BNR/BER ROBUST Series High-Speed Precision Angular Contact Ball Bearings for Machine Tool Spindles

BNR/BER ROBUST Series High-Speed Precision Angular Contact Ball Bearings for Machine Tool Spindles Temperature tolerance and low heat generation Smooth running even during rapid acceleration Higher speed and longer life

Features Bearing features indispensable to motorized main spindles temperature tolerance, seizure resistance and low heat generation have been improved to enable higher speeds with minimal thermal deformation. A major trend in the machine tool industry is for higher maximum spindle speeds. In addition, machines are being required to perform a wider variety of tasks and undergo frequent tool changes. Under such conditions, excellent high-speed performance is imperative and spindles must accelerate and decelerate faster. During periods of rapid acceleration or deceleration, spindle bearings are subjected to severe thermal load conditions. These conditions are caused by drastic changes in the ambient environment that result from heat generated by the motor, housing cooling and other factors. Performing well under such conditions and being capable of higher speeds than conventional precision bearings, the ROBUST Series bearings provide solutions for high-speed spindles of the st century. S type (balls and rings: bearing steel) H type (balls: silicon nitride, Si 3 N 4 /rings: bearing steel) These bearings are designed for motorized and non-motorized spindles and feature the optimal internal structure for minimizing heat generation and improving seizure resistance. The H type can be lubricated with grease at speeds where conventional bearings require Oil-Air lubrication. Additionally, both the S type and H type are capable of speeds 0% higher than conventional precision angular contact ball bearings. X type (balls: silicon nitride, Si 3 N 4 /rings: SHX steel) While this hybrid ceramic bearing has the same design as the S and H types, its rings are made of SHX steel, a new steel developed by NSK. SHX has excellent seizure and wear resistance during critical lubrication shortages. Also, its heat resistance is nearly equal to M steel, which is widely used in bearings for jet aircraft engines. With the X type, grease lubrication is feasible at even higher speeds than the H type. In terms of both surface and subsurface fatigue, SHX steel provides longer life. XE type (balls: silicon nitride, Si 3 N 4 /rings: SHX steel/spinshot Technology) XE bearings have the same specifications as the X type, but employ NSK s exclusive Spinshot lubrication system. While previously only oil jet lubrication has been feasible at speeds exceeding,000,000 dmn, the Spinshot lubrication system utilizes a mixture of oil and air to enable the XE type to sustain such speeds. The use of Oil-Air instead of oil jets reduces overall costs by allowing the structure of the spindle to be simplified and cutting down on the consumption of oil, an added environmental benefit. * Please note that the XE type is not dimensionally interchangeable with conventional precision angular contact ball bearings.

BNR/BER ROBUST Series High performance X XE Spinshot XE Type Suitable for silent operation due to reduced air-noise achieved through Oil-Air lubrication design. Material of Inner/Outer Rings: Special High speed Steel SHX Ceramic balls Cage selection based on speed requirements Outer Ring Guided Phenolic cage: up to.5 million d m n.; Outer Ring Guided PEEK cage: over.5 million d m n. ROBUST Series X Type High performance bearings demonstrating high wear and seizure resistance at ultra high speed operation. Material of Inner/Outer Rings: Special High speed Steel SHX Ceramic balls Outer Ring Guided Phenolic cage H ROBUST Series H Type High performance bearings that combine high speed operation with low heat generation. Material of Inner/Outer Rings: SUJ Ceramic balls Cage selection based on speed requirement Ball Guided Polyamide cage: up to.4 million d m n.; Outer Ring Guided Phenolic cage: over.4 million d m n. S ROBUST Series S Type Steel ball bearings for optimal cost. Material of Inner/Outer Rings: SUJ Steel balls Cage selection based on speed requirement Ball Guided Polyamide cage: up to.4 million d m n.; Outer Ring Guided Phenolic cage: over.4 million d m n. High speed

NSK s Metallurgical Technology and Optimal Design Features of SHX material SHX has similar heat-resistant performance to M, which is used in bearings for jet engines and can operate at temperatures up to 300 C. However, SHX steel provides even better wear and seizure resistance and longer life than M. SHX is the most suitable material for high-speed bearings with EHL lubrication, such as oil-air lubrication or grease lubrication. These conditions are typical of main shaft spindles in machine tools. Bearing fatigue life test PV value, kgf/mm m/s,600,00 800 400 SAE 500 Cumulative failure probability, % Seizure resistance (4-ball test) 99.9 99 SHX SAE5 Clean lubrication Test Conditions Bearing: 606 Load condition, 0 P/C: 5 Temperature: 60 C Rotation: 40 min - Oil film parameter (Λ): 5 0 0 0 3 0 4 Life, h M SHX Material 4-ball test Load Driven ball Fixed balls Features of Optimal Internal Design Today, machining involves various cutting conditions within a wide range of speeds. Consequently, spindle temperatures vary widely and cause changes in internal bearing load. The unique design of the ROBUST Series bearings minimizes the adverse effect temperature variation has on internal bearing load. To ensure the accuracy of spindles by minimizing thermal displacement, suppression of bearing dynamic frictional loss is vital. The ROBUST series design controls dynamic frictional loss, reducing heat generation by approximately 0% when compared to conventional bearings at the same speed. 40 30 0 0 Temperature rise of outer ring- Measured values (bore diameter: 65 mm; grease lubrication) Conventional bearings ROBUST Series 0 0 5 0 5 0 Speed, rpm ( 0 3 ) Improvement of cleanliness Special melting VIM-VAR for aircraft and high-reliability use M High clean SU EP Stee (ISD+SN Used f TAC se Features of ceramic ball angular contact ball bearings Limiting speed is 0% to % higher than steel ball bearings. 40% lower density than steel balls provides lower centrifugal force. Ceramic balls provide reduced operating preload due to lower thermal expansion and less ball slipping. Ceramic balls are % more rigid than steel balls, which provides high-rigidity for main shaft bearings. NSK s improved ceramic ball material provides high-accuracy. Temperature rise, C 60 40 30 0 0 Test conditions Grease lubrication (Isoflex NBU5) Preload: 96N Bearing= Bore: 65mm Outer diameter: 00mm 0 0 3 Ceramic balls Steel balls 6 9 5 6 min - ( 000) Speed 0 40 60 d n 80 00 0 0 4 m Temperature rise of angular contact ceramic ball bearings 3

