ball bearing Double row angular contact ball bearings are used extensively in ANSI standard centrifugal pumps. In rare cases, it is used as a radial bearing in pumps and motors. ABEC-1 30 contact angle per row C3 internal radial clearance (many sizes available as Normal (C0)) Contact angles converge outside the bearing One-piece steel cages (heat treated) Many sizes available with shields, seals and snap rings Double shielded and double sealed bearings packed 30% full of a high temperature polyurea grease BORE OUTSIDE WIDTH FILLET 1) BASIC RADIAL LOAD RATING 2) BALLS PER ROW MRC DIAMETER RADIUS BEARING DYNAMIC 4) STATIC NUMBER d D B r a C Co NUMBER DIAMETER mm mm mm mm N N mm in in in in lbf lbf in 5306C 5307C 530C 5309C 5310C 53C 53C 53C 5314C 53C 53C 5317C 531C 30 72 30. 400 200.303 1.1 2.346 1.175 9360 6520.444 35 0 34.93 1.5 49400 34500.495 1.370 1.3750.06 100 7760.53 40 36.51 1.5 60500 43000 3 1.574 1.4375.06 600 9760.593 45 100 39.69 1.5 7200 53000.670 1.7717 1.5625.06 400 0.6563 50 0 44.45 5200 64000 1.25 1.965 1.7500 19200 14400.71 55 0 49.21 106000 00 20.63 2.54 1.9375 230 1300.5 60 0 53.9 1000 95000 22.225 2.3622 5.1 0 27200 21400.750 65 140 5.74 000 10000 23. 591 5.5 2.35 300 24300.9375 70 0 63.50 3000 5000 25.400 2.7559 5.55 000 34400 2100 00 75 0 6.26 000 140000 26.9 2.952 2.675 3700 300 625 0 170 6.26 12000 6000 2.575 6.6929 2.675 41000 35100 1.50 5 10 73.03 195000 176000 30.3 3.3465 766 2.750 430 39600 1.175 1 73.03 2000 196000 31.750 7.403 2.750 47700 44100 1.2500 1) Fillet radius indicates maximum fillet radius on shaft or in housing which bearing corner will clear 2) For thrust rating multiply C by 0.1 and Co by 0.66 3) Values have been determined through historical application and practice 4) Rating for one million revolutions or 500 hours at 33 1/3 RPM 5) Based on 100 RPM for 53C through 531C
Most ANSI style pumps and some older API style pumps use the double row type bearing as the primary thrust bearing. The 30 per row contact angle allows this bearing to carry moderately heavy thrust loads. To achieve optimum performance double row bearings require some radial load. In the chart below, the minimum radial load is listed. MRC 5000 C Bearings are compliant with API 610 requirements. Double row bearings with ball loading grooves are not recommended for pump applications. Typical application of double row bearing in an ANSI process pump. PITCH MIN. REQD. 5) THRUST FOR 5) 3) RECOMMENDED RECOMMENDED SPEED RATING SHAFT DIAMETER (k5) HOUSING DIAMETER (H6) DIAMETER RADIAL LOAD 25000 HRS mm AT 3600 RPM L10 AT 3600 RPM GREASE OIL MAXIMUM MINIMUM MAXIMUM MINIMUM in N N mm mm mm mm lbf lbf RPM RPM in in in in 51.3 20 1920 30.0 30.002 719 700 6300 500 2 274 432 1.1 1.1 2.353 2.346 56.2 1470 220 35.0 35.002 0.019 0.000 5600 7500 2.2 330 5 1.375 1.371 3.03 63.0 140 27 40.0 40.002.022.000 5000 6700 2.47 414 62 1.5753 1.5749 3.5442 70.0 2270 3370 45.0 45.002 100.022 100.000 4500 6000 2.7544 510 757 1.7722 1.771 3.9379 77.5 27 3940 50.0 50.002 0.022 0.000 4000 5300 3.05 627 6 1.96 1.966 4.33 6.2 3450 4 55.0 55.002 0.022 0.000 300 5000 3.3949 776 00 2.60 2.55 4.7253 93.4 4050 5600 60.0 60.002 0.025 0.000 3400 4500 3.6777 910 60 2.362 2.3623 5.91 5.1 10 4740 6410 65.0 65.002 140.025 140.000 3200 4300 3.9754 1070 1440 597 592 5.5 5.5 109.1 5530 7070 70.0 70.002 0.025 0.000 200 300 4.2954 40 2.7565 2.7560 5.65 5.55 4.0 6030 7740 75.0 75.002 0.025 0.000 2600 3600 4.470 60 1740 2.9534 2.9529 6.3002 4.0 4500 5) 10600 5) 0.0 0.002 170.025 170.000 2400 3400 4.04 1010 23 3.02 3.1497 6.6939 6.6929 1.4 5040 5) 400 5) 5.01 5.003 10.025 10.000 2200 3200 5.1734 30 2560 3.3472 3.3466 776 766. 5630 5) 300 5).01.003 1.029 1.000 2000 3000 5.4664 70 2770 3.5440 3.5434 7.414 7.403
MRC Bearing Services 1-00-MRC-7000 7000 DU series 29 angular contact ball bearings The MRC 7000 DU series is a medium contact angle bearing. Similar in design to the MRC 7000 PDU series, the lower contact angle allows for higher speeds, lower thrust load requirements and greater radial loads. ABEC 1 Heavy-stock, stamped steel cages 29 contact angle GA preload MRC BEARING NUMBER 721DU 7220DU 7222DU 7224DU 7307DU 730DU 7309DU 7310DU 73DU 73DU 73DU 7314DU 73DU 73DU 7317DU 731DU 7319DU 7320DU 7321DU 7322DU 7324DU 7326DU 732DU OUTSIDE FILLET RADIUS 1) BASIC RADIAL LOAD RATING 2) BALLS PER ROW BORE WIDTH DIAMETER d B D r a r b DYNAMIC 4) STATIC NUMBER DIAMETER mm mm mm mm mm C Co mm in in in in in N N in lbf lbf 0 60 2.3622 1000 42700 236000 53100 22.225.750 100 10 766 6 2.6772 225000 50600 260000 5500 17 23..9375 0 200 7.740 76 2.9921 265000 59600 310000 69700 26.9 625 0 2.4646 0 21000 63200 355000 70 2.575 1.50 35 1.370 0 42 1.6535 1.5.06 5500 200 4000 1000.700.5000 40 1.574 46 1.0 1.5.06 700 100 61000 700 14.2.5625 45 1.7717 100 50 1.965 1.5.06 5200 19200 75000 0.75.6250 50 1.965 0 54 2.60 1000 27200 106000 2300 19.050.7500 55 2.54 0 5 2.235 140000 300 5000 2100 20.63.5 60 2.3622 0 5.1 62 2.4409 00 35700 146000 3200 22.225.750 65 591 140 5.5 66 94 17000 40000 173000 30 14 22.225.750 70 2.7559 0 5.55 70 2.7559 12000 400 170000 3200 23..9375 75 2.952 0 74 2.94 225000 50600 22000 500 14 25.400 000 0 170 6.6929 7 3.0709 234000 52600 240000 54000 26.9 625 5 3.3465 10 766 2 3.223 265000 59600 25000 64100 14 2.575 1.50 1 7.403 6 3.35 276000 62000 300000 67400 30.3 1.175 95 3.7402 200 7.740 291000 65400 325000 73100 31.750 1.2500 100 2.4646 94 3.700 3000 70100 365000 2100 33.33 1.35 105 4.39 225.53 9 3.53 332000 74600 400000 90 34.925 1.3750 0 240 9.44 100 371000 3400 475000 107000 30 1.5000 0 260 10.2362 0 423000 95100 560000 6000 41.275 1.6250 0 5.1 20 36 6 4.5669 3.0. 46000 105000 640000 144000 44.450 1.7500 140 5.5 300.0 4 4.319 3.0. 507000 4000 735000 5000 47.625 1.750 14 1) Fillet radius indicates maximum fillet radius on shaft or in housing which bearing corner will clear 2) For thrust rating multiply C by 0.1 and Co by 1.47 3) Listed values are for machined brass cages. Values have been determined through historical application and practice
