Clarke MetalWorker CL300M, Operating & Maintenance Instructions

22

In order to change the gears, ensure the machine is switched OFF and disconnected
from the mains supply.

Remove the gear train cover which is secured with two hex. socket head screws.

Gear A may be considered as the Driver, and Gear D as the Driven gear.

When a Simple gear train is configured, as illustrated in Fig. A, page 19, the gear at
B acts as an Idler and its size is therefore irrelevant - any convenient gear will suffice
to connect A and D. This is denoted by a blank space in the column in the gear
chart.

The positions of the shafts carrying gears A and D are fixed, therefore all adjustments
are carried out on the shaft carrying gears B and C and the Adjuster ‘A’, shown in
fig. 11.

1.

Unscrew the hex socket head screws,
securing gears A and D, followed by
the screw securing gears B and C.

2.

To allow the gears B andC to
disengage completely and to
provide for easier reassembly,
unscrew the nut securing the shaft
carrying B and C, and the nut
securing the adjuster A.

3.

Remove the gears, taking care to

retain the small keys on each shaft,

and replace with those necessary to
produce your screw thread. They may
be mounted either way round.
The number of teeth on each gear is
clearly marked.

Replace the securing screws,
ensuring the flat washer bears up
against the gear hub in each case.

NOTE: If a compound gear train is required, as
shown in Fig. B on page 18, ensure the spacer,
which is keyed to the shaft carrying gear D, is
located on the shaft, BEFORE the gear, in order
to align gear D with gear C.

4.

Proceed to move the shaft carrying B andC and the adjuster ‘A’ so that all
gears mesh correctly, then tighten the adjuster securing nuts.  This may take
one or two attempts but make sure there is as little backlash as possible without
being overtight. (Turn the spindle by hand to test for backlash).

Replace the cover and secure with the two hex socket head bolts.

CAUTION:

NEVER run the machine with the cover removed.

Fig 11