Hitachi DH40MRY Instruction Manual - Page 11
How To Use The Core Bit
UPC - 717709012141
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English (b) A drill can snap sometimes when drilling is almost finished. It is important to relax your thrusting pressure when drilling is nearing the end. Center pin Guide plate HOW TO USE THE CORE BIT When boring penetrating large hole use the core bit. At that time use with the center pin and the core bit shank provided as optional accessories. 1. Mounting CAUTION: Be sure to turn power OFF and disconnect the plug from the receptacle. (1) Mount the core bit to the core bit shank. (Fig. 15) Lubricate the thread of the core bit shank to facilitate disassembly. Core bit Core bit shank Core bit Core bit tip Fig. 17 2. How to bore (Fig. 18) (1) Connect the plug to the receptacle. (2) A spring is installed in the center pin. Push it lightly to the wall or the floor straight. Connect all over the surface of the core bit tip and start operating. (3) When boring about 3/16" (5 mm) in depth the position of the hole will establish. Bore after that removing the center pin and the guide plate from core bit. (4) Application of excessive force will not only expedite the work, but will deteriorate the tip edge of the drill bit, resulting in reduced service life of the rotary hammer. Fig. 15 (2) Mount the core bit shank to the Rotary Hammer. (Fig. 16) Fig. 18 CAUTION: When removing the center pin and the guide plate, turn OFF the switch and disconnect the plug from the receptacle. 3. Dismounting (Fig. 19) Remove the core bit shank from the rotary hammer and strike the head of the core bit shank strongly Fig. 16 two or three times with a manual hammer holding the core bit, then the thread becomes loose and (3) Insert the center pin into the guide plate until it the core bit can be removed. stops. (4) Engage the guide plate with the core bit, and turn the guide plate to left or right so that it does not fall even if it faces downward. (Fig. 17) Core bit shank Fig. 19 11