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2. Flapwheel - Wikipedia

   en.wikipedia.org/wiki/Flapwheel

   Early radial flapwheel, for use with an electric drill. A flapwheel and the related flap disk is an abrasive disk, used for metal finishing. Unlike the simpler flat disks, made from a circular flat sheet of a coated abrasive, a flapwheel is made of multiple overlapping small pieces or 'flaps', bonded to a central hub.

3. Grinding wheel - Wikipedia

   en.wikipedia.org/wiki/Grinding_wheel

   The wheel type (e.g. cup or plain wheel below) fit freely on their supporting arbors, the necessary clamping force to transfer the rotary motion being applied to the wheels side by identically sized flanges (metal discs). The paper blotter shown in the images is intended to distribute this clamping force evenly across the wheels surface.

4. Sander - Wikipedia

   en.wikipedia.org/wiki/Sander

   The usually wooden work piece, (although other materials can be shaped and worked on such as plastics, metals and other soft materials), is sat on a front bench that can be adjusted to various angles. It can be used for rough or fine sanding depending on the sanding grit used. Drum sander: A large sander that uses a rotating sanding drum.

5. Lapping - Wikipedia

   en.wikipedia.org/wiki/Lapping

   A piece of lead may be used as the lap, charged with emery, and used to cut a piece of hardened steel. The small plate shown in the first picture is a hand lapping plate. That particular plate is made of cast iron. In use, a slurry of emery powder would be spread on the plate and the workpiece simply rubbed against the plate, usually in a ...

6. Abrasive - Wikipedia

   en.wikipedia.org/wiki/Abrasive

   A bonded abrasive grind wheel may be used to commercially sharpen a knife (producing a hollow grind), but an individual may then sharpen the same knife with a natural sharpening stone or an even flexible coated abrasive (like a sandpaper) stuck to a soft, non-slip surface to make achieving a convex grind easier. Similarly, a brass mirror may be ...

7. Grinding (abrasive cutting) - Wikipedia

   en.wikipedia.org/wiki/Grinding_(abrasive_cutting)

   A cylindrical grinder has a grinding (abrasive) wheel, two centers that hold the workpiece, and a chuck, grinding dog, or other mechanism to drive the work. Most cylindrical grinding machines include a swivel to allow the forming of tapered pieces. The wheel and workpiece move parallel to one another in both the radial and longitudinal directions.