Functional Description - Makita SG1251 Instruction Manual

Additional Safety Warnings:
19. Never attempt to cut with the tool held upside
down in a vise. This can lead to serious
accidents, because it is extremely dangerous.
20. Some material contains chemicals which may be
toxic. Take caution to prevent dust inhalation
and skin contact. Follow material supplier safety
data.
21. Store wheels
recommendations.
damage the wheels.
SAVE THESE INSTRUCTIONS.
WARNING:
DO NOT let comfort or familiarity with product
(gained from repeated use) replace strict adherence
to safety rules for the subject product. MISUSE or
failure to follow the safety rules stated in this
instruction manual may cause serious personal
injury.

FUNCTIONAL DESCRIPTION

CAUTION:
• Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the
tool.
Shaft lock (Fig. 1)
CAUTION:
• Never actuate the shaft lock when the spindle is
moving. The tool may be damaged.
Press the shaft lock to prevent spindle rotation when
installing or removing accessories.
Sighting (Fig. 2)
There are notches on the front and rear of the base. This
is helpful for an operator to follow a straight cutting line.
Adjusting the grooving depth (Fig. 3)
The grooving depth can be adjusted between 0 mm and
30 mm.
Loosen the clamping screw and adjust the pointer to your
desired depth graduation on the scale.
Then tighten the clamping screw firmly.
Switch action (Fig. 4)
CAUTION:
• Before plugging in the tool, always check to see that
the switch trigger actuates properly and returns to the
"OFF" position when released.
For tool with lock button
CAUTION:
• Switch can be locked in "ON" position for ease of
operator comfort during extended use. Apply caution
when locking tool in "ON" position and maintain firm
grasp on tool.
To start the tool, simply pull the switch trigger. Release
the switch trigger to stop.
For continuous operation, pull the switch trigger, push in
the lock button and then release the switch trigger.
To stop the tool from the locked position, pull the switch
trigger fully, then release it.
8
as per manufacturer
Improper storage
For tool with lock-off button
CAUTION:
• Do not pull the switch trigger hard without pressing in
the lock-off button. This can cause switch breakage.
To prevent the switch trigger from being accidentally
pulled, a lock-off button is provided.
To start the tool, depress the lock-off button and pull the
switch trigger. Release the switch trigger to stop.
may
For tool without lock button / lock-off button
To start the tool, simply pull the switch trigger. Release
the switch trigger to stop.
Electronic function
The tools equipped with electronic function are easy to
operate because of the following features.
Constant speed control
Electronic speed control for obtaining constant speed.
Possible to get fine finish, because the rotating speed is
kept constant even under load condition.
Soft start
Soft-start feature minimizes start-up shock, and makes
the tool start smoothly.
Overload protector
When the tool would be employed over the admissible
load, it will stop automatically to protect the motor and
wheel. When the load will come to the admissible level
again, the tool can be started automatically.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.
Removing the diamond wheels (Fig. 5, 6 & 7)
Loosen and remove the bolt with the hex wrench.
Open the blade case while holding the tool base.
NOTE:
• The tool base will open at a stroke by the spring force.
Rotate the diamond wheels while pressing the shaft lock
until it engages.
Remove the lock nut by rotating it counterclockwise with
the lock nut wrench.
Remove the diamond wheels and space rings.
Adjusting the groove width (the distance between
the two diamond wheels)
Adjust the grooving width by changing the number of the
space rings as shown in the table. (Fig. 8)
Installing the diamond wheels (Fig. 9 & 10)
Mount the diamond wheel carefully onto the spindle.
Align the directions of the arrow on the diamond wheel
and the tool. Install space rings, the other diamond wheel
and the lock nut.
Tighten the lock nut securely clockwise with the lock nut
wrench while pressing the shaft lock.
Return the blade case and tool base to the original
position and tighten the bolt to secure them.
Adjusting the front handle angle (Fig. 11)
Loosen the two bolts on both sides of the front handle
with the hex wrench. Move the front handle to your
desired angle and tighten the two bolts firmly.