LATHE CONTROLS
LATHE SPEEDS
Before using the lathe, the hub on the end of the lathe spindle must be pulled out as shown in
Figure 16.
To ease engagement of this hub, slowly rotate the spindle by hand while gently pulling the hub.
Figure 16.
Speed chart
The speed of the lathe is controlled by the position of the belts on the pulleys. The chart in
Figure 16
shows the various combinations of belt positions for achieving a range of 6 speeds.
Example:
To select a spindle speed of 310 R.P.M., place a belt on the 3
rd
sheave (from the outermost sheave) of the
middle pulley and the 2
nd
sheave of the spindle pulley. Place a belt from the first sheave on the motor
pulley to the first sheave of the middle pulley.
To change belt position:
1. Unplug the machine.
2.
Loosen the tensioning nut located just above the motor.
See Figure 17.
3.
Loosen the nut on shaft for the middle pulley.
See Figure 18.
4.
Lift the motor and remove the lower belt from the Model B motor pulley.
5.
Place the upper belt in the desired position.
6.
Place the tension belt in the desired pulleys.
7.
Pull tension on the upper belt with the middle pulley and tighten the nut loosened in
step 3.
8.
Tighten the tensioning nut just above the motor until there is ¼” deflection with moderate pressure.
Do
not over tighten.
Figure 17.
Tension nut shown
Figure 18.
Loosen this nut to adjust pulley.
Chester UK Model B
14
