Maintenance & Adjustment; Headstock - Sharp 16 Series Manual

7. MAINTENANCE & ADJUSTMENT
Please refer to following items for machine problem solution and maintenance for
obtaining the best function and the long service life of the lathe.

7-1 Headstock

1. To avoid the headstock cover oil leaking: Once the headstock cover is opened,
use cloth to clean the connecting surface grease, then can close the cover and
tighten the set screw.
2. To avoid the returning oil route being blocked: There are two reasons which
cause the oil leaking from headstock front cover; one is over oiled; the other is
that the returning oil route is blocked. It should take off the headstock cover.
Then blow air to the small hole, which is on the top of the front bearing, by air
gun several times. And rotate the spindle at the same time to clean up the blocked
returning oil route.
3. Spindle bearing adjustment: The front and middle bearings of the spindle is
precision taper roller type. It requires to adjust the bearings to have suitable
preload for maintaining the high accuracy and the best rotating functions. After
long use the locking nut G may be loose a little bit and result in uneven cutting
surface. For adjustment, loosen the setscrew by hexagon wrench. Then tighten the
locking nut G to obtain the suitable preload. Do not over-tighten as over-preload
will make the bearings hot, damage the rotating surface of the bearings and lower
down the bearing motion functions. After adjustment, be sure to tighten the
locking screw completely.
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G
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