We are transitioning to red anodized pulleys! Each size's picture will update as we sell out of the silver ones.
Our specialty Timing Pulleys and Belts are the perfect solution for transmitting power from motors to wheels or shafts.
While O-Rings and round belts will slip under tension, timing belts have teeth that ensure a positive lock to the pulleys.
A range of ten pulley sizes means there are 55 different ratio combinations to choose from!
Use with our selection of
FingerTech timing belts, or any other 3mm pitch belt (4mm wide or less).
Try our
Pulley-Belt Distance Calculator! Pick from our available pulley and belt sizes and it will tell you how far apart they will be, OR plug in your desired distance and it will tell you which belt to use!
Pitch (distance between tooth centers): 3mm
Belt Width (maximum): 4mm
Material: 6061 Aluminum
Sizes: 9 Teeth - 42 Teeth (see Size Chart for dimensions)
Bore: 3mm (9T, 15T and 16T can be drilled up to 5/32", larger pulleys can be drilled up to 1/4")
Includes 4-40 setscrew for fastening to shaft
Setscrew requires
0.050" hex wrench 
| # Teeth |
Pitch Diameter (for calculating centers) |
Outside Tooth Diameter |
Weight |
| 9T |
8.59mm (.338") |
7.89mm (.313") |
1.4g (0.05oz) |
| 15T |
14.32mm (.564") |
13.56mm (.534") |
3.3g (0.11oz) |
| 16T |
15.28mm (.602") |
14.52mm (.572") |
4.0g (0.13oz) |
| 18T |
17.19mm (.677") |
16.43mm (.647") |
5.3g (0.18oz) |
| 22T |
21.01mm (.827") |
20.25mm (.797") |
7.8g (0.28oz) |
| 26T |
24.83mm (.977") |
24.07mm (.947") |
10.5g (0.38oz) |
| 30T |
28.65mm (1.128") |
27.89mm (1.098") |
13.5g (0.48oz) |
| 34T |
32.47mm (1.278") |
31.71mm (1.248") |
16.3g (0.55oz) |
| 38T |
36.29mm (1.429") |
35.53mm (1.399") |
21.0g (0.73oz) |
| 42T |
40.11mm (1.579") |
39.34mm (1.549") |
26.3g (0.90oz) |
Pulley Size Chart (mm)
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•Belt Width (maximum): 4mm
•Sizes: 9 Teeth - 42 Teeth
•Bore: 3mm (9T, 15T and 16T can be drilled up to 5/32", larger pulleys can be drilled up to 1/4"))
