Chuck Extension Adaptor; Depth Setting Rod; Head Movement - Powermatic 720HD Operating Instructions And Parts Manual

Heavy-duty mortiser
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Chuck Extension Adaptor

The provided Chuck Extension Adaptor is used
to lower the chuck for use with after-market
chisels (chisels other than those supplied with
your machine) that may require a spacer due to
varying lengths in shanks.
1. To install the adaptor, first remove the chisel
and auger.
2. It may be necessary to remove the bushing
to provide enough clearance when installing
the chuck and adaptor. If so, loosen the set
screw and remove the bushing.
3. Hold the spindle stationary by placing a
wrench on the flats of the spindle (see
Figure 9). With your other hand, insert the
chuck key into the chuck and use it to twist
the entire chuck, until the chuck releases
from the tapered spindle. Do not allow the
chuck to drop, as it can be damaged.
4. Push the adaptor into the chuck (Figure 9).
Then push this assembly onto the spindle.
5. Re-install the bushing and secure it loosely
with the set screw.
6. Re-install
the
chisel
"Installing Bushing, Chisel and Auger".

Depth Setting Rod

The depth setting rod (Figure 10) limits the
depth of the stroke.
1. Lower the mortising head until the chisel is
at the desired depth.
2. Loosen the locking handle and slide the
depth rod down until the collar contacts the
block.
3. Tighten the locking handle.

Head Movement

The
three
handles
(explained below) are spring loaded, and can be
adjusted
to
different
convenience of the operator. Pull up on the
handle close to its hub and rotate it, allowing it
to drop back down onto the pin. See Figure 11.
Make sure the handle re-seats itself properly on
the pin.
and
auger.
See
for
head
movement
positions
for
the
Figure 9
Figure 10
Figure 11
12

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