Ball Bearings Catalog - Timken

Ball screW suPPort series
DiMensional siZes – Metric series (inch units)
• Designed for maximum axial rigidty, low drag torque, and extreme control of lateral
eccentricity.
• Manufactured to ABEC 9 axial tolerances.
• Nonseparable angular-contact type design (60˚ contact angle).
• Manufactured to ABEC 7 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].
Bearing number
C
[2xC]
Super Precision
D D a
d D c Wt. (3) Ball Qty. r da(shaft) Da (housing) shaft Dia. housing Dia.
Bore o.D. Width (1) x Dia. rad. (2) Max. Min. Max. Min. Max. Min. Max. Min.
inch mm/tol: +0; -(µm) lbs. in. in. in. in. in. in. in. in. in. in.
MM12Bs32 0.4724 1.2598 0.3937 0.09 11 x 3 /16 0.031 0.6941 0.6839 1.0484 1.0382 0.4723 0.4721 1.2601 1.2598
(1.5) (2.5) (31)
MM15Bs35 0.5906 1.3780 0.4331 0.11 13 x 3 /16 0.031 0.8122 0.8020 1.1665 1.1563 0.5904 0.5902 1.3782 1.3780
(1.5) (2.5) (31)
MM17Bs47 0.6693 1.8504 0.5906 0.29 12 x 5 /32 0.031 0.9106 0.9004 1.6390 1.6287 0.6691 0.6690 1.8506 1.8504
(1.5) (2.5) (31)
MM20Bs47 0.7874 1.8504 0.5906 0.26 12 x 5 /32 0.031 1.0287 1.0185 1.6390 1.6287 0.7872 0.7870 1.8506 1.8504
(2) (2.5) (47)
MM25Bs52 0.9843 2.0472 0.5906 0.37 13 x 5 /32 0.031 1.2453 1.2350 1.7177 1.7075 0.9841 0.9839 2.0475 2.0472
(2) (3) (47)
MM25Bs62 0.9843 2.4409 0.5906 0.51 17 x 5 /32 0.031 1.3831 1.3728 2.2098 2.1996 0.9841 0.9839 2.4412 2.4409
(2) (3) (47)
MM30Bs62 1.1811 2.4409 0.5906 0.46 17 x 5 /32 0.031 1.5799 1.5697 2.2098 2.1996 1.1809 1.1807 2.4412 2.4409
(2) (3) (47)
MM30Bs72 1.1811 2.8346 0.5906 0.71 18 x 11 /32 0.031 1.5799 1.5697 2.2098 2.1996 1.1809 1.1807 2.8349 2.8346
(2) (3) (47)
MM35Bs72 1.3780 2.8346 0.5906 0.64 18 x 11 /32 0.031 1.6587 1.6484 2.5248 2.5146 1.3777 1.3775 2.8349 2.8346
(2.5) (3) (47)
MM35Bs100 1.3780 3.9370 0.7874 1.90 18 x 1 /2 0.031 1.6587 1.6484 3.5484 3.5382 1.3777 1.3775 3.9373 3.9370
(2.5) (3) (47)
MM40Bs72 1.5748 2.8346 0.5906 0.55 18 x 11 /32 0.031 1.8555 1.8453 2.5248 2.5146 1.5746 1.5743 2.8349 2.8346
(2.5) (3) (47)
MM40Bs90 1.5748 3.5433 0.5906 1.08 24 x 11 /32 0.031 1.8555 1.8453 3.2335 3.2232 1.5746 1.5743 3.5436 3.5433
(2.5) (3) (47)
MM40Bs90-20 1.5748 3.5433 0.7874 1.46 24 x 11 /32 0.031 1.8555 1.8453 3.2335 3.2232 1.5746 1.5743 3.5436 3.5433
(2.5) (3) (47)
MM40Bs90-23 1.5748 3.5433 0.9055 1.65 24 x 11 /32 0.031 1.8555 1.8453 3.2335 3.2232 1.5746 1.5743 3.5436 3.5433
(2.5) (3) (47)
MM40Bs100 1.5748 3.9370 0.7874 1.81 18 x 1 /2 0.031 1.8555 1.8453 3.5484 3.5382 1.5746 1.5743 3.9373 3.9370
(2.5) (3) (47)
MM45Bs75 1.7717 2.9528 0.5906 0.55 20 x 11 /32 0.031 2.0524 2.0421 2.7217 2.7114 1.7714 1.7712 2.9530 2.9528
(2.5) (3) (47)
MM45Bs100 1.7717 3.9370 0.7874 1.68 18 x 1 /2 0.031 2.1311 2.1209 3.5484 3.5382 1.7714 1.7712 3.9373 3.9370
(2.5) (3) (47)
MM50Bs90 1.9685 3.5433 0.5906 0.90 24 x 11 /32 0.031 2.3280 2.3177 3.2335 3.2232 1.9683 1.9680 3.5436 3.5433
(2.5) (3) (47)
MM50Bs100 1.9685 3.9370 0.7874 1.57 18 x 1 /2 0.031 2.3280 2.3177 3.5484 3.5382 1.9683 1.9680 3.9373 3.9370
(2.5) (3) (47)
MM55Bs90 2.1654 3.5433 0.5906 0.79 24 x 11 /32 0.031 2.4854 2.4752 3.2335 3.2232 2.1651 2.1648 3.5436 3.5433
(3) (3) (59)
MM55Bs120 2.1654 4.7244 0.7874 2.51 21 x 1 /2 0.039 2.5642 2.5539 4.3358 4.3256 2.1651 2.1648 4.7247 4.7244
(3) (3) (59)
MM60Bs120 2.3622 4.7244 0.7874 2.34 21 x 1 /2 0.039 2.7610 2.7508 4.3358 4.3256 2.3619 2.3617 4.7247 4.7244
(3) (3) (59)
MM75Bs110 2.9528 4.3307 0.5906 1.01 30 x 11/32 0.031 3.3122 3.3020 4.0209 4.0106 2.9525 2.9522 4.3310 4.3307
(3) (3) (59)
MM100Bs150 3.9370 5.9055 0.7874 2.82 26 x 1/2 0.039 4.3358 4.3256 5.4382 5.4280 3.9367 3.9364 5.9059 5.9055
(3) (3.5) (79)
(1) Width tolerance of preloaded bearing set +0/-0.25 mm (+0/-0.010"). (2) ABMA STD 20 (ras max). (3) Single bearing.
d
r
TIMKEN PRODUCTS CATALOG D203
r
d a
•
AD
A