Timken Super Precision Bearings for Machine Tool Applications

SUPER PRECISION
2
C
BALL SCREW SUPPORT SERIES
METRIC SERIES
• Designed for maximum axial rigidity, low drag torque and
extreme control of lateral eccentricity.
• Manufactured to ABEC 9/ISO P2 axial tolerances.
• Non-separable angular-contact type design (60 degree contact
angle).
• Manufactured to ABEC 7/ISO P4 radial and envelope tolerances.
• Maximum complement of balls.
• Supplied prelubricated with heavy-duty grease NLGI #2.
• Packaged in DB arrangement [can be mounted in duplexed
pairs and in multiplexed sets in either Back-to-Back
(DB), Face-to-Face (DF) or Tandem (DT) arrangements].
d
Bore
D
O.D.
C
Width (1)
D
d
C
Suggested Shoulder Diameters
Ball Qty.
x Dia. Wt. (2) r
Rad. (3) Shaft Housing Shaft Dia. Housing Dia.
Max. Min. Max. Min. Max. Min. Max. Min.
Bearing Number
mm/in. mm/in. kg/lbs mm/in. mm/in. mm/in. mm/in. mm/in.
MM12BS32 12 32 10 11 x 4.8 0.040 0.8 17.630 17.370 26.630 26.370 11.996 11.992 32.006 32.000
0.4724 1.2598 0.3937 11 x 3/16 0.09 0.031 0.6941 0.6839 1.0484 1.0382 0.4723 0.4721 1.2601 1.2598
MM15BS35 15 35 11 13 x 4.8 0.050 0.8 20.630 20.370 29.630 29.370 14.996 14.992 35.006 35.000
0.5906 1.3780 0.4331 13 x 3/16 0.11 0.031 0.8122 0.8020 1.1665 1.1563 0.5904 0.5902 1.3782 1.3780
MM17BS47 17 47 15 12 x 7.9 0.130 0.8 23.130 22.870 41.630 41.370 16.996 16.992 47.006 47.000
0.6693 1.8504 0.5906 12 x 5/32 0.29 0.031 0.9106 0.9004 1.6390 1.6287 0.6691 0.6690 1.8506 1.8504
MM20BS47 20 47 15 12 x 7.9 0.120 0.8 26.130 25.870 41.630 41.370 19.995 19.990 47.006 47.000
0.7874 1.8504 0.5906 12 x 5/32 0.26 0.031 1.0287 1.0185 1.6390 1.6287 0.7872 0.7870 1.8506 1.8504
MM25BS52 25 52 15 13 x 7.9 0.140 0.8 31.630 31.370 43.630 43.370 24.995 24.990 52.007 52.000
0.9843 2.0472 0.5906 13 x 5/32 0.37 0.031 1.2453 1.2350 1.7177 1.7075 0.9841 0.9839 2.0475 2.0472
MM25BS62 25 62 15 17 x 7.9 0.230 0.8 35.130 34.870 56.130 55.870 24.995 24.990 62.007 62.000
0.9843 2.4409 0.5906 17 x 5/32 0.51 0.031 1.3831 1.3728 2.2098 2.1996 0.9841 0.9839 2.4412 2.4409
MM30BS62 30 62 15 17 x 7.9 0.210 0.8 40.130 39.870 56.130 55.870 29.995 29.990 62.007 62.000
1.1811 2.4409 0.5906 17 x 5/32 0.46 0.031 1.5799 1.5697 2.2098 2.1996 1.1809 1.1807 2.4412 2.4409
MM30BS72 30 72 15 18 x 8.7 0.320 0.8 40.130 39.870 56.130 55.870 29.995 29.990 72.007 72.000
1.1811 2.8346 0.5906 18 x 11/32 0.71 0.031 1.5799 1.5697 2.2098 2.1996 1.1809 1.1807 2.8349 2.8346
MM35BS72 35 72 15 18 x 8.7 0.290 0.8 42.130 41.870 64.130 63.870 34.994 34.988 72.007 72.000
1.3780 2.8346 0.5906 18 x 11/32 0.64 0.031 1.6587 1.6484 2.5248 2.5146 1.3777 1.3775 2.8349 2.8346
MM35BS100 35 100 20 18 x 12.7 0.860 0.8 42.130 41.870 90.130 89.870 34.994 34.998 100.007 100.000
1.3780 3.9370 0.7874 18 x 1/2 1.90 0.031 1.6587 1.6484 3.5484 3.5382 1.3777 1.3775 3.9373 3.9370
MM40BS72 40 72 15 18 x 8.7 0.250 0.8 47.130 46.870 64.130 63.870 39.994 39.998 72.007 72.000
1.5748 2.8346 0.5906 18 x 11/32 0.55 0.031 1.8555 1.8453 2.5248 2.5146 1.5746 1.5743 2.8349 2.8346
MM40BS90 40 90 15 24 x 8.7 0.490 0.8 47.130 46.870 82.130 81.870 39.994 39.988 90.008 90.000
1.5748 3.5433 0.5906 24 x 11/32 1.08 0.031 1.8555 1.8453 3.2335 3.2232 1.5746 1.5743 3.5436 3.5433
MM40BS90-20 40 90 20 24 x 8.7 0.660 0.8 47.130 46.870 82.130 81.870 39.994 39.998 90.008 90.000
1.5748 3.5433 0.7874 24 x 11/32 1.46 0.031 1.8555 1.8453 3.2335 3.2232 1.5746 1.5743 3.5436 3.5433
MM40BS90-23 40 90 23 24 x 8.7 0.750 0.8 47.130 46.870 82.130 81.870 39.994 39.988 90.008 90.000
1.5748 3.5433 0.9055 24 x 11/32 1.65 0.031 1.8555 1.8453 3.2335 3.2232 1.5746 1.5743 3.5436 3.5433
[2xC]
r
r
A
(1) Width tolerance of preloaded bearing set +0.000/-0.254 mm (+0.0000/-0.0100 in.).
(2) Single bearing.
(3) ABMA STD 20 (r as max).
Continued on next page.
200 TIMKEN MACHINE TOOL CATALOG