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The subject models are cordless angle grinders powered by 18V Li-ion battery,

and equipped with highly enhanced Brushless DC motor compared to the current 

models DGA402/ DGA452.

A built-in controller changes the cutting speed automatically according to load condition, 

enabling users to obtain high speed rotation on light duty application/ high torque on 

heavy duty application.

Models No.

 Description

PRODUCT

T

ECHNICAL INFORMATION

C

ONCEPT AND MAIN APPLICATIONS

 

S

pecification

S

tandard equipment

O

ptional accessories

P 1/ 14

Dimensions: mm (")

DGA404

All

Width (W)

DGA454

Length (L)

*1

362 (14-1/4) 

117 (4-5/8) 
130 (5-1/8) 

DGA504

DGA404

Height (H)

140 (5-1/2) 
140 (5-1/2) 

DGA454, 

DGA504

145 (5-3/4) 

Note:

 The standard equipment may vary by country or model variation.

DGA404, DGA454, DGA504
18V Cordless Angle Grinders

L

H

W

Specification

Model DGA404

18

Weight according to

EPTA-Procedure 01/2003: kg(lbs)*

2

2.5 (5.5) 2.5 (5.6)

2.4 (5.3)

Battery

1.5, 2.0, 3.0, 4.0, 5.0

Capacity: Ah

Voltage: V

Li-ion

Cell

Energy capacity: W

27, 36, 54, 72, 90

Charging time (approx.): min. 15, 18, 22, 36, 45 with DC18RC

Wheel size: mm (") Hole diameter

6 (1/4)

Max. thickness

Diameter

100 (4)

16 (5/8)

22.23 (7/8)

8,500

No

Yes
Yes

Yes
Yes
Yes

No load speed: min.ֿ ¹= rpm

Slide

Switch type

Electronic  control

Overload warning lamp
Electronic current limiter
Soft start

Anti-restart function

Battery fuel gauge
Soft grip

*2 

With 3.0Ah battery

*1 

With BL1830/ BL1840/ BL1850

Note

: BL1815 is not compatible.

DGA504

 DGA454

 115 (4-1/2)   125 (5) 

Lock nut wrench  ............................................ 1

Side grip ......................................................... 1

Depressed center grinding wheel ................... 1 (100mm for DGA404, 115mm for DGA454, 125mm for DGA504)

Battery cover .................................................. 1 (except -Z- model)

Plastic carrying case ....................................... 1 (except -Z- model)

Charger DC18RC ........................................... 1 (except -Z- model)

Li-ion battery BL1830 or BL1840 ................. 2 (except -Z- model)

Depressed center wheels

Rubber pads

Abrasive discs

Wire brushes

Diamond wheels

Abrasive cut off wheels

Toolless wheel covers

Sanding lock nuts

Fast charger DC18RC

Fast charger DC18SD

Charger DC24SC

Automotive charger DC18SE

Four port multi charger DC18SF

Li-ion battery BL1815N

Li-ion battery BL1820

Li-ion battery BL1830

Li-ion battery BL1840

Li-ion battery BL1850

OFFICIAL USE 

for ASC & Sales Shop

Summary of Contents for DGA404

Page 1: ...ion Cell Energy capacity W 27 36 54 72 90 Charging time approx min 15 18 22 36 45 with DC18RC Wheel size mm Hole diameter 6 1 4 Max thickness Diameter 100 4 16 5 8 22 23 7 8 8 500 No Yes Yes Yes Yes...

Page 2: ...gear 37 1R291 Retaining ring S and R pliers removing Retaining ring R 32 Round bar for arbor 12 50 removing Ball bearing 629LLB 1R286 Round bar for arbor 6 50 removing Spiral bevel gear 37 1R280 Beari...

Page 3: ...embled part of Gear housing and Bearing box from Gear housing cover While holding Rotor by a gloved hand turn M6 Hex nut counter clockwise with a Wrench 10 Wrench 10 M6 Hex nut Rotor Rotor Gear housin...

Page 4: ...cover and Rotor section Figs 6 and 7 1R286 Arbor press Ball bearing 629LLB Ball bearing 607LLB 1R269 Rotor When handling or storing multiple Rotors be sure to keep a proper distance between Rotors as...

Page 5: ...groove of Gear housing cover and Spindle toward the opposite of Switch knob Fig 12 Assemble by reversing the disassembly procedure Note Be careful about the points shown in Figs 10 11 and 12 Gear hous...

Page 6: ...ng Note When Spindle is removed from Spiral bevel gear 37 Ball bearing 6201DDW has a damage during the removal process Therefore replace Ball bearing 6201DDW with a new one Spindle Labyrinth ring M4x1...

Page 7: ...DISASSEMBLY ASSEMBLY 3 2 Spiral bevel gear 37 Ball bearing 696ZZ and Ball bearing 6201DDW cont 3 3 Shaft lock section 1R029 Bearing box Spiral bevel gear 37 Spindle 1R034 Arbor press Apply 1R268 to S...

Page 8: ...ating cavity in Stator complete Mating cavity on the left side and the right side Two each Projection in Housing on the left side and the right side Two each Stator complete Be sure to align the cente...

Page 9: ...ns on the triangle corners of Switch lever 3 DISASSEMBLY ASSEMBLY 3 5 Assembling of Switch knob and Switch lever Switch lever Switch knob The ends of Torsion spring 2 must be placed on these positions...

Page 10: ...one end of Torsion spring 2 on the rib of Housing L See below for the detail The other end of Pin 2 should be inserted into the hole of Housing R Place the top projection on the reverse side of Switch...

Page 11: ...WG Tape Controller The orange lead wire end from Controller can be connected to either or The one white lead wire end must be connected to either or together with the orange lead wire end and then the...

Page 12: ...ve a lock structure before disassembly as follows Find the projection on flag straight terminals Swing flag straight terminals slightly and gently to feel a little backlash due to the lock structure N...

Page 13: ...nical problem happens Identify the mechanical problem and repair or replace the part s Locate the incomplete connection and repair or replace them Controller is broken Replace Stator complete Switch i...

Page 14: ...to Minus terminal of Battery terminal Fig D 7 Note Be careful not to revere them The reverse attachment could spoil the test 4 Wait until the Tester shows the value without fluctuation There is no fau...

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