Long Fatigue BNR/BER ROBUST Series Subsurface type fatigue Clean lubricating environment Surface type Contaminated lubricating environment terial Heat treatment Case hardening steel Sealing technology liness Special heat treatment Control of retained Austenite JZ Mass produced steel Nitrogen reinforced solid and melting properties UR treatment Tough against contaminants TF bearings Sealed-Clean bearings for transmissions Sealed-Clean tapered and spherical roller bearings for steel mills NSK standard material l RP) SHX New Tough bearings (NTF) High Tough bearings (HTF) Super Tough bearings (STF) or B/S ries Used for ROBUST series Features of TYN Cage Ball guided polyamide cage reinforced with glass fiber. Better for keeping grease on the outer ring due to space between the cage and outer ring. Low temperature rise (up to.4 million d mn). Noise reduction (under grease lubrication). Potential for reduced run-in procedure time (under grease lubrication). Features of T Cage Phenolic material and design provide stable operation at high speeds (higher than.4 million d mn). For Oil-Air and oil-mist lubrication, an outer ring guided cage enables better oil flow. 4

High Speed Precision Angular Contact Ball Bearings Limiting Speed The limiting speeds listed in the Bearing Dimensional Tables are guideline values. They are based on a single bearing that is lightly preloaded by means of a spring and subjected to relatively light loads with good heat dissipation. The limiting speeds with grease lubrication are determined using high-quality grease in appropriate amounts. Those listed for oil lubrication are based on the use of Oil-Air (or oil mist) lubrication. Note: When single bearings are used in duplex, triplex, and quad combinations, or the preload is increased to improve spindle rigidity, limiting speeds will be lower than those listed. Speed Factors ( ) The limiting speed of a matched bearing set operating under position preload conditions is calculated by multiplying the limiting speed of a single bearing in the set by the appropriate adjustment factor listed in the table below. Sample Calculation A customer wants to use 70BNR0HTDBBP4Y (a quad set) at the spindle s tool-side, greased bearings, at 000 rpm. What is the approximate maximum limiting speed for the bearing set with light preload? Obtain the single bearing maximum speed (0000 rpm) for grease from the bearing tables, page 3. Calculate the approximate maximum limiting speed for the DBB set with light preload using the speed factor (5) from the table above, by multiplying the single bearing speed times the speed factor: 0000 x 5 = 00 rpm. Since the customer s spindle speed, 000 rpm, is below the allowable 00 rpm, the customer s choice of bearing and preload appears appropriate. Factors that Change Preload Preload Increase Due to Deformation of Inner Ring Spacer Caused by Nut Clamping Force Preload Increase Due to Centrifugal Force on Balls Preload Increase Due to Inner/Outer Ring Temperature Difference Preload Change Due to Heat Expansion of Balls Initial Preload of Axial Clearance 3 Preload After Mounting Necessary preload force for cutting in low speed Target K A 00N/µm (K A : Axial Stiffness) Proper Preload to Ensure High-Speed Operation Stability in High Speed P x V Criteria P: Contact Pressure Between Balls and Raceway V: Gyro Slip + Spin Slip Velocity Fatigue Life Preload Increase Due to Interference Fits Between Inner Ring and Shaft Preload Increase Due to Expansion of Inner Ring Raceway Due to Centrifugal Force Preload Decrease Due to Deformation of Outer Ring Spacer Due to Compression by Front Cover Preload Decrease Due to a Decrease of Interference Fits by Expansion of Inner Ring and Shaft due to Centrifugal Force ( ) CAUTION: Preload means the preload values after the bearing has been mounted on the spindle. These after mounted pre-load values will change as a result of the shaft fit requirement of high speed operation and spacer deformation due to nut clamping force. In such case, particular in high speed applications, it is necessary to adjust the spacer lengths relative to each other in order to compensate for the changes in preload after bearing mounting. Consult NSK for guidance. 5

BNR/BER ROBUST Series Fitting of Bearings The recommended fits under normal operating conditions (inner ring rotation) for machine-tool spindles are shown in the tables below. FITS ( ) ON SHAFTS Bearing Type Shaft O.D. Shaft O.D. ( ) Tolerance Target Interference ( )( 3 ) over incl minimum maximum minimum maximum Main Spindle Bearings 0 8-0.003 0 0 0.00 T 8-0.004 0 0 0.005 T 80-0.005 0 0 0.003 T 80 0-0.003 0.003 0 0.004 T 0 80-0.004 0.004 0 0.004 T 80-0.005 0.005 0 0.005 T FITS ( ) ON HOUSING Bearing Type Housing Bore Housing Bore ( ) Tolerance Target Interference ( )( 3 ) over incl minimum maximum minimum maximum Angular Contact Ball 8-0.00 0.00 0.00 L 0.006 L Bearing (Fixed side) 80-0.005 0.005 0.00 L 0.006 L 80 0-0.003 0.003 0.003 L 0.008 L 0 80-0.004 0.004 0.003 L 0.008 L 80-0.005 0.005 0.005 L 0.00 L Angular Contact Ball 8 0 0.004 0.006 L 0.0 L Bearing (Free side) 80 0 0.005 0.006 L 0.0 L 80 0 0 0.006 0.009 L 0.05 L 0 80 0 0.008 0.009 L 0.05 L 80 0 0.00 0.05 L 0.0 L Notes ( ) The fits data above are general recommendations for machine tool spindles operating under normal conditions (inner ring rotation), and for d m n values less than 800,000. Where d m n = {[(Bearing ID+OD)/]* RPM}. For high-speeds, high loads, or outer ring rotation, consult NSK for fit recommendations. ( ) Use Target Interference when the bearings can be matched to the shaft or housing. Otherwise use Shaft OD and Housing Bore min. & max. for random matching. ( 3 ) T=Interference of tight fit; L=Clearance or loose fit. Spindle Bearing Arrangement Front Cover Outer Spacer Inner Spacer Threaded Nut Housing Shaft 6

