Needle Roller Bearings - Ntn-snr.com
Needle Roller Bearings - Ntn-snr.com
Needle Roller Bearings - Ntn-snr.com
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Appendix<br />
NTN<br />
Ordinary tolerance for punching, bending and drawing dimensions<br />
Unit : mm<br />
Class<br />
Dimensional division<br />
Class-A Class-B Class-C Class-D Class-E<br />
30 incl.<br />
Over 30 120 incl.<br />
Over 120 315 incl.<br />
Over 315 1000 incl.<br />
Over 1000 2000 incl.<br />
0.1<br />
0.15<br />
0.2<br />
0.3<br />
0.5<br />
0.15<br />
0.25<br />
0.4<br />
0.7<br />
1.1<br />
0.25<br />
0.45<br />
0.6<br />
1.1<br />
1.8<br />
0.4<br />
0.7<br />
1<br />
1.8<br />
3<br />
0.6<br />
1.1<br />
1.6<br />
2.8<br />
4.5<br />
Ordinary tolerance for bending angle<br />
Unit : degree<br />
Type of bending<br />
Class<br />
Class<br />
B, C<br />
Class<br />
D, E<br />
Perpendicular bending<br />
Other bending<br />
1<br />
1.5<br />
2<br />
3<br />
Remarks: The ordinary tolerance for bending angle<br />
shall be applied to Class-A tolerance.<br />
Ordinary tolerance for die casts<br />
JIS B 0409<br />
This Standard specifies the ordinary tolerance for the<br />
as-casted dimensions of zinc allow die casts and<br />
aluminum alloy die casts.<br />
The ordinary tolerance shall be indicated by either one<br />
of the following methods (1) and (2).<br />
(1) Numerical value table for each dimensional division<br />
(2) Applicable standard No. Ex.:JIS B 0409<br />
Ordinary tolerance for dimensions<br />
Unit : mm<br />
Classification by<br />
application<br />
Portions casted by solid die and movable die<br />
Perpendicular to die<br />
split surface l2<br />
Portions casted<br />
by movable core<br />
l2<br />
Dimensional<br />
division<br />
Parallel to<br />
die split<br />
surface<br />
Projected area of castings<br />
perpendicular to die split<br />
surface cm 2<br />
600 and<br />
below<br />
over 600<br />
2400 incl.<br />
Projected area of casting<br />
portion perpendicular<br />
to moving direction of<br />
movable core cm 2<br />
150 and<br />
below<br />
over 150<br />
600 incl.<br />
l1<br />
l2<br />
Die split<br />
surface<br />
30 incl.<br />
0.25<br />
0.5<br />
0.6<br />
0.5<br />
0.6<br />
l2<br />
Over 30 50 incl.<br />
0.3<br />
0.5<br />
0.6<br />
0.5<br />
0.6<br />
l1<br />
Over 50 80 incl.<br />
0.35<br />
0.6<br />
0.6<br />
0.6<br />
0.6<br />
Over 80 120 incl.<br />
0.45<br />
0.7<br />
0.7<br />
0.7<br />
0.7<br />
Over 120 180 incl.<br />
Over 180 250 incl.<br />
Over 250 315 incl.<br />
Over 315 400 incl.<br />
0.5<br />
0.55<br />
0.6<br />
0.7<br />
0.8<br />
0.9<br />
1<br />
<br />
0.8<br />
0.9<br />
1<br />
<br />
0.8<br />
0.9<br />
1<br />
<br />
0.8<br />
0.9<br />
1<br />
<br />
l2<br />
l1<br />
l2<br />
l1<br />
l3<br />
Die split<br />
surface<br />
Over 400 500 incl.<br />
0.8<br />
<br />
<br />
<br />
<br />
Over 500 630 incl.<br />
0.9<br />
<br />
<br />
<br />
<br />
Over 630 800 incl.<br />
1<br />
<br />
<br />
<br />
<br />
Over 800 1000 incl.<br />
1.1<br />
<br />
<br />
<br />
<br />
Note 1) The dimensional tolerance for l1 shall be applied to partial dimension of die split surface which<br />
does not influence the length.<br />
2) “Projected area of castings” means the circumference internal projected area of as-casted<br />
castings.<br />
C-11
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