The Importance And Methods Of Spindle Leveling Adjustment - Sharp 16 Series Manual

4-5 The Importance and Methods of Spindle Leveling Adjustment

1. A lathe without proper leveling adjustment is likely to chatter. As a
consequence, this will influence the cutting accuracy of work piece and result in
poor roundness accuracy and finish. It is necessary to pay attention to the spindle
leveling from time to time in order to have the best cutting condition of the lathe.
Belt, 3-jaw chuck and the accumulative tolerances of parts on headstock, all such
factors, can make the lathe chatter. To get rid of those problems, our lathe is
especially designed to be equipped with leveling blocks mounted on the locking
nut at the rear side of the spindle. The leveling blocks can be properly adjusted
according to different condition. Please refer to following description & figure for
proper adjustment.
2. First, set up the spindle speed at 1350 rpm. Put the palm on left hand of the
headstock cover and press the switch by left hand. Then switch on the lathe to
make the spindle turn. Move the leveling block "A & C" left or right by hand
feeling until obtain the best leveling position. Then also move the leveling block
"B" left or right till the best position with same way. Adjust repeatedly till your
hand feels no chattering. Afterwards, change the spindle speed to 2000rpm or
880rpm and check the leveling in the same way as we did at 1350rpm. Finally,
for the leveling block set screw a, a', b.b. c.c. securely.
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