Hitachi DV20VB2 Instruction Manual - Page 13

11. Check the rotational direction (Fig. 7) The bit rotates clockwise (viewed from the rear side) by pushing the R-side of the push button. The L-side of the push button is pushed to turn the bit counterclockwise. (The L and R marks are provided on the body.) L mark CAUTION: Always use the hammer drill with clockwise rotation, when using it as an hammer drill. (Fig. 8) R mark English Push button Switch trigger Fig. 7 HOW TO USE Fig. 8 CAUTION: To prevent accidents, make sure to turn the switch off and disconnect the plug from the receptacle when the drill bits and other various parts are installed or removed. The power switch should also be turned off during a work break and after work. 1. Switch operation ⅜ When the trigger switch is depressed, the tool rotates. When the trigger is released, the tool stops. ⅜ The rotational speed of the drill can be controlled by varying the amount that the Trigger switch is pulled. Speed is low when the trigger switch is pulled slightly and increases as the trigger switch is pulled more. ⅜ The desired rotation speed can be preselected with the speed control dial. Turn the speed control dial clockwise for higher speed and counterclockwise for lower speed. (Fig. 9) Speed control dial Stopper Low speed Switch trigger Fig. 9 High speed 13