Makita HR2021 Technical Information
20mm (3/4") rotary hammer
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Also See for HR2021:
- Instruction manual (52 pages) ,
- Instruction manual (24 pages) ,
- Instruction manual (10 pages)
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Instruction Manual
T
ECHNICAL INFORMATION
Model No.
Description
C
ONCEPT AND MAIN APPLICATIONS
The above models are 20mm(3/4") version of HR2440 series
rotary hammer. Their performances are much better than competitors
in both drilling and hammer drilling.
Specifications for each new model are;
HR2020: with variable switch and reverse switch
HR2021: with variable switch, without reverse switch
HR2022: with single speed switch, without reverse switch
S
pecification
Voltage (V)
110
120
220
230
240
Model No.
No load speed : (min
Blows per min : (min
Type of bit shank
Chuck ability
Drilling
capacity : mm ( " )
Single blow energy ( J )
Working mode
Variable switch
Clutch for protecting user from lock of bit
Reverse switch
Protection from electric shock
Cord length : m (ft)
Net weight : kg (lbs)
< Note > When using wet type dia. core, employ HR2020 series models connecting with residual current device.
S
tandard equipment
* Side grip .................................. 1 pc.
* Stopper pole (Depth gauge) .... 1 pc.
< Note > The standard equipment for the tool shown may differ from country to country.
O
ptional accessories
* SDS plus TCT. bits 5.5mm(7/32") - 20mm(3/4")
* Drill chuck assembly
* Chuck adapter
* Chuck key S-13
* Drill chuck S-13
* Holder driver
* Dust cups 5 and 9
HR2020, HR2021, HR2022
20mm (3/4") Rotary Hammer
Cycle (Hz)
Current (A)
6.8
50 / 60
6.1
50 / 60
50 / 60
3.4
50 / 60
3.2
50 / 60
3.1
= rpm)
-1
= bpm).
-1
Steel
Wood
TCT. hammer bit
Concrete
Core bit
Diamond
Wet
Dry
core
Dimensions: mm (")
Length (L)
Width (W)
Height (H)
Continuous Rating (W)
Input
710
710
710
710
710
HR2020
0 - 1,050
0 - 4,050
2 modes
Yes
Yes
Yes
* Plastic carrying case ............... 1 pc.
* Safety goggle
* Bit grease
* Blow out bulb
* Core bits 32mm, 45mm, 54mm * Water protection collar
* Core bit
* Core bit adapter
* Rod
L
W
352 (13-7/8)
72 (2-13/16)
204 (8)
Max. Output(W)
Output
340
340
340
340
340
HR2021
SDS - plus
10 (3/8)
13 (1/2
32 (1-1/4)
20 (3/4)
54 (2-1/8)
65 (2-9/16)
65 (2-9/16)
2.2
rotation
rotation+percussion
Yes
Yes
No
by double insulation
4(13.1)
2.3 (5.1)
* Dust extractor attachment
* Diamond core bits (wet and dry)
32mm, 38mm, 54mm, 65mm
* Various taper shank TCT. bits
* Taper shank adapter
* Cotter
PRODUCT
P 1 / 18
H
600
600
600
600
600
HR2022
1,050
4,050
No
Yes
No
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Summary of Contents for Makita HR2021
- Page 1 Specifications for each new model are; HR2020: with variable switch and reverse switch Dimensions: mm (") HR2021: with variable switch, without reverse switch Length (L) 352 (13-7/8) HR2022: with single speed switch, without reverse switch...
- Page 2 < 1 > Lubrication Apply the following MAKITA grease to protect parts and product from unusual abrasion. * Grease RA No.1(Brown) to the portions marked with black triangle * Grease FA No.2 to the portions marked with gray triangle...
- Page 3 P 3 / 18 epair < 2 > Disassembling chuck section 1. Slide chuck cover in the direction of gear housing, and pull out cap 35 by turning. See Fig. 1. 2. Take off ring spring 19. Then, the following parts can be disassembled from tool holder. See Fig. 1A. * Chuck cover * Ring 21 3.
