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T ECHNICAL INFORMATION
Models No. 4112H, 4112HS
W
PRODUCT
P 1 / 14
Description 305mm (12") Angle Cutter L
CONCEPTION AND MAIN APPLICATIONS
The above 305mm (12") angle cutters have been developed
as a successor to the existing model 4110C.
Their features and benefits are ; H
* 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.
Dimensions : mm ( " )
Length ( L ) 648 (25-1/2)
Width ( W ) 240 (9-1/2)
Height ( H ) 273 (10-3/4)
* Width ( W ):from the base to the rear of
Specification motor housing
Continuous Rating (W) Max.
Voltage (V) Current (A) Cycle (Hz) Output(W)
Input Output
4112H 120 15 AC / DC 1,650 800 3,000
110 23 50 / 60 2,400 1,500 2,750
120 15 50 / 60 1,650 800 3,000
4112HS
220 11.5 50 / 60 2,400 1,600 3,700
230 11 50 / 60 2,400 1,600 3,700
240 10.5 50 / 60 2,400 1,600 3,700
Model No. 4112H 4112HS
No load speed : min-1= rpm. 5,000
Diameter : mm (") 305 (12)
Wheel size
Arbor : mm (") 25.4 (1)
Safety clutch Yes (Super Joint System)
Soft start feature No Yes
Net weight : kg (lbs) 10.3 (22.7)
Power supply cord :m ( ft ) 2.5 (8.2)
Standard equipment
* Socket wrench 17 ............................................ 1 pc.
* Plastic carrying case ........................................ 1 pc.
< Note > The standard equipment for the tool shown may differ from country to country.
Optional accessories
* Various diamond wheels ( dry only)
* Various abrasive cut off wheels
* Ring 20
* Base set
* Elbow joint 32 assembly
* Plastic carrying case
Features and benefits P 2 / 14
4112H, 4112HS
Nozzle for connection with Soft start feature for absorbing the
vacuum cleaner initial shock (only for 4112HS)
AC/DC switch
(exclusively for North America)
Equipped with dust cover
For protection of operator's hand
against the dust and chips
305mm (12") Diamond wheel can be fitted.
Max. cutting depth up 100mm (3-15/16").
Super Joint System - "SJS"
provides following benefits.
* Smooth and comfortable cutting work.
* Absorbing shock by accidental
wheel lock.
* Protection from gear damage
from accidental wheel lock.
Comparison of products P 3 / 14
Model No. MAKITA Competitor A Competitor B
A-E A-v.A
Specifications 4112H 4112HS 4110C (in Europe) (in USA.) B
Diamond wheel : mm 305 305 255 300
(") ( 12 ) ( 12 ) ( 10 ) ( 11-3/4 )
Abrasive cut off wheel : mm 305 305 305 300 305 305
(") ( 12 ) ( 12 ) ( 12 ) ( 11-3/4 ) ( 12 ) ( 12 )
Wheel's arbor diameter : mm 25.4 25.4 25.4 22.2 25.4 25.4
(") (1) (1) (1) ( 7/8 ) (1) (1)
Power input : W 1,650 (a) 2,400 2,100 2,400
Continuous rating amperage : A 15 15 15 15
No load speed : min-1=rpm. 5,000 5,000 3,500 5,000 5,000 5,000
Diamond wheel : mm 100 100 75
Cutting (") ( 3-15/16 ) ( 3-15/16 ) ( 2-15/16 )
depth Abrasive cut off wheel: mm 100 100 100 98 101
(") ( 3-15/16 ) ( 3-15/16 ) ( 3-15/16) ( 3-7/8) (4)
Cutting pulling toward operator
by pushing away from operator
Soft start feature No Yes No Yes No No
AC / DC Switch (b) Yes No No No No Yes
Connecting with vacuum cleaner Yes Yes Yes No No No
Protection from Double insulation
electric shock Grounding
Length : mm 648 648 635 610 610 610
Dimensions
(") ( 25-1/2 ) ( 25-1/2 ) ( 25 ) ( 24 ) ( 24 ) ( 24 )
Width : mm 240 240 220 242 242 265
(") ( 9-1/2 ) ( 9-1/2 ) ( 8-5/8 ) ( 9-1/2 ) ( 9-1/2 ) ( 10-3/8 )
Height : mm 273 273 227 215 215 245
(") ( 10-3/4 ) ( 10-3/4 ) ( 8-15/16 ) ( 8-1/2 ) ( 8-1/2 ) ( 9-5/8 )
Net Catalog 10.3 ( 22.7 ) 10.3 ( 22.7 ) 9.0 (19.8) 6.2 (13.7) 11 (24.3) 11.8 (26.0)
weight : Kg (lbs) (c) Measured 10.3 ( 22.7 ) 10.3 ( 22.7 ) 9.0 (19.8) 10.5(23.2) 10.5(23.2) 12.3 (27.1)
Box wrench
Carrying case Plastic Plastic Steel
Standard Hex wrench
equipments Wrench
Abrasive cut of wheel
(a) : For Europe ( except Switzerland )
(b) : (only for USA)
(c) : Net weight without wheel and power supply cord
P 4 / 14
Comparison of products
The test of the machine for North America
Testing conditions.
