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T ECHNICAL INFORMATION
Models No. 9556NB, 9557NB, 9558NB
PRODUCT
P 1 / 13
Description Angle Grinders 100/115/125mm (4/ 4-1/2/ 5") L
CONCEPT AND MAIN APPLICATIONS
The 9556NB series models have been developed as upgraded
sister tools of the current 9526NB series models. H
In masonry cutting, perform better than the current series models W
thanks to the following benefits:
*Powerful 840W motor with excellent heat resistance
*Labyrinth structures around bearings and dust-proof motor Dimensions: mm (")
Model No. 9556NB 9557NB 9558NB
AC/DC switch is used for the tools for USA and other Length (L) 271 (10-5/8)
North American countries.
Width (W) 118 (4-5/8) 129 (5-1/8) 139 (5-1/2)
Height (H) 97 (3-13/16) 106 (4-3/16)
Specification
Continuous Rating (W)
Voltage (V) Current (A) Cycle (Hz) Max. Output(W)
Input Output
110 8.0 50 / 60 840 500 1000
120 7.5 50 / 60 840 500 1000
220 4.0 50 / 60 840 500 1000
230 3.8 50 / 60 840 500 1000
240 3.7 50 / 60 840 500 1000
Model No. 9556NB 9557NB 9558NB
Depressed center wheel 100 (4) 115 (4-1/2) 125 (5)
Wire cup brush 75 (3) 90 (3-1/2)
Capacity: mm (")
Abrasive disc 100 (4) 115 (4-1/2) 125 (5)
Diamond wheel 100 (4) 115 (4-1/2) 125 (5)
No load speed: min.-1 = rpm 11,000*
Spindle thread M10x1.5/ M10x1.25 DIN/ 5/8"-UNC
Cord length: m (ft) 2.5 (8.2)
Net weight: kg (lbs) 1.6 (3.5)
*North America =10,000
Standard equipment
9556NB 9557NB 9558NB
Depressed center wheel 100-36 .... 1 Depressed center wheel 115-36 .... 1 Depressed center wheel 125-36 .... 1
Lock nut wrench 20 ...................... 1 Lock nut wrench 28 ...................... 1 Lock nut wrench 35 ...................... 1
Grip 36 complete .......................... 1 Grip 36 complete .......................... 1 Grip 36 complete .......................... 1
Note: The standard equipment for the tool shown above may differ by country.
Optional accessories
9556NB 9557NB 9558NB
Depressed center wheel 100-24 Depressed center wheel 115-24 Depressed center wheel 125-24
Depressed center wheel 100-36 Depressed center wheel 115-36 Depressed center wheel 125-36
Rubber pad 76 Rubber pad 100 Rubber pad 115
Sanding lock nut 10-30 Sanding lock nut 14-48 Sanding lock nut 14-48
Assorted 100mm abrasive discs Assorted 115mm abrasive discs Assorted 125mm abrasive discs
Wire cup brush 75 Super flange 47 Super flange 47
Wire bevel brush 85 Dust extracting wheel guards Dust extracting wheel guards
Base assembly Dust extracting wheel cover Dust extracting wheel cover
Wheel cover
Dust extraction attachment
P 2 / 13
Features and benefits
Powerful 840W Motor with * Labyrinth Construction
*
High Dust-Proof Motor
Excellent Heat Resistance Protects All Ball Bearings
Armature coated with protective
Ensures steady and efficient zigzag varnish, and Field coated from Dust and Debris.
masonry cutting. with powder varnish protects motor
(840W = continuous rating input) from dust and wire breakage, Motor with High *
ensuring durability enough for Heat-Resistance Performance
Rotatable Gear Housing * masonry cutting.
See the graph below.
Can be positioned at every
90 degrees to suit most cutting
and grinding operations.
Shaft Lock for *
Easy Wheel Changes
Dust-proof Ball Bearing *
On spindle and the commutator
end of armature; a dust-proof Small Circumference Barrel Grip *
washer is also installed on spindle. for Easy Handling
O Rings for Protection from * Use of Type 55 motor enables the circumference
Grease-Leakage to be smaller than competitions. And use of the
same brush as used for the Makita 9560 series
Placed in the following portions; models allows flat design without protrusions of
1) Joint between Gear housing and brush cap.
