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Red abrasive flap disc with a reinforced backing plate.
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Request a quoteThe red abrasive cloth flaps on this WanHu disc overlap around a reinforced backing plate. This construction supports consistent contact as the abrasive wears during grinding and finishing.
Use for deburring, weld seam cleanup and surface blending on compatible metal parts. Match the grit, wheel size, bore and rated speed to the grinder and workpiece.
| Brand | WanHu |
|---|---|
| Product family | Flap disc |
| Color shown | Red |
| Construction | Layered abrasive cloth flaps |
| Uses | Use for deburring, weld seam cleanup and surface blending on compatible metal parts. Match the grit, wheel size, bore and rated speed to the grinder and workpiece. |
| PPT source page | 10 |
A bigger wheel must run slower. The limit is set by peripheral speed (how fast the rim travels), not by a fixed RPM number — so the safe RPM drops as the diameter grows.
| Wheel diameter | Spec code | Max. safe speed | Peripheral speed at that limit |
|---|---|---|---|
| Ø 100 mm4" | 4 × 50 | ≤ 6,000 RPMMaker rating on small wheels — the arbor and guard set the real ceiling | 31.4 m/s |
| Ø 150 mm6" | 6 × 50 | ≤ 3,000 RPMMost common size — many makers rate it at 2,800 RPM | 23.6 m/s |
| Ø 200 mm8" | 8 × 50 | ≤ 2,200 RPM | 23.0 m/s |
| Ø 250 mm10" | 10 × 50 | ≤ 1,800 RPM | 23.6 m/s |
| Ø 300 mm12" | 12 × 50 | ≤ 1,400 RPM | 22.0 m/s |
Spec code format: diameter (inch) × ply count — 4 × 50, 5 × 50, 6 × 50, 7 × 50, 8 × 50, where 50 ply means 50 cotton layers. Finished thickness is 12 mm across the whole range.
Peripheral speed = π × diameter (m) × RPM ÷ 60
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