Angular contact ball bearings

Transcription

1 Angular contact ball bearings 7200 BE CB Y HC5 Nomenclature esign: 2. Clearance: 3. Cage esigns: B BE A E NR N2 2Z 2RS1 40 contact angle 40 contact angle, high capacity, all ISO corners Conra assembly (3000 series) Max type (3000 series) Split inner ring (3300 series) Snap ring (3000 series) Locating slot (QJ series) Shiel on both sies (3000 series) Seals of synthetic rubber (NBR) on both sies (3000 series) Note: 3000 series are ouble row angular contact bearings (C0)* C2 C3 Normal clearance (3000 series) Axial clearance tighter than normal (3000 an QJ series) Axial clearance looser than normal (3000 an QJ series) 7000 series clearance CA CB CC GA GB GC G.. Moifie for uplex mounting with axial clearance < normal Moifie for uplex mounting with normal axial clearance Moifie for uplex mounting with axial clearance > normal Moifie for uplex mounting with light preloa Moifie for uplex mounting with meium preloa Moifie for uplex mounting with heavy preloa Special preloa, value in an * Not marke on bearing or package. Y M MA P PHAS J F HC4 HC5 Presse brass cage, ball guie Machine brass cage, rolling element guie Machine winow-type brass cage, outer ring centere Injection mole cage of fiberglass reinforce polyamie 6.6, rolling element guie Injection mole winow-type cage of fiberglass reinforce polyetheretherketone (PEEK), with lubrication grooves in the guiing surfaces, outer ring center Presse steel cage, rolling element guie Machine steel cage, rolling element guie 4. Special features: Full ceramic bearing Ceramic ball set 49

2 Angular contact ball bearings Prouct Technical etails features Single row ACBB ouble row ACBB Four-point contact ACBB Bounary In accorance with In accorance with In accorance with imensions ISO ISO ISO Tolerances ABEC 3 (P6) ABEC 3 ABEC 1 Heat stabilization 257 F 257 F 257 F (125 C) (125 C) (125 C) Misalignment None contact SKF None contact SKF None contact SKF Cage materials Polyamie (P) Polyamie (TN9) Machine brass (M, MA) Machine brass (M) (limite sizes only) Presse steel (J) Presse steel (H) Axial loa max 1.4 x C 0 for 0.7 x C 0 Conra 0.7 x C 0 single or tanem F a / F r 0.3 mounte bearings 0.7 x C 0 for uplex mounte bearings Seals Not available 2RS1 Synthetic rubber (NBR) Not available Shiels Consult SKF for 2Z Stampe steel Consult SKF for NILOS ring options NILOS ring options 50

