Model G0740 (Mfg. Since 11/12)
-51-
Setting Spindle Speed
Selecting one of the 16 spindle speeds available
is a combination of configuring the two-speed
motor switch, the spindle range lever, and the
spindle speed lever shown in Figure 69.
Configuration Examples
Using the controls on the lathe, follow along with
these two examples for setting the spindle speed
to gain a better understanding of this task.
Setting Spindle Speed of 215 RPM
1. Make sure the spindle is completely stopped
and the spindle lever is in the OFF (middle)
position.
2. Turn the motor switch (see Figure 69) to the
low (left) position.
Note: The green color of the motor switch
low position corresponds to the column in the
right-hand speed chart with the green header
that contains the speed of 215 RPM.
3. Move the spindle range lever to the right so
that the arrow on top of its hub points toward
the right-hand speed chart (see the illustra-
tion in Figure 70).
Note: If necessary, use the chuck key to rock
the spindle back-and-forth to help mesh the
gears as you move the levers.
Figure 70. Setting the spindle speed to 215
RPM.
A
B
C
D
Spindle
Range Lever
Pointing To
Right-Hand
Speed Chart
Spindle Speed
Lever Set To
“B” (215 RPM)
4. Position the spindle speed lever so that the
"B" is directly under the arrow on the head-
stock.
Note: You will hear a distinctive "click" when
the spindle speed lever is in the correct posi-
tion.
The lathe is now set for a spindle speed of 215
RPM.
Figure 69. Spindle speed controls.
The motor switch controls the speed of the spindle
motor, either a low speed of 1725 RPM or a high
speed of 3450 RPM.
The spindle speed and range levers control the
gear configuration in the headstock to produce
the selected spindle speed. The spindle range
lever selects speeds in the left- or right-hand
speed chart to be available for the spindle speed
lever. The spindle speed lever selects one of the
speeds available in the active chart and column.
Operating the lathe at spindle speeds higher
than 315 RPM when the high (H) gearbox
range is selected could result in gearbox
damage. Always use spindle speeds of
315 RPM or lower when using the high (H)
gearbox range.
If the spindle is rotating when attempting
to change the spindle speed, the headstock
gears will suffer damage! ALWAYS make
sure the spindle is completely stopped
BEFORE using the headstock control levers
to make changes.
Motor
Switch
Spindle
Range
Lever
Spindle Speed
Lever
