
9ENGLISH
FUNCTIONAL 
DESCRIPTION
CAUTION: Always be sure that the tool is 
switched off and unplugged before adjusting or 
checking function on the tool.
Switch action
CAUTION: 
Before plugging in the tool, always 
check to see that the switch trigger actuates properly 
and returns to the "OFF" position when released.
CAUTION: Switch can be locked in “ON” posi-
tion for ease of operator comfort during extended 
use. Apply caution when locking tool in “ON” 
position and maintain rm grasp on tool.
►Fig.1: 1. Switch trigger 2. Lock button
►Fig.2: 1. Switch trigger 2. Lock button
Tostartthetool,simplypulltheswitchtrigger.Tool
speed is increased by increasing pressure on the switch 
trigger. Release the switch trigger to stop.
For continuous operation, pull the switch trigger, push 
in the lock button and then release the switch trigger. 
Tostopthetoolfromthelockedposition,pulltheswitch
trigger fully, then release it.
Reversing switch action
CAUTION: Always check the direction of 
rotation before operation.
NOTICE: 
Use the reversing switch only after the 
tool comes to a complete stop. Changing the direction 
of rotation before the tool stops may damage the tool.
NOTICE: If the switch trigger cannot be 
depressed, check to see that the reversing switch 
is fully set to position / (A side) or / (B 
side).
For HR2650/HR2651/HR2651T
Thistoolhasareversingswitchtochangethedirec-
tion of rotation. Move the reversing switch lever to the 
position (Aside)forclockwiserotationortotheposi-
tion (B side) for counterclockwise rotation.
►Fig.3: 1. Reversing switch lever
For HR2661
Thistoolhasareversingswitchtochangethedirec-
tion of rotation. Move the reversing switch lever to 
the position(Aside)forclockwiserotationor
the position (B side) for counterclockwise rotation.
►Fig.4: 1. Reversing switch lever
NOTE: When you operate the tool in counterclock-
wise rotation, the switch trigger is pulled only halfway 
and the tool runs at half speed. For counterclockwise 
rotation, you cannot push in the lock button.
Changing the quick change chuck 
for SDS-plus
For HR2651T
ThequickchangechuckforSDS-pluscanbeeasily
exchangedforthequickchangedrillchuck.
Removing the quick change chuck 
for SDS-plus
CAUTION: Before removing the quick change 
chuck for SDS-plus, be sure to remove the bit.
Grasp the change cover of the quick change chuck 
for SDS-plus and turn in the direction of the arrow 
until the change cover line moves from the symbol 
to the symbol. Pull forcefully in the direction of the 
arrow.
►Fig.5: 1. Quick change chuck for SDS-plus 
2. Change cover 3. Change cover line
Installing the quick change drill 
chuck
Check the line of the quick change drill chuck shows 
the symbol. Grasp the change cover of the quick 
change drill chuck and set the line to the symbol. 
Place the quick change drill chuck on the spindle of the 
tool. Grasp the change cover of the quick change drill 
chuck and turn the change cover line to the symbol 
until a click can clearly be heard.
►Fig.6: 1. Quick change drill chuck 2. Spindle 
3. Change cover line 4. Change cover
Selecting the action mode
NOTICE: Do not rotate the action mode chang-
ing knob when the tool is running.Thetoolwillbe
damaged.
NOTICE: To avoid rapid wear on the mode 
change mechanism, be sure that the action mode 
changing knob is always positively located in one 
of the three action mode positions.
Rotation with hammering
For drilling in concrete, masonry, etc., rotate the action 
mode changing knob to the symbol. Use a tungsten-
carbide tipped bit (optional accessory).
►Fig.7: 1. Rotation with hammering 2.Actionmode
changing knob
Rotation only
For drilling in wood, metal or plastic materials, rotate 
the action mode changing knob to the symbol. Use a 
twist drill bit or wood drill bit.
►Fig.8: 1. Rotation only