Due to the 29 contact angle and smaller balls, this bearing can run with a relatively low thrust load. It also runs well with a combination of moderate thrust and radial load. The 7000 DU series should be considered for applications where thrust is moderate and the pump has a history of running hot. Many older style API pumps were equipped with the 7000 DU bearing-type. When replaced with a 40 angular contact bearing, these older pumps often run much hotter. These bearings are stocked with flush ground faces ( GA preload). When heavier than recommended shaft interferences are employed, a bearing with a clearance (CB) may be necessary. Special clearances can be obtained on a made-to-order basis. PITCH MIN. REQD. 5) THRUST FOR 5) 3) RECOMMENDED RECOMMENDED SPEED RATING SHAFT DIAMETER (h5) HOUSING DIAMETER (H6) DIAMETER THRUST LOAD 25000 HRS mm AT 3600 RPM L10 AT 3600 RPM GREASE OIL MAXIMUM MINIMUM MAXIMUM MINIMUM in N N mm mm mm mm lbf lbf RPM RPM in in in in 5.0 4.92 30 277 7 1977 20 300.000 9.95 3.5427 0.025 6.3002 0.000 45 5) 100 5) 5.25 103 2950 2600 3300 100.000 99.95 3.9364 10.025 776 10.000 766 5.0 69 5) 500 5) 623 5 340 2300 3000 0.000 109.95 4.3301 200.029 7.751 200.000 7.740 6.7 1 5) 400 5) 6.5647 19 36 2200 200 0.000 9.95 4.723 2.029.4647 2.000.4646 57. 2.2751 76 17 2720 6 600 00 35.000 1.370 34.9 1.3776 0.019 3.03 0.000 65.3 719 0 27 3310 745 500 7600 40.000 1.574 39.9 1.5744.022 3.5442.000 72.9 2.67 17 42 3950 9 5100 6600 45.000 1.7717 44.9 1.77 100.022 3.9379 100.000 0.0 342 77 5600 60 4600 6000 50.000 1.965 49.9 1.961 0.022 4.33 0.000 5.4 3.3610 476 107 64 1460 4100 5300 55.000 2.54 54.9 2.49 0.022 4.7253 0.000 95.0 3.7401 649 146 7340 50 30 5100 60.000 2.3622 59.9 2.3617 0.025 5.91 0.000 5.1 103.0 4.0557 41 19 230 0 3700 400 65.000 591 64.9 56 140.025 5.5 140.000 5.5 0.0 947 2 410 1 3300 4200 70.000 2.7559 69.9 2.7554 0.025 5.65 0.000 5.55.1 4.6491 1440 323 10400 2340 3100 4000 75.000 2.952 74.9 2.9523 0.025 6.3002 0.000 5.0 4.92 1700 33 100 2440 20 300 0.000 79.9 3.1491 170.025 6.6939 170.000 6.6929 3.2 5.2427 2310 519 300 2760 200 3600 5.000 3.3465 4.95 3.3459 10.025 776 10.000 766 140.0 5.5 667 0 100 3620 2600 3400.000 9.95 3.5427 1.029 7.414 1.000 7.403 147.5 5.071 1 14 17000 320 2500 3200 95.000 3.7402 94.95 3.7396 200.029 7.751 200.000 7.740 7.5 1020 5) 1200 5) 6.2007 229 40 2400 3100 100.000 99.95 3.9364 2.029.4647 2.000.4646 5.0 20 5) 19300 5) 6.4960 275 4350 2300 3000 105.000 4.39 104.95 4.33 225.029.594 225.000.53 175.9 70 5) 21700 5) 6.9242 376 470 2200 200 0.000 109.95 4.3301 240.029 9.4499 240.000 9.44 1.9 2310 5) 24700 5) 7.4351 520 5550 2000 2600 0.000 9.95 4.723 260.032 10.2375 260.000 10.2362 203. 30 5) 27300 5).0227 701 60 100 2400 0.000 5.1 9.92 5.74 20.032 47 20.000 36 21.7 40 5) 29600 5).6104 925 6650 100 2200 140.000 5.5 9.92 5.51 300.032.3 300.000.0 4) Rating for one million revolutions or 500 hours at 33 1/3 RPM 5) Based on 100 RPM for 7220DU through 7224DU and 731DU through 732DU
MRC Bearing Services 1-00-MRC-7000 PumPac 000 Series The PumPac 000 series is used in centrifugal pumps, large vertical electric motors, compressors, centrifuges, and other applications subject to thrust loads operating at relatively high speeds. The bearings are mounted so that the 40 bearing takes the primary thrust, or axial load. The PumPac series is a matched set consisting of 40 and angular contact ball bearings with computer optimized internal design. The 000 series has one 40 bearing mounted back-to-back with a bearing. The 000 AAB series has two tandem mounted 40 bearings mounted back-to-back with one bearing. ABEC 3 Tolerances 40 / Contact Angles Land-riding machined brass cage CB Clearance Heat treated for dimensional stability V etched O.D. Traditionally, matched sets of 40 angular contact bearings are used to obtain maximum theoretical fatigue life, but in most instances only a fraction of the calculated life is actually achieved. At the heart of these premature failures are phenomena known as ball sliding and ball shuttling in the unloaded or inactive bearing. Angular contact bearings used in high speed (i.e., 3600 RPM) pumps and other applications require a minimum axial load for proper operation. Without axial load, centrifugal and gyroscopic forces in the unloaded bearing can cause the balls to rotate at an angle to their true rolling axis and momentarily lose contact with the raceway. As a result, a microscopic wear or lapping process occurs, giving the appearance of a burnished or polished raceway. The oil film thickness separating the ball and raceway is reduced, producing friction and heat with lower oil viscosity, accelerating wear. This thermally unstable condition dramatically reduces bearing service life. The main benefit of the PumPac bearing system is that the bearing is designed with considerably less internal clearance than the 40 degree bearing, making it less susceptible to the centrifugal and gyroscopic forces which result in ball sliding or shuttling. This bearing also provides additional radial stiffness helping to maintain integrity of the shaft and mechanical seals. The 40 degree loaded bearing provides sufficient axial rigidity under the imposed thrust load.
1) 40 (A) Bearing FILLET RADIUS MRC BORE OUTSIDE WIDTH BASIC RADIAL LOAD RATING 2) BALLS PER ROW PITCH MIN. REQD. 5) THRUST FOR. 5) BEARING d DIAMETER B r a r b DYNAMIC 4) STATIC NUMBER DIAMETER DIAMETER THRUST AT 25000 HRS NUMBER mm D mm mm mm C Co mm mm 3600 RPM L10 @ 3600 RPM in mm in in in N N in in N N in lbf lbf lbf lbf 21 219 220 222 224 23 30 309 310 3 3 3 314 3 3 317 31 319 320 322 326 330 336 0 60 3000 143000 23.020 5.0 1925 270 2.3622 290 32100.63 4.9394 433 2 95 170 64 1000 3000 24.60 3.0 247 060 3.7402 6.6929 197 330 36600.96 5.2360 559 330 100 10 6 00 173000 25.400 140.0 24 0 766 2.6772 35700 30 000 5.531 653 3560 0 200 76 1000 220000 2.575 5.0 4563 100 7.770 2.9921 42700 49500 1.50 6.4 1026 4260 0 2 0 23000 245000 30.3 7.5 53 23700.4646 53500 55100 1.175 6.614 5340 1 340 0 3.0 351000 570000 42.63 265.0 097 5) 44100 5) 17 7.403.35. 