Operation; Maintenance - Makita JN3201 Instruction Manual

► Fig.4: 1. Punch 2. Screw 3. Wrench
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
operation, the tool may break down.
► Fig.5: 1. Cutting edge 2. Punch 3. Groove 4. Punch
holder 5. Pin

OPERATION

CAUTION:
• Hold the tool firmly with one hand on the main
handle when performing the tool.
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
► Fig.6
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 continu-
ously. 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
► Fig.7
Cutouts can be done by first opening a round hole of
about 42 mm diameter or more in the material.
Cutting stainless steel
► Fig.8: 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 pos-
sible by adding another washer (standard equipment)
beneath the die.
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 inspec-
tion 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 indicated 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 por-
tion, finish with a dressing stone. Stock removal should
be about 0.3 to 0.4 mm.
► Fig.9: 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.
► Fig.10: 1. 3.5 -4.0 mm (1/8" - 5/32") 2. Die
3. Washer
CAUTION:
• Secure installing screws carefully when install-
ing. A loose screw can cause tool breakage
during operation.
NOTE:
• The die can be sharpened two times. After two
sharpenings, it should be replaced with new
one.
Replacing carbon brushes
► Fig.11: 1. Limit mark
Remove and check the carbon brushes regularly.
Replace when they wear down to the limit mark. Keep
the carbon brushes clean and free to slip in the holders.
Both carbon brushes should be replaced at the same
time. Use only identical carbon brushes.
► Fig.12: 1. Screwdriver 2. Brush holder cap
Use a screwdriver to remove the brush holder caps.
Take out the worn carbon brushes, insert the new ones
and secure the brush holder caps.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be per-
formed by Makita Authorized Service Centers, always
using Makita replacement parts.
6 ENGLISH