Clarke Metalworker CDP501F, Operating & Maintenance Manual

Page: 12 / 23

12
Before changing the speeds, ensure the machine is switched OFF, and disconnected from
the mains supply.
To set a drilling depth:
1. Lower the drill (with the power OFF) so that it contacts
the work, and hold in that position.
2. Slacken off the locking screw, and turn the collar so that
the measurement for the depth of hole required is in line
with the pointer (C). Lock the collar in this position using
the locking screw.
The drill is now set to drill holes to your pre-determined depth,
from that particular start point. i.e. Providing the surface of
your workpiece is flat and level, you may drill a series of holes,
each to the same depth.
3. Changing Drill (Spindle) Speed.
Spin the nut C - fig. 10, so that it is towards the end of the
thread on the peg. Lighly oil the smooth tapered end of the
peg before inserting it into the hole in the mounting, and into
the corresponding hole in the table support. It may be
necessary to turn the table slightly in order to line up the
holes. Tap the peg home gently, using a soft headed mallet
or copper hammer. Finally screw the nut in, but only until it
comes into contact with the housing.
2. Spindle Depth.
(Ref. Fig. 12)
Fig. 12
Fig. 11
Table Tilt Scale
Located around the spindle feed shaft is a Depth Stop Collar, carrying a graduated scale
(A). The collar is capable of turning about the shaft, and may be locked in place by a
Locking Screw (B). Graduations are imperial (inches) and metric (mm).
1 Undo the Belt Tension Lock Knobs (A-
fig.13), one either side of the head and
turn lever B clockwise to relieve any
tension on the belts. Referring to the chart
inside the belt cover (which is duplicated
on page 14), fit the belts in the positions
corresponding to the spindle speed
required.
2. Lever the motor, on its bracket, away
from the head, by turning lever B - fig.13,
anti-clockwise so that tension is applied
to the belts.
NOTE: The idler pulley will ‘float’ so that tension is equally applied to both belts
Tension is correct, when the belts deflect by approx. ½” at their centre when using
reasonable pressure with the thumb and forefinger.
Lock the motor in this position tightening the two lock knobs - A.
NOTE: If the belt should slip whilst drilling, adjust the belt tension.
Fig. 13