Southbend 14" Turn-X Toolroom Lathe SB1039 - Manual (Page 52)

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For Machines Mfg. Since 5/11 14" TURN-X ® Toolroom Lathe O P E R A T I O N
Operating the lathe at spindle speeds higher
than 350 RPM when the high (H) gearbox
range is selected could result in gearbox
damage. Always use spindle speeds of
350 RPM or lower when using the high (H)
gearbox range.
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 67.
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.
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.
Figure 67. Spindle speed controls.
Motor
Switch
Spindle Speed
& Range Levers
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 67) 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
illustrated in Figure 68).
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 68. Setting the spindle speed to 215 RPM.
A
B
C
D
Spindle
Range Lever
Pointing To
The 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
headstock.
Note: You will hear a distinctive "click" when the
spindle speed lever is in the correct position.
The lathe is now set for a spindle speed of 215
RPM.