- Page 4 P 4 / 18 epair < 4 > Disassembling change lever 1. Disassemble cap from change lever by twisting the flat head screwdriver inserted between cap and change lever, as illustrated in Fig. 2. 2. Turn the change lever fully to the direction of rotary hammer mode and pull off change lever from gear housing as illustrated in Fig 2A.
- Page 5 P 5 / 18 epair < 7> Disassembling tool holder section 1. Disassemble change lever from gear housing as mentioned in < 4 > Disassembling change lever at page 4. 2. Separate gear housing from motor housing as illustrated in Fig. 3 and Fig. 3A. And disassemble armature as illustrated in Fig.
- Page 6 P 6 / 18 epair < 9 > Disassembling impact bolt 1. Referring to "< 7 > Disassembling tool holder section" at page 5, disassemble ring spring 28, washer 30, compression spring 31 and spur gear 51 from tool holder. See Fig. 4, Fig. 4A, 4B, 4C, D and 4E. 2.
- Page 7 P 7 / 18 epair 4. Insert "No.1R236 Round bar for arbor" and push ring spring 28 as deep as possible to the inner housing side by striking the round bar for arbor as illustrated in Fig. 5D. 5. Pick up ring spring 28 with plier and take off it from tool holder as illustrated in Fig. 5E. 6.
- Page 8 P 8 / 18 epair < 11 > Disassembling swash bearing 1. Referring to Fig. 3, 3A, 3B at page 4, disassemble the product. And separate inner housing together with tool holder section and swash bearing section from gear housing as illustrated in Fig.
- Page 9 P 9 / 18 epair 6. Swash bearing section can not be disassembled in one action by pressing cam shaft with arbor press, because Take the following steps for disassembling them. 1. Disassemble ring 8 by pressing with arbor press as illustrated in Fig. 9. 2.
- Page 10 P 10 / 18 epair <12> Assembling swash bearing section 1. Apply grease to the parts of swash bearing section referring to < 1 > Lubrication at page 2. 2. Assemble ball bearing 606ZZ by pressing spur gear 10 with arbor press as illustrated in Fig. 10. 3.
- Page 11 <13> Assembling swash bearing section to piston cylinder 1. Apply MAKITA grease to piston cylinder and swash bearing 10 referring to <1> Lubrication at page 2. 2. Assemble 2 pcs. of flat washers 12 and piston joint to piston cylinder as illustrated in Fig. 11.
- Page 12 < 15 > Assembling needle bearing complete 1. Apply MAKITA grease RA No.1 to the inside of needle baring complete. 2. Putting needle bearing complete on No.1R165 "Ring spring setting tool B" press gear housing onto the needle bearing complete with arbor press as illustrated in Fig. 13.
- Page 13 P 13 / 18 ircuit diagram Model HR2020 with reverse switch, without choke coil for radio interference suppression Brush holder Brush holder Color index of lead wires Black White Blue See-through Connected to field ore Switch C1 C2 Noise suppressor Power supply cord For some countries, noise suppressor of two lead wire type is used, or noise suppressor is not used.
-
Page 14: Circuit Diagram
Noise suppressor For some countries, noise suppressor of two lead wire type is used, or noise suppressor is not used. Model HR2021, HR2022 for 230- 240V without reverse switch, with choke coil for radio interference suppression Color index of lead wires... - Page 15 P 15 / 18 iring diagram Model HR2020 with reverse switch, without choke coil for radio interference suppression Fix field lead wire (black) with lead holder as per Fix field lead wire (black) the illustration. with lead holder as per the illustration.
-
Page 16: Wiring Diagram
P 16 / 18 iring diagram Model HR2020 for 230 - 240V with reverse switch and choke coil for radio interference suppression Fix field lead wire (black) Fix choke coil's lead wires with lead holder as per (orange) with lead holder as per the illustration. - Page 17 P 17 / 18 iring diagram Model HR2021, HR2022 without reverse switch and choke coil for radio interference suppression Fix brush holder's wire (red) with lead holder as per Fix field lead wire (black) the illustration. with lead holder as per the illustration.
- Page 18 P 18 / 18 iring diagram Model HR2021, HR2022 without reverse switch, with choke coil for radio interference suppression Fix field lead wire (black) Fix choke coil's lead wires (black with lead holder as per and blue) with lead holder as per the illustration.