3 Introuction Introuction SKF stanar angular contact ball bearings are available with axial clearances, preloas an high precision. Single row angular contact ball bearings are esigne to accommoate axial loas acting in one irection. Uner raial loas, an inuce force acting in the axial irection is prouce which must be counteracte. Consequently, the single bearings are normally ajuste against a secon bearing. SKF angular contact ball bearings are prouce in a wie variety of esigns an sizes. Those commonly use in general engineering are shown in this catalog: Single row bearings ouble row bearings Four-point contact ball bearings Thrust pack Basic esign Angular contact ball bearings have raceways in the inner an outer rings that are isplace with respect to each other in the irection of the bearing axis. This means that they are particularly suitable for the accommoation of combine loas; for example, simultaneously acting raial an axial loas. The axial loa carrying capacity of angular contact ball bearings increases with increasing contact angle. This is efine as the angle between the line joining the points of contact between the ball an the raceways in the raial plane, along which the loa is transmitte from one raceway to the other, an a line perpenicular to the bearing axis. For single row bearings, the magnitue of the contact angle is inicate by a suffix in the esignation (B = 40 egrees) (Figure 1). For ouble row angular contact ball bearings, the contact angle is 30 egrees an for QJ four-point angular contact ball bearings the contact angle is 35 egrees an neither is inicate in the nomenclature. Figure 1 Angular contact ball bearings, single row Single row angular contact ball bearings can accommoate combine loas however the axial loas can only act in one irection (Figure 1). Uner raial loas, a force acting in the axial irection is prouce which must be counteracte. Consequently, the bearings are normally ajuste against a secon bearing. The single row angular contact ball bearings shown in the tables have one high an one low shouler on each ring, enabling a large number of balls to be incorporate. This gives the bearings relatively high loa carrying capacity. The contact angle is 40 (suffix B) an the bearings are therefore suitable for heavy axial loas. They are of non-separable esign an permit relatively high-spee operation. Bearings of the BE esign feature an increase loa carrying capacity, an either machine brass (M) or glass fiber reinforce polyamie 6-6 (P) cages as stanar. The single row angular contact ball bearings are prouce in two stanar versions for ifferent esign purposes. The stanar esign (no aitional esignation suffix such as BEP) is intene for arrangements where only one bearing is use at each bearing position (Figure 4, page 58). The most common version, ientifie by suffix CB (universal matching) is esigne for arrangements where two or more bearings are mounte immeiately ajacent to each other in ranom orer (back-to-back, face-to-face or tanem). Because of eman, the larger size bearings are only prouce with universal matching (suffix CB) (Figure 5, page 58). SKF Explorer class bearings High performance SKF Explorer angular contact ball bearings are printe in blue in the prouct tables. SKF Explorer bearings retain the esignation of the earlier stanar bearings, e.g BECBP. However, each bearing an its box are marke with the name SKF Explorer. Aitional etails on SKF Explorer performance class bearings can be foun on page 23. Prouct highlights High running accuracy an spee capabilities Angular contact ball bearings feature high raial an axial loa capacity combine with high spee capabilities. SKF ACBB are mae as stanar to ISO P6 or ABMA ABEC 3 precision as stanar. Universal matching Angular contact ball bearings are manufacture for universal mounting in multiple arrangements, incluing face-to-face, back-to-back an tanem. Large prouct assortment Available in a wie range (10 to 240 mm insie bore iameter) with cage an clearance / preloa combinations. The ouble row esign is available with a choice of shiels, seals an snap rings as well as max-type bearings with a filling slot. Special application esigns inclue 4-point contact an thrust pack. Machine brass cage for heavy uty applications The machine brass cage provies better performance an longer service life uner harsh conitions an can be use in applications where a stanar metal or plastic cage is normally use. Meets ANSI pump requirements Angular contact ball bearings are wiely use in centrifugal pump applications an are manufacture in accorance with ANSI pump stanars. 51

4 Angular contact ball bearings Introuction Angular contact ball bearings, ouble row (Figure 1a) SKF ouble row ball bearings are esigne with soli or one-piece inner an outer rings with contact angles converging outsie the bearing proviing overall system rigiity. The ouble row angular contact ball bearings are available in two styles, Conra (suffix A) an Max type (suffix E). The more popular style is the Conra type. This assembly uses a slight elastic eflection of the outer ring to insert the last ball. This results in uninterrupte raceways with smooth running, an significant thrust carrying capacity in both irections. Bearings of the Max type esign (suffix E) have a filling slot for inserting the balls. This permits assembly with a greater number of balls than in the previously escribe Conra type bearings. Filling slot bearing features are similar to those of the Conra type; however, because of the greater number of balls (with the exception of a few sizes) their raial loa carrying capacity is often higher than that of the Conra type. On the other han, heavy thrust loas can be accommoate in only one irection. These bearings shoul be mounte so that the preominant axial loa acting on the shaft is irecte away from the filling slot (Figure 1a). Thrust loas in the irection of the filling slot shoul not excee a thrust to raial loa ratio of F a / F r = 0.3. Part number markings are normally locate on either the sie face or the O.. The sie face marking is always on the sie opposite the filling slot, an the O.. marking is offset from the center away from the sie with the filling slot. Therefore, even ouble seale or shiele bearings with the filling slot covere from view can be oriente correctly. Angular contact ball bearings, four-point (Figure 1b) Four-point contact ball bearings are single row angular contact ball bearings having raceways which are esigne to enable axial loas to be accommoate in both irections. They nee less axial space than ouble row bearings. The four-point contact ball bearings shown in the following tables have a contact angle of 35 an a two-part inner ring, allowing a large number of balls to be incorporate, thus proviing a high loa carrying capacity. The bearings are separable, i.e. the inner ring halves an the outer ring with ball an cage assembly can be mounte iniviually. Angular contact ball bearings, thrust pack Athrustpackbearing consists of a stanar QJ bearing an a single row angular contact bearing (BEGAM version) matche together an are intene for applications having preominate axial loa in one irection. The axial loa shoul not reverse irection uring operation except for transient conitions such as at machine start up or shut-own, else the BEGAM bearing may become unloae an have possible skiing problems. These bearings are matche in sets an are serialize an therefore are not interchangeable amongst sets. Figure 1a Variations Angular contact ball bearings, single row for universal matching These bearings are specially manufacture so that when mounte in ranom orer (back-toback, face-to-face or tanem) (Figure 2), but immeiately ajacent to each other, the preetermine value of axial internal clearance or preloa will be attaine. An even istribution of loa will occur without shims or similar evices. The stanar bearings for universal matching carry the suffix CB where C inicates clearance an B the magnitue of the clearance (Figure 3). Bearings with a smaller or greater clearance are also available (suffixes CA an CC, respectively) as are bearings with light, moerate or heavy preloa, (suffixes GA, GB an GC, respectively where G = preloa or negative clearance). When orering bearings for universal matching; for example 7206 BECB, it is necessary to inicate the number of iniviual bearings require since SKF oes not stock these in sets. Figure 1b Figure 2 52