High Speed Precision Angular Contact Ball Bearings BNR9S, BNR9H, BNR9X Series Preloads and Axial Rigidity for Duplex Bearings Bearing bore diameter BNR9S (8, steel ball) Preload Axial Rigidity Preload Axial Rigidity Preload Axial Rigidity (N) (N/µm) (N) (N/µm) (N) (N/µm) Calculation of Radial Rigidity For duplex pairs, multiply the value of axial rigidity by the factor in TABLE A. TABLE A 8 4.5 5 BNR9H, BNR9X (8, ceramic ball) Preload Axial Rigidity Preload Axial Rigidity Preload Axial Rigidity (N) (N/µm) (N) (N/µm) (N) (N/µm) 5 5 6 94 43 88 57 5 9 05 5 0 67 30 36 00 48 00 63 40 0 0 7 35 37 40 80 73 4 64 300 83 40 38 40 57 80 74 4 60 66 30 87 45 4 6 300 8 45 70 7 340 95 44 60 68 30 89 49 80 78 360 03 46 70 7 340 94 5 80 8 360 06 60 47 70 74 340 97 5 85 380 65 80 79 360 04 00 9 400 0 70 80 80 360 04 56 00 9 400 0 75 5 80 83 460 7 58 00 96 37 80 53 86 474 59 0 99 54 4 85 54 88 646 38 6 0 00 744 6 00 75 80 0 709 54 00 83 30 30 804 80 95 00 76 0 768 63 00 85 30 30 873 00 00 7 330 0 87 6 00 8 360 30 994 88 05 00 74 330 0 898 66 00 83 370 30 06 94 0 00 76 400 30 95 7 00 85 4 058 0 0 00 78 40 30 75 98 00 87 460 469 33 30 00 80 7 60 408 09 00 809 58 65 45 40 00 8 73 60 8 0 00 9 833 95 744 59 00 0 930 85 894 4 00 0 040 4 66 84 Calculation for Multiple Bearing Sets For triplex or quad sets, multiply the value of preload or axial rigidity for duplex pairs by the factor in TABLE B. For radial rigidity of triplex or quad sets, first multiply the value of axial rigidity for duplex pairs by the factor in TABLE A. Then multiply this value by the factor in TABLE B. BER9S, BER9H, BER9X Series Bearing bore diameter BER9S (5, steel ball) Preload Axial Rigidity Preload Axial Rigidity Preload Axial Rigidity (N) (N/µm) (N) (N/µm) (N) (N/µm) TABLE B DBD DBB Preload.36 Axial Rigidity.48 Radial Rigidity.54 BER9H, BER9X (5, ceramic ball) Preload Axial Rigidity Preload Axial Rigidity Preload Axial Rigidity (N) (N/µm) (N) (N/µm) (N) (N/µm) 5 5 4 80 300 05 5 47 96 34 4 30 58 60 30 6 65 80 00 360 34 35 6 0 00 40 3 68 40 0 480 53 40 63 0 0 440 37 70 0 0 60 45 67 40 0 480 5 75 60 40 50 74 7 30 0 64 80 80 560 75 60 40 50 74 84 300 60 600 03 60 78 70 40 540 8 87 300 60 600 09 65 8 580 96 9 30 80 640 5 70 83 598 98 93 330 80 689 33 75 86 300 60 69 06 96 340 73 43 80 88 30 70 639 4 98 3 738 5 85 30 70 889 45 00 360 00 03 00 0 430 0 968 73 00 40 480 40 0 3 95 00 30 440 0 996 8 00 40 4 43 33 00 00 0 50 0 3 79 00 30 580 30 38 05 00 0 530 0 69 00 40 600 60 46 34 0 00 30 5 30 06 30 00 40 60 60 3 354 0 00 30 680 743 35 00 780 300 03 44 30 00 35 97 89 880 368 00 5 340 85 434 40 00 35 00 300 944 38 00 5 353 6 4 00 75 308 336 5 48 00 98 484 393 948 4 7

