Recommended Drive Wheel Size for Motors with VFD

Choose drive-wheel diameter for the belt-speed range, clearance and work you need—not simply the largest wheel available.

Diameter changes speed

At the same motor RPM, a larger drive wheel produces a higher belt speed. That does not create extra motor power or guarantee more force at the belt.

Check the complete setup

• Required belt speed for your abrasive, material and attachment.
• Motor/VFD operating limits and the speed range you actually need.
• Wheel bore/keyway compatibility with the motor shaft.
• Clearance to the base, chassis and other components.

A spacer may be needed for some large-wheel/motor combinations; confirm the fit for your model before purchase. Small-wheel attachments can require substantially reduced belt speed.

Use Calculating Belt Speed on Your 2x72 Grinder and the Belt Speed Calculator. For a setup check, email the grinder model, motor label and proposed wheel size to support@diktatorgrinder.com.