Makita 4112H Instruction Manual page 5

f) Do not "jam" the wheel or apply excessive
pressure. Do not attempt to make an excessive
depth of cut. Overstressing the wheel increases
the loading and susceptibility to twisting or binding
of the wheel in the cut and the possibility of
kickback or wheel breakage.
g) When wheel is binding or when interrupting
a cut for any reason, switch off the power tool
and hold the power tool motionless until the
wheel comes to a complete stop. Never
attempt to remove the wheel from the cut while
the wheel is in motion otherwise kickback may
occur. Investigate and take corrective action to
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.
19. 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:
20. Use only flat cutting-off (Type 41) bonded
abrasive wheels.
21. Be careful not to damage the spindle, the
flange (especially the installing surface) or the
lock nut. Damage to these parts could result
in wheel breakage.
22. Make sure the wheel is not contacting the
workpiece before the switch is turned on.
23. Before using the tool on an actual workpiece,
let it run for a while. Watch for vibration or
wobbling that could indicate poor installation
or a poorly balanced wheel.
24. Watch out for flying sparks. Hold the tool so
that sparks fly away from you and other
persons or flammable materials.
25. Do not leave the tool running. Operate the tool
only when hand-held.
26. Do not touch the workpiece immediately after
operation; it may be extremely hot and could
burn your skin.
27. Always be sure that the tool is switched off and
unplugged or that the battery cartridge is
removed before carrying out any work on the tool.
28. Observe the instructions of the manufacturer
for correct mounting and use of wheels.
Handle and store wheels with care.
29. Do not use separate reducing bushings or
adaptors to adapt large hole abrasive wheels.
30. Use only flanges specified for this tool.
31. Check that
supported.
32. Pay attention that the wheel continues to
rotate after the tool is switched off.
33. If working place is extremely hot and humid,
or badly polluted by conductive dust, use a
short-circuit breaker (30 mA) to assure
operator safety.
34. Do not use the tool on any materials
containing asbestos.
35. Do not use water or grinding lubricant.
36. Ensure that ventilation openings are kept
clear when working in dusty conditions. If it
should become necessary to clear dust, first
disconnect the tool from the mains supply
( use non metallic objects ) and avoid
damaging internal parts.
37. Cutting discs must not be subjected to any
lateral pressure.
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.
Symbols
The followings show the symbols used for tool.
･
volts
･
amperes
･
alternating or direct current
･
rated speed
･
no load speed
･
Class II Construction
･
revolutions or reciprocation per minute
5
the workpiece is properly
USD291-3