South bend SB1049, Manual

Page: 56 / 136

-50-
For Machines Mfg. Since 5/11 13" Heavy 13
®
Gearhead 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 8 spindle speeds available is
a combination of configuring the spindle range
lever and the spindle speed lever shown in
Figure 66.
The spindle speed and range levers control the
gear configuration in the headstock to produce
the selected spindle speed. Refer to the chart
below for the available spindle speeds available.
Low Range (RPM) High Range (RPM)
80 488
127 772
200 1245
320 2000
ALWAYS make sure the spindle is completely
stopped BEFORE using the headstock control
levers to make changes. If the spindle is
rotating when attempting to change the
spindle speed, the headstock gears will suffer
damage!
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 200 RPM
1.
Make sure the spindle is completely stopped
and the spindle lever is in the OFF (middle)
position.
2.
Move the spindle range lever to the right
so that the arrow on top of its hub points
toward the
L
(low) label (see the illustrated
in Figure 67).
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 67. Setting the spindle speed to 200 RPM.
488
8
0
200
0 3
20
77
2
12
7
1245 200
H L
Spindle Range
Lever Set to LOW
Spindle Speed
Lever Set to 200 RPM
3. Move the spindle speed lever so that the 200
on its hub is also pointing at the L label.
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 200
RPM.
Figure 66. Spindle speed controls.
Speed
Lever
Spindle Range
Lever