Page 339 - needle bearings

Appendix
NTN

Ordinary tolerance for punching, bending and drawing dimensions Ordinary tolerance for bending angle
Unit : mm Unit : degree
Class Class Class Class
Class-A Class-B Class-C Class-D Class-E B, C D, E
Dimensional division Type of bending
30 incl. ʶ0.1 ʶ0.15 ʶ0.25 ʶ0.4 ʶ0.6 Perpendicular bending ʶ1 ʶ2
Over 30 120 incl. ʶ0.15 ʶ0.25 ʶ0.45 ʶ0.7 ʶ1.1 Other bending ʶ1.5 ʶ3
Over 120 315 incl. ʶ0.2 ʶ0.4 ʶ0.6 ʶ1 ʶ1.6 Remarks: The ordinary tolerance for bending angle
shall be applied to Class-A tolerance.
Over 315 1000 incl. ʶ0.3 ʶ0.7 ʶ1.1 ʶ1.8 ʶ2.8
Over 1000 2000 incl. ʶ0.5 ʶ1.1 ʶ1.8 ʶ3 ʶ4.5

Ordinary tolerance for die casts
JIS B 0409
This Standard specifies the ordinary tolerance for the
as-casted dimensions of zinc allow die casts and
aluminum alloy die casts.
The ordinary tolerance shall be indicated by either one
of the following methods (1) and (2).
(1) Numerical value table for each dimensional division
(2) Applicable standard No. Ex.:JIS B 0409

Ordinary tolerance for dimensions Unit : mm
Classification by Portions casted by solid die and movable die Portions casted
application Perpendicular to die by movable core
split surface ʣ l2 l2
Projected area of castings Projected area of casting
Parallel to portion perpendicular
perpendicular to die split
die split to moving direction of
surface ʣ cm 2 movable core cm 2 Die split
surface l1 surface
Dimensional 600 and over 600 150 and over 150
division below 2400 incl. below 600 incl. l2
l2
30 incl. ʶ0.25 ʶ0.5 ʶ0.6 ʶ0.5 ʶ0.6
Over 30 50 incl. ʶ0.3 ʶ0.5 ʶ0.6 ʶ0.5 ʶ0.6 l1
Over 50 80 incl. ʶ0.35 ʶ0.6 ʶ0.6 ʶ0.6 ʶ0.6
Over 80 120 incl. ʶ0.45 ʶ0.7 ʶ0.7 ʶ0.7 ʶ0.7
Over 120 180 incl. ʶ0.5 ʶ0.8 ʶ0.8 ʶ0.8 ʶ0.8
l1
Over 180 250 incl. ʶ0.55 ʶ0.9 ʶ0.9 ʶ0.9 ʶ0.9
l3 Die split
l1
Over 250 315 incl. ʶ0.6 ʶ1 ʶ1 ʶ1 ʶ1 surface
l2
l2
Over 315 400 incl. ʶ0.7 ɹʵ ɹʵ ɹʵ ɹʵ
Over 400 500 incl. ʶ0.8 ɹʵ ɹʵ ɹʵ ɹʵ
Over 500 630 incl. ʶ0.9 ɹʵ ɹʵ ɹʵ ɹʵ
Over 630 800 incl. ʶ1 ɹʵ ɹʵ ɹʵ ɹʵ
Over 800 1000 incl. ʶ1.1 ɹʵ ɹʵ ɹʵ ɹʵ
Note 1) The dimensional tolerance for l1 shall be applied to partial dimension of die split surface which
does not influence the length.
2) “Projected area of castings” means the circumference internal projected area of as-casted
castings.

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