Draft International Standard
ISO/DIS 21771-2
Cylindrical involute gears and gear pairs — Part 2: Calculation and measurement of tooth thickness and backlash
Reference number
ISO/DIS 21771-2
Edition 1
International Standard
Read sample
ISO/DIS 21771-2
This Draft International Standard is in the enquiry phase with ISO members.

ISO/DIS 21771-2

ISO/DIS 21771-2
CHF 129
Convert Swiss francs (CHF) to your currency


This standard establishes the calculation procedures for determining specification limits for external and
internal cylindrical involute gearing with constant gear ratio when the desired tooth thickness is known.
This standard also shows the relationships between backlash and the tooth thickness, centre distance,
and tooth deviations in a pinion and gear mesh.

General information

  •  : Under development
    : Close of voting [40.60]
  •  : 1
     : 138
  • ISO/TC 60
  • RSS updates

Got a question?

Check out our Help and Support

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)