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Sanding

Sanding. Coated Abrasives. Coated abrasives , commonly known as “sandpaper” are available in a variety of grit sizes and backing materials. Thin and flexible-150 to 600 grit Heavier than A-100 to 150 grit Heavy-Usually less than 100 grit Heaviest- used for sanding disks.

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Sanding

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  1. Sanding

  2. Coated Abrasives • Coated abrasives, commonly known as • “sandpaper” are available in a variety of grit • sizes and backing materials. • Thin and flexible-150 to 600 grit • Heavier than A-100 to 150 grit • Heavy-Usually less than 100 grit • Heaviest- used for sanding disks

  3. Abrasive Materials, or grit, can be • either natural or synthetic. The most • common materials are: Flint: made from quartz Aluminum Oxide: made from aluminum ore Garnet:a natural red silicate material Silicon Carbide: made from silica, petroleum coke, salt, and wood sawdust Emery: a natural material best for metal sanding

  4. Abrasive Grit Sizes: Standard grit sizes • for most materials are indicated by a number Class Mesh size Symbol Very fine 400 10/0 360 ----- 320 9/0 280 8/0 240 7/0 220 6/0 180 5/0 Continued…..

  5. Class Mesh Symbol Fine 150 4/0 120 3/0 100 2/0 Medium 80 1/0 60 ½ 50 1 Course 40 1 ½ 36 2 Very Course 30 2 ½ 24 3 20 3 1/2

  6. Hand Sanding 1. All exposed surfaces of the stock are sanded • Repair any dents or major scratches before • sanding • Grades 80, 120 and 220 abrasive materials • can be used for most sanding jobs • Always start with the coarser grade, • followed with finer grades

  7. Power Sanding Equipment • Disk Sander: Useful when shaping • edges and ends of stock 2. Belt Sanders: -Production Wide Belt Sander -Stationary Belt Sander -Portable Belt Sander

  8. Finish Sanders: used for the last steps in • the sanding process. • -they are designed to use regular sheets of • sandpaper in either ¼, 1/3, or ½ sections. • Other Sanders • Drum sanders use abrasive sleeves • that fit onto a rubber cylinder. Used to • sand curved edges of stock.

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