Figure 22
Belt shown in LOW speed range position
9.11Checking spindle play
The spindle bearing has been set at the factory for general turning applications. There should be no "end play" or looseness along the spindle’s axis. If any looseness should ever occur, it may be rectified by carefully tightening the bearing lock nut on the spindle, as follows. (See Figure 23).
1.Use a screwdriver to carefully bend back any tabs on the tabbed lock washer (C, Figure 23) that interfere with the insets on the bearing lock nut (B, Figure 23).
Figure 23
2.Place the end of a flat head screwdriver down against one of the insets of the bearing lock nut (B, Figure 23).
3.Tap the handle of the screwdriver with a mallet so that it turns the bearing lock nut (B, Figure
23)tighter in a clockwise direction. Rotate the bearing lock nut only about 1/16” at a time.
Do not over tighten the bearing lock nut or the spindle bearings will overheat.
4.The bearing lock nut should be tightened just enough to remove the end play and the spindle should still rotate very freely. Run the lathe for a time, and check for heat from the spindle bearings. If the bearings are running hot, the bearing lock nut is too tight and should be loosened slightly.
5.After the bearing lock nut (B, Figure 23) has been properly adjusted, carefully bend back into place any tabs on the tabbed lock washer (C, Figure 23).
9.12Sheave/drive belt replacement
Replacing the spindle sheave can be a difficult procedure; it is recommended that the headstock be taken to an authorized service center for this.
1.Disconnect Lathe from power source.
2.Loosen the pivot lock handle (A, Figure 22) and lift up the tension handle (B, Figure 22) to raise the motor.
3.Tighten the pivot lock handle (A, Figure 22) to hold the motor in the raised position. Slip the belt off the pulleys.
4.Loosen the two set screws on the handwheel (A, Figure 23) with a hex wrench, and pull the handwheel off the headstock spindle.
5.Loosen and remove the bearing lock nut (B, Figure 23) and tabbed lock washer (C, Figure 23).
6.Slide the spindle a little way out of the headstock, just enough to remove sheave or belt.
NOTE: You may have to tap the end of the spindle with a wood block to move it. (Do NOT use a steel face hammer directly against the spindle.)
7.If replacing the spindle sheave, loosen the two set screws (C, Figure 22), and slide the sheave off the spindle.
8.Install the new spindle sheave, loosely securing the two set screws. Make sure the sheave is oriented properly.
9.Slide the spindle back into place, install tabbed lock washer (C, Figure 23), and bearing lock nut (B, Figure 23). Check for any spindle play at this point (See “Checking Spindle Play”).
10.
11.Align the new sheave (see sect. 9.10, Sheave and Belt Alignment) then tighten the two set screws (C, Figure 23) securely on the sheave.
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