General Sanding
Sweep sander faster on curved surfaces where contact area is
smaller and pressure is greater.
Reduce pressure at the ends of the side to side strokes to avoid
excessive sanding at end areas.
Use a stiffer backing pad when sanding over low spots. A soft
backing pad will force the disc into the low spots making them
even lower.
Finish Sanding
When finish sanding an area that has been coarse sanded,
sweep the tool perpendicular to the coarse sanding sweeping
marks.
Avoid excessive heat build up
Keep the sander moving across the workpiece so that heat
build up is kept to a minimum. Excessive heat build up can
cause premature wearing of the sanding disc, warpage of thin
metal, and possible loss of temper on heat-treated metal.
Deep scratches may occur from:
• using too coarse a grit
• using a glazed disc
• having dirt or loose metal on the workpiece
• failing to finish sand perpendicular to the direction
of the coarse sanding. See “Finish Sanding”, above.
• failing to use closed-coated discs. Using
closed-coated discs reduces the problem of loose
sanding grains on the work surface.
Bluish discoloration of the metal surface indicates exces-
sive heat which results from:
• not enough movement of sanding disc across work
piece
• circular motion in a small area
• excessive pressure
• use of worn or glazed discs
Grinding
1. Pull trigger and allow the tool to reach full speed.
2. If you have just installed a grinding wheel or are just
beginning a period of work, test wheel by letting it spin for one
minute before applying it to the workpiece.
Note: Out-of-balance wheels can mar workpiece, damage the
tool, and cause stress to wheel that may cause wheel failure.
2. Gently apply wheel to workpiece.
Avoid excessive heat build up
Keep the grinder moving across the workpiece so that heat
build up is kept to a minimum. Excessive heat buildup can
cause premature wearing of the grinding wheel, warpage of
thin metal, and possible loss of temper on heat-treated metal.
Wire Brushing
1. Pull trigger and allow the tool to reach full speed.
2. If you have just installed a wire brush or are just beginning
a period of work, test the brush by letting it spin for one minute
before applying it to the workplace.
3. Gently apply wire brush to workpiece.
Operating Instructions (continued)
Page 5
RenTrain INC
RenTrain INC
To reduce the risk of injury:
• ALWAYS use the proper guard.
• ALWAYS properly install the guard.
• ALWAYS place the tool on the tool rest when not in
use.
• ALWAYS hold the tool firmly with both hands before
beginning grinding.
• NEVER use a wheel that has been dropped. NEVER
• bang grinding disc onto work.
• NEVER grind without proper safety equipment.
WARNING!
To reduce the risk of injury, ALWAYS wear safety goggles
and protective clothing when using cup brushes. NEVER
use a guard with cup brushes.
WARNING!