Tool Support; Spindle; Speed Range Adjustment; Table 1: Wood Turning Lathe Speeds - Powermatic 4224 Operating Instructions And Parts Manual

Tool Support

The tool support (shown in Figure 5), is designed to
allow adjustment for height, position on the bed, and
angle to the work. Your 4224 lathe comes standard
with the 14" tool support. Other supports are
available; consult the "Optional Equipment" list on
page 24.
Periodically the tool rest should be disassembled and
the parts cleaned and oiled to provide free movement
of the parts to ensure good clamp action.

Spindle

The spindle bearing preload is set at the factory for
general turning applications. There should be no "end
play" of spindle looseness along its axis. If any
looseness ever occurs it may be removed by
tightening the bearing lock nut on the left end of the
spindle. Be very careful not to overtighten the lock nut
or the spindle bearings will overheat. It should be
tightened just enough to remove the end play and the
spindle should rotate very freely.

Speed Range Adjustment

To provide the maximum horsepower to the spindle at
the very slow speeds, set the drive belt in the low
range.

TABLE 1: WOOD TURNING LATHE SPEEDS

DIAMETER OF WORK
Under 2"
2 to 4"
4 to 6"
6 to 8"
8 to 10"
10 to 12"
12 to 14"
14 to 16"
16" to 20"
20" to 24"
ROUGHING RPM
1520
760
510
380
300
255
220
190
175
175
To change speed ranges, open the access door in
front of the headstock, loosen the pivot lock handle
located in the motor tension slot, raise the motor up
by lifting up on the motor plate handle and relock the
lock handle to hold the motor up. There should be
sufficient slack in the belt to reposition it to the other
step. Loosen the tension lock handle and lower the
motor to tension the belt. Do not overtension; a very
light pressure on the motor plate handle is adequate
to prevent belt slippage.
GENERAL CUTTING
RPM
3000
1600
1080
810
650
540
460
400
325
260
FINISHING RPM
3000
2480
1650
1240
1000
830
710
620
500
400
9