Uploaded November 2025 | Updated September 2026, 37 minutes ago

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Have you ever wondered what the 3 or 5 on a random orbit sander means The name of this tool gives us a good clue about the meaning of the numbers. Random orbit sander. The pad moves in an orbit. 3 and 5 tell you how big the orbit is: 3 mm or 5 mm. The numbers indicate the distance from extreme left to extreme right, or extreme top to bottom.

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