Bearing box
2) Shaft lock pin installation hole Gear Section with Increased Reparability *
Switch Lever Conveniently Located * Use of a woodruff key to assemble gear onto spindle
allows for easier repairing of gear section.
for One Hand Operation
The same advantage as the Makita 9560
series models. (*Same advantages as 9553NB series models)
Comparison of Heat Resistance Performance
Test conditions: Continuously cut 600mm wide concrete plate at a depth of 10mm with an identical diamond wheel
attached to all the models, and measured the temperature rise in the field.
Test result: The graph below proves the superiority of Makita 9557NB in heat-resistance performance.
120
100
80 Competitor B Mod. B
Temperature
(degree C)
60 Makita 9527NB
Competitor A Mod. A3
40 (Mod. A4)
Competitor C Mod. C
20
Makita 9557NB
0
0 5 10 15
Time (min.)
P 3 / 13
Comparison of products
[1] 9556NB and 9558NB
100mm (4") 125mm (5")
Model No.
Makita Makita
Specifications 9556NB 9526NB 9558NB 9528NB
100 100 125 125
Diameter
Wheel size: (4) (4) (5) (5)
mm ( " ) 16 16 22.23 22.23
Hole diameter
(5/8) (5/8) (7/8) (7/8)
Continuous rating input: W 840 750 840 750
Rated amperage for USA: A 7.5 --- 7.5 6.4
Max. output: W 1,000 850 1,000 850
-1
No load speed: min = rpm 11,000 11,000 11,000 11,000
(for USA) (10,000) (10,000) (10,000) (10,000)
AC/DC switch for USA Yes No Yes No
53 x 63 55 x 64 53 x 63 55 x 64
Size of grip portion: mm (")
(2-1/16 x 2-1/2) (2-3/16 x 2-1/2) (2-1/16 x 2-1/2) (2-3/16 x 2-1/2)
Circumference of 195 195 195 195
grip portion: mm (") (7-5/8) (7-5/8) (7-5/8) (7-5/8)
Double insulation Yes Yes Yes Yes
Cord length: m (ft) 2.5 (8.2) 2.5 (8.2) 2.5 (8.2) 2.5 (8.2)
271 256 271 256
Length: mm (")
(10-5/8) (10-1/8) (10-5/8) (10-1/8)
Dimensions
118 118 139 139
Width: mm (")
(4-5/8) (4-5/8) (5-1/2) (5-1/2)
97 111 106 111
Height: mm (")
(3-13/16) (4-3/8) (4-3/16) (4-3/8)
Net weight: Kg (lbs) 1.6 (3.5) 1.4 (3.1) 1.6 (3.5) 1.4 (3.1)
Side Grip Yes Yes Yes Yes
Standard
equipment Lock nut wrench Yes Yes Yes Yes
Wheel Yes Yes Yes Yes
P 4 / 13
Comparison of products
[2] 9557NB
115mm (4-1/2")
Model No. Makita Competitor A Competitor B Competitor C
A3 (USA)
9557NB 9527NB B C
Specifications A4 (Euro)
115 115 115 115 115
Diameter
Wheel size: (4-1/2) (4-1/2) (4-1/2) (4-1/2) (4-1/2)
mm (") 22.23 22.23 22.23 22.23 22.23
Hole diameter
(7/8) (7/8) (7/8) (7/8) (7/8)
Continuous rating input: W 840 750 750 750 800
Rated amperage for USA: A 7.5 6.4 7 7 ---
a) 880W (A3)
Max. output: W 1,000 630 b) 780 ---
b) 835W (A4)
-1
No load speed: min = rpm 11,000 11,000 11,000 11,000 11,000
(for USA) (10,000) (10,000)
AC/DC switch for U.S.A. Yes No Yes No ---
53 x 63 55 x 64 59 x 62 56 x 68 62 x 62
Size of grip portion: mm (")
(2-1/16 x 2-1/2) (2-3/16 x 2-1/2) (2-5/16 x 2-7/16) (2-3/16 x 2-11/16) (2-7/16 x 2-7/16)
Circumference of 195 195 202 203 199
grip portion: mm (") (7-5/8) (7-5/8) (8) (8) (7-1/8)
Double insulation Yes Yes Yes Yes Yes
Cord length: m (ft) 2.5 (8.2) 2.5 (8.2) 2.5 (8.2) 2.5 (8.2) 2.5 (8.2)
271 256 284 281 250
Length: mm (")
(10-5/8) (10-1/8) (11-1/8) (11-1/8) (9-7/8)
Dimensions
129 129 132 138 131
Width: mm (")
(5-1/8) (5-1/8) (5-3/16) (5-7/16) (5-1/8)
106 111 102 112 118
Height: mm (")
(4-3/16) (4-3/8) (4) (4-3/8) (4-5/8)
Net weight: Kg (lbs) 1.6 (3.5) 1.4 (3.1) 1.55 (3.4) 1.8 (3.9) 1.6 (3.5)
