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 and C to disengage completely and
to provide for easier reassembly, unscrew the nut secu-
ring 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 numer of teeth on each gear is clearly marked.
Replace the securing screws, ensuring the flat washer
gears up against the gear hub in each case.
NOTE: If a compound gear train is required, as shown in
Fig. B ensure the spacer, which is keyed to the shaft carry-
ing 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 and C 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 poss-
sible without being over-tight. (Turn the spindle by hand
to test for backlash.)
Replace the cover and secure with the two hex socket
head bolts.
MAINTENANCE
For maximum performance, it is essential that the lathe be
properly maintained.
BEFORE USE
Always inspect before use. Any damage should be repaired
and misadjustments rectified. Damage to machined surfaces
should be repaired with an oil stone. Test by hand to ensure
smooth operation of all parts before use.
Apply a few drops of oil to the oil ways at both lead screw
bearings (at each end bracket) and add more once or twice
during the day if used continuously. It will be necessary to
remove the gear train cover in order to oil the left hand bea-
ring.
Aplly a few drops also to the compound slide oil way, loca-
ted on the slides’ top surface, between the two socket head
screws.
AFTER USE
Remove all chips and debris from the machine and tho-
roughly clean all surfaces. If coolant had been used, ensure
it has completely drained from the tray. Components should
be dry, and all machined surfaces should be lightly oiled.
Always remove cutting tools, and store them in safe place.
MOTOR BRUSHES
The Motor brushes may be changed by unscrewing the caps,
visible at the front and rear of the machine beneath the
Headstock, as shown in Fig. 11.
SETTINGS AND ASJUSTMENTS
Occasionally, it may be necessary to readjust various com-
ponents in order to maintain optimum performance. The
adjustments that may be performed follows:
A. CROSS-SLIDE ADJUSTMENTS
The cross-slide is mounted on a dovetail slide, as shown in
fig. 12. Between the sloping surfaces on one side of the
dovetail, a “jib strip” is inserted, which may be tightened
against the dovetail under the influence of three adjuster, of
“jib” screws, mounted along its’ length.
Gib or
Adjuster
Screw
Gib Strip
The jib screws are to be found on the right hand side of the
slide, directly beneath the compound slide handle. In time,
wear will occur on the mating surfaces resulting in a “slop-
piness” of action.
To adjust the jib strip, to account for wear and ensure the
slide moves evenly and smoothhly, proceed as fol-lows:
1. Loosen off all lock nuts and screw in the jib screws even-
ly, i.e., use the same torque for each screw. The slide
should be held firmly. Test by trying to turn the handle,
but do not force it.
2. Screw out each jib screw by one quarter of a turn ONLY,
and nip up the lock nuts.
3. Test again, by turning the handle. The movement should
be even and smooth along its complete length.
4. If the movement is too losse screw all adjusters “in” by
one eighth of a turn, and re-try. Similarly, if the move-
