FOR SAFE OPERATION -29-
SO-NL-B17E/O
WARNING
17.
If there is a gap between the workpiece rear end face and the chuck
locator face or the jaw face on which the workpiece should be
seated, and the workpiece rotation center line is tilted with respect to
the chuck rotation center line, or if the workpiece has burrs on it
(cast or forged workpiece), the depth of cut will exceed the planned
amount and the cutting force will therefore exceed the workpiece
holding capacity of the chuck. If such conditions apply while the
spindle is rotating, the workpiece will fly out, causing serious
injuries or damage to the machine. If such a problem is anticipated,
carry out test cutting at a low spindle speed to ensure safety.
18.
Never leave the top jaws and/or T-nuts in the chuck after they have
been loosened. If the spindle is started with the loose top jaws and
T-nuts left in the chuck they will fly out, causing serious injuries or
damage to the machine.
19.
Lubricate the chuck every day with the specified grease. If the chuck
is not lubricated properly, problems such as reduced gripping force,
abnormal chuck jaw wear, and seizure will occur. If machining is
carried out under such conditions, the workpiece will fly out,
causing serious injuries or damage to the machine. Also note that
the use of grease other than the specified grade will accelerate
corrosion or wear, causing loss of gripping force.
20.
Clean out any chips that accumulate inside the chuck.
Accumulation of chips inside the chuck reduces the gripping force
and shortens the jaw stroke. If machining is carried out under such
conditions the workpiece will fly out, causing serious injuries or
damage to the machine.
21.
Give full consideration to the type of chuck and cylinder used when
setting the chucking pressure. Even if the same hydraulic pressure
is applied to the chuck, the chuck gripping force will vary according
to the manufacturer and type of chuck and cylinder.
For details on the chuck gripping force, consult the chuck and
cylinder manufacturers.
If the chuck gripping force is different from that intended, the
workpiece could fly out when the spindle is started, causing serious
injuries or damage to the machine.
22.
Only a qualified technician should perform hoisting work.
Operation of the crane by a person unfamiliar with safe operation
practices could cause accidents involving serious injuries or
damage to the machine.
