Shaft Design Factors: spline
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) | notes | shaft dia to in (in) | standard |
|---|---|---|---|---|---|---|
| spline | 0.75 | 1.3 | 1.8 | 10-tooth involute spline; 16/32 diametral pitch; Class A (loose) side fit; Kt per Shigley Sec 7-3 | 1.5 | ANSI B92.1-1996 |
| spline | 1.5 | 1.3 | 1.8 | Larger involute spline; 8/16 diametral pitch; 16 teeth; Class B (medium) fit | 3 | ANSI B92.1-1996 |
| spline | 3 | 1.3 | 1.8 | Heavy involute spline; 4/8 diametral pitch; 20 teeth; Class C (tight) fit | 6 | ANSI B92.1-1996 |
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