NTN - Large Bearings
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Bearing Fits<br />
Table 4.6 Fits for inch series tapered roller bearing (ANSI class 3 and 0)<br />
Table 4.6. (1) Fit with shaft<br />
Unit m<br />
Cone bore<br />
Shaft diameter tolerance<br />
Shaft tolerance Extreme fits 1<br />
Load conditions d mm<br />
∆ds<br />
over incl. high low high low max min<br />
Precision<br />
machine tool 304.8<br />
304.8<br />
609.6<br />
+13<br />
+25<br />
0<br />
0<br />
+<br />
+<br />
30<br />
64<br />
+<br />
+<br />
18<br />
38<br />
30T<br />
64T<br />
<br />
<br />
5T<br />
13T<br />
spindles 609.6 914.4 +38 0 + 102 + 64 102T 26T<br />
Heavy loads,<br />
or high speed<br />
or shock<br />
76.2<br />
304.8<br />
609.6<br />
304.8<br />
609.6<br />
914.4<br />
+13<br />
+25<br />
+38<br />
0<br />
0<br />
0<br />
Use minimum tight cone fit<br />
of 0.25m/mm 0.00025 inch/inch<br />
of cone bore.<br />
Rotating cone load<br />
Stationary<br />
cone load<br />
Precision<br />
machine tool<br />
spindles<br />
304.8<br />
304.8 609.6<br />
609.6 914.4<br />
+13<br />
+25<br />
+38<br />
0<br />
0<br />
0<br />
+ 13<br />
+ 25<br />
+ 102<br />
0<br />
0<br />
0<br />
30T<br />
64T<br />
102T<br />
<br />
<br />
<br />
5T<br />
13T<br />
26T<br />
Note: Must be applied for maximum bore dia. 241.300mm (9.500 inch) in case of class 0 product.<br />
Table 4.6 (2) Fit with housing<br />
Stationary cup load<br />
Load conditions<br />
Rotating<br />
cup load<br />
Floating<br />
Clamped<br />
Adjustable<br />
Nonadjustable<br />
or in carriers<br />
Nonadjustable<br />
or in carriers<br />
Housing bore<br />
diameter<br />
Cup O.D.<br />
tolerance<br />
Housing bore<br />
tolerance<br />
1<br />
Extreme fits<br />
D mm<br />
∆Ds<br />
over incl. high low high low max min<br />
152.4<br />
304.8<br />
609.6<br />
152.4<br />
304.8<br />
609.6<br />
152.4<br />
304.8<br />
609.6<br />
152.4<br />
304.8<br />
609.6<br />
152.4<br />
304.8<br />
609.6<br />
152.4<br />
304.8<br />
609.6<br />
914.4<br />
152.4<br />
304.8<br />
609.6<br />
914.4<br />
152.4<br />
304.8<br />
609.6<br />
914.4<br />
152.4<br />
304.8<br />
609.6<br />
914.4<br />
152.4<br />
304.8<br />
609.6<br />
914.4<br />
+13<br />
+13<br />
+25<br />
+38<br />
+13<br />
+13<br />
+25<br />
+38<br />
+13<br />
+13<br />
+13<br />
+38<br />
+13<br />
+13<br />
+25<br />
+38<br />
+13<br />
+13<br />
+25<br />
+38<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
+<br />
+<br />
+<br />
+<br />
+<br />
+<br />
+<br />
+<br />
+<br />
+<br />
+<br />
+<br />
-<br />
-<br />
-<br />
-<br />
38<br />
38<br />
64<br />
89<br />
25<br />
25<br />
51<br />
76<br />
13<br />
13<br />
25<br />
38<br />
0<br />
0<br />
0<br />
0<br />
13<br />
13<br />
13<br />
13<br />
+<br />
+<br />
+<br />
+<br />
+<br />
+<br />
+<br />
+<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
-<br />
25<br />
25<br />
38<br />
51<br />
13<br />
13<br />
25<br />
38<br />
0<br />
0<br />
0<br />
0<br />
13<br />
25<br />
25<br />
38<br />
25<br />
38<br />
38<br />
51<br />
12L<br />
12L<br />
13L<br />
13L<br />
0<br />
0<br />
0<br />
0<br />
13T<br />
13T<br />
25T<br />
38T<br />
26T<br />
38T<br />
50T<br />
76T<br />
38T<br />
51T<br />
63T<br />
89T<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
38L<br />
38L<br />
64L<br />
89L<br />
25L<br />
25L<br />
51L<br />
76L<br />
13L<br />
13L<br />
25L<br />
38L<br />
0<br />
0<br />
0<br />
0<br />
13T<br />
13T<br />
13T<br />
13T<br />
Type of fit<br />
loose fit<br />
tight<br />
interference fit<br />
tight fit<br />
Unit m<br />
1 T= tight, L= loose<br />
Note: Must be applied for maximum cup OD 304.800mm (12.000 inch) in case of class 0 product.<br />
A-28
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