BNR/BER ROBUST Series BNR0S, BNR0H, BNR0X Series Preloads and Axial Rigidity for Duplex Bearings Bearing bore diameter BNR0S (8, steel ball) Preload Axial Rigidity Preload Axial Rigidity Preload Axial Rigidity (N) (N/µm) (N) (N/µm) (N) (N/µm) Calculation of Radial Rigidity For duplex pairs, multiply the value of axial rigidity by the factor in TABLE A. TABLE A 8 4.5 5 BNR0H, BNR0X (8, ceramic ball) Preload Axial Rigidity Preload Axial Rigidity Preload Axial Rigidity (N) (N/µm) (N) (N/µm) (N) (N/µm) 30 39 0 5 0 69 43 0 59 0 79 35 4 0 0 73 46 0 63 40 83 40 44 0 60 0 77 49 0 68 40 88 45 44 0 60 0 77 49 0 69 40 88 47 0 64 49 85 5 30 73 79 99 48 0 67 30 95 54 30 76 34 0 60 5 30 7 345 04 57 40 8 39 65 53 30 75 364 60 40 87 43 30 70 53 30 93 5 5 59 60 0 578 47 75 54 40 96 50 9 6 70 0 597 5 80 00 7 330 0 606 4 00 80 360 30 684 64 85 00 73 330 0 6 45 00 8 370 30 703 69 00 74 340 0 83 63 00 83 370 30 938 9 95 00 76 3 0 846 68 00 85 380 40 965 97 00 00 78 3 0 870 74 00 87 3 40 993 04 05 00 80 40 30 054 95 00 89 470 60 09 9 0 00 8 540 44 00 00 9 600 70 35 35 0 00 85 560 60 08 3 00 95 630 80 39 30 00 85 73 66 8 0 00 95 833 95 745 60 40 00 05 775 78 606 36 00 5 860 06 89 76 00 0 96 97 53 00 5 05 94 97 Calculation for Multiple Bearing Sets For triplex or quad sets, multiply the value of preload or axial rigidity for duplex pairs by the factor in TABLE B. For radial rigidity of triplex or quad sets, first multiply the value of axial rigidity for duplex pairs by the factor in TABLE A. Then multiply this value by the factor in TABLE B. BER0S, BER0H, BER0X Series Bearing bore diameter BER0S (5, steel ball) Preload Axial Rigidity Preload Axial Rigidity Preload Axial Rigidity (N) (N/µm) (N) (N/µm) (N) (N/µm) TABLE B DBD DBB Preload.36 Axial Rigidity.48 Radial Rigidity.54 BER0H, BER0X (5, ceramic ball) Preload Axial Rigidity Preload Axial Rigidity Preload Axial Rigidity (N) (N/µm) (N) (N/µm) (N) (N/µm) 30 63 0 0 440 40 7 30 0 63 35 67 40 0 480 53 75 60 40 50 75 40 7 30 0 65 80 80 560 9 45 73 30 0 66 8 80 560 9 77 70 40 540 80 86 300 60 600 08 80 3 60 700 05 89 400 800 40 60 84 380 70 760 94 430 00 860 60 65 88 400 80 800 35 99 4 0 0 75 70 88 400 80 800 35 98 4 0 0 75 75 00 00 63 00 580 40 60 306 80 00 0 60 0 40 00 30 700 60 400 336 85 00 0 640 30 80 300 00 30 70 70 440 347 00 0 6 40 300 305 00 40 740 80 480 3 95 00 30 670 40 340 36 00 40 760 50 367 00 00 30 6 380 37 00 780 300 560 38 05 00 30 80 369 00 040 330 080 430 0 00 30 930 860 379 00 060 340 0 440 0 00 40 980 30 960 403 00 60 0 370 40 469 30 00 40 00 30 004 389 00 60 370 30 469 40 00 80 098 35 96 4 00 00 40 380 476 489 00 80 74 345 56 444 00 00 444 403 957 8

Tolerances and Permissible Values for Angular Contact Ball Bearings Inner Rings (Class 4) Units : µm V dp Bs d dmp ds V dmp K ia S d S ia V Diameter Series Combined Combined Bs Single Brg 9 0& Single Brgs Brgs () over incl high low high low max max max max max high low max.5 0 0 4 0 4 4 3.5 3 3 0 40.5 0 8 0 4 0 4 4 3.5 3 3 0 80.5 8 30 0 5 0 5 5 4.5 3 4 4 0 0.5 30 0 6 0 6 6 5 3 4 4 4 0 0 3 80 0 7 0 7 7 5 3.5 4 5 5 0 4 80 0 0 8 0 8 8 6 4 5 5 5 0 00 380 4 0 80 0 0 0 0 0 8 5 6 6 7 0 380 5 80 0 0 9 6 8 7 8 0 300 0 6 Inner Rings (Class 4Y) () Units : µm V dp Bs d dmp ds V dmp K ia S d S ia V Diameter Series Combined Bs Single Brg Combined 9 0& Single Brgs Brgs () over incl high low high low max max max max max high low max 30 3 3 6 5 3 4 4 4 0 0 3 80 5 5 7 5 3.5 4 5 5 0 4 80 0 3 6 3 6 8 6 4 5 5 5 0 00 380 4 0 3 7 3 7 0 8 5 6 6 7 0 380 5 Inner Rings (Special Class 3) (3) Units : µm Bs d dmp ds V dp V dmp K ia S d S ia Combined V Combined Bs Single Brg Single Brgs Brgs () over incl high low high low max max max max max high low max.5 0 0 4 0 4.5.5.5.5.5 0 40.5 0 8 0 4 0 4.5.5.5.5.5 0 80.5 8 30 0 5 0 5.5.5.5.5.5 0 0.5 30 0 6 0 6.5.5.5.5.5 0 0.5 80 0 7 0 7 4.5.5.5 0.5 80 0 0 8 0 8 5.5.5.5.5 0 00 380.5 0 0 0 0 0 7 3.5.5.5.5 0 380.5 80 0 0 0 0 7 3.5 5 4 5 0 380 4 80 0 0 8 4 5 5 5 0 300 0 5 Inner Rings (Class ) Units : µm Bs d dmp ds V dp V dmp K ia S d S ia Combined V Combined Bs Single Brg Single Brgs Brgs () over incl high low high low max max max max max high low max.5 0 0.5 0.5.5.5.5.5.5 0 40.5 0 8 0.5 0.5.5.5.5.5.5 0 80.5 8 30 0.5 0.5.5.5.5.5.5 0 0.5 30 0.5 0.5.5.5.5.5.5 0 0.5 80 0 4 0 4 4.5.5.5 0.5 80 0 0 5 0 5 5.5.5.5.5 0 00 380.5 0 0 7 0 7 7 3.5.5.5.5 0 380.5 80 0 7 0 7 7 3.5 5 4 5 0 300 380 4 80 0 8 0 8 8 4 5 5 5 0 3 0 5 9 Notes ( ) Applicable to single bearings manufactured for combined bearings. ( ) Class P4Y is an NSK standard with tolerances tighter than class 4. ( 3 ) Class P3 is an NSK standard. Dimensional tolerances are class P4 and running accuracies are Class P. Remarks. The high tolerances for the bores of cylindrical-bore bearings and the low tolerances for the outside diameter are not applicable within a distance of. times the chamfer dimension r (max.) from the side of a ring.. The tolerances and permissible values of ABMA Standard, ABEC 7 and 9 are identical to JIS (ISO) Classes 4 and respectively. The ABMA standard is applicable to angular contact ball bearings. Dimensional tolerances are class P4 and running.