5 Introuction Limiting spees The limiting spees liste in the bearing tables are guieline values an are vali for single row bearings. The values uner oil lubrication are maximum values an the values uner grease lubrication are maximum values that can be attaine using a goo quality grease of a soft consistency. If single bearings are to be ajuste against each other in matche sets of two, three or four bearings, the limiting spee values given in the bearing tables must be reuce. Reuction factors are given in the table below. Reuction factors for limiting spees angular contact ball bearings, single row Bearing arrangement Two bearings 0.80 Three bearings 0.70 Four bearings 0.65 Reuction factors Loa carrying capacity of bearing sets The values given in the bearing tables for the basic ynamic loa ratings apply to single bearings. The basic ynamic an static loa ratings for sets of bearings arrange back-to-back, face-to-face or in tanem is obtaine by multiplying the C value for a single bearings by: Two bearings Three bearings Four bearings 1.62 x C 2.16 x C 2.64 x C Where the basic static loa rating is concerne, the table value C 0 shoul be multiplie by the number of bearings in the set, 2, 3 or 4. For example, a pair of 7205 BEGAP angular contact ball bearings will have the following values: C(single) = 3510 lbs C(pair) = 3510 x 1.62 = 5690 lbs C 0 (single) = 2290 lbs C 0 (pair) = 2290 x 2 = 4580 lbs Grease spee (single) = rpm Grease spee (pair) = x 0.8 = 8000 rpm The C, C 0 an spee limits of the pair of bearings must be use for calculation purposes in this case. Special solutions using angular contact ball bearings Precision angular contact ball bearings for machine tools Large-size single an ouble row bearings for heavy engineering applications Hub units prouce for the automotive inustry The precision angular contact ball bearings are available with a contact angle of 15 (suffix C) or 25 (suffix AC) an can be supplie either iniviually or in matche sets of two, three or four bearings. etails on these special solution proucts are available in other SKF publications, which can be supplie upon request. Figure CC Clearance Axial preloa CA + Axial clearance GB GC Preloa 0 53

6 Angular contact ball bearings Introuction Figure 3a Conra type esignations for Conra type ouble-row ball bearings with various combinations of seals, shiels an snap rings A A-Z A-2Z ANR A-ZNR A-ZNBR A-2ZNR A-RS A-2RS A-RSNR A-RSNBR A-2RSNR Max type esignations for Max type (single slot) filling slot ouble-row ball bearings with various combinations of seals, shiels an snap rings E E-Z E-ZB E-2Z E-RSNR E-RSNBR E-2RSNR E-RS E-RSB E-2RS ENAR E-ZNAR E-ZNABR E-2ZNAR ENR E-ZNR E-ZNBR E-2ZNR E-RSNAR E-RSNABR E-2RSNAR 54