Side Grip Yes Yes Yes Yes Yes
Standard
equipment Lock nut wrench Yes Yes Yes Yes Yes
Wheel Yes Yes No No Yes
a) Actual wattage of low voltage machine measured by us
b) Actual wattage of high voltage machine measured by us
P 5 / 13
Comparison of products
Performance Comparison of Cutting/ Grinding - 1] Europe
Models Tested for Comparison: Makita 9557NB, 9527NB, Competitor A's Mod. A4, Competitor B's Mod. B,
Competitor C's Mod. C
1) EFFICIENCY OF CONCRETE CUTTING
Test conditions:
Cut concrete continuously at depths of 10mm and 20mm with an identical diamond wheel attached to all the models,
and measured the time required to cut a certain length.
Test results: See the graphs below.
Note: 1. The test results depend to a great extent on the hardness of materials, etc.
2. The numbers in the bar graphs are relative values when the capacity of Competitor A's Mod. A4
is indexed at 100.
[at a depth of 10mm] [at a depth of 20mm]
Slow Fast Slow Fast
Makita 9557NB 115 105
Makita 9527NB 85 90
Competitor A Mod. A4 100 100
Competitor B Mod. B 100 95
Competitor C Mod. C 120 110
0 50 100 150 0 50 100 150
Remark:
Although Competitor C's Mod. C cut a little bit faster than Makita 9557NB, it causes chatter vibration,
resulting in rather uncomfortable operation.
2) EFFICIENCY OF METAL GRINDING
Test conditions:
Ground a steel plate (of S45C) continuously for 10 minutes with an identical diamond wheel attached to all the models,
and measured the amount of the removed material.
Test results: See the graphs below.
Note: 1. The test results depend to a great extent on the hardness of materials, etc.
2. The numbers in the bar graphs are relative values when the capacity of Competitor A's Mod. A4
is indexed at 100.
[Amount of the material removed]
little Much
Makita 9557NB 95
Makita 9527NB 95
Competitor A Mod. A4 100
Competitor B Mod. B 80
Competitor C Mod. C 90
0 50 100 150
Remarks:
1) Except for Competitor B's Mod. B, the four models performed almost the same.
2) Makita 9557NB ground the test material smoothly, providing a strong impression that the wheel was always
touching the test material.
3) On Competitor C's Mod. C, the wheel badly wobbled, resulting in very uncomfortable operation.
P 6 / 13
Comparison of products
Performance Comparison of Cutting/ Grinding - 2] North America
Models Tested for Comparison: Makita 9557NB and Competitor A's Mod. A3
1) EFFICIENCY OF CONCRETE CUTTING
Test conditions:
Cut concrete continuously at depths of 10mm and 20mm with an identical diamond wheel attached to all the models,
and measured the time required to cut a certain length.
Test results: See the graphs below.
Note: 1. The test results depend to a great extent on the hardness of materials, etc.
2. The numbers in the bar graphs are relative values when the capacity of Competitor A's Mod. A3
is indexed at 100.
[at a depth of 10mm] [at a depth of 20mm]
Slow Fast Slow Fast
Makita 9557NB 100 100
Competitor A Mod. A3 100 100
0 50 100 150 0 50 100 150
Remark:
Makita 9557NB performed the same as Competitor A's Mod. A3.
2) EFFICIENCY OF METAL GRINDING
Test conditions:
Ground a steel plate (of S45C) continuously for 10 minutes with an identical diamond wheel attached to all the models,
and measured the amount of the removed material.
Test results: See the graphs below.
