Makita STRAIGHT SHEAR JS1660 User manual

INSTRUCTION MANUAL
WARNING:
For your personal safety, READ and UNDERSTAND before using.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.
ENGLISH
Straight Shear
MODEL JS1660
MODEL JS1670
004666
DOUBLE
INSULATION

2
SPECIFICATIONS
• 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.
SYMBOLS END201-2
The following show the symbols used for the equipment.
Be sure that you understand their meaning before use.
...................Read instruction manual.
...................DOUBLE INSULATION
..................Only for EU countries
Do not dispose of electric equipment
together with household waste
material!
In observance of European Directive
2002/96/EC on waste electric and
electronic equipment and its
implementation in accordance with
national law, electric equipment that
have reached the end of their life
must be collected separately and
returned to an environmentally
compatible recycling facility.
Intended use
The tool is intended for cutting sheet steel and stainless
sheet steel.
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.
For Model JS1660
For European countries only
Noise and Vibration
The typical A-weighted sound pressure level is 85 dB (A).
Uncertainty is 3 dB(A).
The noise level under working may exceed 85 dB (A).
– Wear ear protection. –
The typical weighted root mean square acceleration
value is not more than 2.5 m/s2.
These values have been obtained according to
EN60745.
For Model JS1670
For European countries only
Noise and Vibration
The typical A-weighted sound pressure level is 84 dB (A).
Uncertainty is 3 dB(A).
The noise level under working may exceed 85 dB (A).
– Wear ear protection. –
The typical weighted root mean square acceleration
value is not more than 2.5 m/s2.
These values have been obtained according to
EN60745.
Model JS1660 JS1670
Max. cutting capacities
Steel up to 400 N/mm21.6 mm (16 ga.) 1.0 mm (20 ga.)
Steel up to 600 N/mm21.2 mm (18 ga.) 0.7 mm (23 ga.)
Steel up to 800 N/mm20.8 mm (22 ga.) 0.5 mm (26 ga.)
Aluminum up to 200 N/mm22.5 mm (13 ga.) 2.5 mm (13 ga.)
Min. cutting radius --- 30 mm
Strokes per minute (min-1)4,500 4,500
Overall length 304 mm 306 mm
Net weight 1.3 kg 1.3 kg
Safety class /II /II

3
EC-DECLARATION OF CONFORMITY
We declare under our sole responsibility that this product
is in compliance with the following standards of stand-
ardized documents, EN60745, EN55014, EN61000 in
accordance with Council Directives, 89/336/EEC, 98/37/
EC.
Yasuhiko Kanzaki CE 2005
Director
MAKITA INTERNATIONAL EUROPE LTD.
Michigan Drive, Tongwell, Milton Keynes, Bucks MK15
8JD, ENGLAND
Responsible manufacturer:
Makita Corporation Anjo Aichi Japan
GENERAL SAFETY RULES GEA001-3
WARNING:
Read all instructions. Failure to follow all instructions listed below may result in
electric shock, fire and/or serious injury. The term “power tool” in all of the
warnings listed below refers to your mains-operated (corded) power tool or battery-
operated (cordless) power tool.
SAVE THESE INSTRUCTIONS
Work area safety
1. Keep work area clean and well lit. Cluttered and
dark areas invite accidents.
2. Do not operate power tools in explosive atmos-
pheres, such as in the presence of flammable
liquids, gases or dust. Power tools create sparks
which may ignite the dust or fumes.
3. Keep children and bystanders away while oper-
ating a power tool. Distractions can cause you to
lose control.
Electrical safety
4. Power tool plugs must match the outlet. Never
modify the plug in any way. Do not use any
adapter plugs with earthed (grounded) power
tools. Unmodified plugs and matching outlets will
reduce risk of electric shock.
5. Avoid body contact with earthed or grounded
surfaces such as pipes, radiators, ranges and
refrigerators. There is an increased risk of electric
shock if your body is earthed or grounded.
6. Do not expose power tools to rain or wet condi-
tions. Water entering a power tool will increase the
risk of electric shock.
7. Do not abuse the cord. Never use the cord for
carrying, pulling or unplugging the power tool.
Keep cord away from heat, oil, sharp edges or
moving parts. Damaged or entangled cords
increase the risk of electric shock.
8. When operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use of a
cord suitable for outdoor use reduces the risk of
electric shock.
Personal safety
9. Stay alert, watch what you are doing and use
common sense when operating a power tool. Do
not use a power tool while you are tired or under
the influence of drugs, alcohol or medication. A
moment of inattention while operating power tools
may result in serious personal injury.
10. Use safety equipment. Always wear eye protec-
tion. Safety equipment such as dust mask, non-skid
safety shoes, hard hat, or hearing protection used
for appropriate conditions will reduce personal inju-
ries.
11. Avoid accidental starting. Ensure the switch is
in the off-position before plugging in. Carrying
power tools with your finger on the switch or plug-
ging in power tools that have the switch on invites
accidents.
12. Remove any adjusting key or wrench before
turning the power tool on. A wrench or a key left
attached to a rotating part of the power tool may
result in personal injury.