BNR/BER ROBUST Series Outer Rings (Class 4) Units : µm V Dp D Dmp Ds Diameter Series V Dmp K ea S D S ea Cs V Cs 9 0& over incl high low high low max max max max max max 6 8 0 4 0 4 4 3 3 4 5.5 8 30 0 5 0 5 5 4.5 4 4 5.5 30 0 6 0 6 6 5 3 5 4 5 Same as the value.5 80 0 7 0 7 7 5 3.5 5 4 5 of Bs for the 3 80 0 0 8 0 8 8 6 4 6 5 6 inner ring of the 4 same bearing. 0 0 9 0 9 9 7 5 7 5 7 5 80 0 0 0 0 0 8 5 8 5 8 5 80 0 0 8 6 0 7 0 7 35 0 3 0 3 3 0 7 8 0 7 35 400 0 5 0 5 5 8 3 0 3 8 Outer Rings (Special Class 4Y) () Units : µm V Dp D Dmp Ds Diameter Series V Dmp K ea S D S ea Cs V Cs 9 0& over incl high low high low max max max max max max 80 6 6 7 5 3.5 5 4 5 3 80 0 6 6 8 6 4 6 5 6 4 Same as the value 0 3 7 3 7 9 7 5 7 5 7 of Bs for the 5 80 3 7 3 7 0 8 5 8 5 8 inner ring of the 5 80 00 4 9 4 9 8 6 0 7 0 same bearing. 7 00 ~5 9 9 8 6 0 7 0 7 Outer Rings (Special Class 3) (3) Units : µm D Dmp Ds V Dp V Dmp K ea S D S ea Cs V Cs over incl high low high low max max max max max max 6 8 0 4 0 4.5.5.5.5.5.5 8 30 0 5 0 5 4.5.5.5.5 30 0 6 0 6 4.5.5.5 Same as the value.5 80 0 7 0 7 4 4.5 4 of Bs for the.5 80 0 0 8 0 8 5.5 5.5 5 inner ring of the.5 same bearing. 0 0 9 0 9 5.5 5.5 5.5 80 0 0 0 0 7 3.5 5.5 5.5 80 0 0 8 4 7 4 7 4 35 0 3 0 3 8 4 7 5 7 5 35 400 0 5 0 5 0 5 8 7 8 7 Outer Rings (Class ) Units : µm D Dmp Ds V Dp V Dmp K ea S D S ea Cs V Cs over incl high low high low max max max max max max 6 8 0.5 0.5.5.5.5.5.5.5 8 30 0 4 0 4 4.5.5.5.5 30 0 4 0 4 4.5.5.5 Same as the value.5 80 0 4 0 4 4 4.5 4 of Bs for the.5 80 0 0 5 0 5 5.5 5.5 5 inner ring of the.5 same bearing. 0 0 5 0 5 5.5 5.5 5.5 80 0 7 0 7 7 3.5 5.5 5.5 80 0 8 0 8 8 4 7 4 7 4 35 0 8 0 8 8 4 7 5 7 5 35 400 0 0 0 0 0 5 8 7 8 7 0

High Speed Precision Angular Contact Ball Bearings Bearing Number 5BNR9S 5BNR9H 5BNR9X 30BNR9S 30BNR9H 30BNR9X 35BNR9S 35BNR9H 35BNR9X 40BNR9S 40BNR9H 40BNR9X 45BNR9S 45BNR9H 45BNR9X BNR9S BNR9H BNR9X BNR9S BNR9H BNR9X 60BNR9S 60BNR9H 60BNR9X 65BNR9S 65BNR9H 65BNR9X 70BNR9S 70BNR9H 70BNR9X 75BNR9S 75BNR9H 75BNR9X 80BNR9S 80BNR9H 80BNR9X 85BNR9S 85BNR9H 85BNR9X BNR9S BNR9H BNR9X 95BNR9S 95BNR9H 95BNR9X 00BNR9S 00BNR9H 00BNR9X 05BNR9S 05BNR9H 05BNR9X 0BNR9S 0BNR9H 0BNR9X 0BNR9S 0BNR9H 0BNR9X Grease 4800 53800 6700 36400 46800 54600 300 40000 46700 70 35300 400 4800 30 3700 3000 9600 340 0800 6700 300 9400 40 00 800 3300 700 60 00 4800 5600 0000 3400 4800 00 00 3700 7600 00 300 6800 9600 0 6000 8700 700 00 70 00 4400 6800 0800 30 600 90 700 4800 Oil-Air 59800 83600 98600 5000 7800 85800 440 6300 73400 39300 500 64800 35400 49600 580 3800 46000 5400 9700 40 480 7600 38700 45600 50 3600 4600 3600 33000 380 300 300 36700 00 34800 9600 7400 300 8700 600 30700 7800 40 9400 6700 3400 70 6000 400 6400 5400 600 5400 400 9700 300 approx. 0.04 0.038 0.038 0.048 0.043 0.043 0.07 0.063 0.063 0.05 0.09 0.09 0.5 0. 0. 0.7 0. 0. 8 8 8 0. 0 0 0.04 0.8 0.8 8 0.9 0.9 48 0 0 66 6 6 7 0.456 0.456 5 0.480 0.480 7 0.497 0.497 70 73 73 95 93 93 0.838 33 33.40 0.949 0.949 Boundary Dimensions Limiting Speed (rpm) Nozzle Aim Point Effective Load Centers Abutment Fillet Dimensions Mass (kg) Basic Load Ratings (N) d 5 30 35 40 45 60 65 70 75 80 85 95 00 05 0 0 D 4 47 6 68 7 80 85 00 05 0 0 5 30 40 45 65 B 9 9 0 3 3 3 6 6 6 8 8 8 0 0 0 r....... r Cr 5.95 6 0 0 00 800 4400 4600 500 300 600 000 9400 30 3000 38000 380 300 54000 C 0r 3.5 40 6000 76 8700 97 400 000 300 800 00 90 6300 9700 3000 300 360 38000 5000 Diameter (A) 3 35 4 48 53 57.5 63.5 68.5 73.5 8 85 9 98.5 0 07 3.5 9 4 36 Distance (b) a 9.9 0.8.3 4.3 5. 5.9 7.5 8.3 9..8.6 3.4 5.7 6.5 8.3 9.5 3.5 3. 34. Recommended Grease Quantity () (cc/row) 0.7 0.48 5 0.83 0.9...3..3.4 3.5 3.6 3.6 4.9 5. 5. 7.9 d a 7.5 3.5 40 45 6 66 7 76 8 86 9 97 0 07 7 7 D a (max) 39.5 44.5 57 63 67 74 79 84 94 99 04 3 8 3 33 38 43 58 r a (max) ISO 9 series, 8 Contact Angle BNR9S, BNR9H, BNR9X ( ) NSK recommends a 5% grease fill. The values provided reflect this recommendation.

