Bosch 11245EVS Operating Instructions - Page 7

BM 1619929472 2/03 2/12/03 2:45 PM 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 pre-test will determine the best speed setting, as the chart is intended only as a guide. Once the proper setting is determined the impact rate and rotating speed is kept constant by means of the "Electronic Feedback Circuitry". The variable speed dial can be adjusted while the motor is running with the tool free from work, allowing the operator to adjust the impact rate and rotating speed according to the actual application. Chipping (Demolition) Area of application Control setting stresses that occur from a high torque start. The system also helps to keep the preselected impact rate and rotating speed virtually constant between no-load and load conditions. 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 accessory to be certain it is locked into the tool holder (fig. 2). 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. Plaster work Removing tiles Brick work Concrete 1 - 2 3 4 5 - 6 FIG. 2 Drilling Holes Lower speeds Higher speeds Accurate starts Minimize breakouts when the bit exits the material. Faster penetration ELECTRONIC FEEDBACK CIRCUITRY (EFC) The internal electronic feedback system provides a "soft start", which will reduce the -7- LOCKING SLEEVE