| AGMA quality number* |
DIN Number** |
Number of teeth and pitch diameter |
Diametral pitch range |
Tooth-to-tooth composite error tolerance |
Total composite error tolerances |
| 6 | 12 | Up to 20 teeth incl. Over 20 teeth up to 1.999" Over 20 teeth 2" to 3.999" |
20 to 200 20 to 48 20 to 32 |
0.0027 0.0019 0.0019 |
0.0037 0.0037 0.0044 |
| 7 | 11 | Up to 20 teeth incl. Over 20 teeth up to 1.999” Over 20 teeth 2" to 3.999” |
20 to 200 20 to 100 20 to 48 |
0.0019 0.0014 0.0014 |
0.0027 0.0027 0.0032 |
| 8 | 10 | Up to 20 teeth incl. Over 20 teeth up to 1.999” Over 20 teeth 2" to 3.999” |
20 to 200 20 to 200 20 to 100 |
0.0014 0.0010 0.0010 |
0.0019 0.0019 0.0023 |
| 9 | 9 | Up to 20 teeth incl. Over 20 teeth up to 1.999” Over 20 teeth 2" to 3.999” |
20 to 200 20 to 200 20 to 200 |
0.0010 0.0007 0.0007 |
0.0014 0.0014 0.0016 |
| 10 | 8 | Up to 20 teeth incl. Over 20 teeth up to 1.999” Over 20 teeth 2" to 3.999” |
20 to 200 20 to 200 20 to 200 |
0.0007 0.0005 0.0005 |
0.0010 0.0010 0.0012 |
*From AGMA “Gear Classification Manual for Spur, Helical and herringbone Gears,” AGMA 390.02, Sept. 1964.
**DIN. Quality numbers shown are approximately equal to corresponding AGMA number.
Our design and engineering staff can assist you on design solutions, material selection and tolerance considerations or answer any questions you may have. Call us at 510-782-9226 or email us.