Maktec MT870 Instruction Manual Download Page 5

This tool has a reversing switch to change the direction of 
rotation. Move the reversing switch lever to the

position 

(A side) for clockwise rotation or the

position (B side) 

for counterclockwise rotation. 

Selecting the action mode 

1

2

3

 

 

012281 

This tool employs an action mode changing knob. Select 
one of the two modes suitable for your work needs by 
using this knob. 
For rotation only, turn the knob so that the arrow on the 
knob points toward the

symbol on the tool body. 

For rotation with hammering, turn the knob so that the 
arrow on the knob points toward the

symbol on the tool 

body. 

 

CAUTION: 

• 

Always set the knob fully to your desired mode 
symbol. If you operate the tool with the knob 
positioned halfway between the mode symbols, the 
tool may be damaged. 

• 

Use the knob after the tool comes to a complete 
stop. 

Torque limiter 

The torque limiter will actuate when a certain torque level 
is reached. The motor will disengage from the output 
shaft. When this happens, the bit will stop turning. 

 

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, are not appropriate for this tool. 
This is because they will cause the torque limiter to 
actuate too frequently. 

 
 
 
 
 

ASSEMBLY 

 

CAUTION: 

• 

Always be sure that the tool is switched off and 
unplugged before carrying out any work on the 
tool. 

Side grip (auxiliary handle) 

1

2

3

 

 

012283 

CAUTION: 

• 

Always use the side grip to ensure operating 
safety. 

Install the side grip so that the protrusions on the grip fit 
in between the grooves on the tool barrel. Then tighten 
the thumb screw to fix the grip at the desired position. It 
may be swung 360° so as to be secured at any position. 

Bit grease 

Coat the bit shank head beforehand with a small amount 
of bit grease (about 0.5 - 1 g). 
This chuck lubrication assures smooth action and longer 
service life. 

Installing or removing the bit 

2

1

 

 

003150 

Clean the bit shank and apply bit grease before installing 
the bit. 

1

 

 

010714 

1. Bit 

1. Bit shank 
2. Bit grease 

1. Thumb screw 
2. Protrusions 
3. Grooves 

1. Action mode 

changing knob

2. Rotation only 
3. Rotation with 

hammering 

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...

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