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-34-
G9729 Combination Lathe/Mill
Lathe Speeds
Figure 34. Lathe speed chart.
Example:
To select a spindle speed of 160 RPM, refer to
Figure 34.
To
change belt position:
1. Unplug the lathe/mill!
2. Loosen
the tensioning lock lever on the back
of the lower belt guard (see Figure 35).
3. Allow the middle pulley and the shaft it is
mounted
on, to slide downward along the slot
on the back of the belt guard. This will relax
the tension of the V-belts.
The speed of the lathe is controlled by the posi-
tions
of the belts on the pulleys. The chart in
Figure 34 shows the various combinations of belt
positions
for achieving a range of six speeds.
Always disconnect the power to the machine
before making adjustments, set-up changes
or cleaning. Failure to do so could result in
injury to yourself and others.
Figure 35. Lock lever to adjust pulley.
4. Move the V-belts to the A and F positions.
5. Pull
the middle pulley and shaft back up the
slot to tension the V-belts.
6. Tighten
the lock lever.
Check the tension of the V-belts. They should
deflect
1
⁄2" with moderate finger pressure applied
half way between the pulleys. If more deflection
is present, re-tension the V-belts as in Step 5.
DO
NOT o
ver tension the V-belts. Frequent over
tensioning will result in premature bearing wear.
Tensioning Lock Lever