www.hoffmann-group.com
25
DE
EN
FR
IT
ES
Fault
Cause
Rectification
Sluggishness
of the movable jaw.
Swarf contamination of lower
section or spindle nut travel
blocked.
Remove spindle and
clean lower section.
Oil guide tracks and friction sur-
faces.
Re-install the spindle.
Coupling disengages before
reaching the workpiece.
Jamming of the
bayonet pressure pad.
The lateral knurled screw must
not press against the pressure
pad but must instead thread
into the lateral bore on the
pressure pad; the pressure pad
must have
play
.
Remove swarf from the pres-
sure pad recess.
Jamming of the trapezoidal
spindle in the clamping block
due to swarf ingress.
Remove the spindle from the
vice.
Unscrew the spindle from the
clamping block.
Clean both parts.
Check and clean wipers on both
sides.
Use oil for installation;
do not
use grease
.
Spindle cannot be turned.
Mobile jaw was secured with
excessively long screws, which
are pressing against the spin-
dle.
Use correct screw length.
Vice applies no or insufficient
clamping force.
Sluggishness of the movable
jaw.
See above.
Coupling was not engaged the
last time the workpiece was re-
leased.
Rotating the crank anti-clock-
wise while holding the spindle
radially will cause the coupling
to engage tangibly.
Clamping of elastic workpieces
or packages.
Mechanical pre-clamping, then
power clamping.
Force adjustment on lock ring
jammed.
Swarf in the mechanism.
Send the spindle in for repair.
Leave the crank pin in the spin-
dle.
Clamping force cannot be re-
leased.
Power intensifier defective.
Send the spindle in for repair.
9. Troubleshooting
