Transcript Sanding methods PowerPoint

1. Coated abrasives, commonly known as
“sandpaper” are available in a variety of grit
sizes and backing materials.
A.
B.
C.
D.
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
2. 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
3. Abrasive Grit Sizes: Standard grit sizes
for most materials are indicated by a number
Class
Very fine
Mesh size
400
360
320
280
240
220
180
Continued…..
Symbol
10/0
----9/0
8/0
7/0
6/0
5/0
Class
Mesh
Symbol
Fine
150
120
100
80
60
50
40
36
30
24
20
4/0
3/0
2/0
1/0
½
1
1½
2
2½
3
3 1/2
Medium
Course
Very Course
1. All exposed surfaces of the stock are sanded
2. Repair any dents or major scratches before
sanding
3. Grades 80, 120 and 220 abrasive materials
can be used for most sanding jobs
4. Always start with the coarser grade,
followed with finer grades
1. Disk Sander: Useful when shaping
edges and ends of stock
2. Belt Sanders:
-Production Wide Belt Sander
-Stationary Belt Sander
-Portable Belt Sander
3. 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.
4. Other Sanders
1. Drum sanders use abrasive sleeves
that fit onto a rubber cylinder. Used to
sand curved edges of stock.