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Model No.

 Description

MT912
Die Grinder

L

H

W

Dimensions: mm (")

Width (W)
Height (H)

Length (L)

350 (13-3/4)
75 (2-15/16)
75 (2-15/16)

Wrench .....................................  2

Collet cone 6mm or 1/4” ..........  1

Insulation cover ........................  1 (for some countries only) 

PRODUCT

C

ONCEPT AND MAIN APPLICATIONS

P  1/ 1

S

pecification

S

tandard equipment

O

ptional accessories

Note:

 The standard equipment for the tool shown above may vary by country.

Collet cones (3mm, 6mm, 1/8”, 1/4”)

Continuous Rating (W)

Voltage (V)

Cycle (Hz)

Input

Output

140

Max. Output (W)

110

220

240

4.6

2.1

50/60

50/60

50/60

480

480

480

380

380

140

380

120

4.2

50/60

---

380

Current (A)

140

140

2.3

230

50/60

480

380

140

2.2

Model MT912 has been developed as the cosmetic change model of 

maktec

 die grinder MT911.

Its main features are:

 • Industrial performance and durability at less expense

 • Anti-slip ribs on motor housing for higher maneuverability and 

    better control

Collet size

*

1

*1

: 3mm and 1/8” shank collets can be used by changing Collet cone.

*2

: Max wheel diameter for China is the same of 20mm (13/16”).

*3

: with Collet nut, Collet cone

6mm or 1/4”

Max wheel diameter

*

2

: mm (")

33,000

20 (13/16)

2.0 (6.6)
1.4 (3.1)

Weight according to 

EPTA-Procedure 01/2003

*

3

: kg (lbs)

Double insulation

Protection against electric shock

No load speed: min.

ˉ

¹=rpm 

Power supply cord: m (ft)

T

ECHNICAL INFORMATION

Summary of Contents for Maktec MT912

Page 1: ...0 140 380 120 4 2 50 60 380 Current A 140 140 2 3 230 50 60 480 380 140 2 2 Model MT912 has been developed as the cosmetic change model of maktec die grinder MT911 Its main features are Industrial performance and durability at less expense Anti slip ribs on motor housing for higher maneuverability and better control Collet size 1 1 3mm and 1 8 shank collets can be used by changing Collet cone 2 Ma...

Page 2: ...ar for Arbor 26 100 mounting Ball bearing 629ZZ to Barrel 1R269 Bearing extractor removing Ball bearing 607ZZ from Armature 1R282 Round bar for Arbor 8 50 attaching to 1R045 when mounting Ball bearing 6001ZZ to Spindle attaching to arbor press when removing Armature from Gear housing cover 784416 4 Socket bit 17 55 removing mounting Coupling 2 LUBRICATION Apply Lubricant VG100 to the following por...

Page 3: ... cone 6 0 from Spindle 4 Remove Spacer from Coupling And then remove Flat washer 22 from Barrel if the washer is still in Barrel 5 While holding Spindle with Wrench 13 remove Coupling from Barrel with Impact driver and 784416 4 by turning it counterclockwise 6 Fix Barrel in Vise Then remove Bearing retainer with Adjustable wrench by turning it counterclockwise 7 Remove Felt ring 17 and Flat washer...

Page 4: ...5 from Spindle 1 Put Barrel on 1R232 And then remove Spindle by pressing 1R282 with Arbor press 2 Remove Ball bearing 629ZZ from Barrel by pressing 1R247 with arbor press Fig 3 1R232 Ball bearing 6001Z Ball bearing 629Z Spindle 1R282 Ball bearing 6001Z Spindle Retaining ring S 12 Ball bearing 629Z Barrel 1R247 3 DISASSEMBLY ASSEMBLY 3 1 Barrel Section cont 1R291 1R045 P 4 11 ...

Page 5: ...pindle section to Barrel by press fitting with 1R031 1R282 1R282 Retaining ring S 12 2 Install Retaining ring S 12 to Spindle with 1R291 in order to secure Ball bearing 6001ZZ Ball bearing 629Z 1R250 Ball bearing 629ZZ 1R031 3 DISASSEMBLY ASSEMBLY 3 1 Barrel Section cont Fig 6 Flat washer 18 3 Fix barrel with Vise and then fasten Bearing retainer to Barrel by turning it clockwise with Adjustable w...

Page 6: ...f Insulation cover to the concave portion on Barrel mount Insulation cover to Barrel Switch knob Barrel Fig 8 3 2 Armature DISASSEMBLING 1 Remove Brush holder caps and Carbon brushes Brush holder caps Carbon brushes 2 Separate Barrel section from Motor housing 3 Remove Armature together with Gear housing cover from Motor housing 4 Remove Spacer from Coupling on Armature 5 While holding Armature by...

Page 7: ...19 Ball bearing 629ZZ 1 Remove Baffle plate then unscrew two 4x70 Tapping screws 2 Install two M4x25 Tapping screws in the holes on two diagonal corners of Motor housing Then remove Field from Motor housing by alternately tapping the screw heads Note Do not tap the diagonal corners directly because the inlaid portion near the corners is fragile Insulation washer 1R269 M4x25 Tapping screws 4x70 Tap...

Page 8: ... lead wire type is used without grounding lead wire Correct Wrong Spindle rotates in the inverse direction to the indication on Barrel Fig R Fig F Fig D 1 maktec logo maktec logo Field Lead Wire black Field Lead Wire white Brush Holder s Lead Wire black Brush Holder s Lead Wire black Grounding terminal of Noise suppressor Black White Blue Brown Lead wire white is used for some countries instead of...

Page 9: ...he holes of Motor housing Insert the grounding terminal of noise suppressor s lead wire deeply into the hole of Motor housing Install Noise suppressor to the space painted with gray color in Fig D 2 Pass Field lead wires black and white through the groove of Support while tightening them between Motor housing and Support Groove of Support Groove of Support Field lead wire white Field lead wire bla...

Page 10: ...ng terminal Connect Connecting terminal to Switch as follows Screw hole side Top Lead wire side Bottom Terminal block Switch Fig D 4 Install Terminal block and Switch to Support Fig D 4 Switch Terminal block Support Switch Terminal block Noise suppressor Left Top Bottom Lead wire brown or black of Power supply cord ...

Page 11: ...ssor s lead wire to Terminal block Noise suppressor s lead wire to switch Top Bottom Right Fig D 6 Right side view Connecting terminal Connect Connecting terminal to Switch as follows Screw hole side Top Lead wire side Bottom Fix the following lead wires with Lead wire holder Field lead wire black Noise suppressor s lead wire for connecting to Terminal block Support section ...

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