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Makita GA7020 Technical Information
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Makita GA7020 Technical Information

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T
ECHNICAL INFORMATION
Model No.
Description
C
ONCEPT AND MAIN APPLICATIONS
The above products have been developed as the successor
models to the current 9067/ 9069 series models, featuring
durability higher than the predecessors.
Also the following optional accessories will provide
more comfort and control;
*Vibration absorbing side grip for comfortable work
*Toolless wheel cover for quick adjustment
*Dust cover attachment
GA7020S and GA9020S feature soft start.
GA7021 is designed on GA7020 for low-speed and high-torque.
S
pecification
Voltage (V)
110
120
220
230
240
Model No.
Wheel size: mm (")
No load speed: min-
Soft start feature
AC/DC switch
Double insulation
Power supply cord: m (ft)
Net weight: kg (lbs)
a) Differs by country.
b) 6,000 for USA, Guam, Panama
c) Exclusively for North American countries
S
tandard equipment
Lock nut wrench 35 ......... 1 pc
Side grip 36 ...................... 1 pc
Note: The standard equipment for the tool shown above may differ by country.
O
ptional accessories
Vibration absorbing side grip
Toolless quick adjustable wheel cover
Dust cover attachment
GA7020/ GA7020S, GA7021: Assorted accessories for 180mm angle grinder
GA9020/ GA9020S: Assorted accessories for 230mm angle grinder
GA7020/ GA7020S, GA7021, GA9020/ GA9020S
Angle Grinders 180mm (7')/ 230mm (9')
Current (A)
Cycle (Hz)
15
50/ 60
15
50/ 60
10.5
50/ 60
10.1
50/ 60
9.6
50/ 60
GA7020
Diameter
Hole diameter
=rpm.
1
No
Australia, New Zealand: 2.0 (6.6), Other countries: 2.5 (8.2)
H
W
Continuous Rating (W)
Input
1,650
---
2,200
2,200
2,200
GA7020S
GA7021
180 (7)
22.23 (7/8)
8,500
Yes
No
c) Yes
Yes
4.7 (10.4)
L
Dimensions: mm (")
GA7020
Model No.
GA7020S
GA7021
Length (L)
473 (18-5/8)
Width (W)
200 (7-7/8)
Height (H)
140 (5-1/2)
Max. Output (W)
Output
1,100
2,750
1,100
2,750
1,400
3,300
1,400
3,300
1,400
3,300
GA9020
GA9020S
230 (9)
b) 6,600
No
Yes
PRODUCT
P 1 / 6
GA9020
GA9020S
249 (9-3/4)

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Summary of Contents for Makita GA7020

  • Page 1 GA7021 Length (L) 473 (18-5/8) GA7020S and GA9020S feature soft start. Width (W) 200 (7-7/8) 249 (9-3/4) GA7021 is designed on GA7020 for low-speed and high-torque. Height (H) 140 (5-1/2) pecification Continuous Rating (W) Voltage (V) Current (A) Cycle (Hz) Max.

  • Page 2: Necessary Repairing Tools

    Ring spring setting tool B Assembling Spiral bevel gear 53 [2] LUBRICATION Put approx. 60g of Makita grease SG No.1 in the gear room of Gear housing complete to protect parts and product from unusual abrasion. [3] DISASSEMBLY/ASSEMBLY Important: As listed below, different gears are used for GA7020/GA7020S and GA9020/GA9020S/GA7021, and they are not interchangeable between the models.
  • Page 3 P 3 / 6 epair [3] -1. Armature, Small spiral bevel gear, Ball bearing 6301DDW (cont.) DISASSEMBLING 5) In order to remove Ball bearing 6301DDW from gear housing complete, first remove Retaining ring R-42 with Retaining ring R pliers RT-2N (No.1R005), and remove Flat washer 20 from Gear housing complete. (Fig. 3) 6) Reassemble Armature to Gear housing complete, then the spiral bevel gear to Armature shaft.
  • Page 4 P 4 / 6 epair [3] -2. Large spiral bevel gear and Ball bearing 6203DDW Note: The gear and the ball bearing can be replaced without disassembling the Motor section. DISASSEMBLING 1) Separate Bearing box from Gear housing complete by unscrewing four M6x22 Hex socket head bolts. It is not necessary to remove Carbon brushes.

  • Page 5: Shaft Lock

    P 5 / 6 epair [3] -2. Large spiral bevel gear and Ball bearing 6203DDW (cont.) ASSEMBLING Do the reverse of the disassembling steps. How to assemble Spindle to Large spiral bevel gear See Fig. 12. 1) In order not to damage the gear teeth of Large spiral bevel gear, put it on Ring spring setting tool B (No.1R165). 2) After assembling Ball bearing 6203DDW to Bearing box, put Bearing box on Large spiral bevel gear.

  • Page 6: Circuit Diagram

    P 6 / 6 ircuit diagram Color index of lead wires' sheath *Resistor is not used for GA7020, GA7021, GA9020 Black **Noise suppressor is not used for some country. Resistor* Switch Noise suppressor** Field Power supply cord iring diagram [1] Motor Housing Route two Field lead wires (black) as illustrated below.

This manual is also suitable for:

Ga7020sGa7021Ga9020Ga9020s