NBN ISO 4202:2021

This document specifies the dimensions of reduction sleeves with external 7/24 taper (Nos. 30, 40, 45,
50 and 60) for tools with Morse taper shanks (Nos. 1 to 6).
All these sleeves allow driving of tools having Morse taper shanks which have a tenon at the small end
of the shank; some sleeves allow driving of tools having Morse taper shanks which have an axially
tapped hole in the shank:
— with the use of an incorporated screw for sleeves 30 × 1 – 40 × 1 – 40 × 2 – 45 × 1 – 45 × 2 – 45 × 3 –
50 × 2 – 50 × 3 – 50 × 4 – 60 × 3 – 60 × 4 – 60 × 5;
— with the use of a draw bar for sleeves 30 × 1 – 30 × 2 – 40 × 1 – 40 × 2 – 40 × 3 – 45 × 1 – 45 × 2 –
45 × 3 – 45 × 4 – 50 × 2 – 50 × 3 – 50 × 4 – 50 × 5 – 60 × 3 – 60 × 4 – 60 × 5 – 60 × 6.
Morse tapers conform to ISO 296 while 7/24 tapers are in accordance with ISO 297.