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ENGINEERING<br />
A<br />
TOLERANCES – continued<br />
INCH SYSTEM BEARINGS<br />
Inch system bearings are manufactured to a number of tolerance<br />
classes. Classes 3, 0, 00 and 000 are “precision” classes.<br />
Bearing<br />
types (1)<br />
TS<br />
TSF<br />
TSL (2)<br />
TDI<br />
TDIT<br />
TDO<br />
TNA<br />
Cone bore<br />
Bore<br />
Over Incl.<br />
mm<br />
in.<br />
mm<br />
in.<br />
Inch bearing tolerances<br />
<strong>Precision</strong> bearing class<br />
3 0 00 000<br />
Max. Min. Max. Min. Max. Min. Max. Min.<br />
mm<br />
in.<br />
mm<br />
in.<br />
mm<br />
in.<br />
0.000 76.200 +0.013 0.000 +0.013 0.000 +0.008 0.000 +0.008 0.000<br />
0.0000 3.0000 +0.0005 0.0000 +0.0005 0.0000 +0.0003 0.0000 +0.0003 0.0000<br />
76.200 304.800 +0.013 0.000 +0.013 0.000 +0.008 0.000 +0.008 0.000<br />
3.0000 12.0000 +0.0005 0.0000 +0.0005 0.0000 +0.0003 0.0000 +0.0003 0.0000<br />
304.800 609.600 +0.025 0.000 – – – – – –<br />
12.0000 24.0000 +0.0010 0.0000 – – – – – –<br />
609.600 914.400 +0.038 0.000 – – – – – –<br />
24.0000 36.0000 +0.0015 0.0000 – – – – – –<br />
914.400 1219.200 +0.051 0.000 – – – – – –<br />
36.0000 48.0000 +0.0020 0.0000 – – – – – –<br />
1219.200 +0.076 0.000 – – – – – –<br />
48.0000 +0.0030 0.0000 – – – – – –<br />
mm<br />
in.<br />
mm<br />
in.<br />
mm<br />
in.<br />
mm<br />
in.<br />
mm<br />
in.<br />
Bearing<br />
types (1)<br />
TS<br />
TSF<br />
TSL<br />
TDI<br />
TDIT<br />
TDO<br />
TNA<br />
TNASW<br />
TNASWE<br />
Cup O.D.<br />
Bore<br />
Over Incl.<br />
mm<br />
in.<br />
mm<br />
in.<br />
Inch bearing tolerances<br />
<strong>Precision</strong> bearing class<br />
3 0 00 000<br />
Max. Min. Max. Min. Max. Min. Max. Min.<br />
mm<br />
in.<br />
mm<br />
in.<br />
mm<br />
in.<br />
0.000 304.800 +0.013 0.000 +0.013 0.000 +0.008 0.000 +0.008 0.000<br />
0.0000 12.0000 +0.0005 0.0000 +0.0005 0.0000 +0.0003 0.0000 +0.0003 0.0000<br />
304.800 609.600 +0.025 0.000 – – – – – –<br />
12.0000 24.0000 +0.0010 0.0000 – – – – – –<br />
609.600 914.400 +0.038 0.000 – – – – – –<br />
24.0000 36.0000 +0.0015 0.0000 – – – – – –<br />
914.400 1219.200 +0.051 0.000 – – – – – –<br />
36.0000 48.0000 +0.0020 0.0000 – – – – – –<br />
1219.200 +0.076 0.000 – – – – – –<br />
48.0000 +0.0030 0.0000 – – – – – –<br />
mm<br />
in.<br />
mm<br />
in.<br />
mm<br />
in.<br />
mm<br />
in.<br />
mm<br />
in.<br />
(1)Not all types and sizes are listed in this catalog. Contact your <strong>Timken</strong> representative <strong>for</strong> further in<strong>for</strong>mation.<br />
(2)For TSL bearings these are the normal tolerances of cone bore. However, bore size can be slightly reduced at large end due to tight<br />
fit assembly of the seal on the rib. This should not have any effect on the per<strong>for</strong>mance of the bearing.<br />
72 TIMKEN MACHINE TOOL CATALOG
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