Bosch Power Tools DH1020VC manual Operating Instructions, Tool Tips, Rocker ON/OFF Switch

BM 1609929X76 07-12_1609929X76 07-12.qxp 8/1/12 8:00 AM Page 9

Operating Instructions

ROCKER “ON/OFF” SWITCH

TO TURN THE TOOL "ON" depress the dust-protected switch to the number “I” position.

TO TURN THE TOOL "OFF": depress switch to the number “0” position (Fig. 1).

For low temperatures, the machine reaches the full impact rate only after a certain time.

This start-up time can be shortened by striking the chisel in the tool against the floor one time.

	"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. 6).
	FIG. 6
FIG. 4	VARIO-LOCK
	SELECTOR RING

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. 7).

FIG. 7

VIBRATION DAMPER HANDLE /

HAMMER MECHANISM

VARIABLE SPEED DIAL

SERVICE REMINDER

LIGHT

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.

VIbRATION DAMPER HANDLE /

HAMMER MECHANISM

The integrated vibration damper in the main handle and hammer mechanism reduces vibrations (Fig. 7).

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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