Makita JN3200 Manual De Instrucciones página 5

OPERATION
Pre-lubrication
Coat the cutting line with machine oil to increase the
punch and die service life. This is particularly important
when cutting aluminum.
Cutting method
Smooth cutting is achieved by holding the tool upright
and applying gentle pressure in the cutting direction.
Apply tool oil to the punch about every 10 meters (32.8
feet) of mild steel or stainless steel to be cut. Light oil or
kerosene should be used to keep an aluminum lubricated
continuously. Failure to lubricate aluminum in the cut will
cause chips to adhere to the tool, dulling the die and
punch and increasing load on the motor.
Cutouts
Cutouts can be done by first opening a round hole of
about 42 mm (1-5/8") diameter or more in the material.
Cutting stainless steel
1
2
There is more vibration when cutting stainless steel than
mild steel. Less vibration and better cutting is possible by
adding another washer (standard equipment) beneath
the die.
004787
004789
004792
1. Screw
3
2. Hex wrench
3. Washer
4. Insert washer in
between
5. Die
4
5
Use the hex wrench provided to remove the two screws
and insert the washer below the die. Replace screws and
tighten securely.
MAINTENANCE
CAUTION:
• Always be sure that the tool is switched off and
unplugged before attempting to perform inspection
or maintenance.
Punch & die service life
Replace or sharpen punch and die after cutting the
lengths indicated in the accompanying table. Their life, of
course, depends upon the thickness of materials cut and
lubrication conditions.
Punch Replace after 150 m (492 ft.) of 3.2 mm (1/8") steel sheet
Die Sharpen after 300 m (984 ft.) of 3.2 mm (1/8") steel sheet
When cutting is poor even after replacing the punch,
sharpen the die. Grind down the dull edge shown in the
figure using a grinder. After rough-grinding the dull por-
tion, finish with a dressing stone. Stock removal should
be about 0.3 to 0.4 mm (1/64").
When installing ground die, a clearance of 3.5 to 4.0 mm
(1/8" to 5/32") should be obtained by attaching one or two
of the washer provided, as shown in the figure. Failure to
have the proper clearance will result in vibration during
cutting.
1
2
3
5
004793
1. Grind/sharpen;
1
0.3 - 0.4 mm
(1/64")
2
2. Remove dull
portion
004794
1. 3.5 -4.0 mm
(1/8" - 5/32")
2. Die
3. Washer
006440