Maktec MT870 Instruction Manual Download Page 6

Insert the bit into the tool. Turn the bit and push it in until it 
engages. 
After installing, always make sure that the bit is securely 
held in place by trying to pull it out. 

1

2

 

 

012285 

To remove the bit, pull the chuck cover down all the way 
and pull the bit out. 

Depth gauge 

1

2

 

 

012286 

The depth gauge is convenient for drilling holes of 
uniform depth. Loosen the thumb screw and adjust the 
depth gauge to the desired depth. After adjusting, tighten 
the thumb screw firmly. 

 

NOTE: 

• 

The depth gauge cannot be used at the position 
where the depth gauge strikes against the gear 
housing/motor housing. 

OPERATION 

Always use the side grip (auxiliary handle) and firmly 
hold the tool by both side grip and switch handle during 
operations. 

Hammer drilling operation 

   

012292 

Set the action mode changing knob to the 

 symbol. 

Position the bit at the desired location for the hole, then 

pull the switch trigger. Do not force the tool. Light 
pressure gives best results. Keep the tool in position and 
prevent it from slipping away from the hole. 
Do not apply more pressure when the hole becomes 
clogged with chips or particles. Instead, run the tool at an 
idle, then remove the bit partially from the hole. By 
repeating this several times, the hole will be cleaned out 
and normal drilling may be resumed. 
Set the action mode changing knob to the 

 symbol. 

 

CAUTION: 

• 

There is a tremendous and sudden twisting force 
exerted on the tool/bit at the time of hole 
break-through, when the hole becomes clogged 
with chips and particles, or when striking reinforcing 
rods embedded in the concrete. Always use the 
side grip (auxiliary handle) and firmly hold the tool 
by both side grip and switch handle during 
operations. Failure to do so may result in the loss of 
control of the tool and potentially severe injury. 

NOTE: 

Eccentricity in the bit rotation may occur while operating 
the tool with no load. The tool automatically centers itself 
during operation. This does not affect the drilling 
precision. 

Drilling in wood or metal 

1

2

 

 

012293 

Use the optional drill chuck assembly. When installing it, 
refer to the section "Installing or removing the bit". 

 

CAUTION: 

• 

Never use "rotation with hammering" when the drill 
chuck is installed on the tool. The drill chuck may 
be damaged. 
Also, the drill chuck will come off when reversing 
the tool. 

• 

Pressing excessively on the tool will not speed up 
the drilling. In fact, this excessive pressure will only 
serve to damage the tip of your bit, decrease the 
tool performance and shorten the service life of the 
tool. 

• 

There is a tremendous twisting force exerted on the 
tool/bit at the time of hole breakthrough. Hold the 
tool firmly and exert care when the bit begins to 
break through the workpiece. 

1. Chuck adapter 
2. Keyless drill 

chuck 

1. Thumb screw 
2. Depth gauge 

1. Bit 
2. Chuck cover 

Summary of Contents for MT870

Page 1: ...1 ENGLISH Original instructions INSTRUCTION MANUAL DOUBLE INSULATION IMPORTANT Read Before Using Rotary Hammer MT870 012278...

Page 2: ...The tool should be connected only to a power supply of the same voltage as indicated on the nameplate and can only be operated on single phase AC supply They are double insulated in accordance with Eu...

Page 3: ...onnection of dust extraction and collection facilities ensure these are connected and properly used Use of dust collection can reduce dust related hazards Power tool use and care 18 Do not force the p...

Page 4: ...st inhalation and skin contact Follow material supplier safety data SAVE THESE INSTRUCTIONS WARNING DO NOT let comfort or familiarity with product gained from repeated use replace strict adherence to...

Page 5: ...g CAUTION As soon as the torque limiter actuates switch off the tool immediately This will help prevent premature wear of the tool Bits such as hole saw which tend to pinch or catch easily in the hole...

Page 6: ...he action mode changing knob to the symbol CAUTION There is a tremendous and sudden twisting force exerted on the tool bit at the time of hole break through when the hole becomes clogged with chips an...

Page 7: ...n CAUTION If performing diamond core drilling operations using rotation with hammering action the diamond core bit may be damaged MAINTENANCE CAUTION Always be sure that the tool is switched off and u...

Page 8: ...8 Makita Corporation www makita com 885072 4...

Reviews: