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3.
Contact Wheel Grinding Polishing and Sanding
a.
Using the front contact wheel avails the user of material removal many times faster than a conventional
grinding wheel. The unique smooth cutting action is cooler, faster and safer than conventional grinding
methods. A good example of one of the many uses is the smoothing of welds and casting blemishes prior
to plating.
b.
Using the extremely fast and easy belt change it is possible to go from a rough weld finish to a flat, smooth
polish suitable to chrome plate in only two belt changes, e.g. Remove rough weld with 40; 60 or 80 grit belt.
Remove grinding marks with 240 grit belt.
Change ground finish to smooth, brushed finish for plating - Scotch brite super fine.
c.
Wood shaping and finishing can be done in a similar manner but belts should always be kept exclusively
for wood especially in the finer grades.
A rubber belt cleaning stick helps prevent clogging on wood use.
4.
Free Strapping
a.
Free strapping is a method of belt grinding, sanding or polishing where no backing is used behind the
belt. It is especially suitable for round and contoured work and some sharpening operations. It is done on
the underneath side of the belt opposite the platen.
b.
It is ideally suited to narrow belt widths as small as 1/2" (13mm). Belt grades of 180 to 400 are
recommended because of the rapid cutting action of narrow belts.
Maintenance
WARNING:
Prevent electrical shock hazard and accidental machine operation. Always disconnect grinder-buffer from
the power source before servicing, changing accessories (such as wheels, tool rest, spark arrestor, etc.) or
before performing maintenance.
Replace worn wire brush wheel as necessary. The wheel should be replaced after the diameter is reduced by 1 or 2
inches from original size. When replacing a worn wheel, remove all dust and other materials from wheel guard.
Motor and pulley bearings are lubricated for life and do not require additional lubrication.
Replacement wheels may be purchased directly from your local industrial supply dealers, abrasive dealers, tool
dealers, etc.
Remove grinding dust from exhaust ports to prevent accumulation.
Replace damaged parts immediately to maintain safety of machine.
Top Plate
Platen
Idler Pulley
Top Bolt
Catch
Idler
Tracking Adjustment see Figure 4
Always ensure belt entirely covers rubber Drive Pulley. Adjustment is made when running or when belt rotated by
hand. To adjust left, move tracking lever down. To adjust right, move lever up. If tracking lever is set fully in up or
down position, coarse tracking adjustment must be made.
Coarse Tracking
1.
Set Tracking Lever in the mid position so it is horizontal.
2.
If belt was changed, release the catch so spring loaded idler pulley is in full contact with belt. Manually rotate
belt a few times and observe the position of the belt.
3.
If belt wanders toward the disc, loosen Top Bolt slightly and tap Top Plate a small amount toward the grinder. If
belt wanders toward the grinder, loosen Top Bolt slightly and tap Top Plate a small amount toward the disc.
4.
When belt runs evenly on drive pulley and idler pulley, tighten the Top Bolt.
5.
Put on full face shield.
6.
Place the On-Off switch in the On position. Grinder-buffer should come up to speed smoothly and without
vibration. If grinder-buffer does not, shut grinder-buffer off immediately and determine reason.
7.
Verify the belt runs evenly on drive pulley and idler pulley.
8.
Place the On-Off switch in the Off position when done.
Fine Tracking The Tracking Lever is used for the final fine adjustment.
1.
Move Tracking Lever slightly Down to move belt left on the platen or Up to move belt right on the platen.
2.
Move Tracking Lever slightly Up or Down as needed to obtain 1/4" (6mm) clearance between Disc and Top
Plate.
MN914
Figure 4 Belt Adjustments
Tracking
Lever
Abrasive Disc
Drive Pulley
1/4" (6mm)
Top Plate
Top Bolt
Tracking Lever
5
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