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T ECHNICAL INFORMATION
Models No. 9553NB, 9554NB, 9555NB
PRODUCT
P 1 / 12
Description Angle Grinders 100/115/125mm (4/ 4-1/2/ 5") L
CONCEPT AND MAIN APPLICATIONS
The 9553NB series models have been developed as upgraded
sister tools of the current 9523NB series models. H
Features more powerful motor for higher performance efficiency, W
yet still having the same compact and lightweight body for
comfortable handling as the current series models.
Dimensions: mm (")
Model No. 9553NB 9554NB 9555NB
Length (L) 258 (10-1/8)
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 6.8 50 / 60 710 420 800
120 6.0 50 / 60 710 420 800
220 3.4 50 / 60 710 420 800
230 3.2 50 / 60 710 420 800
240 3.1 50 / 60 710 420 800
Model No. 9553NB 9554NB 9555NB
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 10,000
Spindle thread M10x1.5/ M10x1.25 DIN/ 5/8"-UNC
Cord length: m (ft) 2.5 (8.2)
Net weight: kg (lbs) 1.4 (3.1)
Standard equipment
9553NB 9554NB 9555NB
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
9553NB 9554NB 9555NB
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 / 12
Features and benefits
Compact Design * Labyrinth Construction
*
High Dust-Proof Motor
Protects All Ball Bearings
Features the same compactness as the Armature coated with protective
9523NB series models. Weighs only zigzag varnish, and Field coated from Dust and Debris.
1.4kg (3.1lbs) with an overall length with powder varnish protects motor
of merely 258mm (10-1/8"). 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 Power Input of 710W
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 9556NB 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 9553NB in heat-resistance performance.
120
Makita 9523NB
100
80 Competitor A Mod. A1
Temperature
(degree C)
60
40
20 Makita 9553NB
0
0 5 10 15 20 25 30
Time (min.)
P 3 / 12
Comparison of products
[1] 9553NB and 9555NB
100mm (4") 125mm (5")
Model No.
Makita Competitor A Makita
Specifications 9553NB 9523NB/ H A1 9555NB 9525NB
100 100 100 125 125
Diameter
Wheel size: (4) (4) (4) (5) (5)
mm (") 16 16 16 22.23 22.23
Hole diameter
(5/8) (5/8) (5/8) (7/8) (7/8)
Continuous rating input: W 710 540 670 710 540
Rated amperage for USA: A 6 5 N/A 6 5
Max. output: W 800 630 600* 800 630
-1
No load speed: min = rpm 11,000 11,000 11,000 10,000 10,000
AC/DC switch for USA No No --- No No
53 x 63 55 x 64 53 x 62 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 2-7/16) (2-1/16 x 2-1/2) (2-3/16 x 2-1/2)
Circumference of 195 195 194 195 195
grip portion: mm (") (7-5/8) (7-5/8) (7-5/8) (7-5/8) (7-5/8)
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)
258 256 260 258 256
Length: mm (")
(10-1/8) (10-1/8) (10-1/4) (10-1/8) (10-1/8)
Dimensions
118 118 117 139 139
Width: mm (")
(4-5/8) (4-5/8) (4-5/8) (5-1/2) (5-1/2)
97 111 96 106 111
Height: mm (")
(3-13/16) (4-3/8) (3-3/4) (4-3/16) (4-3/8)
Net weight: Kg (lbs) 1.4 (3.1) 1.4 (3.1) 1.4 (3.1) 1.4 (3.1) 1.4 (3.1)
Side Grip Yes Yes Yes Yes Yes
Standard
equipment Lock nut wrench Yes Yes Yes Yes Yes
Wheel Yes Yes Yes Yes Yes
*Actual wattage of high voltage machine measured by us
P 4 / 12
Comparison of products
[2] 9554NB
115mm (4-1/2")
Model No.
Makita Makita Competitor A
Specifications 9554NB 9524NB A2
115 115 115
Diameter
Wheel size: (4-1/2) (4-1/2) (4-1/2)
mm (") 22.23 22.23 22.23
Hole diameter
(7/8) (7/8) (7/8)
Continuous rating input: W 710 540 N/A
Rated amperage for USA: A 6 5 6
Max. output: W 800 630 700*
-1
No load speed: min = rpm 10,000 11,000 11,000
AC/DC switch for USA No No No
53 x 63 55 x 64 53 x 62
Size of grip portion: mm (")
(2-1/16 x 2-1/2) (2-3/16 x 2-1/2) (2-1/16 x 2-7/16)
Circumference of 195 195 194
grip portion: mm (") (7-5/8) (7-5/8) (7-5/8)
Double insulation Yes Yes Yes
Cord length: m (ft) 2.5 (8.2) 2.5 (8.2) ---
258 256 260
Length: mm (")
(10-1/8) (10-1/8) (10-1/4)
Dimensions
129 129 131
Width: mm (")
(5-1/8) (5-1/8) (5-5/8)
106 111 100
Height: mm (")
(4-3/16) (4-3/8) (3-15/16)
Net weight: Kg (lbs) 1.4 (3.1) 1.4 (3.1) 1.7 (3.75)
Side Grip Yes Yes Yes
Standard
equipment Lock nut wrench Yes Yes Yes
Wheel Yes Yes Yes
*Actual wattage of low voltage machine measured by us
P 5 / 12
Comparison of products
Performance Comparison of Cutting/ Grinding
Models Tested for Comparison: Makita 9553NB and 9523NB, Competitor A's Model A1
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 Model A1
is indexed at 100.
[at a depth of 10mm] [at a depth of 20mm]
Slow Fast Slow Fast
Makita 9553NB 130 115
impossible to cut because of
Makita 9523NB 95
rapid temperature rise in the field
Competitor A Mod. A1 100 100
0 50 100 150 0 50 100 150
Remarks:
1) At a depth of 10mm, Makita 9553NB cut the test material smoothly, providing a strong impression that the wheel
was always touching the test material.
2) On Makita 9523NB and the competitor A's Model A1, the wheel often wobbled. 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 Model A1
is indexed at 100.
[Amount of the material removed]
little Much
Makita 9553NB 95
Makita 9523NB 90
Competitor A Mod. A1 100
0 50 100 150
Remarks:
1) The performance of Makita 9553NB was almost equal to that of the competitor A's Model A1.
2) Makita 9553NB ground the test material smoothly, providing a strong impression that the wheel was always
touching the test material.
3) On Makita 9523NB and the competitor A's Model A1, the wheel often wobbled. resulting in rather uncomfortable
operation.
P 6 / 12
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 Small Spiral Bevel Gear
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 small spiral bevel gear 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
Small spiral bevel gear
*Spiral bevel gear 10
for 9554NB, 9555NB
*Spiral bevel gear 11
for 9553NB
Wrench 10
P 7 / 12
Repair
[3] -1. Replacing Armature and Small Spiral Bevel Gear (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 Large Spiral Bevel Gear 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) Large spiral bevel gear 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
Large spiral bevel gear Gear Extractor, large (No.1R045)
*Spiral bevel gear 36
for 9553NB
*Spiral bevel gear 37
for 9554NB, 9555NB
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 8 / 12
Repair
[3] -2. Replacing Large Spiral Bevel Gear 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 large spiral bevel gear 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 9 / 12
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 10/ 12
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 11/ 12
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 12/ 12
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.