CHUCKING C-3
WARNING
10.
Use only the specified bolts to mount the chuck and chuck jaws and
tighten them to the specified torque. Check at regular intervals that
the bolts are securely tightened. If the bolts are not tightened to the
specified torque the workpiece might fly out, causing serious
injuries or damage to the machine, and the chuck could be damaged.
11.
When machining long workpieces, always hold the free end of the
workpiece securely with a steady rest (if featured) or a bar feeder (if
featured). If you do not support the free end the workpiece could
bend or shake while the spindle is rotating, causing accidents
involving serious injuries or damage to the machine.
12.
When clamping or unclamping a workpiece in the chuck, ensure that
your hands will not be trapped by the workpiece or soft jaws. If you
work without sufficient care you could be seriously injured.
13.
Periodically disassemble and clean the chuck. Apply grease to the
chuck every day. If chips or coolant enter the chuck, or if the grease
runs out, the chuck gripping force will be reduced. If the spindle is
rotated in this condition the workpiece will fly out, causing serious
injuries or damage to the machine.
14.
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.
15.
Since forged and cast workpieces have hard chucking portions due
to scale, use hard jaws for these workpieces. If the chucking contact
has to be a point or line contact, for example when clamping on the
draft of a casting, use spikes embedded in the jaws. If three soft
jaws are used, shape them so that the workpiece is clamped at six
points; avoid face contact between the jaws and workpieces with
scale on them.
If a workpiece is machined while not clamped stably, it may fly out of
the chuck due to cutting resistance, causing serious injuries or
damage to the machine.