Powermatic 4224B Centers Installing/removing, Vacuum chuck Installing/removing, Spindle lock

9.7Centers: Installing/removing

1.Disconnect lathe from power source.

2.To install a spur center or live center (a spur center should first be mounted to your workpiece; see section 11.4), clean tapered end of center and inside of headstock taper spindle, then push center into headstock spindle.

3.To remove a spur center or live center, first remove workpiece from lathe. Insert knockout rod (Figure 28) through hole in handwheel and firmly tap the tapered end of spur center. The sliding collar on the knockout rod helps give the necessary impact without having to use a mallet against the end of the rod.

IMPORTANT: Hold the center by either placing your thumb and forefinger on outside diameter of spur center, or wrapping center with a rag. The center can be damaged if allowed to fall.

Figure 28

If at any time you will be reversing spindle rotation, make sure the two set screws in the face plate are tight! Failure to do this may cause the face plate to loosen from the headstock spindle.

6.To remove face plate, loosen the two set screws. Engage spindle lock, and turn face plate counterclockwise with face plate wrench.

9.10Vacuum chuck: Installing/removing

1.Disconnect lathe from power source.

2.Lock spindle.

3.Install vacuum chuck onto threads of headstock spindle and rotate clockwise hand- tight. When lathe is turned on (forward rotation), the rotational force will snug the vacuum chuck even further onto the threads.

4.Make sure vacuum adaptor is inserted into handwheel, and air supply is connected. Turn on air system and place workpiece against vacuum chuck.

If at any time you will be reversing spindle rotation, make sure the set screws in the vacuum chuck are tight! Failure to do this may cause vacuum chuck to loosen from headstock spindle.

5.To remove vacuum chuck, turn off air supply, and loosen the two set screws. Engage spindle lock, and turn vacuum chuck counter- clockwise with face plate wrench.

9.8Spindle lock

1.Push spindle lock button (see G, Figure 33), and rotate spindle slightly until button goes entirely into recess. Slide plate down over button.

2.Rotate spindle by hand until it locks.

3.Slide plate upward to release spindle.

IMPORTANT: Always release spindle lock before turning on lathe.

9.9Face plate: Installing/removing

1.Disconnect lathe from power source.

2.Mount face plate to your bowl blank.

3.Lock spindle.

4.Install face plate onto threads of headstock spindle and rotate clockwise hand-tight. When lathe is turned on (forward rotation), the rotational force will snug the face plate even farther onto the threads.

5.Face plate is now ready for turning.

19

9.11Comparator

The spindle comparator consists of two comparator centers inserted into the brackets at rear of lathe. The comparator is used to mount a finished, or “reference” spindle, from which measurements can be taken, the measurements being transferred to the new piece being turned.

Guard must be removed to use spindle comparator. Use caution and wear a face mask when turning without guard installed.

1.Remove guard from bracket and swing lamp holder away.

2.Install comparator spur center into guard bracket, by lifting up on plunger and inserting comparator spur center until its point is about even with the point of the spur center in the headstock spindle. See Figure 29. The plunger in the bracket should engage one of the holes in the comparator center at this position.