Flap Sander Fail

I tried out an idea I had for a flap sander where replaceable pieces of sandpaper are held in place with a pin. While the mechanism worked well, the sandpaper I used was not stiff enough. I'll see how it works at some point with thicker paper.

[@DavidRodriguez-ci6dm]

Thank you, You just helped me solved a huge step i'm facing in my shop. this is the fix.

[@mickael4973]

4 slots are not enough...

[@RoborobsComputers]

looked like it was spinning backwards. meaning the rough side of the paper was away from the wood.

[@1pcfred]

Maybe you were just not turning it fast enough? a 6" diameter bench grinder typically runs at 3450 RPM. Your effective diameter appears smaller than that. The surface speed power abrasives runs at is fairly high. Somewhere in the 6,000-9,000 feet a minute range. That earlier bench grinder example is 5,419 SFPM (Surface Feet per Minute)for instance. So say your effective diameter is maybe 4 inches? Now to achieve the same surface speed as a bench grinder you would have to turn at 5,174 RPM. Tell you what, when you turn your lathe up that high I'll be standing way over here.