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G0657/G0658 Benchtop Lathe
-19-
5. Move the belt tension lever down, adjusting
tension so that when the belt is pressed with
moderate force, ½" of belt deflection is mea
-
sured as shown in
Figure 19, then tighten
belt tension lever screw.
6. Close the rear covers.
Figure 19. Belt deflection.
4. Locate the desired speed on the speed chart
on the rear of the lathe bed, and move the
belt to the necessary grooves on the motor
and spindle pulleys.
For Example: As indicated in the speed
chart, on the
G0657, belt position B creates
an RPM range of 600-1800 (Figure 18).
Figure 18. G0658 Spindle speeds.
The variable speed motors on the Model G0657
and G0658 allow the spindle speed to vary
within three separate ranges. For greater speed
variations, the belt in the headstock can be
repositioned. A label on the top of the headstock
illustrates the belt positions and their speeds.
Changing Speed
Ranges
3. Open the rear access covers (Figure 17).
Figure 17. Side and rear access covers.
Lower Access
Cover
Upper Access Cover
To change speeds:
1. DISCONNECT LATHE FROM POWER!
2. Loosen the belt tension screw handle (Figure
16). Be sure the belt tension lever moves
freely to release tension from the belt.
Figure 16. Belt tension lever.
Belt Tension Lever
Belt Tension Handle