Cleaning and lubrication of the lathe chuck
The uniform clamping force, accuracy, and life span of the chuck
depend greatly on regular cleaning and sufficient lubrication. Rust,
scale, casting dust, and chips produce friction and reduce motion.
Therefore, the lathe chuck must be lubricated with LINOMAX
special grease paste at the 3 base jaw lubrication nipples by means
of a grease gun after every 20 – 30 operating hours. The lathe
chuck must be actuated two to three times without a workpiece to
achieve grease distribution by means of the completely extended
jaw stroke.
The valve system of the chuck must be occasionally lightly
lubricated with oil after the locking screw has been removed on
the face side of the chuck. The non-return valve is removed from
the bore hole, and the bore hole and the valve are cleaned to
remove dirt and any foreign bodies.
The fine serration of the base jaws and top jaws must be cleaned
when the hardened reversible jaws or soft top jaws are adjusted,
because otherwise the run-out accuracy will be reduced.
Foreign matter, such as rust, scale, casting dust, and fine chips,
penetrates into almost every chuck, even though there is optimal
sealing provided by the hardened guide bushing in the through-
hole and by the closed base jaws. Coolant washes away lubricant.
Therefore, every lathe chuck occasionally must be completely
disassembled, cleaned, and lubricated, and the sealing rings
possibly replaced. The time for which the chuck can be used
before full maintenance is required depends on the level of dirt it
accumulates and the clamping frequency. As such, it is not
possible to specify a generally applicable rule for this.
Please regularly check the lathe chuck for tightness by applying a
clamping force tester over a longer period of time (> 10 min.). The
clamping force should not drop during this period. Please adjust
the inspection interval to the operating conditions of the clamping
device, however, we do recommend conducting a check every
5,000 clamping cycles at the latest.
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