1. 2 sets of cord reel (1.2mm2 x 30m ) are connected with the machine as illustrated below.
Model 4112H
connected to
power source.
2. The same diamond wheels or abrasive cut off wheels are mounted to the every testing machines.
3. Numbers in charts below are relative values when setting BOSCH model 1364 's cutting speed as 100.
The test blade : Diamond wheel The test blade : Abrasive cut off wheel
Angle steel L L
L = 50mm (2")
crete T
ced con T = 4mm (5/32")
Reinfor T : 35mm (1-3/8") in thickness
MAKITA 4112H
105 100
BOSCH 1364 100 100
DeWALT DW866 90 90
0 50 100 150 0 50 100 150
Slow Fast Slow Fast
The test of the machine for Europe and other countries
Testing conditions.
1 set of cord reel (1.5mm2 x 50m ) is connected with the machine as illustrated below.
Model 4112HS
connected to
power source.
2. The same diamond wheels or abrasive cut off wheels are mounted to the every testing machines.
3. Numbers in charts below are relative values when setting BOSCH model GWS24-300J 's cutting speed as 100.
The test blade : Diamond wheel The test blade : Abrasive cut off wheel
Angle steel L L
L = 50mm (2")
crete T
ced con T = 4mm (5/32")
Reinfor T : 35mm (1-3/8") in thickness
MAKITA 4112HS 105 120
BOSCH GWS24-300J 100 100
0 50 100 150 0 50 100 150
Slow Fast Slow Fast
Repair P 5 / 14
< 1 > Lubrication
Apply MAKITA grease SG. No.0 to the following portions designated by black triangle to protect
parts and product from unusual abrasion.
32
Spiral bevel gear 48
26
17
Fig. 1
Position Amount to
No. Parts items The portion to be lubricated be applied
17 Spindle The portion where spiral bevel gear 48 contacts approx. 1g (0.04 oz)
26 Lock spring 24 Its surface approx. 1g (0.04 oz)
32 Gear housing Its gear room approx. 40g (1.41 oz)
< 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.
Wing bolt M8x20
Flat washer 8
Hex bolt M6 Spring washer 8
Base
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.
Pressure
plate
Hex bolt
Fig. B M5x14
Repair P 6 / 14
( 3 ) Remove 2 pcs. of hex bolt M8x20. Then wheel cover section can be removed from the machine.
See Fig. C.
Be careful, not to lose
plate B.
Hex bolt
M8x20
Plate B
Hex bolt
M8x20
Fig. C
< 3 > Disassembling gear section
( 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.
Hex bolt M5x14 Lock sleeve
Spiral
Gear section
bevel gear 48
Retaining
ring S-15
Flat
washer 15
Ball bearing
6000LLB
Fig. 2 Fig. 3 Fig. 4 Fig. 5
< Note >
Be careful not to damage
the Labyrinth fence of spindle
in this stage.
Spindle
Labyrinth fence
Fig. 6
Repair P 7 / 14
< 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.
( 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.
( 6 ) Mount the gear section to gear housing, and secure it with 4 pcs.of pan head screw M5x14. See Fig. 10.
Lock sleeve
Spiral
bevel gear 48 Retaining
ring S-15
Spindle
Bearing Flat
box washer 15
Fig. 6 Fig. 7 Fig. 8
Hex bolt M5x14
Gear section
Bearing
setting plate
Ball bearing
6000LLB
Fig. 9
Fig. 10
Repair P 8 / 14
< 5 > Disassembling clutch section
( 1 ) For removing clutch section from bearing box, take the step of Fig. 2, Fig.3, Fig.4 and Fig. 5 at page 6.
( 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 Soft cloth Water plier
Lock
sleeve
Fig. 12
Lock
Spiral bevel gear 48 spring 24
Spiral bevel gear 48 < Note >
Cover the lock spring 24 with soft cloth to protect from
Fig. 11 the damage as per this illustration.
< 6 > Assembling clutch section
( 1 ) Apply MAKITA grease SG. No.0 to the lock spring 24.