7 Introuction Angular contact ball bearings, ouble row Shiele (Z) an seale (RS) bearings In aition to the open esigns, most SKF ouble row ball bearings are offere with shiels or seals, on either one or both sies. In most sizes, open bearings also contain seal grooves on the inner an/or outer rings. Shiels (suffix Z an 2Z) are non-contacting. They form a small gap with a chamfer on the inner ring. They are mae from presse steel an are fixe into an outer ring groove. This non-contacting closure is esigne to retain lubricant an exclue larger particles of foreign matter. These shiele bearings are primarily intene for applications with inner ring rotation. Single shiele bearings can be use with oil or grease lubrication, while ouble shiele bearings are packe with a preetermine quantity of grease, proviing maintenance-free operation for the life of the bearings. Most bearings are also available with either one or two contacting seals, (suffix -RS an -2RS). The seals consist of an oil an wear resistant elastomer bone to a metal plate. The O.. of either of the seal is firmly fixe into an outer ring groove. The lip at the I.. of the seal contacts an inner ring seal chamfer for effective closure. This seal effectively exclues soli contaminants an moisture from the insie surfaces of the bearing. The permissible operating temperature range for the seals with a proper lubricant is -40 to +250 F (-40 to +120 C). Single seale bearings can be regrease while ouble seale bearings are grease for life. They shoul not be heate at temperatures greater than 250 F (120 C) prior to mounting an must on no account be washe. Snap rings Snap rings (suffix NR) in the outer ring can provie an easy metho of locating the bearing in the application. The snap rings an the snap ring grooves in the outer rings generally conform to ABMA Stanar 20 an ISO stanar 464. Important snap ring imensions are shown in the eep groove ball bearings section, Table 4 page 57. Combination of seals, shiels an snap rings Most bearings are available in various combinations of seals, shiels an snap rings. (Figure 3a) illustrates the esignations for Conra type bearings in various configurations an shows the same for max-type filling slot bearings. In a single seale or shiele Conra type bearing with snap ring, the snap ring is normally on the opposite sie of the seal or shiel. An aitional suffix B inicates the snap ring is on the same sie as the seal or shiel, e.g. NBR. Max type bearings use a suffix A to inicate that the snap ring is on the sie of the filling slot (NAR). Suffix B in single seal or shiel esignation inicates that the seal or shiel is on the opposite sie of the filling slot (RSB or ZB). Angular contact ball bearings, four-point Locating slots Four-point contact ball bearings are esigne to accommoate preominantly axial loas an are arrange as thrust bearings with raial clearance in the housing in many applications. To permit simple location an prevent rotation of the outer ring, all bearings with an outsie iameter of 160 mm an above are provie with two locating slots in the outer ring (N2 esign). The imensions of these locating slots are given in Table 1. Table 1 Locating slots in outer ring of four-point contact ball bearings A 45 A h b r 0 A-A Outsie imensions iameter Series QJ 2 Series QJ 3 over incl. b h r 0 b h r 0 mm in mm in mm in mm in mm in mm in mm in

