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Tailstock Handwheel; Tailstock Quill Lock; Tailstock Locking Handle; Tailstock Offset Feature - OTMT SC4 User Manual And Installation Manual

Bench lathe.
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X-Y Auto Feed Lever
In the lower position, the X-Y Auto Feed lever
moves the carriage along the ways, much like
the Power Feed lever, but at a slower speed.
This feature is useful for making fine finishing
cuts using power feed.
In the upper position it functions as a power
cross-feed control and moves the cross slide
away from the operator towards the back of the
lathe. When the motor is reversed, the power
cross feed moves the cross slide towards the
operator. In the center, "0" or neutral position,
the feed is disengaged.

Tailstock Handwheel

Rotating the tailstock handwheel moves the
tailstock quill (also known as the tailstock ram)
in and out of the tailstock. This feature is used
during drilling operations and when a center is
used in the tailstock to support long stock.

Tailstock Quill Lock

When the tailstock is used in stationary
operations, as when supporting the end of long
stock, the quill may be locked in place using
the tailstock quill lock. A quarter turn of the
handle is sufficient to lock or unlock the quill.

Tailstock Locking Handle

The tailstock locking handle on the rear of the
tailstock locks the tailstock at any location
along the ways. The tailstock is locked by
pulling the lever towards the operator and
released by pushing the lever away from the
operator. If necessary, the clamping action
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may be adjusted by removing the tailstock from
the end of the lathe ways and adjusting the
locking nut on the underside of the tailstock.
A stop screw located between the ways at the
right end of the lathe prevents the tailstock
from falling off the end of the lathe. This screw
must be removed before sliding the tailstock off
the end of the ways for adjustment.

Tailstock Offset Feature

To turn long tapers on a workpiece mounted
between centers, the tailstock may be offset
horizontally from the lathe centerline. To offset
the tailstock, loosen the two small setscrews
below the cam lever on the right side of the
tailstock, then loosen the two setscrews on the
front and back sides of the tailstock.
Tailstock Offset Indicator
The two screws on the front and back of the
tailstock work in opposition to each other to
offset the tailstock; as one screw is tightened
the other must be loosened by a corresponding
amount. The amount of offset may be gauged
by observing the offset indicator guide on the
right end of the tailstock.
After completing the taper operation, the
tailstock is restored to its normal position at the
horizontal centerline. Accurate alignment using
a test bar and dial indicator is recommended.
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