Functional Description - Makita 4157KB Instruction Manual

eliminate the cause of wheel binding.
h) Do not restart the cutting operation in the
workpiece. Let the wheel reach full speed and
carefully re-enter the cut. The wheel may bind,
walk up or kickback if the power tool is restarted in
the workpiece.
i) Support panels or any oversized workpiece
to minimize the risk of wheel pinching and
kickback. Large workpieces tend to sag under
their own weight. Supports must be placed under
the workpiece near the line of cut and near the
edge of the workpiece on both sides of the wheel.
j) Use extra caution when making a "pocket
cut" into existing walls or other blind areas.
The protruding wheel may cut gas or water pipes,
electrical wiring or objects that can cause kickback.
18. Before using a segmented diamond wheel,
make sure that the diamond wheel has the
peripheral gap between segments of 10 mm or
less, only with a negative rake angle.
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.
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.
Adjusting the depth of cut
Fig.1
Loosen the lever on the depth guide and move the base
up or down. At the desired depth of cut, secure the base
by tightening the lever.
CAUTION:
After adjusting the depth of cut, always tighten the
•
lever securely.
Bevel cutting
Fig.2
Loosen the knob on the bevel scale plate on the front of
the base. Set for the desired angle (0° - 45°) by tilting
accordingly, then tighten the knob securely.
Adjusting for accuracy of 90° cut (vertical
cut)
Fig.3
Fig.4
This adjustment has been made at the factory. But if it is
off, adjust the adjusting screw with a hex wrench while
squaring the blade with the base using a triangular rule,
try square, etc.
Sighting
Fig.5
For straight cuts, align the right edge of the notch in the
front of the base with your cutting line on the workpiece.
For 45° bevel cuts, align the left edge of the notch in the
front of the base with it.
Switch action
CAUTION:
Before plugging in the tool, always check to see
•
that the switch trigger actuates properly and
returns to the "OFF" position when released.
Fig.6
To prevent the switch trigger from being accidentally
pulled, a lock-off button is provided.
To start the tool, push in the lock-off button and pull the
switch trigger. Release the switch trigger to stop.
6