BNR/BER ROBUST Series BER9S, BER9H, BER9X rb ra Dynamic Equivalent Load P = XFr + YFa Single, DT DB or DT Nominal Cor* Contact e Fa/Fr e Fa/Fr>e Fa/Fr e Fa/Fr>e Angle ifa X Y X Y X Y X Y 8 7 0 0.43.09 0.63 Db φ da φ 5 8 0 0.4 0.87 0.9 7.4 *For i, use for DB and DF and for DT. ISO 9 series, 5 Contact Angle Static Equivalent Load Nominal Single, DT DB or DF Contact Angle X0 Y0 X0 Y0 8 0.4 0.84 5 8 6 P0 = X0Fr + Y0Fa Single or DT mounting when Fr>F + Y0Fa use P0 = Fr Bearing Number d Boundary Dimensions D B r r Basic Load Ratings (N) Cr C 0r Limiting Speed (rpm) Grease Oil-Air Nozzle Aim Point Diameter (A) Distance (b) Recommended Grease Quantity () (cc/row) Effective Load Centers a Abutment Fillet Dimensions d a D a (max) r a (max) Mass (kg) approx. 5BER9S 5BER9H 5BER9X 30BER9S 30BER9H 30BER9X 35BER9S 35BER9H 35BER9X 40BER9S 40BER9H 40BER9X 45BER9S 45BER9H 45BER9X BER9S BER9H BER9X BER9S BER9H BER9X 60BER9S 60BER9H 60BER9X 65BER9S 65BER9H 65BER9X 70BER9S 70BER9H 70BER9X 75BER9S 75BER9H 75BER9X 80BER9S 80BER9H 80BER9X 85BER9S 85BER9H 85BER9X BER9S BER9H BER9X 95BER9S 95BER9H 95BER9X 00BER9S 00BER9H 00BER9X 05BER9S 05BER9H 05BER9X 0BER9S 0BER9H 0BER9X 0BER9S 0BER9H 0BER9X 5 30 35 40 45 60 65 70 75 80 85 95 00 05 0 0 4 47 6 68 7 80 85 00 05 0 0 5 30 40 45 65 9 9 0 3 3 3 6 6 6 8 8 8 0 0 0....... 5.7 6000 8800 000 600 300 3800 4000 40 0400 0700 000 800 30000 300 36000 37000 370 50 3.4 30 57 73 83 93 00 0 600 7300 800 0 500 80 9700 330 300 360 000 350 47800 56800 300 4600 49400 6700 35600 4300 3600 3400 37300 300 8400 33700 9700 6300 300 7800 3800 800 6600 00 6300 50 0700 4600 400 80 400 3400 7800 00 700 60 0000 800 5700 8600 00 40 7700 0700 4300 60 0000 3400 50 9600 800 500 9300 400 4700 80 300 3400 58000 74700 89600 4400 600 78000 37800 600 66700 33400 40 580 3000 44300 5300 70 4000 40 500 3700 440 30 340 4400 000 3300 38800 0000 35300 80 7800 33400 70 6400 3600 6600 4400 9300 50 3300 8000 500 300 6700 400 00 00 3600 0000 4000 300 9300 300 000 7600 00 3 35 4 48 53 57.5 63.5 68.5 73.5 8 85 9 98.5 0 07 3.5 9 4 36 0.7 0.48 5 0.83 0.9...3..3.4 3.5 3.6 3.6 4.9 5. 5. 7.9.3 3.5 5.5 7.9 9. 0.. 3.4 4.6 7.8 9 30. 3.9 34. 36.7 38 40.9 4 44. 7.5 3.5 40 45 6 66 7 76 8 86 9 97 0 07 7 7 39.5 44.5 57 63 67 74 79 84 94 99 04 3 8 3 33 38 43 58 0.04 0.038 0.038 0.048 0.043 0.043 0.07 0.063 0.063 0.05 0.09 0.09 0.5 0. 0. 0.7 0. 0. 8 8 8 0. 0 0 0.04 0.8 0.8 8 0.9 0.9 48 0 0 66 6 6 7 0.456 0.456 5 0.480 0.480 7 0.497 0.497 70 73 73 95 93 93 0.838 33 33.40 0.949 0.949

