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SUPER PRECISION<br />
MEDIUM ISO 03 SERIES<br />
MM300K<br />
C<br />
r<br />
2<br />
SUPER PRECISION MM<br />
Running accuracy and per<strong>for</strong>mance meet ABEC 9 (ISO P2) levels.<br />
Other features con<strong>for</strong>m to ABEC 7 (ISO P4) requirements.<br />
D<br />
r<br />
d<br />
C<br />
LOAD RATINGS<br />
Bearing<br />
Number<br />
d<br />
Bore<br />
D<br />
O.D.<br />
C<br />
Width (1) Ball<br />
Qty. x Dia.<br />
Bearing<br />
Wt.<br />
C o<br />
Static<br />
C e<br />
Dynamic<br />
Speed<br />
Rating (Ng) C o<br />
Static<br />
C e<br />
Dynamic<br />
Speed<br />
Rating (Ng) r<br />
Rad. (2)<br />
mm/in. mm/in. kg/lbs. N/lbs. RPM N/lbs. RPM mm/in.<br />
MM305K 25 62 17 7 x 11.9 0.222 12100 26200 26500 10800 26200 31800 1.0<br />
0.9843 2.4409 0.6693 7 x 15/32 0.49 2730 5890 26500 2430 5890 31800 0.039<br />
MM306K 30 72 19 7 x 13.5 0.327 15800 33100 22300 14100 33100 26760 1.0<br />
1.1811 2.8346 0.7480 7 x 17/32 0.72 3560 7440 22300 3160 7440 26760 0.039<br />
MM307K 35 80 21 7 x 14.3 0.431 18300 37100 19400 16300 37100 23280 1.5<br />
1.3780 3.1496 0.8268 7 x 9/16 0.95 4120 8340 19400 3670 8340 23280 0.059<br />
MM308K 40 90 23 7 x 15.9 0.594 22800 45000 17100 20300 45000 20520 1.5<br />
1.5748 3.5433 0.9055 7 x 5/8 1.31 5120 10100 17100 4560 10100 20520 0.059<br />
MM309K 45 100 25 8 x 17.5 0.807 31700 58500 15200 28200 58500 18240 1.5<br />
1.7717 3.9370 0.9843 8 x 11/16 1.78 7120 13200 15200 6340 13200 18240 0.059<br />
MM310K 50 110 27 8 x 19.1 1.052 37900 68600 13800 33700 68600 16560 1.5<br />
1.9685 4.3307 1.0630 8 x 3/4 2.32 8510 15400 13800 7570 15400 16560 0.059<br />
MM311K 55 120 29 8 x 20.6 1.329 44600 79300 12500 39700 79300 15000 2.0<br />
2.1654 4.7244 1.1417 8 x 13/16 2.93 10000 17800 12500 8920 17800 15000 0.079<br />
MM312K 60 130 31 8 x 22.2 1.665 51800 90700 11500 46100 90700 13800 2.0<br />
2.3622 5.1181 1.2205 8 x 7/8 3.67 11700 20400 11500 10400 20400 13800 0.079<br />
MM313K 65 140 33 8 x 23.8 2.046 59700 102700 10700 53100 102700 12840 2.0<br />
2.5591 5.5118 1.2992 8 x 15/16 4.51 13400 23100 10700 11900 23100 12840 0.079<br />
MM314K 70 150 35 8 x 25.4 2.486 68000 115500 9900 60600 115500 11880 2.0<br />
2.7559 5.9055 1.3780 8 x 1 5.48 15300 26000 9900 13600 26000 11880 0.079<br />
Steel Ball<br />
Ceramic Ball<br />
(Ng) For a single, grease-lubricated, spring-preloaded bearing. This value to be used in permissible operating speed (Sp) calculation.<br />
(1) Width tolerance of preloaded bearing set +0.000/-0.254 mm (+0.0000/-0.0100 in.).<br />
(2) ABMA STD 20 (r as max).<br />
A<br />
198 TIMKEN MACHINE TOOL CATALOG
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