4
13. Do not overreach. Keep proper footing and bal-
ance at all times. This enables better control of the
power tool in unexpected situations.
14. Dress properly. Do not wear loose clothing or
jewellery. Keep your hair, clothing, and gloves
away from moving parts. Loose clothes, jewellery
or long hair can be caught in moving parts.
15. If devices are provided for the connection of
dust extraction and collection facilities, ensure
these are connected and properly used. Use of
these devices can reduce dust-related hazards.
Power tool use and care
16. Do not force the power tool. Use the correct
power tool for your application. The correct
power tool will do the job better and safer at the rate
for which it was designed.
17. Do not use the power tool if the switch does not
turn it on and off. Any power tool that cannot be
controlled with the switch is dangerous and must be
repaired.
18. Disconnect the plug from the power source and/
or the battery pack from the power tool before
making any adjustments, changing accessories,
or storing power tools. Such preventive safety
measures reduce the risk of starting the power tool
accidentally.
19. Store idle power tools out of the reach of chil-
dren and do not allow persons unfamiliar with
the power tool or these instructions to operate
the power tool. Power tools are dangerous in the
hands of untrained users.
20. Maintain power tools. Check for misalignment or
binding of moving parts, breakage of parts and
any other condition that may affect the power
tools operation. If damaged, have the power tool
repaired before use. Many accidents are caused
by poorly maintained power tools.
21. Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.
22. Use the power tool, accessories and tool bits
etc. in accordance with these instructions and in
the manner intended for the particular type of
power tool, taking into account the working con-
ditions and the work to be performed. Use of the
power tool for operations different from those
intended could result in a hazardous situation.
Service
23. Have your power tool serviced by a qualified
repair person using only identical replacement
parts. This will ensure that the safety of the power
tool is maintained.
24. Follow instruction for lubricating and changing
accessories.
25. Keep handles dry, clean and free from oil and
grease.
ADDITIONAL SAFETY RULES FOR TOOL ENB011-2
1. Hold the tool firmly.
2. Secure the workpiece firmly.
3. Keep hands away from moving parts.
4. Edges and chips of the workpiece are sharp.
Wear gloves. It is also recommended that you
put on thickly bottomed shoes to prevent injury.
5. Do not put the tool on the chips of the work-
piece. Otherwise it can cause damage and trou-
ble on the tool.
6. Do not leave the tool running. Operate the tool
only when hand-held.
7. Always be sure you have a firm footing. Be sure
no one is below when using the tool in high
locations.
8. Do not touch the blade or the workpiece immedi-
ately after operation; they may be extremely hot
and could burn your skin.
9. Avoid cutting electrical wires. It can cause seri-
ous accident by electric shock.
SAVE THESE INSTRUCTIONS

5
FUNCTIONAL
DESCRIPTION CAUTION:
• Always be sure that the tool is switched off and unplugged before
adjusting or checking function on the tool.
Switch action
CAUTION:
• Before plugging in the tool, always check to see that the slide switch
actuates properly and returns to the “OFF” position when the rear of the
slide switch is depressed.
To start the tool, slide the slide switch toward the “I (ON)” position. For contin-
uous operation, press the front of the slide switch to lock it.
To stop the tool, press the rear of the slide switch, then slide it toward the
“O (OFF)” position.
ASSEMBLY CAUTION:
• Always be sure that the tool is switched off and unplugged before
carrying out any work on the tool.
Adjusting the blade clearance
For JS1660 Only
Adjust the clearance between the side blade and the center blade according to
the thickness of the workpiece.
First use a screwdriver to loosen the screw.
Then use the hex wrench to adjust the clearance by tightening or loosening
the bolt. There may be a slight difference between clearances (A) and (B).
Check the smaller clearance with the thickness gauge and adjust it.
When using the thickness gauge to adjust the blade clearance, refer to the
table.
After adjusting the clearance, tighten the screw securely.
1. Slide switch
1
004669
1. Screw
2. Screwdriver
1. Center blade
2. Bolt
3. Hex wrench
4. Side blade
1
2
004692
1
2
3
4
AB
004693
006428
Workpiece thickness (mm) Marking on thickness gauge
Less than 0.8 0.5
0.8 - 1.3 1.0
More than 1.3 1.5

6
OPERATION
Lubrication
Before operation, lubricate the contact point of the center blade and the pin.
To keep good cutting performance, also use a cutting lubricant from time to
time during operation.
OPERATION
Turn the tool on and set front ends of the side blades on the workpiece. Now
simply move the tool forward, keeping the side blades flush with the workpiece
surface.
CAUTION:
•When cutting a small portion of the workpiece, you may have difficulty
completing the end of the cut. In that case, try to cut it again, pulling the
workpiece back slightly.
MAINTENANCE CAUTION:
•Always be sure that the tool is switched off and unplugged before
attempting to perform inspection or maintenance.
Replacing blades
The service life of the blades varies in terms of the workpiece to be cut. The
following reference tables indicate the approximate service life of the blades.
When the blades become dull, ask Makita Authorized Service Centers to
replace the blades.
For JS1660
1. Pin
1
004694
004695
004696
006433
Max. cutting capacities mm ga
Steel up to 400 N/mm21.6 16
Steel up to 600 N/mm21.2 18
Steel up to 800 N/mm20.8 22
Aluminum up to 200 N/mm22.5 13

7
For JS1670
Replacing carbon brushes
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.
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 mainte-
nance or adjustment should be performed by Makita Authorized Service Cent-
ers, always using Makita replacement parts.
ACCESSORIES
CAUTION:
•These accessories or attachments are recommended for use with your Makita tool specified in this manual. The
use of any other accessories or attachments might present a risk of injury to persons. Only use accessory or
attachment for its stated purpose.
If you need any assistance for more details regarding these accessories, ask your local Makita service center.
006434
Max. cutting capacities mm ga
Steel up to 400 N/mm21.0 20
Steel up to 600 N/mm20.7 23
Steel up to 800 N/mm20.5 26
Aluminum up to 200 N/mm22.5 13
1. Limit mark
1
001145
1. Screwdriver
2. Brush holder cap
1
2
004706
•Hex wrench •Wrench holder

Makita Corporation Anjo, Aichi, Japan
883605B225