33
The threading dial may not be used for Module. D.P. and
metric threads cutting on Imperial Leadscrew lathe or
imperial threads cutting on Metric Leadscrew lathe. To cut
these threads, the half-nut must be kept closing on the
leadscrew from the start of the thread until the end. When
the end of the thread is reached, the tool must be quickly
withdrawn from the workpiece, while stopping the spindle.
Then while half-nut are still engaged, reverse the spindle,
which will move the carriage backwards towards the
starting point. When the starting point is reached, re-
engage the motor forward and move the cutting tool into
the workpiece at the desired spot.
FOUR WAY TOOLPOST
Release the too post clamp lever counter clockwise and
turning the toolpost for change, then re-tighten clamp lever.
TAILSTOCK
The tailstock slide along the bedways and may be
anchored in any position by press the clamp lever. To
slide the quill from rotating the tailstock handwheel, the
quill lock lever can lock the quill. For small tapers the
tailstock can be set over by loosening the clamp lever and
both fixed screws under the front and the rear of the
tailstock base. Then to adjust the both sides set over
screw to the desire position.
TAPER ATTACHMENT
For taper turning guide (A) is set to the required angle and
the nuts (N) are tightened so the guide is clamped
securely. The screw (E) holding the cross feed screw nut
is removed so as to give the cross slide free movement.
Swivel the compound to 90
°
so it is perpendicular to the
work. The compound is used for depths of cut.
INCH LEADSCREW FOR
INCHES THREADS
CUTTING ONLY
METRIC LEADSCREW FOR
METRIC THREADS
CUTTING ONLY
Fig.20
