This pulley is specially-made for use with our Viper Dual Disc Vertical Spinner Add-On (coming soon).
Use it to replace damaged ones, stock up on spares, or for your own creation!
It can be used with any of our 4mm wide
S3M timing belts.
Specifications: - 30T 3mm pitch S3M pulley
- Material: 6061-T6 aluminum anodized red
- Bore: 4mm (0.157in)
- Belt width: 4mm (0.157in)
- Width: 7.3mm (0.287in)
- Steel flange OD: 32mm (1.26in)
- Weight: 13.8g (0.49oz)
- Includes a 6-32 x 3/8in setscrew for securing pulley onto a 4mm shaft, and four 6-32 threaded mounting holes equally spaced on a 17mm (0.70in) circle, for mounting our
Weapon Bars and Discs.

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!
