Transcript Abrasives

Abrasives
Today’s common types of sand
paper
• Garnet: common for wood working.
• Aluminum oxide: for metal.
• Silicon carbide: wet or dry applications
Garnet
Aluminum oxide
Silicon Carbide
What type of sand paper is made
for use on wood?
A. Silicon carbide
B. Garnet
C. Aluminum oxide
Grit size
Begin with coarse paper, and work
up to finer grits.
80
Coarse
100
120
150
180
220
320
Smooth
The larger the number the
smaller the grit size.
The smaller the number the
larger the grit size.
Which number represents the most
coarse grit.
A. 180
B. 80
C. 100
D. 120
Use coarse paper for rough
sanding
80 to 100 grit
• For heavy sanding.
• To remove machine marks.
Use medium grit for final sanding of
wood.
120, 150, or 180 grit
• Breaking edges
• Removal of scratches
Breaking
Edges
Use Fine grit for sanding between
coats of finish.
220, 320 grit
• Sand lightly between coats of finish.
• Remove any rough areas of finish.
Types of sanders
• Portable belt sander.
– For aggressive or rough sanding
Types of sanders
• Orbital sanders, ½ and ¼ sheet
– For medium to fine sanding
Types of sanders
• Random orbit, Pneumatic and electric.
– For swirl free sanding of wood .
Which sander is used for course
sanding?
A. Random orbit sander
B. Portable belt sander
C. Orbital sander
Types of sanders
Stationary
• Wide belt sander
– For sanding machine marks out of surface of
wood panels
Types of sanders
Stationary
• Edge belt sander
– For straight edges of boards and outside
radiuses.
– Use caution, this machine can remove
material quickly
Types of sanders
Stationary
• Disc Sander
– For outside curves and short straight edges.
Types of sanders
Stationary
• Oscillating spindle sander
– For inside curves or radiuses.
Which of these sanders can sand
inside radiuses?
A. Disk sander
B. Edge belt sander
C. Oscillating spindle sander
D. Wide belt sander