Motor selection for grinding machines is not determined only by horsepower (HP), but also depends on wheel size, grinding amount, workpiece material, contact area, and operating method.
| Wheel Diameter | Recommended Motor Power | kW |
|---|---|---|
| 150~200 mm (6"~8") | 0.5~1 HP | 0.37~0.75 kW |
| 250~300 mm (10"~12") | 1~3 HP | 0.75~2.2 kW |
| 350~400 mm (14"~16") | 5~7.5 HP | 3.7~5.5 kW |
| 500~600 mm (20"~24") | 10~15 HP | 7.5~11 kW |
| Above 700 mm | 15~30 HP or above | 11~22 kW |
During grinding, both the workpiece material and the grinding wheel specification will affect the final grinding quality.
Recommended grinding wheel specifications for different materials are shown below:
For metal grinding:
| Workpiece Material | Hardness | Recommended Wheel Spec | Description |
|---|---|---|---|
| High Carbon Steel | Above HRC 50 | DRA60~80 | DRA (Deep Red Aluminum Oxide Wheel) is suitable for high-hardness materials. Grit 60~80 provides a balance between efficiency and surface finish. |
| Alloy Steel | Above HRC 50 | RA60~80 | RA (Red Aluminum Oxide Wheel) is suitable for hardened alloy steel and provides stable grinding performance. |
| Alloy Steel / Medium Carbon Steel (Heat Treated) | Above HRC 50 | WA60~80 | WA (White Aluminum Oxide Wheel) is ideal for heat-treated steel and ensures high surface precision. |
For rubber grinding:
| Workpiece Material | Hardness | Recommended Wheel Spec | Description |
|---|---|---|---|
| General Rubber | Around 60 Shore | C46~60 | C (Silicon Carbide Wheel) is suitable for soft materials. Grit 46~60 helps prevent excessive wear. |
| General Rubber | Around 60 Shore | GC46~60 | GC (Green Silicon Carbide Wheel) is suitable for harder rubber and provides better grinding performance. |
| Silicone | Above 60 Shore | DRA60 | DRA (Deep Red Aluminum Oxide Wheel) is suitable for high-hardness non-metal materials and ensures a fine surface finish. |