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15
Beveling
To cut a bevel, lock the fence at the required angle
and run the work across the knives while keeping it
firmly against the fence and tables. Several
passes may be necessary to achieve the desired
result.
Taper Cuts
One of the most useful jointer operations is cutting
an edge to a taper. The method can be used on a
wide variety of work. Tapered legs of furniture are
a common example.
Instead of laying the piece on the infeed table,
lower the forward end of the work onto the outfeed
table.
Do this very carefully, as the piece will span the
knives, and they will take a "bite" from the work
with a tendency to kick back unless the piece is
firmly held. Now push the work forward as in
ordinary jointing.
The effect is to plane off all the stock in front of the
knives to increase depth, leaving a tapered
surface.The ridge left by the knives when starting
the taper may be removed by taking a very light cut
according to the regular method for jointing, with
the infeed table raised to its usual position.
Practice is required in taper operations, and the
beginner is advised to make trial cuts on waste
material. Taper cuts over part of the length and a
number of other special operations can easily be
done as the operator gains experience.
Maintenance
Disconnect machine from
power source before performing maintenance.
Check all screws and fasteners occasionally and
keep them tightened securely.
The table and fence surfaces must be kept clean
and free of rust for best results. Some users prefer
a paste wax coating. Aerosol protectants are also
available at hardware and tool stores.
Lubrication
Use a high grade light grease on the steel
adjusting screws for the raising and lowering
mechanisms of the infeed and outfeed work tables.
The cutterhead runs in two single-row sealed and
shielded ball bearings, which are pre-lubricated for
life - no maintenance is necessary.
Cutterhead Repairs
The entire cutterhead assembly may be removed
for bearing replacement or other cutterhead
maintenance procedures.
To remove the cutterhead:
1. Disconnect machine from power source.
2. Lower infeed and outfeed tables.
3. Remove rabbeting ledge and fence.
4. Remove belts.
5. Loosen the two bolts that hold the cutterhead
to the bed – these are accessed from the
underside of the bearing blocks as shown in
Figure 26.
Before removing cutterhead,
wrap it with cloths to prevent personal injury.
Figure 26
6. Slide the cutterhead out the rabbeting side.
7. Loosen lock screw (A, Figure 27) and remove
pulley (B, Figure 27) and key (C, Figure 27).
8. Take down screws (D, Figure 27) on both
sides and remove bearing cap plates (E,
Figure 27).
Figure 27
IMPORTANT: If the bearings (G, Figure 27) need
replacement, Powermatic strongly recommends
this be done by qualified service personnel. The
bearings are press fitted and must be removed with
an arbor press.