Gemmasta 3 Step Pulley Set

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Gemmasta 3 Step Pulley Set

This is a matched pair of Gemmasta 3 speed pulleys. They are designed so that the drive belt is the same length at any of the three speeds meaning that the motor can be bolted into a fixed position.

These shaft pulleys have a bore of 1 Inch (25.40mm)  and are designed to suit the Gemmasta Pro Cabbers and the updated Gemmasta GMP8 Grinders with a 1 inch shaft.

With this pulley set your single speed Pro Cabber can be converted to a 3 speed machine.

With a 1410 RPM motor the speeds are:




This gives you the following Feet per Second depending on the wheel diameter of the machine with the following pulley sizes:

Driven Shaft: 2 Inch Pulley

Motor Puley:

4 Inch Diameter Wheels :3 Inch Pulley

6 Inch Diameter Wheels :2.5 Inch Pulley

8 Inch Diameter Wheels :2 Inch Pulley

Feet Per Second (Fps)

               Fast        Medium      Slow

4 Inch     2085        1476        800

6 Inch     3127        2215        1256

8 Inch     4170        2953        1675

The Gemmasta motor pulley has a 14mm bore and is designed to fit a standard metric frame motor with a 14mm shaft.

The pulleys each have a keyway and are supplied with the correct size grub screw.

These pulleys DO NOT fit the older style Gemmasta machines with a 3/4 Inch Shaft!

A genuine Gemmasta part.

Made in Australia


Brand Gemmasta
Shipping Weight 0.9000kg
Shipping Width 0.100m
Shipping Height 0.140m
Shipping Length 0.100m
Shipping Cubic 0.001400000m3
Unit Of Measure ea
Assembled Length 0.095m
Assembled Height 0.048m
Assembled Width 0.095m

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