Makita JR3020, Instruction Manual

Page: 5 / 40

5
ENGLI SH
Explanation of general view
1 Hex wrench 4
2 Pin
3 Bolt
4 Slider
5 Blade clamp
6 Hole
7 Blade
8 Lever
9 Shoe
10 Lever
11 Stopper
12 Lock button/Lock-off button
13 Switch trigger
14 Speed change knob
15 Pointer
16 Limit mark
17 Brush holder cap
18 Screwdriver
SPECIFICATIONS
Model JR3020
Max. cutting capacities
Pipe .................................................................... 90 mm
Wood .................................................................. 90 mm
Length of stroke..................................................... 30 mm
Stroke per minute .............................................. 0 – 2,500
Overall length ...................................................... 463 mm
Net weight............................................................... 3.8 kg
• Due to our continuing programme of research and
development, the specifications herein are subject to
change without notice.
• Note: Specifications may differ from country to country.
Power supply
The tool should be connected only to a power supply of
the same voltage as indicated on the nameplate, and can
only be operated on single-phase AC supply. They are
double-insulated in accordance with European Standard
and can, therefore, also be used from sockets without
earth wire.
Safety hints
For your own safety, please refer to the enclosed Safety
instructions.
ADDITIONAL SAFETY RULES
1. Wear a hard hat (safety helmet), safety glasses
and/or face shield. It is also highly recom-
mended that you wear a dust mask, ear protec-
tors and thickly padded gloves.
2. Check the blade carefully for cracks or damage
before operation. Replace cracked or damaged
blade immediately.
3. Do not attempt to cut workpieces larger than
specified in this manual (especially hollow pipe).
The blade might snap and cause an injury. (Fig. 1)
4. Hold the tool firmly.
5. Be sure no one is below when using the tool in
high locations.
6. Do not point the tool at anyone in the immediate
vicinity.
7. When making a “blind” cut (you can’t see behind
what is being cut), be sure that hidden electrical
wiring or water pipes are not in the path of the
cut. If wires are present, they must be discon-
nected at their power source by a qualified per-
son or avoided to prevent the possibility of lethal
shock or fire. Always hold the tool ONLY by the
insulated gripping surfaces to prevent any elec-
tric shock if you accidentally cut through a “live”
wire. Water pipes in “blind” areas must be
drained and capped before cutting.
8. Be careful not to hit the end of the blade against
something during operation. Damage to the tool
or dangerous blade breakage may occur. (Fig. 2)
9. Watch out for cut-off portions of the workpiece
being cut. They may fall and injure you or some-
one near you.
10. When cutting metals, be cautious of hot flying
chips.
11. Do not touch the blade or the workpiece immedi-
ately after operation; they may be extremely hot
and could burn your skin.
12. If you withdraw the blade from the workpiece
during operation, strong reaction will be pro-
duced, causing the blade to snap or causing you
to lose your grip and control of the tool. Always
switch off the tool and wait until the blade has
come to a complete stop before withdrawing the
blade from the workpiece.
SAVE THESE INSTRUCTIONS.
OPERATING INSTRUCTIONS
Important:
Always be sure that the tool is switched off and
unplugged before installing or removing the saw blade, or
adjusting the shoe.
Installing or removing saw blade (Fig. 3 & 4)
To install the blade, loosen the bolt with the hex wrench 4.
Insert the blade between the leaf spring and the slider so
that the pin on the slider fits into the hole in the blade
shank. Tighten the bolt securely while making sure that the
blade cannot be extracted even though you try to pull it out.
CAUTION:
If you tighten the bolt without the pin on the slider fitting
properly in the hole in the blade shank, the pin or the
blade shank will be damaged. This may cause the blade
to be ejected unexpectedly during operation. This can be
extremely dangerous.
To remove the blade, follow the installation procedures in
reverse.
Adjusting the shoe (Fig. 5)
When the blade loses its cutting efficiency in one place
along its cutting edge, reposition the shoe to utilize a
sharp, unused portion of its cutting edge. This will help to
lengthen the life of the blade. To reposition the shoe,
loosen the lever and slide the shoe forward or back to the
desired position. Then tighten the lever to firmly secure
the shoe.
Changing the cutting action (Fig. 6)
This tool can be operated in an orbital or a straight line
action. See the following chart to help determine the
proper and most efficient applications. To change the cut-
ting action, press the stopper and turn the lever to the
desired cutting action position. Then, release the stopper
to lock the lever.