Note: 1. The test results depend to a great extent on the hardness of materials, etc.
2. The numbers in the bar graphs are relative values when the capacity of Competitor A's Mod. A3
is indexed at 100.
[Amount of the material removed]
little Much
Makita 9557NB 100
Competitor A Mod. A3 100
0 50 100 150
Remark:
Makita 9557NB performed the same as Competitor A's Mod. A3.
P 7 / 13
Repair
CAUTION: Disconnect the machine and remove the wheel for safety before repair/maintenance!
[1] NECESSARY REPAIRING TOOLS
Code No. Descriptions Purpose
1R028 Bearing Setting Pipe 20-12.2 Installing/removing Retaining ring S-12
1R045 Gear Extractor, large Disassembling Bearing box
1R269 Bearing Extractor, small Removing Ball bearing
1R291 Retaining Ring S and R Pliers For Retaining rings S-12 and R-32
1R343 Retaining Ring Setting Jig Installing Retaining ring S-12
[2] LUBRICATION AND SEALING
Put 7g of Makita Grease N. No.1 into the gear room of gear housing.
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Replacing Armature and Spiral Bevel Gear 10
DISASSEMBLY
1) Remove tapping screw 4x18 and separate rear cover from motor housing. Then remove carbon brushes. (Fig. 1)
2) Unscrew four 4x30 tapping screws and remove the assembled unit of gear housing and armature. (Fig. 1)
Fig. 1
Tapping screw 4x30 (4 pcs) Gear housing cover Carbon brush (2 pcs)
Rear cover
Gear housing Motor housing Tapping screw 4x18
3) Pull off the assembled unit of armature and gear housing cover from gear housing.
4) Grip armature securely by hand, then remove hex nut M6 by turning counterclockwise with wrench 10. (Fig. 2)
5) Remove spiral bevel gear 10 by hand. (Fig. 3) If it is difficult to remove by hand, remove as described below:
1. First, lubricate the gear with spray lubricant.
2. Cover the gear with cloth.
3. Then grip the gear covered with cloth using water pump pliers, and turn it.
6) Remove armature from gear housing cover with Gear Extractor, large (No.1R045).
Fig. 2 Fig. 3
Hex nut M6
Spiral bevel gear 10
Wrench 10
P 8 / 13
Repair
[3] -1. Replacing Armature and Spiral Bevel Gear 10 (cont.)
ASSEMBLY
Do the reverse of the disassembling steps.
Note: Use arbor press and Bearing Setting Plate when fitting ball bearing 629LLB in gear housing cover. (Fig. 4)
Important: Assemble gear housing to motor housing so that switch lever can be operated with right thumb
as illustrated in Fig. 5.
Fig. 4 Fig. 5
[View from rear cover side]
Ball bearing Gear housing Power supply cord
629LLB cover
Switch lever
Rear cover
Tapping screw 4x18
Bearing Spindle
setting plate (Wheel)
[3] -2. Replacing Spiral Bevel Gear 37 and Ball Bearing 6201DDW
DISASSEMBLY
1) Remove bearing box from gear housing by unscrewing four M4x14 pan head screws.
2) Remove retaining ring S-12 and wave washer 12 from spindle with Retaining Ring S and R Pliers (No.1R291).
3) Spiral bevel gear 37 can now be removed by hand. Then remove woodruff key 4. (Fig. 6)
4) Remove spindle using Gear Extractor, large (No.1R045). Now labyrinth ring can be removed. (Fig. 12)
Fig. 6 Fig. 7
Spiral bevel gear 37 Gear Extractor, large (No.1R045)
Woodruff key 4
Labyrinth ring
Bearing box Spindle
5) Remove retaining ring R-32 from bearing box Fig. 8
with Retaining Ring S and R Pliers (No.1R291).
6) By striking bearing box against the surface of
a work table, ball bearing 6201DDW and flat Bearing box
washer 12 can be removed from bearing box
as illustrated in Fig. 8.
If it is difficult to remove the ball bearing,
remove using arbor press.
Flat washer 12
Ball bearing
6201DDW
P 9 / 13
Repair
[3] -2. Replacing Spiral Bevel Gear 37 and Ball Bearing 6201DDW (cont.)
ASSEMBLY
Do the reverse of disassembling steps.