70 000 1.675 10.466 120 9920 40 46 1.5 60500 45500.670 65.0 224 6040 10 1.574 1.0.06 600 10200.6563 591 50 60 45 100 50 1.5 76100 61000 1.25 7 377 75 1.7717 1.965.06 17100 700.71 2.544 5 1710 50 0 54 7100 72000 19.45 0.0 470 6 1.965 2.60 19600 200.7 106 1950 55 0 5 101000 5000 21.433 7.5 743 10100 2.54 2.245 22700 19100.43 3.4449 7 2270 60 0 62 4000 96500 23.020 95.0 1002 400 2.3622 5.1 2.4409 25600 21700.63 3.7402 225 2560 65 140 66 7000 1000 24.60 10 143 700 591 5.5 94 2500 25200.96 4.0355 333 250 70 0 70 14000 4000 26.9 0.0 174 1400 2.7559 5.55 2.7559 33300 300 625 421 3320 75 0 74 00 0000 2.575 7.5 236 0 2.952 2.94 35700 33700 1.50 4.6260 532 3570 0 170 7 172000 6000 30.3 5.0 2797 17200 6.6929 3.0709 3700 37300 1.175 4.92 629 360 5 10 2 000 000 31.750 3491 00 3.3465 766 3.223 4100 4100 1.2500 5.26 75 4170 1 6 1900 204000 33.33 0.0 4307 190 7.403 3.35 44700 450 1.35 5.5 96 4460 95 200 2000 22000 34.925 147.5 525 200 3.7402 7.740 47600 500 1.3750 5.071 2 4750 100 2 94 23000 270000 36.5 7.5 7 23700.4646 3.700 53500 60700 1.4375 6.200 134 5340 0 240 100 265000 320000 39.6 175.0 2931 5) 33300 5) 9.44 59600 710 1.5625 6.9 659 74 0 20 6 3.0 345000 455000 47.625 205.0 524 5) 43400 5) 5.1 36 4.5669. 77500 102000 1.750.0709 9750 0 320 0 3.0 410000 55000 53.975 235.0 4 5) 500 5) 5.55.594 5.1. 92100 2000 0 9.2520 199 600 10 30 0 3.0 507000 000 60.325 20.0 219 5) 63700 5) 766 14.9606 5.55. 4000 13000 2.3750 36 3646 14300 1) Fillet radius indicates maximum fillet radius on shaft or in housing which bearing corner will clear 2) For thrust rating of bearing (A), multiply C by 1.75 and Co by 3.5 For thrust rating of bearing (B), multiply C by 0.3 and Co by 0 17
(B) Bearing BASIC RADIAL LOAD RATING 2) BALLS PER ROW PITCH MIN. REQD. 5) THRUST FOR 5) DYNAMIC 4) STATIC NUMBER DIAMETER DIAMETER THRUST AT 25000 HRS C Co mm mm 3600 RPM L10 @ 3600 RPM N N in in N N lbf lbf lbf lbf SPEED RATING RECOMMENDED SHAFT DIAMETER (k5) RECOMMENDED HOUSING DIAMETER (H6) GREASE OIL MAXIMUM MINIMUM MAXIMUM MINIMUM mm mm mm mm RPM RPM in in in in 4000 10000 22.225 5.4 271 5560.01.003 0.025 0.000 3400 4500 270 24300.750 4.9362 61 50 3.5440 3.5434 6.3002 3000 000 22.225 3.4 3 5960 95.01 95.003 170.025 170.000 3200 4300 290 26500.750 5.25 70 40 3.7409 3.7403 6.6939 6.6929 146000 4000 23. 141.7 405 64 100.01 100.003 10.025 10.000 3000 4000 3200 30100.9375 5.576 91 1460 3.9377 3.9371 776 766 12000 170000 26.9 6.9 649 100 0.01 0.003 200.029 200.000 2600 3600 400 3200 625 6.1754 146 120 4.3314 4.330 7.751 7.740 1900 193000 2.575 7.9 27 10 0.01 0.003 2.029 2.000 2200 3200 44700 29200 1.50 6.6096 1 4.7251 4.7245.4647.4646 377000 500000 42.63 265.4 3 5) 200 5) 1.024 1.004 340.036 340.000 17 1400 10 400 1000 1.675 10.4500 266 46 7.4 7.405.372.35 400 33500 14.2 65.3 27 2220 40.0 40.002.022.000 6700 00 000 7530.5625 719 6 500 1.5753 1.5749 3.5442 5500 40500.75 72.9 44 2670 45.0 45.002 100.022 100.000 6000 000 200 9100.6250 2.67 10 600 1.7722 1.771 3.9379 76100 52000 19.050 7. 71 3430 50.0 50.002 0.022 0.000 5300 7000 17100 700.7500 325 770 1.96 1.966 4.33 400 61000 20.63 5.4 9 4000 55.0 55.002 0.022 0.000 400 6300 190 700.5 3.3610 22 0 2.60 2.55 4.7253 101000 71000 22.225 95.0 4540 60.0 60.002 0.025 0.000 4500 6000 22700 000.750 3.7401 31 1020 2.362 2.3623 5.91 5.1 10000 0000 22.225 103.0 5 450 65.0 65.002 140.025 140.000 4300 5600 24300 1000.750 4.0557 37 10 597 592 5.5 5.5 1000 93000 23. 0.5 21 5430 70.0 70.002 0.025 0.000 300 5000 27200 200.9375 4.3524 49 20 2.7565 2.7560 5.65 5.55 146000 4000 25.400.0 307 6540 75.0 75.002 0.025 0.000 3600 400 3200 25600 000 4.6491 69 1470 2.9534 2.9529 6.3002 00 00 26.9 5.6 396 70 0.0 0.002 170.025 170.000 3400 4500 35700 42700 625 4.9459 9 00 3.02 3.1497 6.6939 6.6929 174000 146000 2.575 3.2 49 770 5.01 5.003 10.025 10.000 3200 4300 39100 3200 1.50 5.2427 1 1750 3.3472 3.3466 776 766 000 0000 30.3 140.0 614 270.01.003 1.029 1.000 3000 4000 4100 36000 1.175 5.5 0 3.5440 3.5434 7.414 7.403 1900 10000 31.750 14.2 761 760 95.01 95.003 200.029 200.000 200 300 44700 40500 1.2500 5.361 171 1970 3.7409 3.7403 7.751 7.740 2000 200000 33.33.3 943 9340 100.01 100.003 2.029 2.000 2600 3600 47700 45000 1.35 6.231 2 2100 3.9377 3.9371.4647.4646 255000 255000 30 175.9 37 5) 14300 5) 0.01 0.003 240.029 240.000 2200 3200 57300 57300 1.5000 6.9242 7 3220 4.3314 4.330 9.4499 9.44 296000 345000 44.450 203. 7 5) 400 5) 0.021 0.003 20.032 20.000 100 2600 66500 77600 1.7500.0227 0 360 5.9 5.2 47 36 3000 475000 49.2 233.6 5) 200 5) 0.021 0.003 320.036 320.000 00 2200 7700 107000 1.9375 9.1956 252 440 5.63 5.56.599.594 475000 640000 57.0 27.3 2269 5) 2500 5) 10.021 10.003 30.036 30.000 14 00 00 107000 144000 2.2500 10.9561 510 500 774 767 14.9620 14.9606 3) Values have been determined through historical application and practice 4) Rating for one million revolutions or 500 hours at 33 1/3 RPM calculated according to actual bearing geometry 5) Based on 100 RPM for 23 and 322 through 336 1 3)
MRC Bearing Services 1-00-MRC-7000 PumPac 000 AAB Series The PumPac 000 AAB series consists of a triplex set with two 40 bearings matched back-to-back with one bearing. ABEC 3 Tolerances 40 / Contact Angles Land-riding machined brass cage CB Clearance 19
1) 40 (AA) Bearings FILLET RADIUS MRC BORE OUTSIDE WIDTH BASIC RADIAL LOAD RATING 2) BALLS PER ROW PITCH MIN. REQD. 5) THRUST FOR. 5) BEARING d DIAMETER B r a r b DYNAMIC 4) STATIC NUMBER DIAMETER DIAMETER THRUST AT 25000 HRS NUMBER mm D mm mm mm C Co mm mm 3600 RPM L10 @ 3600 RPM in mm in in in N N in in N N in lbf lbf lbf lbf 21AAB 219AAB 220AAB 222AAB 224AAB 23AAB 30AAB 309AAB 310AAB 3AAB 3AAB 3AAB 314AAB 3AAB 3AAB 317AAB 31AAB 319AAB 320AAB 322AAB 326AAB 330AAB 336AAB 0 2000 25000 23.020 5.0 350 246 4500 64100.63 4.9394 66 43 95 170 96 247000 325000 24.60 3.0 4974 2463 3.7402 6.6929 3.7795 55500 73100.96 5.2360 1 5536 100 10 102 260000 345000 25.400 140.0 50 25935 766 4.07 5400 7700 000 5.531 06 525 0 200 4 307000 440000 2.575 5.0 96 30623 7.770 4.42 600 90 1.50 6.4 2052 63 0 2 0 3000 4000 30.3 7.5 676 33.4646 7600 0000 1.175 6.614 2624 73 1 340 5 3.0 572000 40000 42.63 265.0 194 5) 719 17 5) 7.403.35 6.4961. 00 256000 1.675 10.466 3640 2 40 69 1.5 97500 900.670 65.0 44 9726 10 1.574 2.75.06 210 20600.6563 591 100 2 45 100 75 1.5 4000 2000 1.25 7 754 369 1.7717 2.952.06 270 27400.71 2.544 170 273 50 0 1 143000 143000 19.45 0.0 940 14264 1.965 3.1 32100 32100.7 2 3202 55 0 7 5000 170000 21.433 7.5 146 459 2.54 3.4252 37100 3200.43 3.4449 334 3701 60 0 93 000 193000 23.020 95.0 2004 54 2.3622 5.1 3.6614 4100 43400.63 3.7402 450 4170 65 140 99 20000 224000 24.60 10 2966 2074 591 5.5 3.976 46700 50400.96 4.0355 666 465 70 0 105 242000 270000 26.9 0.0 374 24140 2.7559 5.55 4.39 54400 60700 625 42 5426 75 0 1 260000 300000 2.575 7.5 4736 25935 2.952 4.3701 5400 67400 1.50 4.6260 1064 525 0 170 7 21000 335000 30.3 5.0 5594 2030 6.6929 4.6063 63100 75300 1.175 4.92 5 6294 5 10 3 302000 375000 31.750 692 305 3.3465 766 4.425 670 4300 1.2500 5.26 70 6773 1 9 325000 405000 33.33 0.0 614 32419 7.403 5.077 73000 91000 1.35 5.5 1936 722 95 200 5 345000 455000 34.925 147.5 105 34414 3.7402 7.740 5.30 77500 102000 1.3750 5.071 2364 7731 100 2 141 3000 540000 36.5 7.5 314 33.4646 5.55 7600 1000 1.4375 6.200 366 73 0 240 0 436000 640000 39.6 175.0 562 5) 54796 5) 9.44 5.55 00 144000 1.5625 6.9 1 317 0 20 174 3.0 5500 9000 47.625 205.0 1056 5) 70255 5) 5.1 36 6.504. 