Makita HR1821 instruction manual Switch action Tool speed is increased by increasing pres

Models: HR1821

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Switch action

Tool speed is increased by increasing pres-

,

Speed control screw

sure on the

trigger. To start the tool,

 

simply pull

the trigger. Release the

 

trigger to stop.

Fig. t

.A speed control screw is provided so that tool speed (RPM) can be changed a t the fully- pulled trigger position. Turn the speed control screw clockwise (+) for higher speed and counterclockwise (-)for lower speed.

CAUTION:

Before plugging in the tool, always check to see that the trigger switch actuates properly and returns to the "OFF" position when released.

Hammer drilling operation

.Position the drill bit a t the location for the hole, then pull the trigger.

Do not force the tool. Light pressure gives best results. Keep the tool in posi- tion and prevent it from slipping away from the hole.

When holes becomeclogged

.Do not apply more pressure when the hole becomes clogged with chips or par- ticles. Instead, run the tool a t idle, then remove from the hole. By repeating this several times, the hole will be cleaned out completely.

Fig. 9

CAUTION:

When drilling in concrete, it is quite possible that the drill bit could hit a reinforcing rod or some other object that could cause a kickback. Although this tool is equipped with the torque limiter, protect yourself by holding the tool firmly with both hands. (Be sure the side grip is secured tightly before operation.)

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Makita HR1821 instruction manual Switch action Tool speed is increased by increasing pres