DIN867 - 基本齿廓.pdf

文档介绍：UDC DEUTSCHE NORM February 1986
The datum line is that straight line on which the tooth thick-
2 Symbols, quantities, units ness is equal to the space width or half the pitch:
Consistent with the provisions of DIN 3960 (June 1984 sp = ep = p/2 (1
draft), the following symbols and quantities are used in the The basic rack tooth profile is enclosed by the addendum
present standard. line which runs parallel with the datum line and the deden-
dum line which runs parallel with the latter.
The basic rack tooth profiles of the cutting tool have been
derived from the basic rack tooth profile of the teeth (see
DIN 3972).
Basic rack tooth profile of the mating gear
(counterpart rack tooth profile)