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Published byWillis Davis Modified over 9 years ago
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Abrasives
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Early kinds of abrasive Sand paper was first mass-produced in 1833.
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Early kinds of abrasive Early sand paper used tiny glass shards bonded to paper.
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Today’s common types of sand paper Garnet: common for wood working. Aluminum oxide: for wood or metal. Silicon carbide: wet or dry applications Garnet Aluminum oxide Silicon Carbide
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Grit size The number on the back of the sand paper refers to the number of grains that fit in a square inch. CoarseSmooth 80 100 120 150 180 220 320
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The larger the number the smaller the grit size. The smaller the number the larger the grit size.
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Use coarse paper for rough sanding 80 to 100 grit For heavy sanding. To remove machine marks.
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Use medium grit for final sanding of wood. 120, 150, 180 grit Breaking edges Removal of scratches
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Use Fine grit for sanding between coats of finish. 220, 320 grit Sand lightly between coats of finish. Remove any rough areas of finish.
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Types of sanders Portable belt sander. –For aggressive or rough sanding
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Types of sanders Orbital sanders, ½ and ¼ sheet –For medium to fine sanding
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Types of sanders Random orbit, Pneumatic and electric. –For swirl free sanding of wood.
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Types of sanders Stationary Wide belt sander –For sanding machine marks out of surface of wood.
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Types of sanders Stationary Edge belt sander –For straight edges of boards and radiuses. Use caution, this machine can remove material quickly
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Types of sanders Stationary Disc Sander –For outside curves and short straight edges.
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Types of sanders Stationary Oscillating spindle sander –For inside curves or radiuses.
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