South Bend Tools Oil Country Series, Owner'S Manual

Page: 30 / 68

South Bend Tools South Bend Tools
-28-
For Machines Mfd. Since 7/19 Model SB1065F–SB1071F
O P E R A T I O N
Tailstock
The tailstock is typically used to support long
workpieces by means of a live or dead center.
It can also be used to hold a drill or chuck to
bore holes in the center of a part. An important
feature of this tailstock is that it is equipped with
a hand crank gear reduction box and lever (see
Figure 28). When moved to the Low position,
the handwheel operates with additional torque
for center drilling large diameter holes in the
end of a workpiece. When in High position, the
handwheel operates at a typical ratio.
Gear Reduction Box Gear Reduction Box
and Lever and Lever
Graduated Dial
Increments .....................................................0.001"
Quill Travel One Revolution (High) .............0.200"
Quill Travel One Revolution (Low) ..............0.065"
Quill Scale Increments
Inch .................................(0–9
5
⁄
8
" (
1
⁄
16
" graduations)
Metric .....................0–245 mm (1mm graduations)
Figure 28. Tailstock reduction box and lever. Figure 28. Tailstock reduction box and lever.
Figure 29. Tailstock graduated dial. Figure 29. Tailstock graduated dial.
Figure 30. Quill scale ( Figure 30. Quill scale (
1
⁄
16
" and 1mm graduations). " and 1mm graduations).
The tailstock can be offset from the spindle
centerline for turning tapers, and realigned
again. Move the tailstock top casting toward the
front of the lathe to machine a slight taper at the
tails tock end. Conversely, position the tailstock
top casting toward the back of the lathe to cut a
taper at the spindle end.
Note: The marks on the offset indicator are
arbitrary. For a precise offset, use a dial indicator
to check quill movement while adjusting the
screws.
Tools Needed Qty
Hex Wrench 8mm .................................................1
Box-End Wrench 32mm ........................................1
Offsetting/Aligning Tailstock
1. Loosen both hex nuts (see Figure 31) to
release clamping pressure between tailstock
and lathe bed.
Figure 31. Tailstock offset controls. Figure 31. Tailstock offset controls.
Cap Screw Cap Screw
(1 of 2) (1 of 2)
Offset Offset
Scale Scale
Adjustment Adjustment
Set Screw Set Screw
(1 of 2) (1 of 2)
Hex Nuts Hex Nuts
Jack Stud Jack Stud
(1 of 4) (1 of 4)
Gear Reduction Gear Reduction
Lever Lever
Reduction Reduction
Gearbox Gearbox
To offset tailstock: