22
To cut 12 TPI, Imperial Thread, use 60T at position A,
36T at position B
50T at position C
27T at position D
In order to change the gears, ensure the machine is switched OFF and disconnected
from the mains supply.
Re: Fig. 21
Open the door to the gear train.
1. Unscrew the hex socket head screw - 6,
allowing the gear train to drop so that
gear B becomes disengaged from
gear A - as shown.
2. To change gear A, remove the
circlip - 1 and pull off the gear.
Replace ensuring the boss faces
towards you.
3. To change gears C and B, remove
the circlip -2 and pull off the gears.
Replace ensuring the bosses - 5
face towards you.
4. To change gear D, unscrew and
remove the securing nut and pull off
the flat washer 3, distance piece 4,
and the gear. Replace in reverse
order.
5. Re-engage gears A and B and
tighten the Hex socket head screw
- 6, ensuring a little backlash is
evident between the gears.
Fig.21
Note: Backlash should be as little as possible without being over tight. (Turn the
spindle by hand to test for backlash)
.
6. Replace the door
NOTE: The machine will not run with the cover removed.
NOTE: Fig. 21 shows a gear configuration for simple turning.
A - 30 B - 60 C - 27 D - 63
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