Isoprecision - Glossary - Technical

Glossary - ISO Precision

In relation to bearings, ISO Precision is a system of tolerances set by ISO comparable to the ABEC precision system.

The ISO sytem is not directly interchangable with ABEC, but the scales are fairly close.

The following are general approximations of ISO versus ABEC precision. Tables should be consulted for the exact values.

  • Abec 1 : ISO P0 (Standard Precision Grade)
  • Abec 3 : ISO P6
  • Abec 5 : ISO P5
  • Abec 7 : ISO P4
  • Abec 9 : ISO P2

Technical Index Glossary Index

You can find precision products in the Hobby and Engineering Supplies Precision Products Online Catalogue pages.


For a huge range of bearings online please visit the Bearing Shop Online Website.

The Small Parts and Bearings has a much larger range of engineering supplies.

For the best range of miniature and small bearings please try the Miniature Bearings Australia website. Miniature Bearings Australia also list a large variety of miniature engineering products.



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