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Blue flap disc built around a black reinforced backing plate.
Ask about sample supply, volume orders and custom specifications.
Request a quoteThis WanHu flap disc uses blue abrasive cloth flaps and a black reinforced backing plate. Its layered construction makes it a practical consumable for industrial grinding and finishing operations.
Use for weld treatment, burr removal and surface preparation on compatible metal workpieces. Confirm the abrasive specification and maximum operating speed before use.
| Brand | WanHu |
|---|---|
| Product family | Flap disc |
| Color shown | Blue |
| Backing shown | Black reinforced plate |
| Uses | Use for weld treatment, burr removal and surface preparation on compatible metal workpieces. Confirm the abrasive specification and maximum operating speed before use. |
| PPT source page | 11 |
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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