Bosch Power Tools 11321EVS manual Tool Tips

BM 2610954508 08-07 8/6/07 4:25 PM Page 8

AUTO-MAX ™

The patented Bosch Auto-Max system insures that each time your tool is plugged in and receiving power, it will operate at maximum speed and impact force.

!WARNING When the power cord is unplugged from the mains

outlet or when branch-circuit power is interrupted, the electronic controller will automatically reset the tool to maximum speed and impact force. Unexpected starting at maximum operating speed and impact force could startle the operator and lead to potential injury.

"VARIO-LOCK"- SELECTOR RING

The vario-lock selector ring can be set in any one of twelve (30˚ increments) positions. Choose a position which is best suited for your operation. To adjust, pull the selector ring forward and hold firmly, then turn both the accessory and the selector ring to the desired position. Release the selector ring and turn the accessory slightly until it locks in place (Fig. 7).

VARIABLE SPEED DIAL

Your tool is equipped with a variable speed dial. The speed and impact force can be adjusted by rotating the dial. Higher speeds and impact force work best for faster penetration when chiseling in hard masonry material. Slower speeds work best for chiseling material such as plaster or tile (Fig. 8).

CONSTANT RESPONSE CIRCUITRY

The internal electronic feedback system provides a "soft start", which will reduce the stresses that occur from a high torque start. The system also helps to keep the pre- selected impact rate virtually constant between no-load and load conditions.

POWER INDICATOR LIGHT

FIG. 7

VARIO-LOCK

SELECTOR RING

When you plug your tool into the power source, the power indicator light will go “ON” indicating the tool is receiving power (Fig. 8).

VIBRATION DAMPER HANDLE /

HAMMER MECHANISM

The integrated vibration damper in the main handle and hammer mechanism reduces vibrations (Fig. 8).

FIG. 8	VIBRATION DAMPER
	HANDLE / HAMMER
	MECHANISM

VARIABLE

SPEED DIAL

SERVICE REMINDER

LIGHT

POWER INDICATOR

LIGHT

Tool Tips

For the best penetration rates in concrete, run the tool with a steady pressure, but do not use excessive force as this will decrease the efficiency of the tool.

All hammers require a short period of time to warm up. Depending on the room temperature, this time may vary from approximately 15 seconds (90˚F) to 2 minutes (32˚F). A new hammer requires a break-in period before full performance is realized. This period may require up to 5 hours of operation.

An electric hammer is likely to be the most expensive portable tool at the construction job. The long wear and efficient operation of the BOSCH hammers will more than justify the cost for tools of this type. As earlier pointed out, sharp accessories as well as clean air vents are necessary for efficient operation. Establish and follow a set maintenance program.

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