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shaft. The end thread should be smeared with grease firstly, after tightening the drill bit, let
it idly run, do make sure that its radial motion is corresponded with the general requirement,
then you can operate the drill.
4. There are should some water in the water switch of drill.
5. Material:
When drilling on the reinforced concrete, if the drill bit touched the reinforcing steel bar, the
current will be increased suddenly, the motor vibrated and the drill overloaded, at this time,
the drill thrust should be reduced properly, the lower current can have a bad effect on the
drill speed and the drill bit. If the grit, gravel falls into the drill or the drill touches the
reinforcing steel bar, the drill will be caught, the higher excess current happened, and the
clutch skidded, here, please shut off the tool, remove the drill bit and clean the clips in the
gap, please wait for about 3 minutes, let the drill cool down before restarting the switch to
continue drilling, when drilling the wood, thick blacktop and asphalt felt etc, its current will
be increased, so please drill slowly, uniformly and slightly. If the clutch skidded continuously,
please stop the drill and retighten the clutch.
6. Remove drill core:
When the drill bit almost drills through the floorboard or wall etc materials, be careful in
reducing its drill speed to avoid drilling forcibly. When drilling again, please shut off the tool,
remove the drill bit and clean its wall with water, after cleaning the chip, beat the drill slightly
with the wood stick, be careful in removing the drill core and damaging the drill bit, then
installing the drilling to continue operating.
7. Keep the motor ventilate and cool down:
During operating the ventilated notch of motor should not be clogged with dirt to avoid the
higher temperature affecting the life of motor or burning down the winding.
8. Waterless operation forbidden:
When operation, there should be plenty of water flow onto the surface of the drill bit to cool
down, and the mud can be washed out to avoid damaging the drill bit and sealing washer.
9. Avoid dampening the motor:
Do keep the enclosure of the motor away from the water to avoid reducing its insulating
performance or leaking electricity. Only use the machine with the direction of vertical
downward!
10. Drill vibrated
When drilling sometimes, the gap between the elevating body and square pipe and rack
increased may cause the drill vibrated, at this time, please shut off the tool and adjust the
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