This standard BS 1660-9:1988 Machine tapers is classified in these ICS categories:
25.060.20 Dividing and tool-workpiece holding devices
This International Standard specifies a dimensioning system, with numerical values of the dimensions in millimetres and inches, for cotter slots with 5 % taper keys for Morse tapers, outside and inside, and for reduction sleeves, intended for fixing tools on machine tools.
Specifies a dimensioning system for slots with 5% taper keys for Morse tapers, outside and inside, and for reduction sleeves.