Bosch Power Tools DDH181X-01 Operating Instructions, Variable Speed Controlled Trigger Switch

! WARNING

BM 2610032842 04-14_DDH181X HDH181X 4/9/14 7:10 AM Page 10

Operating Instructions

VARIABLE SPEED CONTROLLED

TRIGGER SWITCH

Your tool is equipped with a variable speed trigger switch. The tool can be turned "ON" or "OFF" by squeezing or releasing the trigger. The speed can be adjusted from the minimum to maximum nameplate RPM by the pressure you apply to the trigger. Apply more pressure to increase the speed and release pressure to decrease speed (Fig. 1).

FORWARD/REVERSING

LEVER & TRIGGER LOCK

After tool use, lock trigger in “OFF” position to help prevent

accidental starts and accidental discharge.

Your tool is equipped with a forward/ reversing lever and trigger lock located above the trigger (Fig. 7). This lever was designed for changing rotation of the bit, and for locking the trigger in an “OFF” position.

For forward rotation, (with chuck pointed away from you) move the lever to the far left (Fig. 7).

For reverse rotation move the lever to the far right (Fig. 8). To activate trigger lock move lever to the center off position.

!	CAUTION	Do not change direction of
		rotation until the tool

comes to a complete stop. Shifting during rotation of the chuck can cause damage to the tool.

FIG. 7

FIG. 8

ACTIVE RESPONSE TECHNOLOGy™

Active Response Technology™ is a feature that detects rapid twisting of the drill handle and quickly cuts power to the motor in order to limit the movement of the handle. You are most likely to encounter this condition when the drilling bit binds in the material or a fastener binds or bottoms-out to a hard stop in the material.

In the event a binding condition occurs, an internal sensor will detect the rapid handle rotation and quickly cut-off power to the motor, even while the variable speed trigger switch is still depressed. The work light on the foot of the tool will then flash to indicate the system has been engaged. The light will continue to flash until the tool’s trigger switch is released. Note that the feature can only function if the drill handle has freedom to rotate. If you are working in a confined space, the handle may not have the ability to rotate such that the feature can activate.

To free a bound bit, release the trigger and reposition the handle to a comfortable working

position. Change your forward/reversing lever to reverse. Hold on tightly, with a stable body position to the drill’s main and auxiliary handles. Slowly pull the trigger to release the bit from the work piece. Once the bit is freed, you can reestablish the drilling/driving operation and continue work.

The Active Response

!WARNING Technology™ feature is not intended to replace any safety feature or any warnings or operating instructions in this manual. To reduce the risk of injury when using the tool, follow all operating and safety practices listed in this manual.

If the Active Response

!WARNING Technology™ feature engages and you fail to reposition the handle and unbind the bit, the handle will continue to rotate when you reengage the trigger and you may lose control. To reduce the risk of injury when using the tool, follow the operating instructions for releasing a bound bit and returning to normal operation.

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