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BM 160992A0H1 01-14_RH745 RH850VC 1/22/14 10:22 AM Page 9
Operating Instructions
DUAL FUNCTION TRIGGER SWITCH
To turn the tool “ON” in the Drilling/ Hammering mode, squeeze and hold the trigger switch. To turn the tool “OFF”, release the trigger switch, which is spring loaded and will return to the “OFF” position automatically (Fig. 1).
Your tool is also equipped with a
TO LOCK TOOL “ON”: turn the selector dial to the Hammering Only mode and squeeze the trigger switch until it locks.
TO TURN TOOL: “OFF“ press the trigger release switch and the trigger will return to the “OFF” position automatically.
To increase switch life, do not turn switch on and off while tool is under load.
VARIAbLE SPEED DIAL
Your tool is equipped with a variable speed dial (Fig. 1). The impact rate (BPM) and rotating speed (RPM) can be varied according to the type of work being performed by setting the variable speed dial to the selected setting. The chart below will help you to determine which setting to use for your application. However, a
Chipping (Demolition)
Area of application | Control setting |
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|
Plaster work | 1 - 2 |
Removing tiles | 3 |
Brick work | 4 |
Concrete | 5 - 6 |
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|
Drilling Holes | |
|
|
Lower speeds | Higher speeds |
Accurate starts | Faster penetration |
Minimize breakouts |
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when the bit exits |
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the material. |
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|
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"TURbO" FEATURE
In the "Hammer Only" mode power is automatically increased 10% when the tool is turned on to provide maximum chiselling performance.
RH850VC ONLy: ELECTRONIC
FEEDbACK CIRCUITRy (EFC)
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 and rotating speed virtually constant between
RH850VC ONLy: VIbRATION DAMPER
HANDLE / HAMMER MECHANISM
The integrated vibration damper in the main handle and hammer mechanism reduces vibrations (Fig. 1).
SELECTOR LEVER
The selector lever allows the tool to be set for various applications as listed in the following chart, (Fig. 4).
Do not operate the selection ! CAUTION dial until the tool comes to a
complete stop. Shifting during rotation of the chuck can cause damage to the tool.
When using demolition or chipping bits such
as bull points, chisels, spades, gouges, etc. the “Hammer Only” mode must be selected.
SELECTOR LEVER - “VARIO-LOCK”
The