Woodruff keys, inch (ANSI B17.2): key numbers #202 to #1212, key sizes and keyseat depths

sizes

41 in table

Notes

• A Woodruff key is a segment of a disc: a round bottom that sits in a seat cut with a woodruff cutter, and a flat top. The key number codes the size: the last two digits are the disc diameter B in eighths of an inch, the digits before them are the width W in thirty-seconds. Key No. 404 is 4/32 × 4/8 = 1/8 × 1/2 in; No. 1212 is 12/32 × 12/8 = 3/8 × 1-1/2 in. Nos. 202.5 and 302.5 carry a half-eighth: 5/16 in diameter.
• Files: for each of the 41 key numbers, one key solid and one example shaft with its keyseat. The key is the part of a disc of diameter B that lies below a flat chord E under the disc centre, so its height is B/2 − E. That reproduces the printed length F (the chord) and the printed height C for all 41 sizes. Two heights are printed (C and D); the files use C. McMaster's listing gives D as the key height; the two differ by at most 0.009 in.
• The seat is a circle of the cutter diameter (modelled at the nominal B; the table gives the cutter range F min – max), the nominal key width wide, with its bottom at the published depth B below the top line of the shaft, measured along the seat centre line. Depth tolerance +.005 / −0. Shaft diameter is not tied to the key in the tables used here, so the example shafts in the files are the same diameter as the key disc; pick the key for your shaft from the maker's selection guidance and treat the example diameter as a placeholder.
• Cross-checks: shaft depth + key above shaft = the minimum key height C; shaft depth + hub depth = the maximum C (to within 0.001 in). Key width, diameter, length and D height of all 41 keys agree with McMaster's key listing. Length tolerance +.000 / −.010 in. Hub seat depth tolerance +.005 / −0; hub width +.002 / −0.
• Left out: the longer keys (Nos. 617 to 2428, 2-1/8 to 3-1/2 in diameter), which only the keyseat table lists, with no key-height table or second source to check them; shaft-diameter ranges per key, which neither source prints; edge chamfers or radii, which the tables do not give.

Woodruff keys, inch (ANSI B17.2): key numbers #202 to #1212, key… size chart

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Free files

★ Free files 41 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

Plain text: sheet.txt · JSON: /api/geometry?object=woodruff-keys-inch-ansi-b17-2

Fits with

Free

Woodruff keys, metric (DIN 6888 / ISO 3912): b × h × d2, keyseat depths t1 and t2, shaft ranges24 sizes★ 48 filesFree

Square keys, inch (ANSI B17.1): 3/32 to 1/2 in7 sizes★ 35 filesFree

Parallel keys DIN 6885 form A: 2 × 2 to 18 × 11, with keyway depths11 sizes★ 150 filesFree

Shaft Ø8 × 100 with a 2 × 1 keyway (60 mm)8.0×8.0×100.0 mm★ 1 file