TAPER ATTACHMENT
Fig. 5 - Taper Attachment
The taper attachment is furnished as
an extra and only when ordered. It is a
self-contained unit bolted to the back of
the carriage and traveling with it. How-
ever, all carriages are machined and jig
drilled for application of taper attach-
ment, so this can be ordered at a later
date and installed on a machine already
in service, by the customer, quite easily.
The taper attachment scale is gradu-
ated for both "inches" per foot and ((de-
grees,, of taper, both readings being on
thesamescale and indicated by the same
pointer.
To set the attachment for any desired
taper, loosen nut "A" (See Figure 5),
holding the guide plate to the sliding
shoe, and nuts "B,, and I(Cu at the ends
of the swiveling bar. Set the swiveling
bar to the desired taper as determined
by the scale, using the adjusting screw
c(L" and tighten the nuts mentioned
above. Except, when setting the taper.
these nuts should always be tight, even
when the attachment is not in use.
CAUTION: Make Sure nuts 6CB% and 66C% are loose when using adjusting screw 66L" to
prevent springing swiveling bar.
To engage the taper attachment) loosen clamp screw "K" and tighten nuts ((D" When
taper attachment is not in use) clamp screw "K" must be tight) and nuts "D" must be loose.
Nut "E,, should be tight at all times. If taper attachment is not in regular or frequent service)
the locking arm should be removed from the bed to reduce wear on the bedway. Be sure to have
tool on center line when taper turning.
If the taper attachment is used consistently on one job) it is advisable to shift the sliding bar
occasionally to more equally distribute wear on the swiveling bar.
The compound rest and taper attachment slides should move freely) but there should be no
looseness or play. If chatter or non-uniform taper occurs, this is usually the result of looseness and
can bc corrected by adjusting the compound rest base and top slide gibs, and gibs "F", CCG" and
"H" on the taper attachment slides. Too tight an adjustment of the gibs can cause a binding
action, which, when taper turning) will cause slides to jump instead of moving smoothly and has
been known to cause rather equally divided marks on the workpiece, sometimes incorrectly
attributed to gear marks.
Should any looseness or back-lash develop between the cross feed screw and nuts, this can
be eliminated by loosening screw "I,, and tighteningscrew"J,,} then re-tightening screw (T,. Loose-
ness or play in the cross feed screw end thrust bearings can be taken up by adjusting nut "M,,.
By the addition of a few parts, the taper attachment can be converted to a form-turning
attachment.
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