Operation – RIDGID R2740 User Manual
Page 10
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WARNING:
Do not allow familiarity with products to make you
careless. Remember that a careless fraction of a
second is sufficient to inflict serious injury.
WARNING:
Always wear safety goggles or safety glasses with
side shields when operating power tools. Failure
to do so could result in objects being thrown into
your eyes resulting in possible serious injury.
WARNING:
Do not use any attachments or accessories
not recommended by the manufacturer of this
product. The use of attachments or accessories
not recommended can result in serious personal
injury.
WARNING:
Before connecting the sander to a power supply,
make sure it is not in the locked-on position. Failure
to do so could result in accidental starting of the
tool resulting in serious injury.
APPLICATIONS
You may use this product for the purposes listed below:
Sanding wood, metals, and plastics
Smoothing rough boards, chamfering, rounding edges
Removing rust, paint, varnishes, and stains
WARNING:
If your sanding job becomes dusty or if you have a
breathing condition, wear a dust mask or respirator
to prevent damage to your health.
SELECTING SANDING BELTS
Selecting the correct size and type of sanding belt is an
important step in achieving a high quality sanded finish. Alu-
minum oxide, silicon carbide, and other synthetic abrasives
are best for power sanding.
In general, when sanding, coarse grit removes the most ma-
terial and fine grit produces the best finish. The condition of
the surface to be sanded determines which grit will do the
best job. If the surface is rough, start with a coarse grit and
sand until the surface is uniform. Then use medium grit to
remove scratches left by the coarser grit. Finally, use finer
grit for finishing the surface. Always continue sanding with
each grit until the surface is uniform.
SETTING THE BELT SANDER SPEED
Refer to the chart below for belt sander speed selections.
OPERATION
MATERIAL
SPEED
BELT GRIT
A
B
C
D
E
F
40
60
80
100
150
240
UNDRESSED
LUMBER
SOFTWOOD
CHIPBOARD
LUMBER
RUST REMOVAL
PAINTED SURFACE
NON-FERROUS
METAL