Live Center |
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The live center is used to support stock which is too long to be supported by the chuck alone. Stock protruding more than three times its diam- eter should be supported by the live center.
Figure 4. Live center installed in tailstock.
The tailstock barrel and live center have a Morse taper #3. Before assembling these, insure that the mating surfaces are “white glove” clean. These parts will last longer and remain accurate when properly maintained. Morse tapers will not interlock when oil is present on the mounting sur- faces. Insert the end of the live center into the tail- stock bore until it seats. The force of a mounted workpiece will fully seat the taper.
When using a live center, the tailstock barrel should protrude about 1⁄2'' and not more than 3''.
See Figure 4.
To remove the live center, back the tailstock bar- rel all the way into the tailstock casting. The live center will pop out. Be sure to catch it when it comes out to avoid damaging the tip.
The steady rest supports long, small diameter stock that otherwise could not be turned. The steady rest can also replace the tailstock to allow for cutting tool access at the outboard end of your workpiece.
To mount the steady rest:
1.Secure to bedway from below with the lock- ing plate.
2.A single hex bolt, along with a nut and washer, is used to hold the steady rest in place. See Figure 5.
3.The bearing surfaces on the steady rest should receive periodic lubrication while in use to prevent premature wear.
Figure 5. Steady rest in place.
G4002/3 Gear Head Lathes |
