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daniel84Sep 9, 2025
What causes a knocking sound while running Jet Sander?
- JJeremy BurnsSep 9, 2025
A knocking sound while the sander is running can be caused by several issues: bearings out of alignment (re-align bearings), a worn V-belt (replace V-belt), dust in the drum (remove material inside drum), a pulley wobbling or out of round (replace pulley), set-screws loose in the pulley or bearing (re-tighten set-screws), an abrasive fastener on the drum loose (insert abrasive strip, or replace fastener), or worn drum bearings (replace drum bearings).










