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.

Coarse Smooth

80 100 120 150 180 220 320

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 sandersStationary

• Edge belt sander – For straight edges of boards and outside

radiuses.– Use caution, this machine can remove

material quickly

Types of sandersStationary

• Disc Sander– For outside curves and short straight edges.

Types of sandersStationary

• 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