How to Select the Right Grinding Wheel
Abrasive type, grit size, grade, and structure — matched to your material and operation.
Step 1: Choose the Right Abrasive
Aluminum Oxide (White/Pink)
General purpose carbon steel, high-tensile steels. Most common grinding abrasive.
Ceramic Aluminum Oxide
Stainless steel, aerospace alloys, nickel-based. Self-sharpening, long life.
Silicon Carbide
Aluminum, brass, cast iron, non-ferrous metals. Sharp, fast cutting.
Diamond
Carbide, ceramics, glass, stone. Hardest abrasive.
CBN (Cubic Boron Nitride)
Hardened steels, nickel-based superalloys (Inconel, etc.). Thermal resistance.
Step 2: Choose Grit Size
| Grit | Size Range | Best For |
|---|---|---|
| 16 – 24 | Very Coarse | Rapid stock removal, rough grinding |
| 36 – 54 | Coarse | Medium stock removal, deburring |
| 60 – 80 | Medium | General surface grinding, tool sharpening |
| 120 – 150 | Fine | Finish grinding, close tolerance |
| 180 – 240 | Very Fine | Super finishing, Ra 0.4 – 0.8 µm |
| 320 – 600 | Extra Fine | Mirror finish, honing |
Step 3: Grade (Hardness)
Grade refers to how tightly the abrasive grains are bonded — not how hard the grain is. Hard grades (J, K, L) hold the grain longer — good for soft materials. Soft grades (D, E, F) release worn grains faster — better for hard materials that need continuous sharp grain exposure.
Step 4: Structure (Porosity)
More porous wheels (fine/medium structure) clear chips better and resist loading — good for soft, gummy materials. Dense structures provide better form retention for precision profile grinding.
Calculate Your Speed First
Wheel selection and wheel speed go hand in hand. Use our calculator to verify your parameters before purchasing wheels.
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