Cutting Method; Maintenance - Makita JN3201 Instruction Manual

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 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 diameter or more in the material.
Cutting stainless steel
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► 1. Screw 2. Hex wrench 3. Washer 4. Insert washer
in between 5. Die
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.
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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.
• Never use gasoline, benzine, thinner, alcohol or the
like. Discoloration, deformation or cracks may result.
The tool and its air vents have to be kept clean.
Regularly clean the tool's air vents or whenever the
vents start to become obstructed.
Punch & die service life
Replace or sharpen punch and die after cutting the lengths indi-
cated in the accompanying table. Their life, of course, depends
upon the thickness of materials cut and lubrication conditions.
Punch Replace after 150 m of 3.2 mm steel sheet
Die Sharpen after 300 m of 3.2 mm 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 portion, finish with a
dressing stone. Stock removal should be about 0.3 to 0.4 mm.
► 1. Grind/sharpen; 0.3 - 0.4 mm (1/64") 2. Remove
dull portion
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 the figure. Failure to have the
proper clearance will result in vibration during cutting.
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► 1. 3.5 -4.0 mm (1/8" - 5/32") 2. Die 3. Washer
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