ISO 3912:1977 pdf download.Woodruff keys and keyways.ISO 3912 pdf can be downloaded here.
This International Standard specifies the dimensional characteristics of Woodruff keys and of the alternative Whitney key and of the corresponding keyways In shaft and hub. It also gives the relationship to be observed between the diameter of the shaft and the section of the key for both torque transmission and positional applications.
2 FIELD OF APPLICATION
This International Standard is intended for general application to cylindrical shafts and cylindrical shaft ends.
3 DIMENSIONS AND TOLERANCES OF KEYS
See the figures and table 1 on page 2.
4 MATERIAL
Steel havin9 a tensile strength of not less than 590 N/mm2 in the finished condition, unless otherwise agreed between the interested parties.
5 SHAPE, DIMENSIONS AND TOLERANCES OF KEYWAYS
See the figure and table 2 on page 3.
6 RELATIONSHIP OF SHAFT DIAMETER TO KEY SIZE
Two series of relationships between shaft diameter and key size are given in table 3, page 4 : series 1 for torque applications and series 2 for positional applications (for example where, as in the case of an interference fit, the torque is not transmitted through the key but through the shaft/hub interface).
7 DESIGNATION
A woodruff key shall be designated by its width and its height and by reference to this International Standard.ISO 3912:1977 pdf download.