6000 206000 1.750.0709 2376 36 0 320 195 3.0 663000 0000 53.975 235.0 17696 5) 3326 5) 5.55.594 7.6772. 1400 265000 0 9.2520 397 1726 10 30 225 3.0 24000 30000 60.325 20.0 32436 5) 103560 5) 766 14.9606.53. 000 366000 2.3750 36 7292 23251 1) Fillet radius indicates maximum fillet radius on shaft or in housing which bearing corner will clear 2) For thrust rating of bearings (AA), multiply C by 1.75 and Co by 3.5 For thrust rating of bearing (B), multiply C by 0.3 and Co by 0 20
BASIC RADIAL LOAD RATING 2) (B) Bearing BALLS PER ROW PITCH MIN. REQD. 5) THRUST FOR 5) DYNAMIC 4) STATIC NUMBER DIAMETER DIAMETER THRUST AT 25000 HRS C Co mm mm 3600 RPM L10 @ 3600 RPM N N in in N N lbf lbf lbf lbf 3) SPEED RATING RECOMMENDED SHAFT DIAMETER (k5) RECOMMENDED HOUSING DIAMETER (H6) GREASE OIL MAXIMUM MINIMUM MAXIMUM MINIMUM mm mm mm mm RPM RPM in in in in 4000 10000 22.225 5.4 271 5560.01.003 0.025 0.000 3400 4500 270 24300.750 4.9362 61 50 3.5440 3.5434 6.3002 3000 000 22.225 3.4 3 5960 95.01 95.003 170.025 170.000 3200 4300 290 26500.750 5.25 70 40 3.7409 3.7403 6.6939 6.6929 146000 4000 23. 141.7 405 64 100.01 100.003 10.025 10.000 3000 4000 3200 30100.9375 5.576 91 1460 3.9377 3.9371 776 766 12000 170000 26.9 6.9 649 100 0.01 0.003 200.029 200.000 2600 3600 400 3200 625 6.1754 146 120 4.3314 4.330 7.751 7.740 1900 193000 2.575 7.9 27 10 0.01 0.003 2.029 2.000 2200 3200 44700 29200 1.50 6.6096 1 4.7251 4.7245.4647.4646 377000 500000 42.63 265.4 3 5) 200 5) 1.024 1.004 340.036 340.000 17 1400 10 400 1000 1.675 10.4500 266 46 7.4 7.405.372.35 400 33500 14.2 65.3 27 2220 40.0 40.002.022.000 6700 00 000 7530.5625 719 6 500 1.5753 1.5749 3.5442 5500 40500.75 72.9 44 2670 45.0 45.002 100.022 100.000 6000 000 200 9100.6250 2.67 10 600 1.7722 1.771 3.9379 76100 52000 19.050 7. 71 3430 50.0 50.002 0.022 0.000 5300 7000 17100 700.7500 325 770 1.96 1.966 4.33 400 61000 20.63 5.4 9 4000 55.0 55.002 0.022 0.000 400 6300 190 700.5 3.3610 22 0 2.60 2.55 4.7253 101000 71000 22.225 95.0 4540 60.0 60.002 0.025 0.000 4500 6000 22700 000.750 3.7401 31 1020 2.362 2.3623 5.91 5.1 10000 0000 22.225 103.0 5 450 65.0 65.002 140.025 140.000 4300 5600 24300 1000.750 4.0557 37 10 597 592 5.5 5.5 1000 93000 23. 0.5 21 5430 70.0 70.002 0.025 0.000 300 5000 27200 200.9375 4.3524 49 20 2.7565 2.7560 5.65 5.55 146000 4000 25.400.0 307 6540 75.0 75.002 0.025 0.000 3600 400 3200 25600 000 4.6491 69 1470 2.9534 2.9529 6.3002 00 00 26.9 5.6 396 70 0.0 0.002 170.025 170.000 3400 4500 35700 42700 625 4.9459 9 00 3.02 3.1497 6.6939 6.6929 174000 146000 2.575 3.2 49 770 5.01 5.003 10.025 10.000 3200 4300 39100 3200 1.50 5.2427 1 1750 3.3472 3.3466 776 766 000 0000 30.3 140.0 614 270.01.003 1.029 1.000 3000 4000 4100 36000 1.175 5.5 0 3.5440 3.5434 7.414 7.403 1900 10000 31.750 14.2 761 760 95.01 95.003 200.029 200.000 200 300 44700 40500 1.2500 5.361 171 1970 3.7409 3.7403 7.751 7.740 2000 200000 33.33.3 943 9340 100.01 100.003 2.029 2.000 2600 3600 47700 45000 1.35 6.231 2 2100 3.9377 3.9371.4647.4646 255000 255000 30 175.9 37 5) 14300 5) 0.01 0.003 240.029 240.000 2200 3200 57300 57300 1.5000 6.9242 7 3220 4.3314 4.330 9.4499 9.44 296000 345000 44.450 203. 7 5) 400 5) 0.021 0.003 20.032 20.000 100 2600 66500 77600 1.7500.0227 0 360 5.9 5.2 47 36 3000 475000 49.2 233.6 5) 200 5) 0.021 0.003 320.036 320.000 00 2200 7700 107000 1.9375 9.1956 252 440 5.63 5.56.599.594 475000 640000 57.0 27.3 2269 5) 2500 5) 10.021 10.003 30.036 30.000 14 00 00 107000 144000 2.2500 10.9561 510 500 774 767 14.9620 14.9606 3) Values have been determined through historical application and practice 4) Rating for one million revolutions or 500 hours at 33 1/3 RPM calculated according to actual bearing geometry 5) Based on 100 RPM for 23AA and 322 through 336 21
MRC Bearing Services 1-00-MRC-7000 000 BB PumPac Diamond angular contact ball bearing The PumPac Diamond series consists of two B bearings from the regular PumPac series. These degree angular contact ball bearings are placed back-to-back, so that the etching on the bearing outside diameters form a diamond. This bearing system is designed to carry primarily radial loads with light thrust loads in either direction. It incorporates all of the other PumPac features including the land-riding, machined brass cage and special heat treatment for optimum dimensional stability. ABEC 3 tolerances Land-riding machined brass cage CB clearance Specially heat treated for dimensional stability Diamond etched O.D. 22 MRC BEARING NUMBER 21BB 219BB 220BB 222BB 224BB 23BB 30BB 309BB 310BB 3BB 3BB 3BB 314BB 3BB 3BB 317BB 31BB 319BB 320BB 322BB 326BB 330BB 336BB OUTSIDE FILLET RADIUS 1) BASIC RADIAL LOAD RATING 2) BALLS PER ROW BORE WIDTH DIAMETER d B r a r b DYNAMIC 4) D STATIC NUMBER DIAMETER mm mm mm mm mm C Co mm in in in in in N N in lbf lbf 0 60 2.3622 203000 45600 2000 4600 22.225.750 95 3.7402 170 6.6929 64 197 2000 4600 236000 53100 22.225.750 100 10 766 6 2.6772 23000 53500 270000 60700 23..9375 0 200 7.770 76 2.9921 296000 66500 340000 76400 26.9 625 0 2.4646 0 3100 7100 3000 7700 2.575 1.50 1 7.403 340.35 0 3.0. 605000 6000 1000000 225000 17 42.63 1.675 40 1.574 46 1.0 1.5.06 79300 1700 67000 100 14.2.5625 45 1.7717 100 50 1.965 1.5.06 95600 200 00 1300.75.6250 50 1.965 0 54 2.60 4000 270 104000 23400 19.050.7500 55 2.54 0 5 2.245 143000 32100 2000 27400 20.63.5 60 2.3622 0 5.1 62 2.4409 5000 37100 143000 32100 22.225.750 65 591 140 5.5 66 94 174000 39100 0000 36000 22.225.750 70 2.7559 0 5.55 70 2.7559 1900 44700 1000 42700 23..9375 75 2.952 0 74 2.94 23000 53500 22000 500 25.400 000 0 170 6.6929 7 3.0709 255000 57300 260000 5500 26.9 625 5 3.3465 10 766 2 3.223 21000 63200 260000 5500 2.575 1.50 1 7.403 6 3.35 302000 670 325000 73100 30.3 1.175 95 3.7402 200 7.740 325000 73100 360000 00 31.750 1.2500 100 2 94 345000 400000 33.33.4646 3.700 77600 90 1.35 0 240 9.44 100 4000 93500 510000 5000 30 1.5000 0 5.1 20 36 6 4.5669 3.0. 475000 107000 695000 6000 44.450 1.7500 0 5.55 320.594 0 5.1 3.0. 624000 140000 950000 214000 49.2 1.9375 10 30 0 3.0 70000 70000 14 57.0 766 14.9606 5.55. 175000 26000 2.2500 1) Fillet radius indicates maximum fillet radius on shaft or in housing which bearing corner will clear 2) For thrust rating multiply C by 0.51 and Co by 0
