Troubleshooting Tip - DeWalt DW970 Manual De Instrucciones

larger the fastener which can be driven. To select any of the
numbers, rotate until the desired number aligns with the selector,
shown in Figure 5.
Dual Range Gearing
The dual range feature of your driver allows you to shift gears for
greater versatility.
To select the low speed, high torque setting, turn the tool off and
permit the unit to stop. Slide the gear shifter forward (towards the
chuck - position 1), as shown in Figure 5.
To select the high speed, low torque setting, turn the tool off and
permit the unit to stop. Slide the gear shifter back (away from
chuck - position 2).
NOTE: Do not change gears when the tool is running.

Troubleshooting Tip!

If you are having trouble changing gears, make sure that the dual
range gear shifter is either completely pushed forward or
completely pushed back.
Quick Release Chuck
NOTE: The chuck accepts 1/4" (6mm) hex accessories only.
To install an accessory, pull the chuck collar toward the front of the
tool, insert the accessory, and release the collar. The accessory
will lock in place.
To remove an accessory, pull the chuck collar toward the front of
the tool. Remove the accessory and release the chuck.
Operation as a Drill
Turn the collar to the drill bit symbol. Install the desired drill bit in the
chuck. Select the desired speed/torque range using the dual range
gear shifter to match the speed and torque to the planned opera-
tion.
Follow these instructions for best results when drilling.
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Drilling
1. Use sharp drill bits only. For WOOD, use twist drill bits, spade
bits, power auger bits, or hole saws. For METAL, use high
speed steel twist drill bits or hole saws. For MASONRY, such
as brick, cement, cinder block, etc., use carbide-tipped bits.
2. Be sure the material to be drilled is anchored or clamped firmly.
If drilling thin material, use a "back-up" block to prevent damage
to the material.
3. Always apply pressure in a straight line with the bit. Use
enough pressure to keep the drill bit biting, but do not push
hard enough to stall the motor or deflect the bit.
4. Hold tool firmly to control the twisting action of the drill.
5. IF DRILL STALLS, it is usually because it is being overloaded.
RELEASE TRIGGER IMMEDIATELY, remove drill bit from
work, and determine cause of stalling. DO NOT CLICK
TRIGGER OFF AND ON IN AN ATTEMPT TO START A
STALLED DRILL – THIS CAN DAMAGE THE DRILL.
6. To minimize stalling on breaking through the material, reduce
pressure on drill and ease the bit through the last fractional part
of the hole.
7. Keep the motor running when pulling the bit back out of a drilled
hole. This will help prevent jamming.
8. With variable speed drills it is possible to start a hole without
center punching. Use a slow speed to start the hole and
accelerate by squeezing the trigger harder when the hole is
deep enough to drill without the bit skipping out. Operate at full
on after starting the bit.
Drilling in Wood
Holes in wood can be made with the same twist drills used for
metal. These bits may overheat unless pulled out frequently to
clear chips from the flutes. For larger holes, use low speed wood
bits. Work that is likely to splinter should be backed up with a block
of wood.
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