Hitachi Koki CN16SA - 998030 Punch For CN16 Instruction Manual page 13

CAUTION:
If the punch and die are used longer than the specified service life, the die holder will
be subject to excessive stress and may break off.
When a 1/16" (1.6 mm) mild steel trapezoidal plate is cut, wear will be especially quick.
Replace the punch and die as soon as possible after reaching the service life.
2. Punch and die replacement (see Fig. 8)
CAUTION:
During the following operations, use care to prevent dirt adhering inside the gear
cover, inside the die holder and around the piston.
(1) Punch replacement
(a) Loosen the M8 hexagon socket set screw mounting the die holder (see Fig. 4) and
remove the die holder.
(b) Loosen the M5 hexagon socket set
screw fastening the punch to the piston
and pull out the punch.
(c) Insert the new punch while aligning the
taper hole of the punch and the
direction of the M5 hexagon socket set
screw, then securely tighten the
hexagon socket set screw (see Fig. 9).
(2) Die replacement
Loosen the 2 machine screws and replace
the die.
(3) Lubrication
When the above replacement operations
are completed, apply a suitable amount of
machine oil to the sliding surfaces around
the punch and die and operate the machine
without a load.
Hexagon Socket
Hd. Set Screw
Punch
M5
Machine Screw M3
Taper Hole
Punch
English
Gear Cover
Piston
Die Holder
Die
Fig. 8
Hexagon Socket Hd.
Set Screw M5
Piston
Fig. 9
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