Makita JN3200 Manual De Instrucciones página 6

Punch replacement (Fig. 5, 6 & 7)
Important:
Always be sure that the tool is switched off and
unplugged before replacing the punch.
Fit the wrench provided onto the lock nut and tap the
handle lightly with a hammer to loosen the lock nut.
Take off the die holder and use a wrench to remove
the screw. Then remove the punch.
To install the punch, insert it into the punch holder with
its cutting edge facing forward so that the pin in the
punch holder fits into the groove in the punch. Install
the screw and lock nut. Then tighten them securely.
NOTE:
When installing the screw and lock nut, be sure to
tighten securely. If they become loose during opera-
tion, the tool may break down.
Punch & die service life (Fig. 8 & 9)
Replace or sharpen punch and die after cutting the
lengths indicated in the accompanying table. Their
life, of course, depends upon the thickness of mate-
rials cut and lubrication conditions.
Replace after 150 m of 3.2 mm
Punch
Sharpen after 300 m of 3.2 mm
Die
When cutting is poor even after replacing the punch,
sharpen the die. Grind down the dull edge shown in
Fig. 8 using a grinder. After rough-grinding the dull
portion, finish with a dressing stone. Stock removal
should be about 0.3 to 0.4 mm.
When installing ground die, a clearance of 3.5 to
4.0 mm should be obtained by attaching one or two of
the washer provided, as shown in Fig. 9. Failure to
have the proper clearance will result in vibration
during cutting.
NOTE:
The die can be sharpened two times. After two
sharpenings, it should be replaced with new one.
6
steel sheet
steel sheet
MAINTENANCE
CAUTION:
Always be sure that the tool is switched off and
unplugged before carrying out any work on the
tool.
Replacement of carbon brushes
(Fig. 10 & 11)
Replace carbon brushes when they are worn down to
the limit mark. Both identical carbon brushes should
be replaced at the same time.
To maintain product safety and reliability, repairs,
maintenance or adjustment should be carried out by a
Makita Authorized Service Center.