| Tooth Nominal Pitch (P) | Tolerance Class | Allowance (es) | Effective Space Width Tolerance (T) | Over-Pin Measurement | |------------------------|----------------|----------------|--------------------------------------|----------------------| | 16/32 | 5 | 0.0000 | 0.0022 | 0.1234 / 0.1256 | | 20/40 | 6 | -0.0008 | 0.0028 | 0.0987 / 0.1012 | | 24/48 | 7 | -0.0012 | 0.0035 | 0.0800 / 0.0825 |
: The standard covers three primary pressure angles: 30∘30 raised to the composed with power , 37.5∘37.5 raised to the composed with power , and 45∘45 raised to the composed with power . ansi b 92.1 pdf 38
The ANSI B92.1 standard is a copyrighted publication managed by the American National Standards Institute (ANSI) and the Society of Automotive Engineers (SAE). | Tooth Nominal Pitch (P) | Tolerance Class