scope:

NEN-ISO 4202 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.