This International Standard specifies the dimensions of parallel shank socket reamers and taper shank socket reamers manufactured to produce self-holding taper sockets for self-holding taper shanks of the following designations, and which are in accordance with ISO/R 296 :

• metric Tapers No. 4 and No. 6;
• Morse Tapers No. 0 to 6 inclusive.

Values are given, in millimetres and inches, for the following dimensions of these tools:

• gauge plane diameter d;
• overall length L;
• cutting edge length l;
• distance from gauge plane to tool end l₁;
• diameter of shank d₁, or Morse taper shank size.

The taper on diameter is also shown.

The shanks and driving squares of the tools are in accordance with ISO/R 237.

The Morse taper shanks are in accordance with ISO/R 296.

Unless otherwise stated these reamers will be right hand cutting.