Makita 4112H Handbuch

Continuous Rating (W)

Voltage (V) Cycle (Hz) Input Output Max.

Output(W)

120 15

110

120

220 11.5

10.5

230

240

Models No.

Description

PRODUCT

Current (A)

TECHNICAL INFORMATION

CONCEPTION AND MAIN APPLICATIONS

Specification

Standard equipment

Optional accessories

< Note > The standard equipment for the tool shown may differ from country to country.

P 1 / 11

Dimensions : mm ( " )

Width ( W )

Height ( H )

Length ( L )

50 / 60

AC / DC

50 / 60

648 (25-1/2)

273 (10-3/4)

240 (9-1/2)

* Width ( W ):from the base to the rear of

motor housing

4112H, 4112HS

305mm (12") Angle Cutter

The above 305mm (12") angle cutters have been developed

as a successor to the existing model 4110C.

Their features and benefits are ;

* Super Joint System - SJS for suppression of shock

and prevention of damage on gear.

* 305m (12") diamond wheel which provides max.cutting

depth; 100mm (4"), can be used.

4112H

4112HS

1,650 3,000

2,750

3,000

3,700

1,650

2,400

2,400 1,500

1,600

800

2,400

No load speed : min-1= rpm.

Wheel size Diameter : mm (")

Arbor : mm (")

Safety clutch

Soft start feature

Net weight : kg (lbs)

Power supply cord :m ( ft )

5,000

305 (12)

25.4 (1)

10.3 (22.7)

2.5 (8.2)

Yes (Super Joint System)

YesNo

Model No.

* Socket wrench 17 ............................................ 1 pc.

* Plastic carrying case ........................................ 1 pc.

* Various diamond wheels ( dry only)

* Various abrasive cut off wheels

* Ring 20

* Base set

* Elbow joint 32 assembly

* Plastic carrying case

Repair

P 2 / 11

< 1 > Lubrication

Apply MAKITA grease SG. No.0 to the following portions designated by black triangle to protect

parts and product from unusual abrasion.

Spiral bevel gear 48

Position

No. Amount to

be applied

The portion to be lubricated

Parts items

Spindle

Lock spring 24

The portion where spiral bevel gear 48 contacts

Its surface

Gear housing

32 Its gear room

approx. 1g (0.04 oz)

approx. 40g (1.41 oz)

Fig. 1

< 2 > Removing base and wheel cover

( 1 ) Remove wing bolt M8x20, spring washer 8, flat washer 8 and 2 pcs. of hex bolt M6. Then, base can be removed

from the machine. See Fig. A.

( 2 ) Remove pressure plate by unscrewing 3 pcs. of hex bolt M5x14. Then, the wheel cover has been disengaged

from bearing box. See Fig. B.

Hex bolt M6

Wing bolt M8x20

Base

Fig. A

Fig. B

Spring washer 8

Flat washer 8

Pressure

plate

Hex bolt

M5x14

Repair

P 3 / 11

( 3 ) Remove 2 pcs. of hex bolt M8x20. Then wheel cover section can be removed from the machine.

See Fig. C.

Hex bolt

M8x20

Hex bolt

M8x20

Fig. C

Plate B

<Note>

Be careful, not to lose

plate B.

< 3 > Disassembling gear section

Fig. 2 Fig. 3 Fig. 4 Fig. 5

Fig. 6

Hex bolt M5x14

( 1 ) Remove gear section by unscrewing 4 pcs. of hex bolt M5x14. See Fig. 2.

( 2 ) Remove ball bearing 6000LLB. See Fig. 3.

( 3 ) After removing retaining ring S-15, remove flat washer 15. See Fig. 4.

( 4 ) Spiral bevel gear 48 with lock sleeve can be separated from spindle. See Fig. 5.

( 5 ) Remove spindle by pressing with arbor press as illustrated in Fig. 6.

