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20
11.5 Aligning tailstock to headstock
1. Headstock and tailstock have been aligned by
the manufacturer and should not require
attention. If future adjustment should ever be
needed, proceed as follows. (Make sure that
twist in the lathe bed is not contributing to the
problem, refer to sect. 6.3.)
2. Fit a 12” ground, center-drilled, steel bar
between centers of headstock and tailstock
(Figure 11-6).
3. Fit a dial indicator to the top slide and traverse
the center line of the bar. If it indicates a taper,
adjustment is needed.
4. Align tailstock using the off-set screws at front
and back until tailstock is aligned.
Figure 11-6
11.6 Shear pin replacement
The lead screw and feed shaft are equipped with
shear pins, which are designed to break in order to
protect the drive system against overload. A broken
shear pin must be replaced. Replacements are
provided in the toolbox.
Knock out the broken pin; line up the holes and
insert new pin.
11.7 Steady rest adjustment
Always lubricate the fingers with grease before
using the steady rest. The point at which the fingers
contact the workpiece require continuous lubrication
to prevent premature wear.
To set the steady rest (see Figure 11-7):
1. Loosen hex nut (L) to slide steady rest along the
ways to desired position.
2. Loosen socket head screw (M) until it can be
pivoted out of its slot.
3. Loosen three hex nuts (N) and back off set
screws to allow finger movement.
4. Back off fingers (O) using knurled handles (P).
5. Pivot the collar on its hinge and position steady
rest around workpiece.
6. Firmly tighten hex nut (L).
7. Set fingers snug to workpiece. Fingers should
be snug but not overly tight.
8. Loosen three hex nuts (P
1
), and tighten set
screws (P
2
) to secure finger setting.
Figure 11-7
11.8 Follow rest adjustment
The follow rest mounts to the saddle with two socket
head cap bolts. The follow rest should be mounted
so that locking setscrews/nuts point away from
chuck.
The sliding fingers are set similar to those on the
steady rest – free of play, but not binding. The place
of the third finger is taken by the cutting tool.
Always lubricate the fingers sufficiently with grease
before operating. The point at which the fingers
contact the workpiece require continuous lubrication
to prevent premature wear.
11.9 Belt tension
Remove end cover. Loosen bottom nut and turn top
nut (R, Figure 11-8) to push motor downward to
increase tension on belt. Retighten bottom nut.
Light finger pressure midway between motor and
headstock pulleys should cause approximately 3/4-
inch movement, when belt is properly tensioned.
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