Shaft Design Factors: keyway
Shaft design reference data — ANSI B17.1 keyway dimensions, ANSI B27.7 retaining ring groove dimensions, and ANSI B92.1 spline stress concentration factors for shaft design per Shigley's and Peterson's
| feature type | shaft dia over in | Kt bending (dimensionless) | Kt torsion (dimensionless) | fillet radius in (in) | hub keyseat depth in (in) | key height in (in) | key width in (in) | notes | shaft dia to in (in) | shaft keyseat depth in (in) | standard |
|---|---|---|---|---|---|---|---|---|---|---|---|
| keyway | 0.25 | 1.6 | 3 | 0.01 | 0.066 | 0.125 | 0.125 | Square key; Kt per Shigley 10th ed Table 7-1; profile/end-mill keyseat | 0.5 | 0.126 | ANSI B17.1-1967 (R1998) |
| keyway | 0.5 | 1.6 | 3 | 0.01 | 0.094 | 0.1875 | 0.1875 | 3/16 square key; shaft dia over 1/2 to 3/4 | 0.75 | 0.189 | ANSI B17.1-1967 (R1998) |
| keyway | 0.75 | 1.6 | 3 | 0.01 | 0.121 | 0.25 | 0.25 | 1/4 square key; shaft dia over 3/4 to 1 | 1 | 0.251 | ANSI B17.1-1967 (R1998) |
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