8 Angular contact ball bearings Introuction Internal clearance Axial internal clearance single row angular contact ball bearings Internal clearance in a single row angular contact ball bearing is only obtaine after mounting an is epenent on ajustment against a secon bearing that provies axial location in the opposite irection. Bearings for universal pairing (suffix CB) are the stanar SKF bearings for paire mounting in ranom orer (back-to-back, face-to-face or tanem). Bearings can be supplie with smaller axial internal clearance (suffix CA) or larger (suffix CC) or with preloa (suffixes GA, GB an GC) for universal pairing. Bearings ientifie by suffix CA, CB or CC can be mounte immeiately ajacent to each other in any orer an two or more bearings may be use. Bearings with preloa of the GA, GB an GC esigns can only be arrange in pairs, otherwise the preloa will increase. The values of axial internal clearance for the classes CA, CB an CC can be foun in Table 2. They are vali for bearings arrange back-toback or face-to-face before mounting an uner zero measuring loa. Preloa values for classes GA, GB an GC are given in Table 2a. Table 3 shows a conversion from the ol preloa suffices to the current suffix. Unmounte axial internal clearance of single row angular contact ball bearings of series 72B (E), 73B (E) an 74B (B) when arrange in ranom pairs (back-to-back or face-to-face) Bore iameter Axial internal clearance CA CB CC over incl. min max min max min max min max min max min max mm µm in µm in µm in Raial clearance [~=] 0.85 axial clearance. Table Table 2a Unmounte preloa of single row angular contact ball bearings of series 72B (E), 73B (E) an 74 (B) when arrange in ranom pairs (back-to-back or face-to-face) Bore iameter Preloa GA GB GC over incl. min max min max max max min max min max min max min max min max min max min max min max mm µm in N lbf µm in N lbf µm in N lbf

9 Introuction Axial internal clearance ouble row angular contact ball bearings Internal clearances for ouble row angular contact ball bearings iffer from eep groove ball bearings in that axial rather than raial clearance is specifie. Table 4 shows the axial clearance of the SKF ouble row angular contact bearings in four stanar clearance ranges; C2 (less than normal clearance), normal clearance, C3 (greater than normal clearance), an C4 (greater than C3 clearance). These are vali for bearings before mounting uner zero measuring loa. Axial internal clearance four-point contact ball bearings Stanar manufacture SKF four-point contact ball bearings have Normal axial internal clearance. Most sizes can also be supplie with greater or smaller internal clearance than Normal. Availability shoul be checke before orering. The values for the axial internal clearance are shown in Table 5 an are for bearings before mounting uner zero measuring loa. Ol versus new esignations on SRACBB (Table 3) Use this table to etermine which new preloa esignations replace ol preloa esignations. Simply fin the bearing bore size/iameter on the left, an the ol preloa across the top. The new esignation is at the point where the bore size/iameter row intersects with the ol preloa column. *Example: 7308 BEAG1Y = 08 bore size, 40 mm bore iameter G1 (100 lbs) preloa Replace with: 7308 BEGBY Ol/new preloa esignation interchange, single row angular contact ball bearings 72xx, 73xx an 74xx series Bore Bore Ol preloa suffix size iameter (mm) G02 G05 G1* G2 G3 G GB GB GC GB GB GC GB GB GC GB GB GC GA GB GC GA GB GC GA GB GB GC 08* 40* GA GB GB* GC GA GB GB GC GA GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC GA GA GB GB GB GC Table 3 Table 4 Axial internal clearance of Conra type an filling slot ouble row angular contact ball bearings 32 an 33 series (values in mm) Bore iameter Axial internal clearance C2 Normal C3 C4 over incl. min max min max min max min max min max min max min max min max mm µm in µm in µm in µm in

10 Angular contact ball bearings Introuction Table 5 Axial internal clearance of four-point contact ball bearings Bore Axial internal clearance iameter C2 Normal C3 C4 over incl. min max min max min max min max min max min max min max min max mm in mm in µm in µm in µm in µm in Raial clearance [~=] 0.7 axial clearance. esign of bearing arrangements When esigning bearing arrangements using single row angular contact ball bearings it is necessary to pay attention to the special characteristics of the bearings. Because of their internal esign they cannot be use singly an must be use either with a secon bearing (Figure 4) or as bearing sets (Figure 5). As alreay mentione uner "Internal clearance", it is necessary to ajust the two single row angular contact ball bearings of an arrangement against each other until the operational clearance or requisite preloa is obtaine. Arrangements using bearings for universal mounting, where the bearings are immeiately ajacent to each other, o not require ajustment. Here, the require operational preloa or clearance is obtaine by choosing an appropriate preloa or clearance class as well as suitable fits for the bearings in the housing an on the shaft. For more specific mounting instructions visit the SKF website at or contact SKF Applications Engineering. Figure 4 Figure 5 58