Important: Do not to forget to install labyrinth ring because it prevents dust from entering into bearing box. (Fig. 9)
How to fit retaining ring S-12 in place
See Fig. 10.
After installing spiral bevel gear37 and wave washer 12 on spindle;
1) Put retaining ring S-12 on Retaining Ring Setting Jig (No.1R343) from the tapered end of the jig.
2) Put the jig onto spindle, then put Bearing Setting Pipe 20-12.2 (No.1R028) over the jig.
3) Using arbor press, press down the pipe till the retaining ring is securely fitted in place on the spindle with a snap.
Fig. 9 Fig. 10
Labyrinth ring No.1R028
Spindle
Retaining
Retaining
ring S-12
ring S-12
No.1R343
Bearing box
[3] -3. Disassembling/Assembling Shaft Lock Mechanism
DISASSEMBLY
1) Remove bearing box from gear housing. Fig. 11
2) Pull off shoulder pin 4 with pliers while pushing pin cap with
finger. (Fig. 11) Shoulder pin 4 Gear housing
Note: Do not pull off shoulder pin 4 without holding pin cap because
compression spring 8 would sling pin cap.
Compression
ASSEMBLY spring 8
Push shoulder pin 4 through gear housing and compression spring 8
into pin cap.
Note: Do not reuse removed pin cap because removal of shoulder
pin 4 damages the inside surface of pin cap, producing plastic Pin cap
dust. Therefore, be sure to use a new pin cap for replacement
and to remove all the plastic dust on shoulder pin 4.
[3] -4. Tightening Tapping Screws That Fasten the Field
Tighten the two tapping screws that fasten baffle plate and field to the recommended torque of 1.1 - 1.3 Nm.
P 10/ 13
Circuit diagram
Color index of lead wires' sheath
Black
White
Clear
Earth terminal (Ground terminal)
of the lead wire from noise suppressor
Noise suppressor*
Brush holder A
Field Power supply
cord
Switch
Brush holder B
*Some countries do not use noise suppressor
Brush holder A
Brush holder B
P 11/ 13
Wiring diagram
[1] Connecting Lead Wires of Power Supply Cord with Switch
Connect the lead wires with switch as illustrated in Fig. 12.
Fig. 12
[When Spacer is used] [When Spacer is not used]
Power supply cord
Switch button
Switch
Spacer
[2] Wiring of Field Lead Wires in the Rear of Motor Housing
[2] -1. Rear End
Route the field lead wires as illustrated in Fig. 13 - 16.
Fig. 13
[Lead Wires of Field]
Lead wire (black) [Motor Housing with Field]
(view from the rear cover side)
Earth terminal of the lead wire Connect to brush
(clear) from noise suppressor* holder A.
is connected to this portion.
Field
Brush holder A
Lead wire
(black)
Lead wire (white)
Switch lever Lead wire (white)
Lead wire (black)
Connect to
Connect to brush switch terminals.
holder B.
Brush holder B Spindle
*Some countries do not use noise suppressor.
P 12/ 13
Wiring diagram
[2] Wiring of Field Lead Wires in the Rear of Motor Housing (cont.)
[2] -2. Right Side and Bottom
Fig. 14
Right side view
Boss A Boss A
Bottom view
Route the lead wire of power supply cord
to the switch terminal No.2 so that it goes
around the boss A.
Boss A Boss A
Switch Switch
Noise suppressor*
Field lead wires (white)
Motor housing
Field lead wire (black)
Be sure that field lead wires
are tight in motor housing.
*Some countries do not use noise suppressor.
P 13/ 13
Wiring diagram
[2] Wiring of Field Lead Wires in the Rear of Motor Housing (cont.)
[2] -3. Left Side
Fig. 15
Earth terminal of the lead wire
(clear) from noise suppressor*
is connected to this portion.
Left side view
Be sure that field lead wires
are tight in motor housing.
*Some countries do not use noise suppressor.
[2] -4. Top
Fig. 16
Earth terminal of the lead wire
(clear) from noise suppressor*
is connected to this portion.
Noise suppressor*
Top view
Put sensormatic tag**
in this space.
Sensormatic tag
(anti-theft tag)
*Some countries do not use noise suppressor.
**Some countries do not use sensormatic tag.