BM 1619929219 2/03 2/12/03 8:21 AM Page 7
Operating Instructions
TRIGGER "ON-OFF" SWITCH
To turn the tool “ON” squeeze the trigger switch. To turn the tool “OFF”, release the trigger switch, which is spring loaded and 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. 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 | |
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Lower speeds | Higher speeds |
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Larger holes | Smaller holes |
Accurate starts | Faster penetration |
Minimize breakouts |
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when the bit exits |
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the material. |
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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
INSTALLING ACCESSORIES
Clean the insert shank end of the accessory to remove any debris, then lightly grease with a light oil or lubricant.
Insert accessory into the tool holder through the dust shield, while twisting and pushing inward until it locks automatically into place. Pull outward on the acessory to be certain it is locked into the tool holder (fig. 2).
NOTE: You may notice some “wobble” or “run out” of the bit when run in a no load condition. This is due to the quick change SDS tool holder assembly. However, once the bit has a load placed upon it, the bit automatically centers itself to produce an accurate hole.
NOTE: The high efficiency available from the rotary hammers can only be obtained if sharp and undamaged accessories are used. The "cost" to maintain sharp and undamaged accessories is more than offset by the "time saved" in operating the tool with sharp accessories.
REMOVING ACCESSORIES
!WARNING Accessories may be hot after use. Avoid contact
with skin and use proper protective gloves or cloth to remove.
To remove an accessory, pull and hold locking sleeve backward and pull bit forward. All accessories should be wiped clean after removing.
FIG. 2
LOCKING SLEEVE