3 High Speed Precision Angular Contact Ball Bearings BNR0S, BNR0H, BNR0X ( ) NSK recommends a 5% grease fill. The values provided reflect this recommendation. Bearing Number 30BNR0S 30BNR0H 30BNR0X 35BNR0S 35BNR0H 35BNR0X 40BNR0S 40BNR0H 40BNR0X 45BNR0S 45BNR0H 45BNR0X BNR0S BNR0H BNR0X BNR0S BNR0H BNR0X 60BNR0S 60BNR0H 60BNR0X 65BNR0S 65BNR0H 65BNR0X 70BNR0S 70BNR0H 70BNR0X 75BNR0S 75BNR0H 75BNR0X 80BNR0S 80BNR0H 80BNR0X 85BNR0S 85BNR0H 85BNR0X BNR0S BNR0H BNR0X 95BNR0S 95BNR0H 95BNR0X 00BNR0S 00BNR0H 00BNR0X 05BNR0S 05BNR0H 05BNR0X 0BNR0S 0BNR0H 0BNR0X 0BNR0S 0BNR0H 0BNR0X Grease 33000 4400 4 80 3700 43300 6000 33400 380 3400 30000 300 600 7700 3400 9400 40 00 800 3300 700 7000 0 50 5600 0000 3400 4800 00 00 3700 7600 00 300 6800 9600 00 5700 8300 700 00 70 00 4400 6800 0600 3600 50 0000 0 00 9400 000 4000 Oil-Air 4700 650 77700 4300 57800 6800 3700 50 600 33400 46700 500 30800 4300 800 7600 38700 45600 50 3600 4600 4300 34000 40000 300 300 36700 00 34800 9600 7400 300 8700 600 30700 7400 4400 8700 6700 3400 70 6000 400 6400 0 00 00 4300 0000 3600 3400 8700 000 approx. 0.4 4 4 4 0.04 0.93 0.93 0.59 0.46 0.46 0.8 0.66 0.66 0.44 93 93 0.443 0.49 0.49 0.47 0.447 0.447 45 05 05 79 38 38 0.9 0.867 0.867 0.96 0.6 0.6.4...98.09.09.45.53.53.698.585.585.33.996.996.86.39.39 Boundary Dimensions Limiting Speed (rpm) Nozzle Aim Point Effective Load Centers Abutment Fillet Dimensions Mass (kg) Basic Load Ratings (N) d 30 35 40 45 60 65 70 75 80 85 95 00 05 0 0 D 6 68 75 80 95 00 0 5 5 30 40 45 60 70 80 B 3 4 5 6 6 8 8 8 0 0 4 4 4 6 8 8 r........5.5.5 r Cr 86 000 0600 700 00 0 5600 600 300 600 60 6800 300 350 36000 4000 46000 470 C 0r 57 700 79 00 90 0 3700 4800 9800 0700 40 5700 33000 340 36000 4000 47000 0 Diameter (A) 39 44.5.5 6 67.5 73 77.5 84 89 96 0 09 8.5 5 3.5 43 Distance (b)..5.7.7.5.5.5.7.7.7.7.7.5.7.7.7.7 a 3.3 4.8 6. 7.6 8.4.5.3 4.5 5.3 7.5 8.4 3 3.3 3.3 34.5 36.7 38.4 Recommended Grease Quantity () (cc/row) 8 8 0.9...7.8.9.8.9 3.8 4.0 5.5 5.7 6. 7.6 9. 9.8 d a 36 4 46 5 56 6 67 4 77 8 87 9 99 04 09 5 0 30 D a (max) 49 56 6 69 74 83 88 93 03 08 8 3 3 36 4 60 70 r a (max).5.5.5 ISO 0 series, 8 Contact Angle

BNR/BER ROBUST Series BER0S, BER0H, BER0X r b r a Dynamic Equivalent Load Nominal Contact Angle Cor* ifa e Fa/Fr e Single, DT P = XF r + YF a Fa/Fr>e Fa/Fr e DB or DT Fa/Fr>e X Y X Y X Y X Y 8 7 0 0.43.09 0.63 Db φ da φ 5 8 0 0.4 0.87 0.9 7.4 *For i, use for DB and DF and for DT. ISO 0 series, 5 Contact Angle Static Equivalent Load Nominal Contact Single, DT DB or DF Angle X0 Y0 X0 Y0 8 0.4 0.84 5 8 6 P 0 = X 0F r + Y0F a Single or DT mounting when Fr>F + Y0Fa use P0 = Fr Bearing Number d Boundary Dimensions D B r r Basic Load Ratings (N) Cr C 0 r Limiting Speed (rpm) Grease Oil-Air Nozzle Aim Point Diameter (A) Diameter (b) Recommended Grease Quantity () (cc/row) Effective Load Centers a Abutment Fillet Dimensions d a D a (max) r a (max) Mass (kg) approx. 30BER0S 30BER0H 30BER0X 35BER0S 35BER0H 35BER0X 40BER0S 40BER0H 40BER0X 45BER0S 45BER0H 45BER0X BER0S BER0H BER0X BER0S BER0H BER0X 60BER0S 60BER0H 60BER0X 65BER0S 65BER0H 65BER0X 70BER0S 70BER0H 70BER0X 75BER0S 75BER0H 75BER0X 80BER0S 80BER0H 80BER0X 85BER0S 85BER0H 85BER0X BER0S BER0H BER0X 95BER0S 95BER0H 95BER0X 00BER0S 00BER0H 00BER0X 05BER0S 05BER0H 05BER0X 0BER0S 0BER0H 0BER0X 0BER0S 0BER0H 0BER0X 30 35 40 45 60 65 70 75 80 85 95 00 05 0 0 6 68 75 80 95 00 0 5 5 30 40 45 60 70 80 3 4 5 6 6 8 8 8 0 0 4 4 4 6 8 8........5.5.5 8300 9700 000 00 600 4400 00 50 300 600 5300 5600 330 34000 340 300 44000 450 50 68 76 8600 000 300 400 80 9800 30 4600 30 33000 340 3 400 480 8300 37700 44800 4800 33000 30 300 9700 3500 0000 6700 3700 80 4700 9300 6600 00 6300 50 0700 4600 4600 9400 300 3400 7800 00 700 60 0000 800 5700 8600 00 40 7700 00 4000 6600 0000 3400 50 9600 800 500 0 00 4400 8600 0 3600 8000 0700 700 40000 580 70600 30 5600 60 30 46300 600 8400 4700 000 600 380 4600 30 340 4400 000 3300 38800 0700 30400 36400 80 7800 33400 70 6400 3600 6600 4400 9300 50 3300 8000 4800 800 600 400 00 00 3600 0000 4000 0 80 700 00 70 0 400 6700 0000 39 44.5.5 6 67.5 73 77.5 84 89 96 0 09 8.5 5 3.5 43..5.7.7.5.5.5.7.7.7.7.7.5.7.7.7.7 8 8 0.9...7.8.9.8.9 3.8 4.0 5.5 5.7 6. 7.6 9. 9.8 6.3 8. 9.9.8 3 5.7 6.9 8 30.8 3.9 34.6 36. 38.8 39.7 4. 43.9 46.7 49 36 4 46 5 56 6 67 4 77 8 87 9 99 04 09 5 0 30 49 56 6 69 74 83 88 93 03 08 8 3 3 36 4 60 70.5.5.5 0.4 4 4 4 0.04 0.93 0.93 0.59 0.46 0.46 0.8 0.66 0.66 0.44 93 93 0.443 0.49 0.49 0.47 0.447 0.447 45 05 05 79 38 38 0.9 0.867 0.867 0.96 0.6 0.6.4...98.09.09.45.53.53.698.585.585.33.996.996.86.39.39 4

