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 Number | 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 Number | 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 Number | 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 |
How to Request a Timing Belt Pulley Quote
When requesting a quote for timing belt pulleys from Grob Inc., please include as much of the following as possible:
- Timing Belt Pulley Number
- Don’t see a timing belt pulley that fits your need? We do custom timing belt pulleys as well!
- Material
- All Grob Standard timing belt pulleys are stocked in 1117 mild steel and 4140, but other materials are available
- If you need a specific material, or would like to discuss with a Grob rep – just let us know!
- Length
- All Grob Standard timing belt pulleys are sold by the foot
- List the lengths & number of pieces you require in your request
Example:
- timing belt pulley number: 5MM-AT-15
- Specifications for each standard timing belt pulley
can be found in the table above - This example is a 5/15 diameter pitch, 10 tooth
- Specifications for each standard timing belt pulley
- Material: 1117 mild steel
- Length & #: 2 pieces; 3ft each
- Order: 2x, 3ft, 5MM-AT-15-1117
Placing all of this information in your quote request, which can be simplified: 2x, 3ft, 5MM-AT-15-1117 will ensure that our team can get you the most accurate quote as quickly as possible.
