ISO 521:2011
ISO 521:2011
Status : Published (Under review)
This standard was last reviewed and confirmed in 2022. Therefore this version remains current.
Format Language
std 1 40 PDF
std 2 40 Paper
  • CHF40
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ISO 521:2011 specifies the dimensions of machine chucking reamers with cylindrical shanks and Morse taper shanks.

It deals with the following types of reamer:

  • machine chucking reamers with cylindrical shanks in the range from 1,32 mm to 20 mm diameter;
  • machine chucking reamers with Morse taper shanks in the range from 5,30 mm to 50 mm diameter.

For each type of reamer, ISO 521:2011 gives two tables, one showing preferred sizes with corresponding dimensions, and the other being a general table set out as functions of diameter steps. Provision is also made for tolerances on lengths, cutting diameters and the diameters of cylindrical shanks.

General information

  •  : Published
     : 2011-10
    : International Standard confirmed [90.93]
  •  : 2
     : 6
  • ISO/TC 29/SC 9
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