The PumPac Diamond is used in centrifugal pumps and motors where the thrust loads are light and radial loads predominate. Double suction pumps with between bearing designs and pumps with closed impellers usually benefit from this bearing solution. The degree contact angle causes the bearings to run cooler in these types of pumps. Vibration is also substantially reduced. Even though the calculated life of the PumPac diamond may be less than that for a 40 degree bearing solution, longer service life in low thrust load application can be expected. PumPac Diamond bearing sets are supplied in pairs, strapped together, ready for assembly. PumPac Diamond can not be installed backwards, because both bearings are identical. In high temperature applications, it may be necessary to provide extra clearance in the set to avoid radial preload. Call 1-00-MRC- 7000 for assistance in determining the correct clearance. To determine when an application s thrust load warrants using PumPac Diamond, see the tabulations below. PITCH MIN. REQD. 5) THRUST FOR 5) 3) RECOMMENDED RECOMMENDED SPEED RATING SHAFT DIAMETER (k5) HOUSING DIAMETER (H6) DIAMETER THRUST LOAD 25000 HRS mm AT 3600 RPM L10 AT 3600 RPM GREASE OIL MAXIMUM MINIMUM MAXIMUM MINIMUM in N N mm mm mm mm lbf lbf RPM RPM in in in in 5.4 4.9362 271 61 5560 50 300 5400.01 3.5440.003 3.5434 0.025 6.3002 0.000 3.4 5.25 3 70 5960 40 3600 5100 95.01 3.7409 95.003 3.7403 170.025 6.6939 170.000 6.6929 141.7 5.576 405 91 64 1460 3400 400 100.01 3.9377 100.003 3.9371 10.025 776 10.000 766 6.9 6.1754 649 146 100 120 3000 4400 0.01 4.3314 0.003 4.330 200.029 7.751 200.000 7.740 7.9 6.6096 27 10 1 200 4100 0.01 4.7251 0.003 4.7245 2.029.4647 2.000.4646 265.4 3 5) 200 5) 100 2600 1.024 1.004 340.036 340.000 10.4500 266 46 7.4 7.405.372.35 65.3 719 27 6 2220 500 7500 000 40.0 1.5753 40.002 1.5749.022 3.5442.000 72.9 2.67 44 10 2670 600 600 9600 45.0 1.7722 45.002 1.771 100.022 3.9379 100.000 7. 325 71 3430 770 6300 00 50.0 1.96 50.002 1.966 0.022 4.33 0.000 5.4 3.3610 9 22 4000 0 5600 100 55.0 2.60 55.002 2.55 0.022 4.7253 0.000 95.0 3.7401 31 4540 1020 5000 7200 60.0 2.362 60.002 2.3623 0.025 5.91 0.000 5.1 103.0 4.0557 5 37 450 10 400 600 65.0 597 65.002 592 140.025 5.5 140.000 5.5 0.5 4.3524 21 49 5430 20 4500 6300 70.0 2.7565 70.002 2.7560 0.025 5.65 0.000 5.55.0 4.6491 307 69 6540 1470 4300 6000 75.0 2.9534 75.002 2.9529 0.025 6.3002 0.000 5.6 4.9459 396 9 70 00 300 5400 0.0 3.02 0.002 3.1497 170.025 6.6939 170.000 6.6929 3.2 5.2427 49 1 770 1750 3600 5100 5.01 3.3472 5.003 3.3466 10.025 776 10.000 766 140.0 5.5 614 270 0 3400 400.01 3.5440.003 3.5434 1.029 7.414 1.000 7.403 14.2 5.361 761 171 760 1970 3300 4500 95.01 3.7409 95.003 3.7403 200.029 7.751 200.000 7.740.3 943 9340 3000 4400 100.01 100.003 2.029 2.000 6.231 2 2100 3.9377 3.9371.4647.4646 175.9 6.9242 57 350 19100 4300 2600 30 0.01 4.3314 0.003 4.330 240.029 9.4499 240.000 9.44 203. 7 5) 400 5) 2300 3300 0.021 0.003 20.032 20.000.0227 0 360 5.9 5.2 47 36 233.6 5) 200 5) 2000 20 0.021 0.003 320.036 320.000 9.1956 252 440 5.63 5.56.599.594 27.3 2269 5) 2500 5) 00 2400 10.021 10.003 30.036 30.000 10.9561 510 500 774 767 14.9620 14.9606 3) Values have been determined through historical application and practice 4) Rating for one million revolutions or 500 hours at 33 1/3 RPM calculated according to actual bearing geometry 5) Based on 100 RPM for 23BB and 326BB through 336BB 23
MRC Bearing Services 1-00-MRC-7000 7000 PJDE 40 angular contact bearing with machined brass, ball centered cage; CB clearance The 7000 PJDE bearing is supplied with a ball centered machined brass cage with a CB clearance. Call 1-00-MRC-7000 for availability and other clearance/preload executions. ABEC 3 Ball guided machined brass cage Special clearance, available on a made-to order basis. Stocked as half pairs universal duplex 40 contact angle FILLET RADIUS MRC BORE OUTSIDE WIDTH 1) BASIC RADIAL LOAD RATING 2) BALLS PER ROW BEARING d DIAMETER B r a r b DYNAMIC 4) STATIC NUMBER DIAMETER NUMBER mm D mm mm mm C Co mm in mm in in in N N in in lbf lbf 721PJDE 0 60 2.3622 17000 40000 1000 42700 200 0.5 7220PJDE 100 10 766 6 2.6772 221000 49700 245000 55100 25.400 000 7222PJDE 0 200 7.740 76 2.9921 260000 5500 2000 65200 2.575 1.50 7224PJDE 0 2.4646 0 270000 60700 325000 73100 30.3 1.175 7307PJDE 35 1.370 0 42 1.6535 1.5.06 62400 14000 400 000 14.2 0.5625 730PJDE 40 1.574 46 1.0 1.5.06 74100 00 61000 700.75 0.6250 7309PJDE 45 1.7717 100 50 1.965 1.5.06 92300 2000 75000 0 17.700 0.696 7310PJDE 50 1.965 0 54 2.60 1000 25200 95000 21400 19.44 0.7 73PJDE 55 2.54 0 5 2.235 0000 29200 0000 24700 21.431 0.43 73PJDE 60 2.3622 0 5.1 62 2.4409 6000 35100 140000 300 23.019 0.63 73PJDE 65 591 140 5.5 66 94 174000 39100 0000 36000 24.606 0.96 7314PJDE 70 2.7559 0 5.55 70 2.7559 195000 4300 10000 40500 26.194 3 73PJDE 75 2.952 0 74 2.94 203000 45600 193000 43400 26.9 625 73PJDE 0 170 6.6929 7 3.0709 221000 49700 220000 49500 2.575 1.50 7317PJDE 5 3.3465 10 766 2 3.223 23000 53500 245000 55100 30.2 1.175 731PJDE 1 7.403 6 3.35 255000 57300 270000 60700 31.750 1.2500 7319PJDE 95 3.7402 200 7.740 270000 60700 300000 67400 33.33 1.35 7320PJDE 100 2.4646 94 3.700 325000 73100 30000 5400 37. 1.5000 7321PJDE 105 4.39 225.53 9 3.53 325000 73100 30000 5400 37. 1.5000 7322PJDE 0 240 100 364000 450000 41.275 9.44 100 101000 1.6250 7324PJDE 0 260 10.2362 0 410000 92200 520000 7000 44.450 1.7500 7326PJDE 0 5.1 20 36 6 4.5669 3.0. 4400 101000 600000 5000 47.625 1.750 732PJDE 140 5.5 300.0 4 4.319 3.0. 495000 1000 60000 3000 50.00 000 24 1) Fillet radius indicates maximum fillet radius on shaft or in housing which bearing corner will clear 2) For thrust rating multiply C by and Co by 1.93 3) Listed values are for machined brass cage. Values have been determined through historical application and practice
