AT Timing Pulleys
Timing belt pulleys have trapezoidal teeth and commonly used in in automation, robotics, or CNC applications. Grob carries 5mm, 10mm, and 20mm pitch in aluminum, other materials are available upon request. AT pulleys are used in higher torque applications than T pulleys.
AT5 Timing Belt Pulleys Metric Pitch 5mm (.1969″)
| Part Name | No. Teeth | Pitch Dia. | Outside Dia. | Root Dia. |
|---|---|---|---|---|
| 5MM-AT-15 | 15 | .892 | .940 | .896 |
| 5MM-AT-16 | 16 | .954 | 1.002 | .959 |
| 5MM-AT-17 | 17 | 1.017 | 1.065 | 1.022 |
| 5MM-AT-18 | 18 | 1.080 | 1.128 | 1.085 |
| 5MM-AT-19 | 19 | 1.143 | 1.191 | 1.147 |
| 5MM-AT-20 | 20 | 1.205 | 1.253 | 1.210 |
| 5MM-AT-22 | 22 | 1.330 | 1.378 | 1.335 |
| 5MM-AT-25 | 25 | 1.519 | 1.567 | 1.523 |
| 5MM-AT-28 | 28 | 1.706 | 1.754 | 1.711 |
| 5MM-AT-32 | 32 | 1.957 | 2.005 | 1.962 |
| 5MM-AT-36 | 36 | 2.208 | 2.256 | 2.213 |
| 5MM-AT-40 | 40 | 2.458 | 2.506 | 2.463 |
| 5MM-AT-48 | 48 | 2.959 | 3.007 | 2.964 |
| 5MM-AT-60 | 60 | 3.711 | 3.759 | 3.716 |
| 5MM-AT-72 | 72 | 4.463 | 4.511 | 4.468 |
| 5MM-AT-84 | 84 | 5.215 | 5.263 | 5.220 |
| 5MM-AT-96 | 96 | 5.967 | 6.015 | 5.972 |
AT10 Timing Belt Pulleys Metric Pitch 10mm (.3937″)
| Part Name | No. Teeth | Pitch Dia. | Outside Dia. | Root Dia. |
|---|---|---|---|---|
| 10MM-AT-15 | 15 | 1.808 | 1.880 | 1.787 |
| 10MM-AT-16 | 16 | 1.933 | 2.005 | 1.913 |
| 10MM-AT-17 | 17 | 2.059 | 2.130 | 2.038 |
| 10MM-AT-18 | 18 | 2.184 | 2.256 | 2.163 |
| 10MM-AT-19 | 19 | 2.309 | 2.381 | 2.289 |
| 10MM-AT-20 | 20 | 2.435 | 2.506 | 2.414 |
| 10MM-AT-22 | 22 | 2.685 | 2.757 | 2.665 |
| 10MM-AT-25 | 25 | 3.061 | 3.133 | 3.041 |
| 10MM-AT-28 | 28 | 3.437 | 3.509 | 3.417 |
| 10MM-AT-32 | 32 | 3.939 | 4.010 | 3.918 |
| 10MM-AT-36 | 36 | 4.440 | 4.511 | 4.419 |
| 10MM-AT-40 | 40 | 4.941 | 5.013 | 4.920 |
| 10MM-AT-48 | 48 | 5.944 | 6.015 | 5.923 |
| 10MM-AT-60 | 60 | 7.448 | 7.519 | 7.427 |
| 10MM-AT-72 | 72 | 8.951 | 9.023 | 8.930 |
| 10MM-AT-84 | 84 | 10.455 | 10.527 | 10.434 |
| 10MM-AT-96 | 96 | 11.959 | 12.031 | 11.938 |
AT20 Timing Belt Pulleys Metric Pitch 20mm (.7874″)
| Part Name | No. Teeth | Pitch Dia. | Outside Dia. | Root Dia. |
|---|---|---|---|---|
| 20MM-AT-18 | 18 | 4.400 | 4.511 | 4.328 |
| 20MM-AT-19 | 19 | 4.651 | 4.762 | 4.579 |
| 20MM-AT-20 | 20 | 4.902 | 5.013 | 4.830 |
| 20MM-AT-22 | 22 | 5.403 | 5.514 | 5.331 |
| 20MM-AT-25 | 25 | 6.155 | 6.266 | 6.083 |
| 20MM-AT-28 | 28 | 6.907 | 7.018 | 6.835 |
| 20MM-AT-32 | 32 | 7.909 | 8.020 | 7.837 |
| 20MM-AT-36 | 36 | 8.912 | 9.023 | 8.840 |
| 20MM-AT-40 | 40 | 9.915 | 10.026 | 9.843 |
| 20MM-AT-48 | 48 | 11.920 | 12.031 | 11.848 |
| 20MM-AT-60 | 60 | 14.927 | 15.038 | 14.855 |
| 20MM-AT-72 | 72 | 17.935 | 18.046 | 17.863 |
| 20MM-AT-84 | 84 | 20.943 | 21.054 | 20.870 |
| 20MM-AT-96 | 96 | 23.950 | 24.061 | 23.878 |