Worldwide Sales Offices NSK Ltd.-Headquarters, Tokyo, Japan www.nsk.com Americas & Europe Department tel: 03-3779-70 Asia Marketing & Sales Department tel: 03-3779-7 Africa South Africa: NSK South Africa (Pty) Ltd. Johannesburg tel: (0) 458 3600 Asia and Oceania Australia: www.nskaustralia.com.au NSK Australia Pty. Ltd. Melbourne tel: (03) 9764-830 China: NSK Hong Kong Ltd. www.cn.nsk.com Hong Kong tel: 7 3 9-9933 Kunshan NSK Co., Ltd. Kunshan tel: 050-7305654 Guizhou HS NSK Bearings Co., Ltd. Anshun tel: 0853-3 NSK (Shanghai) Trading Co., Ltd. Shanghai tel: 0-6095 NSK representative office Beijing tel: 00-65-86 NSK representative office Shanghai tel: -609-5 NSK representative office Guangzhou tel: 00-873-0583 NSK representative office Anshun tel: 0853-3 India: Rane NASTECH Ltd. Chennai tel: 044-6533, 6534, 65365, 6600 NSK representative office Chennai tel: 044-433473 Indonesia: P.T. NSK Bearings Manufacturing Indonesia Jakarta tel: 0-898-0 Korea: www.kr.nsk.com NSK Korea Co., Ltd. Seoul tel: 0-387-0300 NSK Korea Co., Ltd., Changwon Plant Changwon tel: 0-87-600 Malaysia: NSK Bearings (Malaysia) Sdn. Bhd. Kuala Lumpur tel: 03-7958-4396 NSK Micro Precision (M) Sdn. Bhd. Kuala Lumpur tel: 03-96-688 New Zealand: www.nsk.co.nz NSK New Zealand Ltd. Auckland tel: (09) 76-499 Philippines: NSK representative office Manila tel: 0-759-646 Singapore: NSK International (Singapore) Pte Ltd. Singapore tel: (65) 73 0357 NSK Singapore (Pte) Ltd. Singapore tel: (65) 78 7 Taiwan: Taiwan NSK Precision Co., Ltd. Taipei tel: 0-59-0656 Thailand: NSK Bearings (Thailand) Co., Ltd. Bangkok tel: 0-64~58 Chonburi tel: (038) 4-37-8 SNNS Co., Ltd. Chachoengsao tel: (038) 5-343~3 Europe NSK Europe Ltd. (European Headquarters) www.eu.nsk.com Maidenhead, England tel: 06-8-9800 France: NSK France S.A. Paris tel: 0 30 57 39 39 Germany: NSK Deutschland Gmbh Düsseldorf tel: 00-48-0 NSK Steering Systems Europe Ltd. Stuttgart tel: 077-78-77 Neuweg Fertigung Gmbh Munderkingen tel: 0 7 3 9 3-540 Italy: NSK Italia S.P.A. Milano tel: 0-99 5-9 Poland: NSK Europe Ltd. Warsaw Liaison Office Warsaw tel: 48--645-, 56 NSK Iskra S.A. Kielce tel: 48-4-366-6 Spain: NSK Spain S.A. Barcelona tel: 93-575-404 Turkey: NSK Bearings Middle East Trading Co., Ltd. Istanbul tel: -6-44-706 United Kingdom: NSK Bearings Europe Ltd. Peterlee, England tel: 09-586-6 NSK European Technology Center., Ltd. Newark, England tel: 063-660-53 NSK UK Ltd. Newark, England tel: 063-660-53 NSK Steering Systems Europe Ltd. Coventry, England tel: 04-76-588588 North and South America NSK Americas, Inc. (American Headquarters) Ann Arbor, Michigan, U.S.A. tel: 734-93-70 Argentina: NSK Argentina SRL Buenos Aires tel: 0-476-66 Brazil: www.br.nsk.com NSK Brasil Ltda. São Paulo tel: 0-369-4700 Canada: www.ca.nsk.com NSK Canada Inc. Toronto tel: 5-8-0740 Mexico: NSK Rodamientos Mexicana, S.A. de C.V. Mexico City tel: 5-30-74 United States of America: www.us.nsk.com NSK Corporation Ann Arbor, Michigan tel: 734-93-70 Sales Offices: Ann Arbor, Michigan tel: 734-93-70 Cerritos, California tel: 56-96-975 NSK American Technical Center Ann Arbor, Michigan tel: 734-93-70 NSK Precision America, Inc. www.npa.nsk.com Addison, Illinois tel: 630-60-80 NSS America Bennington, Vermont tel: 80-44-5448 NSK Latin America Inc. www.la.nsk.com Miami, Florida tel: (305) 477-0605 NSK Ltd. has a basic policy not to export any products or technology designated as controlled items by export-related laws. When exporting the products in this brochure, the laws of the exporting country must be observed. Specifications are subject to change without notice and without any obligation on the part of the manufacturer. Every care has been taken to ensure the accuracy of the data contained in this brochure, but no liability can be accepted for any loss or damage suffered through errors or omissions. We will gratefully acknowledge any additions or corrections. CAT. No.ROBUST Printed in Canada NSK 003. The contents of this publication are the copyright of the publishers.