The MRC 7000 PJDU type bearing with a stamped brass cage is the most popular pump thrust bearing in service today. Recent trends in the petrochemical industry indicate a change to the 7000 PJDE execution with a machined brass cage. With the machined cage, and the CB clearance, the 7000 PJDE series offers an economical solution for a wide range of applications. Most pump users have found the machined cage to be more forgiving when skidding and cavitation are likely to occur. PITCH MIN. REQD. 5) THRUST FOR 5) 3) RECOMMENDED RECOMMENDED SPEED RATING SHAFT DIAMETER (k5) HOUSING DIAMETER (H6) DIAMETER THRUST LOAD 25000 HRS mm AT 3600 RPM L10 AT 3600 RPM GREASE OIL MAXIMUM MINIMUM MAXIMUM MINIMUM in N N mm mm mm mm lbf lbf RPM RPM in in in in 5.0 4.92 1930 433 100 2455 2600 3600.01 3.5440.003 3.5434 0.025 6.3002 0.000 140.0 20 5) 600 5) 2200 3200 100.01 100.003 10.025 10.000 5.5 653 3050 3.9377 3.9371 776 766 5.0 4560 5) 000 5) 10 200 0.01 0.003 200.029 200.000 624 1026 35 4.3314 4.330 7.751 7.740 7.7 540 5) 600 5) 1700 2400 0.01 0.003 2.029 2.000 6.6039 3730 4.7251 4.7245.4647.4646 57.5 2.263 147 33 330 60 6000 000 35.0 1.375 35.002 1.371 0.019 3.03 0.000 65.0 591 245 55 450 1030 5300 7000 40.0 1.5753 40.002 1.5749.022 3.5442.000 7 2.543 37 5 56 0 400 6300 45.0 1.7722 45.002 1.771 100.022 3.9379 100.000 0.5 3.93 592 3 6 50 4300 5600 50.0 1.96 50.002 1.966 0.022 4.33 0.000 7.6 3.44 10 12 7960 17 300 5000 55.0 2.60 55.002 2.55 0.022 4.7253 0.000 95.1 3.7441 10 246 9560 20 3600 400 60.0 2.362 60.002 2.3622 0.025 5.91 0.000 5.1 10 4.0354 1450 325 10700 2400 3200 4300 65.0 597 65.002 592 140.025 5.5 140.000 5.5 0.0 170 421 000 26 3000 4000 70.0 2.7565 70.002 2.7560 0.025 5.65 0.000 5.55 7.5 4.6260 2400 539 500 200 200 300 75.0 2.9534 75.002 2.9529 0.025 6.3002 0.000 5.0 4.92 3030 61 600 3050 2600 3600 0.0 3.02 0.002 3.1497 170.025 6.6939 170.000 6.6929 5.25 947 2 1400 4140 2400 3400 5.01 3.3472 5.003 3.3466 10.025 776 10.000 766 140.0 5.5 70 262 5) 19700 5) 2200 4430 3200.01 3.5440.003 3.5434 1.029 7.414 1.000 7.403 147.5 5.071 1420 320 5) 200 5) 2000 46 3000 95.01 3.7409 95.003 3.7403 200.029 7.751 200.000 7.740 7.6 6.2047 2040 45 5) 25100 5) 10 5650 200 100.01 3.9377 100.003 3.9371 2.029.4647 2.000.4646 5.0 6.4961 210 4 5) 25100 5) 100 5650 2600 105.01 4.46 105.003 4.40 225.029.594 225.000.53 175.3 6.31 2930 659 5) 2200 5) 1700 2400 0.01 0.003 240.029 240.000 6330 4.3314 4.330 9.4499 9.44 1.0 7.403 3970 93 5) 31700 5) 00 70 2200 0.01 4.7251 0.003 4.7245 260.032 10.2375 260.000 10.2362 205.0.0709 52 5) 34700 5) 00 710 2000 0.021 5.9 0.003 5.2 20.032 47 20.000 36 220.0.6614 6 50 5) 3200 5) 1400 50 10 140.021 5.56 140.003 5.59 300.032.3 300.000.0 4) Rating for one million revolutions or 500 hours at 33 1/3 RPM 5) Based on 100 RPM for 7220 PJDE through 7224 PJDE and 7317 PJDE through 732 PJDE 25
MRC Bearing Services 1-00-MRC-7000 7000 PJDU 40 angular contact bearing with stamped brass, ball centered cage; GA preload The MRC PJDU series is supplied with a stamped brass, ball-centered cage. 7000 PJDU bearings are supplied with GA preload. The GA preload results in a nominal flush condition. Call 1-00-MRC-7000 for availability and other clearance/preload executions. ABEC 3 Ball guided cages; stamped brass Special clearance, available on a made-to-order basis. GA preload Stocked as half pairs universal duplex 40 contact angle FILLET RADIUS MRC BORE OUTSIDE WIDTH 1) BASIC RADIAL LOAD RATING 2) BALLS PER ROW BEARING d DIAMETER B r a r b DYNAMIC 4) STATIC NUMBER DIAMETER NUMBER mm D mm mm mm C Co mm in mm in in in N N in in lbf lbf 721PJDU 0 60 2.3622 17000 40000 1000 42700 200 0.5 7220PJDU 100 10 766 6 2.6772 221000 49700 245000 55100 25.400 000 7222PJDU 0 200 7.740 76 2.9921 270000 60700 335000 75300 2.575 1.50 7224PJDU 0 2.4646 0 21000 63200 365000 2100 30.3 1.175 7307PJDU 35 1.370 0 42 1.6535 1.5.06 62400 14000 400 000 14.2 0.5625 730PJDU 40 1.574 46 1.0 1.5.06 400 190 64000 14400.75 0.6250 7309PJDU 45 1.7717 100 50 1.965 1.5.06 10000 24300 0000 1000 17.700 0.696 7310PJDU 50 1.965 0 54 2.60 3000 290 100000 22500 19.44 0.7 73PJDU 55 2.54 0 5 2.235 3000 34400 6000 26100 21.431 0.43 73PJDU 60 2.3622 0 5.1 62 2.4409 6000 35100 140000 300 23.019 0.63 73PJDU 65 591 140 5.5 66 94 174000 39100 0000 36000 24.606 0.96 7314PJDU 70 2.7559 0 5.55 70 2.7559 195000 4300 10000 40500 26.194 3 73PJDU 75 2.952 0 74 2.94 2000 4600 22000 500 26.9 625 73PJDU 0 170 6.6929 7 3.0709 234000 52600 260000 5500 2.575 1.50 7317PJDU 5 3.3465 10 766 2 3.223 251000 56400 2000 65200 30.2 1.175 731PJDU 1 7.403 6 3.35 270000 60700 3000 7000 31.750 1.2500 7319PJDU 95 3.7402 200 7.740 26000 64300 355000 70 33.33 1.35 7320PJDU 100 2.4646 94 3.700 345000 77600 450000 101000 37. 1.5000 7321PJDU 105 4.39 225.53 9 3.53 345000 77600 450000 101000 37. 1.5000 7322PJDU 0 240 100 364000 450000 41.275 9.44 100 101000 1.6250 7324PJDU 0 260 10.2362 0 410000 92200 520000 7000 44.450 1.750 7326PJDU 0 5.1 20 36 6 4.5669 3.0. 4400 101000 600000 5000 47.625 1.750 732PJDU 140 5.5 300.0 4 4.319 3.0. 495000 1000 60000 3000 50.00 000 26 1) Fillet radius indicates maximum fillet radius on shaft or in housing which bearing corner will clear 2) For thrust rating multiply C by and Co by 1.93 3) Listed values are for machined brass cage. Values have been determined through historical application and practice
