Choosing the Right Drive Wheel Size for Your 2x72 Belt Grinder
Drive-wheel diameter sets belt speed together with motor RPM. Choose a diameter that fits the machine and gives the speed range required for your tasks.
Example speeds at 3,450 RPM
| Wheel diameter | Approx. SFM | Approx. MPH |
|---|---|---|
| 4 in. | 3,613 | 41.1 |
| 5 in. | 4,516 | 51.3 |
| 6 in. | 5,419 | 61.6 |
| 7 in. | 6,322 | 71.8 |
These are calculated examples, not recommended operating speeds for every belt or attachment. Actual speed depends on motor RPM.
Before choosing a wheel
- Confirm the bore/keyway matches your motor shaft.
- Check chassis/base clearance and whether a spacer is required.
- Confirm motor/VFD and accessory operating limits.
- For small wheels or sharpening, confirm the setup can reach the required lower speed.
See Calculating Belt Speed on Your 2x72 Grinder, Recommended Drive Wheel Size for Motors with VFD and Small Wheel Speed Safety. Ask support@diktatorgrinder.com if you need help matching a wheel to an existing motor.
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