NA 121

DIN Standards Committee Tools and Clamping Devices

DIN 4000-143 [Withdrawn] references following documents:

Document number Edition Title
DIN 3968 1960-09 Tolerances for Single-start Hobs for Involute Spur Gears More 
DIN 3999 1974-11 Gear notation; symbols More 
VDI 3323 1996-02 Information on applicability of hard cutting materials for machining by chip removal More