The MRC 7000 PJDU type bearing with a stamped brass cage is the most popular pump thrust bearing in service today. Recent trends in the petrochemical industry indicate a change to the 7000 PJDE execution with a machined brass cage. With the machined cage, and the CB clearance, the 7000 PJDE series offers an economical solution for a wide range of applications. Most pump users have found the machined cage to be more forgiving when skidding and cavitation are likely to occur. 5) 5) 3) RECOMMENDED RECOMMENDED PITCH MIN. REQD. THRUST FOR SPEED RATING SHAFT DIAMETER (h5) HOUSING DIAMETER (H6) DIAMETER THRUST LOAD 25000 HRS mm AT 3600 RPM L10 AT 3600 RPM GREASE OIL MAXIMUM MINIMUM MAXIMUM MINIMUM in N N mm mm mm mm lbf lbf RPM RPM in in in in 5.0 4.92 1930 433 100 2455 2600 3600.000 9.95 3.5427 0.025 6.3002 0.000 140.0 20 5) 600 5) 100.000 99.95 10.025 10.000 5.5 653 3050 2200 3200 3.9364 776 766 5.0 460 5) 600 5) 0.000 109.95 200.029 200.000 624 1094 3730 10 200 4.3301 7.751 7.740 7.7 6230 5) 17300 5) 0.000 9.95 2.029 2.000 6.6039 1400 30 1700 2400 4.723.4647.4646 57.5 147 5) 330 5) 35.000 34.9 0.019 0.000 2.263 33 60 6000 000 1.370 1.3776 3.03 65 591 267 60 5430 20 5300 7000 40.000 1.574 39.9 1.5744.022 3.5442.000 7 2.543 4 93 6630 14 400 6300 45.000 1.7717 44.9 1.77 100.022 3.9379 100.000 0.5 3.93 645 145 10 140 4300 5600 50.000 1.965 49.9 1.961 0.022 4.33 0.000 7.6 3.44 5 199 93 20 300 5000 55.000 2.54 54.9 2.49 0.022 4.7253 0.000 95.1 3.7441 10 246 9560 20 3600 400 60.000 2.3622 59.9 2.3617 0.025 5.91 0.000 5.1 10 4.0354 1450 325 10700 2400 3200 4300 65.000 591 64.9 56 140.025 5.5 140.000 5.5 0.0 170 421 000 26 3000 4000 70.000 2.7559 69.9 2.7554 0.025 5.65 0.000 5.55 7.5 4.6260 2600 54 300 2 200 300 75.000 2.952 74.9 2.9523 0.025 6.3002 0.000 5.0 4.92 320 73 14400 3230 2600 3600 0.000 79.9 3.1491 170.025 6.6939 170.000 6.6929 1030 5) 19400 5) 5.25 231 4360 2400 3400 5.000 3.3465 4.95 3.3459 10.025 776 10.000 766 140.0 60 5) 200 5) 5.5 24 4700 2200 3200.000 9.95 3.5427 1.029 7.414 1.000 7.403 147.5 40 5) 22100 5) 5.071 347 4970 2000 3000 95.000 3.7402 94.95 3.7396 200.029 7.751 200.000 7.740 7.6 2210 5) 26700 5) 6.2047 496 6000 10 200 100.000 99.95 3.9364 2.029.4647 2.000.4646 5.0 2360 5) 26700 5) 6.4961 531 6000 100 2600 105.000 4.39 104.95 4.33 225.029.594 225.000.53 175.3 2930 5) 2200 5) 0.000 109.95 240.029 240.000 6.31 659 6330 1700 2400 4.3301 9.4499 9.44 1.0 3970 5) 31700 5) 7.403 93 70 00 2200 0.000 9.95 4.723 260.032 10.2375 260.000 10.2362 205.0 52 5) 34700 5).0709 710 00 2000 0.000 5.1 9.92 5.74 20.032 47 20.000 36 220.0 6 5) 3200 5).6614 50 50 1400 10 140.000 5.5 9.92 5.51 300.032.3 300.000.0 4) Rating for one million revolutions or 500 hours at 33 1/3 RPM 5) Based on 100 RPM for 7220 PJDU through 7224 PJDU and 7317 PJDU through 732 PJDU 27
MRC Bearing Services 1-00-MRC-7000 7000 PDU 40 angular contact ball bearing land-guided, machined bronze cage The 7000 PDU angular contact ball bearing has been traditionally supplied with the faces ground flush (GA) and used with an h5 shaft fit. When heavier interference fits are employed, a bearing with clearance (CB) may be needed. Call 1-00- MRC-7000 for assistance in selecting special clearances. Experience has shown that this bearing, with a land guided, machined cage is very forgiving when ball skidding occurs. With oil lubrication, this cage type runs cooler than most other executions. ABEC 1 Stocked with GA preload (other preloads available on request) Land-riding, machined brass cage Stocked as universally ground half pairs FILLET RADIUS 1) BASIC RADIAL LOAD RATING 2) BALLS PER ROW MRC BORE OUTSIDE WIDTH BEARING d DIAMETER B r a r b DYNAMIC 4) STATIC NUMBER DIAMETER NUMBER mm D mm mm mm C Co mm in mm in in in N N in in lbf lbf 721PDU 7220PDU 7222PDU 7224PDU 7307PDU 730PDU 7309PDU 7310PDU 73PDU 73PDU 73PDU 7314PDU 73PDU 73PDU 7317PDU 731PDU 7319PDU 7320PDU 7321PDU 7322PDU 7324PDU 7326PDU 732PDU 0 60 2.3622 17000 40000 1000 42700 23.020.63 100 10 766 6 2.6772 2000 47700 250000 56200 25.400 000 0 200 7.740 76 2.9921 251000 56400 310000 69700 2.575 1.50 0 2.4646 0 270000 60700 325000 73100 30.3 1.175 35 1.370 0 42 1.6535 1.5.06 63700 14300 400 000 10 3.593 40 1.574 46 1.0 1.5.06 76100 17100 61000 700.75.6250 45 1.7717 100 50 1.965 1.5.06 97500 210 0000 1000 1.25.71 50 1.965 0 54 2.60 1000 25200 104000 23400 19.45.7 55 2.54 0 5 2.235 0000 29200 1000 25200 21.433.43 60 2.3622 0 5.1 62 2.4409 14000 33300 00 200 23.020.63 65 591 140 5.5 66 94 5000 37100 0000 36000 24.60.96 70 2.7559 0 5.55 70 2.7559 1000 42700 000 4100 26.195 3 75 2.952 0 74 2.94 20000 4600 200000 45000 2.575 1.50 0 170 6.6929 7 3.0709 225000 50600 220000 49500 2.575 1.50 5 3.3465 10 766 2 3.223 23000 53500 245000 55100 30.3 1.175 1 7.403 6 3.35 255000 57300 270000 60700 31.750 1.2500 95 3.7402 200 7.740 276000 62000 300000 67400 33.33 1.35 100 2.4646 94 3.700 307000 600 30000 5400 37.91 1.4953 105 4.39 225.53 9 3.53 325000 73100 3000 7700 30 1.5000 0 240 9.44 100 345000 77600 455000 102000 41.275 1.6250 0 260 10.2362 0 3000 7700 530000 00 44.450 1.7500 0 5.1 20 36 6 4.5669 3.0. 4400 101000 0000 7000 47.625 1.750 140 5.5 300.0 4 4.319 3.0. 4000 0000 695000 6000 50.00 000 2 1) Fillet radius indicates maximum fillet radius on shaft or in housing which bearing corner will clear 2) For thrust rating multiply C by and Co by 1.93 3) Listed values are for machined brass cage. Values have been determined through historical application and practice
MRC 7000 PDU bearings are especially recommended for pumps, motors and other devices that generate heavy axial loads at high speeds. 7000 PDU bearings are not intended to run in pumps that generate only small or no thrust loads. See the table below for minimum thrust loads. The bearing with an aircraft-style machined bronze cage runs particularly well in applications where thrust loads vary greatly during operation and periods of ball skidding are unavoidable. Similarly, this bearing type resists destructive vibration forces when cavitation occurs. PITCH MIN. REQD. 5) THRUST FOR 5) 3) RECOMMENDED RECOMMENDED SPEED RATING SHAFT DIAMETER (h5) HOUSING DIAMETER (H6) DIAMETER THRUST LOAD 25000 HRS mm AT 3600 RPM L10 AT 3600 RPM GREASE OIL MAXIMUM MINIMUM MAXIMUM MINIMUM in N N mm mm mm mm lbf lbf RPM RPM in in in in 5.0 4.92 1930 433 100 2455 2600 3600.000 9.95 3.5427 0.025 6.3002 0.000 140.0 725 5) 400 5) 5.5 3 36 2200 3200 100.000 99.95 3.9364 10.025 776 10.000 766 5.0 40 5) 19400 5) 624 256 4360 10 200 0.000 109.95 4.3301 200.029 7.751 200.000 7.740 7.7 1460 5) 200 5) 6.6039 32 46 1700 2400 0.000 9.95 4.723 2.029.4647 2.000.4646 57.5 2.263 1 34 3910 7 6000 000 35.000 1.370 34.9 1.3776 0.019 3.03 0.000 65.0 591 222 50 4670 1050 5300 7000 40.000 1.574 39.9 1.5744.022 3.5442.000 7 2.544 37 5 5960 40 400 6300 45.000 1.7717 44.9 1.77 100.022 3.9379 100.000 0.5 3.93 472 106 6 50 4300 5600 50.000 1.965 49.9 1.961 0.022 4.33 0.000 7.6 3.44 743 7 7960 17 300 5000 55.000 2.54 54.9 2.49 0.022 4.7253 0.000 95.0 3.7402 1000 225 70 2040 3600 400 60.000 2.3622 59.9 2.3617 0.025 5.91 0.000 5.1 10 4.0355 1450 325 10100 220 3200 4300 65.000 591 64.9 56 140.025 5.5 140.000 5.5 0.0 170 421 700 2620 3000 4000 70.000 2.7559 69.9 2.7554 0.025 5.65 0.000 5.55 7.5 