Sanding

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 Garneta 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.