Gear section

Ball bearing

6000LLB

Retaining

ring S-15

Flat

washer 15

Spiral

bevel gear 48

Lock sleeve

Spindle

< Note >

Be careful not to damage

the Labyrinth fence of spindle

in this stage.

Labyrinth fence

Repair

P 4 / 11

< 4 > Assembling gear section

( 1 ) Mount spindle by pressing with arbor press from wheel side. See Fig. 6.

( 2 ) Mount spiral bevel gear 48 together with lock sleeve. See Fig. 7.

( 3 ) Mount flat washer 15. Secure the spiral bevel gear 48 and the flat washer 15 with retaining ring S-15.

See Fig. 8.

( 4 ) Mount flat washer 15. Secure the spiral bevel gear 48 and the flat washer 15 with retaining ring S-15.

See Fig. 8.

( 6 ) Mount the gear section to gear housing, and secure it with 4 pcs.of pan head screw M5x14. See Fig. 10.

( 5 ) Put ball bearing 6000LLB on the bearing setting plate. Mount the spindle which has been mounted to the bearing

box, to the ball bearing 6000LLB by pressing with arbor press. See Fig. 9.

The assemble of gear section has been completed at this stage.

Fig. 7 Fig. 8

Fig. 9

Fig. 10

Fig. 6

Spindle

Bearing

box

Retaining

ring S-15

Flat

washer 15

Spiral

bevel gear 48

Lock sleeve

Ball bearing

6000LLB

Bearing

setting plate

Hex bolt M5x14

Gear section

Repair

P 5 / 11

< 5 > Disassembling clutch section

< 6 > Assembling clutch section

Fig. 11

Fig. 12

Fig. 14A Fig. 14B Fig. 14C Fig. 14D

( 1 ) For removing clutch section from bearing box, take the step of Fig. 2, Fig.3, Fig.4 and Fig. 5 at page 3.

( 1 ) Apply MAKITA grease SG. No.0 to the lock spring 24.

( 3 ) Lock sleeve can be mounted to the spiral bevel gear 48 in the same way as the lock spring 24.

See Fig. 14A,B,C and D.

( 2 ) First, put the lock spring 24 slantingly on the spiral bevel gear 48. And press, such as, the portionA

of lock spring 24 See Fig. 13A

Second, turn the spiral bevel gear 48, and press the portion D. See Fig. 13B

Thirdly, turn the spiral bevel gear 48, and press the portion C. See Fig. 13C

Fourthly, turn the spiral bevel gear 48, and press the portion B. See Fig. 13D.

And finally, press the lock spring 24 into the spiral bevel gear 48 completely. See Fig. 13E.

( 2 ) Turning lock sleeve clockwise, pull the spiral bevel gear 48. So lock sleeve can be separated from the spiral

bevel gear 48. See Fig. 11.

( 3 ) Turning the lock spring 24 clockwise, pull the spiral bevel gear 48. So lock spring 24 can be separated

from the spiral bevel gear 48. See Fig. 12.

Water plier

Spiral bevel gear 48

Lock

sleeve

Spiral bevel gear 48

Water plier

Lock

spring 24

Soft cloth

< Note >

Cover the lock spring 24 with soft cloth to protect from

the damage as per this illustration.

CDBCD

Spiral bevel

gear 48

Lock spring 24

Lock

sleeve

Lock

spring 24

Fig. 13A Fig. 13B Fig. 13C Fig. 13D Fig. 13E

Arbor press

Spiral bevel

gear 48

Repair

P 6 / 11

< 7 > Removing armature

( 1 ) After removing 4 pcs. of hex bolt M5x20, remove gear section from gear housing. And remove dust cover.

See fig. 15.

( 2 ) Remove brush holder caps and carbon brushes, and unscrew 4 pcs. of hex bolt M5x40. Then, motor housing can

be separated from gear housing. See Fig. 16.

