6
MN914
Several methods for belt grinding can be used:
see Figure 1.
1.
Platen Grinding
(Horizontal or Vertical)
a.
Be sure the platen is properly adjusted, see Maintenance section of this manual.
b.
Work of any length can be surfaced using the platen. For example the sawn edges
of wood from short pieces up to lengths of several meters.
2.
Disc Grinding
When possible, remove belt (to reduce wear) when disc grinding.
Use only grinding area indicated in Figure 3.
a.
Tool and cutter sharpening is a simple task and there is less chance of burning the
work edges. When using the optional table, lengths and angles are easy to adjust.
Dressing end grain flat and square has always been a difficult task but now it is a
simple and quick operation, making perfect joints possible. A rubber cleaning stick
should be used regularly to prevent built up of wood resin.
b.
Three options are available in abrasive discs. 1. Self-Adhesive. 2. Fur backed -
which must be used with an optional hook and loop backing pad. 3. Plain paper or
cloth backed disc which must be attached with a contact adhesive. When changing
a disc pad, remove all remaining adhesive from the disc with solvent (acetone or
lacquer thinner). Do not use household cleaners.
Figure 3 Disc Grinding
Disc Grinding Area
Use only the surface indicated so grinding is in the
downward direction and the force against the work
piece is downward against the table.
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.