11 Introuction Loas Equivalent ynamic bearing loa for single row bearings of the B an BE esigns when mounte as single bearings or paire in tanem P = F r when F a / F r 1.14 P = 0.35 F r F a when F a / F r > 1.14 where P = equivalent ynamic bearing loa F r = raial loa acting on the bearing F a = axial loa acting on the bearing When etermining the axial force F a reference shoul be mae to the following section. Equivalent ynamic bearing loa for bearings mounte in pairs, back-toback or face-to-face P = F r F a when F a / F r 1.14 P = 0.57 F r F a when F a / F r > 1.14 F a an F r are the forces acting on the bearing pair. Equivalent ynamic bearing loa for ouble row bearings For the ouble row angular contact bearings escribe in this catalog, the equivalent ynamic bearing loa is P = XF r + YF a where P = equivalent ynamic bearing loa X= raial loa factorforthe bearing Y= axial loa factorforthe bearing F r = actual raial bearing loa F a = actual axial bearing loa Xan Yfactors are given foreach bearing in Table 6a for Conra type an Table 6b for Max type they change epening on the loa ratio F a / F r in relationship to the reference value e. Equivalent ynamic bearing loa for four-point contact bearings When four-point contact ball bearings with a contact angle of 35 are use as locating bearings to accommoate raial an axial loas, the equivalent ynamic bearing loa can be obtaine from P = F r F a when F a / F r 0.95 P = 0.6 F r F a when F a / F r > 0.95 It shoul be remembere that satisfactory performance of the ball set of four-point contact ball bearings is only obtaine when the balls are in contact with the raceways at two points, i.e. when the axial loa F a 1.27 F r If the four-point contact ball bearing is use as a thrust bearing in combination with other raial bearings, an it is mounte with raial clearance in the housing, the equivalent ynamic bearing loa becomes P = 1.07 F a Minimum loa In orer to provie satisfactory operation of all ball an roller bearings they must always be subjecte to a given minimum loa. This is also true of angular contact ball bearings, particularly if they run at high spees where the inertia forces of the balls an cage, an the friction in the lubricant can have a etrimental influence on the rolling conitions in the bearing an may cause amaging sliing movements to occur between the balls an the raceways. The requisite minimum raial loa to be applie in such cases can be etermine by using the Interactive Engineering Catalog on the SKF website or by contacting SKF Applications Engineering. However, the weight of the components supporte by the bearing, together with the external forces, often excees the requisite minimum loa. If this is not the case, an aitional raial loa must be applie to the bearing; for example, by increasing belt tension, by applying a preloa to the inner or outer rings, or by using springs. Frequency vibration ata Frequency vibration ata is available on the SKF website in the Interactive Engineering Catalog or by contacting SKF Applications Engineering. 59

12 Angular contact ball bearings Introuction Table 6a Calculation factors for ouble row angular contact ball bearings, Conra type esignation ynamic Static F a / F r e F a / F r e e X Y X Y Y A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A

13 Introuction Table 6b Calculation factors for ouble row angular contact ball bearings, Max type esignation ynamic Static F a / F r e F a / F r e e X Y X Y Y E E E E E E E E E E E E E E E E E E E E E E E E E E E E

14 Angular contact ball bearings Single row Stanar an SKF Explorer Series: 7200 BE 7248 B Size: 10 mm 240 mm in in B These bearings are typically mounte in pairs. Refer to page 52 for etails. esignation Principal imensions Basic loa ratings Spee rating Mass Bore Outsie iameter With ynamic Static Reference Limiting B C C 0 spee spee mm in mm in mm in N lbf N lbf r/min r/min kg lb 7200 BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE B B B B B B B B B

15 B Single row Stanar an SKF Explorer Series: 7301 BE 7330 B Size: 12 mm 150 mm in in These bearings are typically mounte in pairs. Refer to page 52 for etails. esignation Principal imensions Basic loa ratings Spee rating Mass Bore Outsie iameter With ynamic Static Reference Limiting B C C 0 spee spee mm in mm in mm in N lbf N lbf r/min r/min kg lb 7301 BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE BE B B B B

