WOODRUFF KEY SIZES AND DIMENSIONS

Woodruff key sizes, dimensions and tolerances are given in the following chart according to ASME B17.2 standard.

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:

INPUT PARAMETERS
Key Number	202 202.5 302.5 203 303 403 204 304 404 305 405 505 605 406 506 606 806 507 607 707 807 608 708 808 1008 1208 609 709 809 1009 610 710 810 1010 1210 811 1011 1211 812 1012 1212

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RESULTS
Parameter	Value
Key No1	---	---
Nominal Key Size [W x B]	---	inch
Actual Length [F]2	---
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