Tailstock
The tailstock on the Model G4002/3 is aligned at the factory with the headstock. It is recommend- ed that you take the time to ensure that the tail- stock is aligned to your own desired tolerances. To align the tailstock:
1.Center drill a 6'' long piece of bar stock on both ends. Set it aside for use in step 4.
2.Make a dead center by turning a shoulder to make a shank. Flip the piece over in the chuck and turn a 60° point. See Figure 28. As long as it remains in the chuck, the point of your center will be accurate to your spin- dle’s axis. Keep in mind that the point will have to be refinished whenever it is removed and returned to the chuck.
Figure 28. Finished dead center.
3.Place the live center in your tailstock.
4.Attach a lathe dog to the bar stock and mount it between the centers. See Figure 29.
5.Turn approximately .010" off the diameter.
Figure 29. Bar stock mounted on centers.
TIP
Before making adjustments to the tailstock, mount a dial indicator so that the dial’s plunger is on the tailstock barrel. See Figure 30.
Viewed from above. |
Figure 30. Adjusting for headstock end taper.
6.Measure the stock with a micrometer. If the stock is fat at the tailstock end, the tailstock needs to be moved toward you the amount of the taper. See Figure 30.
G4002/3 Gear Head Lathes |