16 Angular contact ball bearings Single row Stanar Series: 7334 B 7344 B Size: 170 mm 220 mm in in B Series: 7405 B 7432 Size: 25 mm 160 mm in in These bearings are typically mounte in pairs. Refer to page 52 for etails. esignation Principal imensions Basic loa ratings Spee rating Mass Bore Outsie iameter With ynamic Static Reference Limiting B C C 0 spee spee mm in mm in mm in N lbf N lbf r/min r/min kg lb 7334 B B B B B B B B B B B B B B B B B B

17 B Single row Four-point ACBB Stanar an SKF Explorer Series: QJ 202 N2MA QJ 252 N2MA Size: 15 mm 260 mm in in "N2" esign N2 esign These bearings are typically mounte in pairs. Refer to page 52 for etails. esignation Principal imensions Basic loa ratings Spee rating Mass Bore Outsie iameter With ynamic Static Reference Limiting B C C 0 spee spee mm in mm in mm in N lbf N lbf r/min r/min kg lb QJ 202 N2MA QJ 203 N2MA QJ 205 MA QJ 206 MA QJ 207 N2MA QJ 208 MA QJ 209 MA QJ 210 MA QJ 211 MA QJ 212 MA QJ 212 N2PHAS QJ 213 MA QJ 214 MA QJ 215 MA QJ 216 MA QJ 217 MA QJ 218 N2MA QJ 219 N2MA QJ 220 N2MA QJ 222 N2MA QJ 224 N2MA QJ 226 N2MA QJ 228 N2MA QJ 230 N2MA QJ 232 N2MA QJ 234 N2MA QJ 236 N2MA QJ 240 N2MA QJ 248 N2MA QJ 252 N2MA

18 Angular contact ball bearings Single row Four-point ACBB Stanar an SKF Explorer Series: QJ 303 N2MA QJ 344 N2MA Size: 17 mm 220 mm in in B "N2" esign N2 esign esignation Principal imensions Basic loa ratings Spee rating Mass Bore Outsie iameter With ynamic Static Reference Limiting B C C 0 spee spee mm in mm in mm in N lbf N lbf r/min r/min kg lb QJ 303 N2MA QJ 304 MA QJ 305 MA QJ 306 MA QJ 307 MA QJ 308 MA QJ 309 MA QJ 310 MA QJ 311 MA QJ 312 MA QJ 313 MA QJ 314 MA QJ 315 N2MA QJ 316 N2MA QJ 317 N2MA QJ 318 N2MA QJ 319 N2MA QJ 320 N2MA QJ 322 N2MA QJ 324 N2MA QJ 326 N2MA QJ 328 N2MA QJ 330 N2MA QJ 332 N2MA QJ 334 N2MA QJ 336 N2MA QJ 338 N2MA QJ 344 N2/ QJ 344 N2MA

19 B Single row Four-point ACBB Stanar Series: QJ 1017 N2MA QJ 1988 N2MA Size: 85 mm 440 mm in in "N2" esign N2 esign esignation Principal imensions Basic loa ratings Spee rating Mass Bore Outsie iameter With ynamic Static Reference Limiting B C C 0 spee spee mm in mm in mm in N lbf N lbf r/min r/min kg lb QJ 1017 N2MA QJ 1021 N2MA QJ 1022 N2MA QJ 1030 N2MA QJ 1032 N2MA QJ 1038 N2MA QJ 1040 N2MA QJ 1056 N2MA QJ 1060 MA QJ 1064 MA QJ 1068 N2MA QJ 1072 N2MA QJ 1076 N2MA QJ 1080 N2MA QJ 1084 N2MA QJ 1088 N2MA QJ 1092 N2MA QJ 1096 N2MA QJ 1240 N2MA QJ 1244 N2MA QJ 1248 MA/ QJ 1252 MA QJ 1256 N2MA QJ 1260 N2MA QJ 1264 N2MA QJ 1268 MA/ QJ 1272 N2MA QJ 1276 N2MA QJ 1280 N2MA QJ 1284 N2MA QJ 1288 N2MA QJ 1292 N2MA QJ 1296 N2MA QJ 1984 MA QJ 1988 N2MA