MachineryHouse AL-346V, Instruction Manual

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3. Place the live center in your tailstock.
4. Attach a lathe dog at the spindle end to the bar stock
from step 1, and mount it between the centers as shown
in
Figure 29.
5. Turn approximately 0.25mm (0.010'') off the diameter.
6. Mount a dial indicator so that the plunger is on the
tailstock quill
(see Figure 30).
7. Measure the stock with a micrometer. if the stock is
wider at the tailstock end, the tailstock needs to be moved
toward the front of the lathe the amount of the taper (see
Figure 30 ).
— If the stock is thinner at the tailstock end, the tailstock
needs to be moved toward the rear of the lathe by at least
the amount of the taper (see
Figure 31 ). Figure 29
Figure 30 Figure 31
NOTICE
！
Do not forget to lock the tailstock to the ways after each adjustment.
8. Loosen the tailstock lock lever and adjust the tailstock offset by the amount of the taper.
9. Turn another 0.25mm (0.010'') off of the stock and check for any taper.
10. Repeat as necessary until the desired level of accuracy is achieved.
Drilling with tailstock
The tailstock quill has an Mt#3 taper with a lock slot at the bottom to accept tang-style tooling. If the tooling will
experience high torque loads during operation, it is critical to use tanged-style to prevent the drill bit or arbor from
spinning and galling the quill bore. Restoring a galled bore and taper can be time consuming or require quill
replacement.
However, tooling without tang-styled arbors can be used if they meet the following criteria.
• Very little torque loads will be applied to the tooling such as with centers.
• The tap or drill bit is not larger than 12.5mm (1⁄2" ) in diameter.
• The end of the arbor is solid, or has a screw threaded into the hole making the end of the arbor solid. Installing an
arbor with a solid end is important to avoid the arbor from becoming stuck in the quill. Some arbors equipped with
the hole are too short to be exposed in the drift slot for removal, and the tailstock pin has no surface to push against
when using the handwheel to remove the arbor. As a result, the arbor becomes stuck requiring the quill to be removed
and the arbor driven out with a punch.
Page 27 Instructions Manual for AL-346V (L555D) 01/09/2017