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ISO 3912 Standard Dimensions for Woodruff Keys

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Woodruff keys and keyways

The norm applys 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.

 

Dimensional Drawing and Technical Diagrams

452_ZBWPTE_iso-3912.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source ISO 3912

Publication date: 06/1977
b nom max 1 1.5 2 2 2.5 3 3 4 4

b min

 0.975 1.475 1.975 1.975 2.475 2.975 2.975 3.97 3.97
d2 min 3.88 6.85 6.85 9.85 9.85 12.82 15.82 15.82 18.79
d 2 max 4 7 7 10 10 13 16 16 19
h min 1.34 2.54 2.54 3.625 3.625 4.925 6.41 6.41 7.41
h max) 1.4 2.6 2.6 3.7 3.7 5 6.5 6.5 7.5

Dimensions in mm - source ISO 3912

Publication date: 06/1977
b nom max 5 5 5 6 6 8 10

b min

 4.97 4.97 4.97 5.97 5.97 7.964 9.964
d2 min 15.82 18.79 21.79 21.79 24.79 27.79 31.75
d2 max 16 19 22 22 25 28 32
h min 6.41 7.41 8.91 8.91 9.91 10.89 12.89
h max 6.5 7.5 9 9 10 11 13

Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
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