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being drilled or chiseling material such aswhich is best suited for your operation. The
plaster or tile.Vario-Lock position is intended for use with
Regardless of the pressure applied on thechipping bits such as bull points, spades,
trigger, the tool will not operate any faster thangouges, etc.
maximum speed setting selected.Turn the selector lever, to the Ovario-lock�
"TURBO" FEATUREsetting. Next, rotate the locking sleeve,
In the "Hammer Only" mode power isalong with the accessory, to the desired
automatically increased 20% when the toolposition. Then turn the selector lever to the
is turned on to provide maximum chisellingOhammer only� setting and slightly turn the
performance.locking sleeve to have it automatically lock
into a definite position.
CONSTANT RESPONSE CIRCUITRY
The internal electronic feedback systemSLIP CLUTCH
provides a "soft start", which will reduce theThe tool has a internal pre-set slip clutch.
stresses that occur from a high torque start.The output spindle will stop rotating if the
The system also helps to keep the pre-accessory binds and overloads the tool.
selected impact rate and rotating speedAUXILIARY HANDLE
virtually constant between no-load and loadThe tool must be supported with the
conditions.auxiliary handle, which can be swiveled 360u.
SELECTOR LEVERTo reposition and/or swivel the handle,
The selector lever allows the tool to be setloosen the hand grip, move the handle to the
for various applications as listed in thedesired position along the barrel and
following chart, (Fig. 4).securely retighten the hand grip.
When using demolition or chipping bits suchPOWER INDICATOR LIGHT
as bull points, chisels, spades, gouges, etc.When you plug your tool into the power
the OHammer Only� mode must be selected.source, the power indicator light will go
OON� indicating the tool is receiving power.
SELECTOR LEVER - OVARIO-LOCK�
The vario-lock can be set in any one of twelve
positions (30u increments). Choose a position
FIG. 4
Drilling/Hammering: Vario-Lock:Hammering Only:
used for drilling with solidallows chisel to be set inused for chipping
carbide bits and core bitsone of 12 positionsand demolition work
(right or left O0� position)
"TOOL TIPS"realized. This period may require up to 5
For the best penetration rates in concrete,hours of operation.
run the tool with a steady pressure, but doA combination hammer is likely to be the
not use excessive force as this will decreasemost expensive portable tool at the
the efficiency of the tool.construction job. The long wear and efficient
All hammers require a short period of time tooperation of the BOSCH hammers will more
warm up. Depending on the roomthan justify the cost for tools of this type. As
temperature, this time may vary fromearlier pointed out, sharp accessories as well
approximately 15 seconds (90uF) to 2as clean air vents are necessary for efficient
minutes (32uF). A new hammer requires aoperation. Establish and follow a set
break-in period before full performance ismaintenance program.
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ACEC
