Miniature ball bearing comparison

Single row radial deep groove ball bearings with flange

Inch dimensions

d D B Bf Designation Designation Dc1 Bc2 Bcf2 Li Lo r max h min Balls n x Ø Load ratings [1]
mm mm mm mm mm mm mm mm mm mm mm mm dynamic static
inch inch inch inch open ball bearings closed ball bearings US inch inch inch inch inch inch inch inch C N Co N
1.016  3.175  1.191  ULK 1304X   4.343 0.330 1.60 2.40 0.10 0.3 7 x  0.500 38 6
  .0400    .1250    .0469 FR 09      .1710    .0130    .0630    .0945    .004    .012    .0197
1.191  3.969  1.588  2.381  ULK 1505X ULKZ 1505X   5.156 0.330 0.787 1.93 3.18 0.13 0.4 6 x 0.794  85 16
  .0469    .1563    .0625    .0938 FR 0      .2030    .0130  0.310    .0760    .1252    .005    .016    .03125
1.397 4.763  1.984 2.778  RK 1706X RKX/RKF 1706X   5.944 0.584 0.787 2.35 3.83 0.13 0.4 6 x 1.000 138 29
  .0550   .1875    .0781    .1094 FR 1      .2340    .0230    .0310    .0925    .1508    .005    .016    .0394
1.984  6.350  2.381 3.572 RK 2508X RKX/RKF 2508X   7.518  0.584  0.787  3.16  4.75  0.13  0.5  7 x 1.000 165 38
  .0781   .2500   .0938   .1406 FR 1-4      .2960      .0230    .0310    .1244    .1870    .005    .020    .0394
2.381 4.763 1.588 2.381 ULK 3006X ULKZ 3006X   5.944  0.457  0.787  2.86  4.14  0.13  0.4  7 x 0.794  101 22
  .0938   .1875   .0625   .0938 FR 133      .2340    .0180    .0310    .1126    .1630    .005  0.16    .03125
2.381 7.938  2.778  3.572  RK 3010X RKX/RKF 3010X   9.119  0.584  0.787  4.13  6.67  0.13  0.5  6 x 1.588 351 86
  .0938    .3125    .1094    .1406 FR 1-5      .3590    .0230    .0310    .1626    .2626    .005    .020    .0625
3.175 6.350 2.381 2.778 ULK 4008X ULKZ 4008X   7.518  0.584  0.787  3.95  5.53  0.13  0.5  8 x 1.000 184 47
  .1250   .2500   .0938   .1094 FR 144      .2960    .0230    .0310    .1555    .2177    .005    .020    .0394
3.175 7.938 2.778 3.572 RK 4010X RKX/RKF 4010X 9.119 0.584  0.787  4.13  6.67  0.13  0.5  6 x 1.588  351  86
  .1250    .3125    .1094    .1406 FR 2-5      .3590    .0230    .0310    .1626    .2626    .005    .020    .0625
3.175  9.525  3.969  3.969  RK 4012X RKX/RKF 4012X 11.176  0.762  0.762  5.33  7.87  0.30  0.7  7 x  1.588 407 110
  .1250    .3750    .1563    .1563 FR 2      .4400    .0300    .0300    .2098    .3098    .012    .028    .0625
3.969   7.938  2.778  3.175  ULK 5010X ULKZ 5010X 9.119 0.584 0.914   4.98   6.82 0.13 0.5 8 x  1.150 250 70
  .1563      .3125    .1094    .1250 FR 155      .3590   .0230   .0360     .1961     .2685   .005   .020    .0453
4.763   7.938 2.778 3.175 ULK 6010X ULKZ 6010X   9.119 0.584 0.914   5.57   7.10 0.13 0.5 9 x  1.00 198 58
  .1875      .3125    .1094    .1250 FR 156      .3590   .0230   .0360     .2193     .2787   .005   .020      .0394
4.763   9.525 3.175 3.175 ULK 6012X ULKZ 6012X 10.719 0.584 0.787   5.95   8.35 0.13 0.6 8 x 1.588 450 130
  .1875       .3750    .1250    .1250 FR 166      .4220   .0230   .0310     .2343     .3287   .005   .024      .0625
4.763 12.700 4.978 4.978 RK 6016X RKX/RKF 6016X 14.351 1.067 1.067   7.00 10.70 0.30 0.8 7 x 2.381 1028 346
  .1875       .5000   .1960   .1960 FR 3      .5650   .0420   .0420     .2756     .4213   .012   .031    .09375
4.763 12.700 3.969 RKT 6016X 14.351 1.067   7.00 10.70 0.30 0.8 7 x 2.381 1028 346
  .1875     .5000   .1563 FR 3      .5650   .0420        .2756     .4213   .012 .031    .09375
6.35   9.525 3.175 3.175 ULK 8012X ULKZ 8012X 10.719 0.584 0.914   7.22   8.77 0.13 0.6 11 x 1.000 220 74
  .2500     .3750   .1250   .1250 FR 168      .4220    .0230    .0360      .2843      .3453   .005   .024      .0394
6.35 12.700 3.175 4.763 ULK 8016X ULKZ 8016X 13.894 0.584 1.143   7.90 11.11 0.13 0.6  8 x 2.100 726 219
  .2500     .5000   .1250   .1875 FR 188      .5470   .0230   .0450     .3110     .4374   .005   .024      .0827
6.35 15.875 4.978 4.978 RK 8020X RKX/RKF 8020X 17.526 1.067 1.067   9.26 12.96 0.30 0.8  8 x 2.381 1145 436
  .2500     .6250   .1960   .1960 FR 4      .6900    .0420    .0420      .3646      .5102   .012   .031      .09375
7.938 12.700 3.969 3.969 ULK 10016X ULKZ 10016X 13.894 0.787 0.787   9.23 11.40 0.13 0.6 11 x 1.588 555 199
  .3125     .5000   .1563   .1563 FR 1810     .5470   .0310   .0310     .3634      .4488   .005   .024      .0625
9.525 22.225 7.144 7.144 RK 12028X RKZ 12028X 24.613 1.575 1.575 13.21 18.87 0.40 0.8 7 x 3.969 2183 719
  .3750     .8750   .2813   .2813 FR 6     .9690   .0620   .0620     .5201     .7429   .016   .031      .1563
1 Tolerance for Dc: 0 0
-125 μm -.005”
1 Tolerance for Bc and Bcf: 0 0
-50 μm -.002”
[1] myonic bearings are designed as standard for high speeds and low-friction operation. Please contact us if your application requires higher load capacities: info@myonic.com