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High-purity white corundum abrasive wheels for precision grinding, grooving, deburring, and polishing on stainless steel, high-speed steel, quenched steel, and cold castings. Available in 8 shapes and 4 bond types for every application and machine.
White corundum is a high-purity form of aluminum oxide (Al₂O₃) produced by fusing calcined alumina. Its sharp, friable grain structure and low iron content make it the preferred abrasive for heat-sensitive, hard, and precision materials where cool, clean cutting is critical.
White corundum's friable grain fractures under grinding pressure, continuously exposing fresh sharp edges. This prevents heat buildup — critical for stainless steel and quenched steel where thermal damage causes discoloration or loss of hardness.
Minimum 99%+ Al₂O₃ content ensures consistent grain hardness, shape, and performance across production batches — delivering repeatable surface finish results in precision grinding and tool manufacturing applications.
Highly effective on stainless steel, high-speed steel (HSS), 45# steel, quenched and tempered steel, and cold castings — materials where standard brown corundum or silicon carbide wheels may cause micro-cracking or glazing.
White corundum grinding wheels are manufactured in standardized shapes aligned with ISO and ANSI grinding wheel form designations. Match the wheel shape to your machine spindle, workpiece geometry, and grinding operation type.
Cylindrical OD grinding, surface grinding
Thread grinding, form grinding
End-face grinding, vertical surface grinding
Tool & cutter grinding, face grinding
Gear grinding, saw sharpening
Carbide & HSS tool grinding
Convex surface grinding, radii finishing
Thread form grinding, internal grinding
The bond is the material holding abrasive grains in the wheel matrix. Bond type determines wheel strength, porosity, and performance at different speeds and workpiece materials.
The most widely used bond type. High porosity promotes chip clearance and cool grinding. Thermally stable and rigid — ideal for precision surface, cylindrical, and tool grinding. Maintains form well across long production runs.
High-speed and shock-resistant. Resin bonds flex slightly under load, providing a cushioned cut that reduces vibration and chatter — preferred for high-speed cutting-off, centerless, and rough grinding operations.
The most elastic bond type. Delivers an exceptionally fine, smooth surface finish with minimal vibration. Used for precision finish grinding, ball bearing race grinding, and applications requiring the lowest achievable surface roughness.
White corundum's sharp, friable grain and cool cutting behavior make it the preferred choice for hard ferrous metals and heat-sensitive workpieces.
All grades — 304, 316, duplex. Cool cut minimizes heat-affected zones and discoloration.
M2, M35, T1 and equivalent grades. Drill bit, tap, and cutting tool grinding.
Medium carbon structural steel. Deburring, surface preparation, and finish grinding.
Hardened tool steel, die steel. Sharp, friable grain prevents micro-cracking in hardened surfaces.
Grey iron, ductile iron castings. Parting line removal, gate grinding, and surface dressing.
Chrome-moly, nickel alloy steels. Precision profile and surface grinding.
Two variables — hardness grade and grit size — have the greatest effect on grinding performance. Use the guide below to match both to your workpiece and finish requirement.
Correct preparation before first use and regular dressing during service are essential for safe operation and consistent grinding performance.
Run the wheel at its maximum rated operating speed for at least 1 minute before applying workpiece contact. This confirms the wheel can safely sustain its highest speed without structural failure.
Mount the wheel on a balancing arbor and check for imbalance before installation. An unbalanced wheel creates machine vibration that degrades surface finish, accelerates bearing wear, and creates safety hazards at high RPM.
When to dress: When the wheel shows glazing (shiny, smooth surface), loading (workpiece material embedded in pores), loss of cutting action, or change in geometric form.
Dressing stick: Silicon carbide or aluminum oxide stick used for light dressing and opening the wheel face to restore sharpness on softer bond wheels.
Diamond wheel: Preferred for restoring precise geometric form and for truing ceramic-bond wheels used in precision grinding. Delivers the most consistent dressed profile.
Goal: Re-expose fresh, sharp abrasive grain and restore the correct wheel geometry — recovering full cutting efficiency and surface finish quality.
| Parameter | Options / Details |
|---|---|
| Abrasive Material | White Corundum (White Aluminum Oxide, WA / 白刚玉) |
| Available Shapes | Flat · Beveled · Cylindrical · Cup · Dish · Bowl · Concave · Tapered |
| Bond Types | Ceramic (Vitrified) · Resin · Rubber · Metal |
| Grit Range | Coarse (material removal) → Fine (precision finish) |
| Hardness Range | Soft → Hard grades (matched to workpiece hardness) |
| Compatible Materials | Stainless Steel · HSS · 45# Steel · Quenched Steel · Cold Castings · Alloy Steels |
| Applications | Grinding · Grooving · Deburring · Polishing · Tool & Cutter Grinding |
| Pre-Use Tests Required | Rotation Test · Static Balance Test |
| Dressing Method | Dressing stick · Diamond grinding wheel |
| Custom Specifications | Available on request — size, grit, bond, shape |
White corundum wheels are suitable for stainless steel, high-speed steel (HSS), 45# carbon steel, quenched and tempered steel, and cold castings. Their sharp, friable grain delivers cool cutting action that prevents thermal damage on heat-sensitive materials.
Eight shapes are available: flat (Type 1), beveled (Type 4), cylindrical, cup (Type 6/11), dish (Type 12), bowl, concave, and tapered. Cup wheels are especially popular for tool and cutter grinding and face grinding operations.
Ceramic (vitrified) bond is the standard choice for precision surface, cylindrical, and tool grinding — offering high porosity, thermal stability, and excellent form retention. Rubber bond is selected when the finest possible surface finish and lowest vibration are required.
Use coarse grit for rough grinding and high material removal rates where surface roughness is less critical. Use fine grit for precision grinding and close-tolerance finishes. The practical rule: always use the coarsest grit that still meets your surface finish specification to maximize grinding efficiency.
Two tests are mandatory before first use: a Rotation Test (running the wheel at maximum operating speed for ≥1 minute with no workpiece contact) and a Static Balance Test (checking for imbalance on a balancing arbor before machine installation).
Dress the wheel when you notice glazing (shiny surface), loading (embedded workpiece material), reduced cutting action, or loss of geometric form. Use a dressing stick for light surface opening or a diamond grinding wheel for precision form restoration and truing of ceramic-bond wheels.
Tell us your workpiece material, machine type, and finish requirement — we'll recommend the optimal shape, bond, grit, and hardness grade.
