WOODRUFF KEY SIZES AND DIMENSIONS

Woodruff key is almost in semicircular disk shape with uniform thickness and it's a demountable machinery part that provides means for transmitting torque between the shaft and hub. Woodruff key sizes, dimensions and tolerances are covered in ASME B17.2 standard and this page has been prepared according to this standard.



Calculator:

INPUT PARAMETERS
Key Number

 


Dimensions of Woodruff Keys
RESULTS
Parameter Symbol Value Unit
Key No1 --- --- ---
Nominal Key Size W x B --- inch
Actual Length2 F ---
Maximum Key Height Cmax ---
Minimum Key Height Cmin ---
Maximum Key Height Dmax ---
Minimum Key Height Dmin ---
Distance below Center E ---

Note 1 : The last two digits of the key number give the nominal diameter B in eighths of an inch and the digits preceding the last two give the nominal width W in thirty-seconds of an inch. Ex: No. 1212 indicates a key 12/32 x 12/8 or 3/8 x 1-1/2

Note 2 : Length tolerance : +0.000  -0.010 .

Reference:
  • Oberg, E. , Jones ,F.D. , Horton H.L. , Ryffel H.H., (2016) . Machinery's Handbook . 30th edition.  Industrial Press Inc.
  • Oberg, E. , Jones ,F.D. , Horton H.L. , Ryffel H.H., (2012) . Machinery's Handbook . 29th edition.  Industrial Press Inc.
  • ASME B17.2-1967, Woodruff Keys and Keyseats