ISO 3912:1977 Preview
Woodruff keys and keyways
This standard was last reviewed and confirmed* in 2015.
*Therefore this version remains current
Is intended for the general application to cylindrical shafts and shafts ends, and gives the relationship which should be observed between the diameter of shaft and the section of key. Steel with a tensile strength of 590 N/mm is defined as the material to be used.