4.6260 2370 532 00 270 200 300 75.000 2.952 74.9 2.9523 0.025 6.3002 0.000 5.0 4.92 200 629 00 30 2600 3600 0.000 79.9 3.1491 170.025 6.6939 170.000 6.6929 71 5) 1400 5) 5.25 196 4140 2400 3400 5.000 3.3465 4.95 3.3459 10.025 776 10.000 766 140.0 100 5) 19700 5) 5.5 242 4430 2200 3200.000 9.95 3.5427 1.029 7.414 1.000 7.403 147.5 10 5) 200 5) 5.071 295 47 2000 3000 95.000 3.7402 94.95 3.7396 200.029 7.751 200.000 7.740 7.6 2040 5) 2300 5) 6.2047 45 5340 10 200 100.000 99.95 3.9364 2.029.4647 2.000.4646 5.0 210 5) 25100 5) 6.4961 4 5650 100 2600 105.000 4.39 104.95 4.33 225.029.594 225.000.53 175.3 2930 5) 26700 5) 6.31 659 6000 1700 2400 0.000 109.95 4.3301 240.029 9.4499 240.000 9.44 1.0 3 5) 30200 5) 7.403 94 670 00 2200 0.000 9.95 4.723 260.032 10.2375 260.000 10.2362 205.0 520 5) 34700 5).0709 710 00 2000 0.000 5.1 9.92 5.74 20.032 47 20.000 36 220.0 6 5) 370 5).6614 50 510 1400 10 140.000 5.5 9.92 5.51 300.032.3 300.000.0 4) Rating for one million revolutions or 500 hours at 33 1/3 RPM 5) Based on 100 RPM for 7220 PDU through 7224 PDU and 7317 PDU through 732 PDU 29
MRC Bearing Services 1-00-MRC-7000 00U and 97000U2 series 29 angular contact ball bearing/ split inner ring 00UP and 97000UP2 series 40 angular contact ball bearing/ split inner ring The feature of the MRC 00U and 00UP series angular contact ball bearings is the split inner ring that allows the assembly of an optimum ball complement while accommodating thrust in either direction. The thrust capacity in either direction is equal to the equivalent size 7000 DU or 7000 PDU bearing. ABEC 1 Split inner rings 00U 29 contact angle 00UP 40 contact angle Land-guided machined brass cage 97000 U2 97000 UP2 MRC BORE OUTSIDE WIDTH FILLET RADIUS 1) BASIC RADIAL LOAD RATING 2) BALLS PER ROW BEARING d DIAMETER B r a r b DYNAMIC 4) STATIC NUMBER DIAMETER NUMBER mm D mm mm mm C Co mm in mm in in in N N in in lbf lbf 9721U2 0 60 2.3622 1000 42700 236000 53100 22.225.750 973U2 65 591 140 5.5 66 94 17000 40000 173000 30 14 22.225.570 973U2 75 2.952 0 74 2.94 225000 50600 22000 500 14 25.400 000 97317U2 5 3.3465 10 766 2 3.223 265000 59600 25000 64100 14 2.575 1.50 97222UP2 97224UP2 97230UP2 97314UP2 9731UP2 97320UP2 0 200 7.740 76 2.9921 251000 56400 310000 69700 2.575 1.50 0 2.4646 0 270000 60700 325000 73100 30.3 1.175 0 5.55 270 10.6299 351000 70 520000 7000 36.5 1.4375 70 2.7559 0 5.55 70 2.7559 1000 42700 000 4100 26.195 3 1 7.403 6 3.35 255000 57300 270000 60700 31.750 1.2500 100 2.4646 94 3.700 307000 600 30000 5400 37.91 1.4953 30 1) Fillet radius indicates maximum fillet radius on shaft or in housing which bearing corner will clear 2) For thrust rating of 97000 U2 series, multiply C by 1.32 and Co by 2.94 For thrust rating of 97000 UP2 series, multiply C by 1.76 and Co by 3.6 For thrust rating of 00 U and 00 UP, multiply C by 0.62 and Co by 0.50
The split inner ring bearing can be matched in tandem with a single 7000 or 7000P series type bearing with the same contact angle. This configuration yields two bearing shared thrust capacity in one direction and one bearing thrust capacity in the opposite direction. The spilt inner ring bearing is usually paired with a 7000 series bearing for use in pumps or motors as a 97000U2 or 97000UP2 set. The letter P identifies the bearing or set as having a 40 contact angle. This bearing set is commonly used in vertical motors or pumps to handle the primary thrust load. Because two bearings acting in tandem share the thrust load, this solution offers extremely high thrust carrying capacity. Reversing thrust load can be accommodated on the back side of the split inner ring bearing. 97000 U2 (29 set) consists of 1 00UDT and 1 7000 DT 97000 UP2 (40 set) consists of 1 00UPDT and 1 7000 PDT Another common application of this bearing system is stirrer motors for ethylene reactors. In this application, the bearing depends upon the reactor s plasma for lubrication. MRC offers a variety of materials and cage designs to provide optimum service life with marginal lubrication. For proper mounting orientation, refer to stuffer provided in bearing box See appropriate 7000 & 7000P sections for performance data. PITCH MIN. REQD. 5) THRUST FOR 5) 3) RECOMMENDED RECOMMENDED SPEED RATING SHAFT DIAMETER (k5) HOUSING DIAMETER (H6) DIAMETER THRUST LOAD 25000 HRS mm AT 3600 RPM L10 AT 3600 RPM GREASE OIL MAXIMUM MINIMUM MAXIMUM MINIMUM in N N mm mm mm mm lbf lbf RPM RPM in in in in 5.0 4.92 2460 554 14300 3210 20 300.01 3.5440.003 3.5434 0.025 6.3002 0.000 103.0 4.0557 0 37 400 3010 3700 400 65.0 597 65.002 592 140.025 5.5 140.000 5.5.1 4.6491 270 646 0 300 3100 4000 75.0 2.9534 75.002 2.9529 0.025 6.3002 0.000 3.2 5.2427 4630 1040 190 440 200 3600 5.01 3.3472 5.003 3.3466 10.025 776 10.000 766 5.0 220 5) 300 5) 0.01 0.003 200.029 200.000 624 5 700 10 200 4.3314 4.330 7.751 7.740 7.7 2920 5) 330 5) 0.01 0.003 2.029 2.000 6.6039 656 7620 1700 2400 4.7251 4.7245.4657.4646 210.0 6 5) 40 5) 0.021 0.003 270.033 270.000.2677 70 000 00 2000 5.63 5.56 10.63 10.6299 0.0 3750 10 70.0 70.002 0.025 0.000 42 4260 3000 4000 2.7565 2.7560 5.65 5.55 140.0 20 5) 32000 5).01.003 1.029 1.000 5.5 44 7200 2200 3200 3.5440 3.5434 7.414 7.403 7.6 4070 5) 3600 5) 100.01 100.003 2.029 2.000 6.2047 9 670 10 200 3.9377 3.9371.4657.4646 3) Listed values are for machined brass cage. Values have been determined through historical application and practice 4) Rating for one million revolutions or 500 hours at 33 1/3 RPM 5) Based on 100 RPM for 97222 UP2 through 97230 UP2 and 9731 UP2 through 97320 UP2 31
32 Notes
Notes 33
34 Notes
MRC Bearing Services Warehouse Locations MRC Hebron (Cincinnati) Central Warehouse 2030 Meridian Place Hebron, KY 4104 Atlanta, GA 30336 60-A Wharton Circle SW MRC Bearing Services 3 North Main Street Jamestown, NY 14701 1-00-MRC-7000 Bellmawr, NJ 0031 0-B Benigno Boulevard (Chicago) Schaumburg, IL 60173 710 East State Parkway Dallas, TX 7522 656 International Parkway (Los Angeles) Compton, CA 224 700 West Artesia Boulevard Reno, NV 9502 300 Edison Way MRC and PumPac are registered trademarks of SKF USA Inc. Publication M230-710 Although care has been taken to assure the accuracy of the data compiled in this publication, SKF does not assume any liability for errors or omissions. 1996 SKF USA Inc. M (3/96) Printed in USA