Rir se Thls speclflcatlon psrtalns to the standardlratlan of fool holders-baslc foi numalcally
&ad machlne tools. The requlrements cmtalned hereln are Intended ta provlde a hlgh degree
of tool holder Interchongeablllty between mochlne tools of varlaus types wlthln the same class-
Iflcatlon In terms of slre, torque, RPM, accuracy, etc.
AIA/NAS NAS 970-1970 history
1970AIA/NAS NAS 970-1970 Tool Holders - Basic for Numerically Controlled Machine Tools (Rev. 2)