M1109 Combo Lathe/Mill
5.Place the live center in the tailstock.
6.Attach a lathe/mill dog to the bar stock and mount it between centers.
7.Turn approximately 0.010" off the diameter.
8.Measure the stock with a micrometer.
•If the stock diameter is thicker at the tailstock end, the tailstock needs to be moved toward you half the distance of the amount of the taper (see
Figure 28).
•If the stock diameter is thinner at the tailstock end, the tailstock needs to be moved away from you half the distance of the amount of the taper (see Figure 29).
9.Mount a dial indicator so the dial plunger is on the tailstock barrel before making adjustments to the tailstock.
10.Turn another 0.010" off of the diameter and check for a taper. Repeat this process as necessary until the desired amount of accuracy is achieved.
Figure 28. Tailstock adjustment option #1.
Figure 29. Tailstock adjustment option #2. | OPERATIONS |