Needle Roller Bearings by NTN Corporation Japan

More catalogs by NTN Corporation Japan | Needle Roller Bearings | 349 pages | 2006-11-15

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Page 340 of Needle Roller Bearings

appendix ntn ordinary tolerance for punching bending and drawing dimensions unit mm ordinary tolerance for bending angle unit degree class dimensional division 30 incl over 30 120 incl over 120 315 incl over 315 1000 incl over 1000 2000 incl class-a 0.1 0.15 0.2 0.3 0.5 class-b class-c class-d class-e 0.15 0.25 0.4 0.7 1.1 0.25 0.45 0.6 1.1 1.8 0.4 0.7 1 1.8 3 0.6 1.1 1.6 2.8 4.5 class type of bending perpendicular bending other bending class b c 1 1.5 class d e 2 3 remarks the ordinary tolerance for bending angle shall be applied to class-a tolerance 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 classification by application portions casted by solid die and movable die perpendicular to die l2 split surface unit mm portions casted by movable core l2 dimensional division 30 incl over 30 50 incl over 50 80 incl over 80 120 incl over 120 180 incl over 180 250 incl over 250 315 incl over 315 400 incl over 400 500 incl over 500 630 incl over 630 800 incl over 800 1000 incl projected area of casting parallel to projected area of castings portion perpendicular perpendicular to die split to moving direction of die split 2 surface cm movable core cm2 surface 600 and 150 and over 600 over 150 below below 2400 incl 600 incl l1 l2 l2 l1 die split surface 0.25 0.3 0.35 0.45 0.5 0.55 0.6 0.7 0.8 0.9 1 1.1 0.5 0.5 0.6 0.7 0.8 0.9 1 0.6 0.6 0.6 0.7 0.8 0.9 1 0.5 0.5 0.6 0.7 0.8 0.9 1 0.6 0.6 0.6 0.7 0.8 0.9 1 l1 l2 l2 l1 l3 die split surface 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 c-11