( 3 ) After unscrewing hex nut M8x12, remove spiral bevel gear 9 from armature shaft. See Fig. 17.

Fig. 15

Fig. 16

Fig. 17

Hex bolt M5x20

Gear section

Brush holder cap

Carbon brush

Brush holder cap

Hex bolt M5x40 Gear housing Motor housing

Armature

Gear housing

Armature

Hex nut

M8x12

Spiral bevel

gear 9

Dust cover

Repair

P 7 / 11

Fig. 22

( 3 ) Mount spiral bevel gear 9 and secure it with hex nut M8x12. See Fig. 22.

( 1 ) Make sure, if the rubber ring 36 remains in the gear housing. If not, mount it. Mount the parts to the gear

housing in the following order.

1. Ball baring 6202DDW 2. Flat washer 30

And then, secure them with retaining ring R-40. See Fig. 20.

( 2 ) After mounting flat washer 15 to the armature shaft, mount the armature to the gear housing by pressing

with arbor press. See Fig. 21.

The fastening torque of the hex nut M8x12 has to be 7.4 N.m - 15.0 N.m.

Gear housing

Armature

Spiral bevel

gear 9 Hex nut

M8x12

( 4 ) Armature can be removed together with flat washer 15 from gear housing by striking the edge of motor

housing with plastic hammer. See Fig. 18.

( 5 ) After removing retaining ring R-40 and flat washer 30, insert the armature removed in the step (4) into

the ball bearing 6202DDW. And pull out the ball bearing 6202DDW by swaying the armature.

See Fig. 19.

Fig. 18

Flat washer 15

Armature

Retaining ring R-40

Flat washer 30

Ball bearing 6202DDW

Ball bearing

6202DDW

Fig. 19

< 8 > Mounting armature

Rubber ring 36

Ball baring

6202DDW Flat washer 30

Retaining

ring R-40

Fig. 20

Fig. 21

Flat washer 15

Repair

P 8/ 11

( 4 ) Mount base to the machine by secureing with wing bolt M8x20 and 2 pcs. of hex bolt M6. See Fig. 28.

Hex bolt M6

Wing bolt M8x20

Base Spring washer 8

Flat washer 8

Fig. 28

< 8 > Mounting wheel cover and base

( 1 ) After mounting plate B to bearing box, mount wheel cover section to the machine with aligning the holeA

with the bearing box. See Fig. 25.

( 2 ) Aligning the three screw holes of pressure plate with the same of baring box, mount pressure plate

to the bearing box. And then, fix the pressure plate to the bearing box with 3 pcs. of hex bolt M5x14.

See Fig. 26.

( 3 ) Fix the wheel cover section to the gear housing with 2 pcs. of hex bolt M8x20. See Fig. 27.

The mounting of wheel cover section to machine has been completed with this stage.

Fig. 25

Fig. 27

Hole A

Wheel cover section

Plate B

Bearing box Pressure

plate

Hex bolt

M5x14

Fig. 26

Hex bolt

M8x20

Hex bolt

M8x20

Repair

P 9 / 11

When repairing Model 4112H or 4112HS of North American specification (for up to 120V),

CB-210 has to be used for replacement of carbon brush.

Using carbon brushes other than CB-210 for 4112H and 4112HS may cause the trouble, such as

melting down of motor housing, etc.

< Caution >

210

Carbon Brush CB-210

Circuit diagram

P 10 / 11

Insulated

terminal

Insulated

terminal

Color index of lead wires

Black

White

Orange

Purple

Brush holder

(left)

Field

Brush holder

(right)

Insulated

terminal

Insulated

terminal

Brush holder

(left)

Field

Brush holder

(right)

Power supply cord

1. Circuit diagram for model 4112H

2. Circuit diagram for model 4112HS

Soft start

circuit

Switch

Switch Noise

suppressor

Noise

suppressor

Insulated receptacle

Line filter

(Left)

(Right)

Brush holder

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