( 2 ) First, put the lock spring 24 slantingly on the spiral bevel gear 48. And press, such as, the portion A
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.
( 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.
Arbor press
Spiral bevel
gear 48
D A C B A
D A C B
C B D
B A D C
Lock spring 24
Fig. 13A Fig. 13B Fig. 13C Fig. 13D Fig. 13E
Arbor press
Lock Spiral bevel
sleeve gear 48
Lock
spring 24
Fig. 14A Fig. 14B Fig. 14C Fig. 14D
Repair P 9 / 14
< 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.
Hex bolt M5x20 Fig. 15
Gear section
Dust cover
Fig. 16
Armature Brush holder cap
Gear housing Motor housing
Hex bolt M5x40
Carbon brush
Carbon brush
Brush holder cap
( 3 ) After unscrewing hex nut M8x12, remove spiral bevel gear 9 from armature shaft. See Fig. 17.
Hex nut Spiral bevel
Gear housing M8x12 gear 9
Armature
Fig. 17
Repair P 10 / 14
( 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.
Ball bearing 6202DDW
Flat washer 15
Flat washer 30
Armature
Fig. 18 Retaining ring R-40
Ball bearing
6202DDW
Fig. 19
< 8 > Mounting armature
( 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.
Rubber ring 36
Retaining
ring R-40
Ball baring Flat washer 30
6202DDW
Fig. 20 Flat washer 15
Fig. 21
( 3 ) Mount spiral bevel gear 9 and secure it with hex nut M8x12. See Fig. 22.
The fastening torque of the hex nut M8x12 has to be 7.4 N.m - 15.0 N.m.
Spiral bevel Hex nut
Gear housing gear 9 M8x12
Armature
Fig. 22
Repair P 11 / 14
< 8 > Mounting wheel cover and base
( 1 ) After mounting plate B to bearing box, mount wheel cover section to the machine with aligning the hole A
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.
Wheel cover section
Hole A
Bearing box Plate B
Pressure
plate
Hex bolt
Fig. 25 Fig. 26 M5x14
Hex bolt
M8x20
Hex bolt
M8x20 Fig. 27
( 4 ) Mount base to the machine by secureing with wing bolt M8x20 and 2 pcs. of hex bolt M6. See Fig. 28.
Wing bolt M8x20
Flat washer 8
Hex bolt M6 Spring washer 8
Base
Fig. 28
Repair P 12 / 14
< Caution >
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.
21
0
Carbon Brush CB-210
Circuit diagram P 13 / 14
Color index of lead wires
Black
White
Orange
Purple
Brush holder
(Right)
Brush holder
(Left)
Insulated
terminal
1. Circuit diagram for model 4112H
Brush holder
Brush holder
(left)
(right)
Power supply cord
2 1
Field
2 1
Switch Noise Insulated
suppressor terminal
2. Circuit diagram for model 4112HS Insulated
terminal
Insulated receptacle
Brush holder
1 1 Brush holder
1 (left)
(right)
5
Switch
2
2 2 2
Field
Line filter
Soft start Noise Insulated
circuit suppressor terminal
Wiring diagram P 14 / 14
Wiring in the motor housing (Model 4112H and 4112HS)
Connecting lead wire (purple)
Hook of brush holder
Pass the following lead
wires through the hook.
* Field lead wire (black)
* Field lead wire (orange) Field lead wire
(purple)
Field lead wire
(orange)
Hook
Pass the following lead Connecting lead wire (orange)
wires through the hook. of brush holder
* Field lead wire (black)
* Connecting lead wire (orange)
of brush holder Field lead wire (black)
Wiring in the handle Put noise suppressor in this space, Hold the 2 field lead wires
(Model 4112H) if it is used. (black) with lead holder.
Hold the following lead
wires with lead holder.
*Field lead wire (purple)
*Field lead wire (orange)
*Connecting lead wire
(purple) of brush holder
*Connecting lead wire
(orange) of brush holder
Wiring in the handle
(Model 4112HS)
The slits of insulated receptacles Slit
have to be faced to the same Hold the following lead
direction, when connecting to wires with lead holder.
the terminals of switch. * 2 Field lead wires
Terminal of switch Insulated receptacle (black)
* Soft start lead wire
Rib (white)
* Soft start lead wire
(orange of red)
Hold the following lead
wires with lead holder.
*Field lead wire (purple)
*Field lead wire (orange)
*Connecting lead wire
(purple) of brush holder
*Connecting lead wire
Put noise suppressor in this space, (orange) of brush holder
if it is used. If line filter is used, pass 2 field
lead wires (black) through it.
Pass the lead wires of power supply Soft start circuit And put the line filter in this place.
cord by the rib.