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Continuous Rating (W)

Voltage (V)

Cycle (Hz)

Input

Output

Max. Output(W)

110
120

220
230
240

6.8
6.1

3.4
3.2
3.1

50 / 60
50 / 60
50 / 60
50 / 60
50 / 60

710
710

710
710
710

340
340

340
340
340

600
600

600
600
600

Model No.

 Description

PRODUCT

Current (A)

T

ECHNICAL INFORMATION

C

ONCEPT AND MAIN APPLICATIONS

 

S

pecification

S

tandard equipment

O

ptional accessories

< Note >  The standard equipment for the tool shown may differ from country to country.

P 1 / 18

Dimensions: mm (")

Length (L)

Height (H)

352 (13-7/8)

72 (2-13/16)

204 (8)

Width (W)

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

L

W

H

HR2020,  HR2021,  HR2022

20mm (3/4") Rotary Hammer

Model No.

HR2020

HR2021

HR2022

No load speed : (min 

-1

= rpm)

Blows per min : (min 

-1

= bpm).

Type of bit shank

Drilling 
capacity : mm ( " )

Steel

Wood

Concrete

TCT. hammer bit

Core bit

Wet

Dry

Diamond 

core

Single blow energy ( J )

Working mode

Variable switch

Reverse switch

Clutch for protecting user from lock of bit

Cord length :  m (ft)

Net weight :  kg (lbs)

< Note > When using wet type dia. core, employ HR2020 series models connecting with residual current device.

Protection from electric shock

rotation

rpercussion

SDS - plus

0 - 1,050

1,050

0 - 4,050

4,050

13 (1/2
32 (1-1/4) 
20 (3/4)

54 (2-1/8) 
65 (2-9/16)
65 (2-9/16)

2.2

Yes
Yes

Yes

Yes

No

No

No

Yes

by double insulation

4(13.1)

2.3 (5.1)

Chuck ability

10 (3/8)

Yes

2 modes

* Side grip .................................. 1 pc.                      * Plastic carrying case ...............  1 pc.
* Stopper pole (Depth gauge) .... 1 pc.

* SDS plus TCT. bits 5.5mm(7/32") - 20mm(3/4")            * Safety goggle              * Dust extractor attachment
* Drill chuck assembly                                                       * Bit grease                    * Diamond core bits (wet and dry)
* Chuck adapter                                                                  * Blow out bulb                     32mm, 38mm, 54mm, 65mm
* Chuck key S-13                                             * Core bits 32mm, 45mm, 54mm    * Water protection collar
* Drill chuck S-13                                            * Core bit                                         * Various taper shank TCT. bits
* Holder driver                                                 * Core bit adapter                             * Taper shank adapter
* Dust cups 5 and 9                                          * Rod                                                * Cotter

Summary of Contents for HR2021

Page 1: ...21 HR2022 No load speed min 1 rpm Blows per min min 1 bpm Type of bit shank Drilling capacity mm Steel Wood Concrete TCT hammer bit Core bit Wet Dry Diamond core Single blow energy J Working mode Variable switch Reverse switch Clutch for protecting user from lock of bit Cord length m ft Net weight kg lbs Note When using wet type dia core employ HR2020 series models connecting with residual current...

Page 2: ... portion where contacts piston cylinder The portion where contacts inner housing Inner portion where contacts striker The portion where piston joint is assembled Inner portion where contacts tool holder The groove where O ring 68 is assembled Inner portion where contacts cam shaft The surface where contacts helical gear 26 The portion where balls are installed Convex portion of cam Spline portion ...

Page 3: ...r 3 Assembling chuck section 1 Apply grease to steel ball 7 0 and cap 35 referring to 1 Lubrication at page 2 2 Assemble conical compression spring 21 29 and guide washer and hold guide washer with steel ball 7 0 See Fig 1B and Fig 1A 3 Assemble ring 21 and chuck cover to tool holder And then hold them with ring spring 19 See Fig 1A 4 Slide chuck cover in the direction of gear housing and assemble...

Page 4: ...ng to the assembling hole as illustrated in the above Fig 2A And assemble cap by pressing to change lever 6 Disassembling armature 1 Disassemble handle cover by unscrewing tapping screw 4 x 25 And disassemble carbon brushes as illustrated in Fig 3 2 Separate gear housing together with armature from motor housing by unscrewing tapping screws 4 x 45 as illustrated in Fig 3A 3 Slightly hitting the ed...

Page 5: ...g 4B 6 Disassemble ring spring 28 with retaining ring plier pressing washer 30 down to the spur gear 51 side as illustrated in Fig 4C and Fig 4D 7 Disassemble washer 30 compression spring 31 and spur gear 51 from tool holder as illustrated in Fig 5E Fig 4B Fig 4E Fig 4C Fig 4D Washer 30 Spur gear 51 Compression spring 31 Washer 30 Round bars for arbor Ring spring 28 Retaining ring plier Retaining ...

Page 6: ...ts cut portion Ring spring Push the cut portion to the out side of the hole Push out ring spring 28 from the inner groove O ring case O ring case Fig 5 Fig 5A Inner housing side Inner housing side Cap 35 side Cap 35 side 3 Hold tool holder with No 1R038 Armature holder and vise as illustrated in Fig 5B Insert screwdriver between ring spring 28 and O ring case and push out ring spring 28 from the i...

Page 7: ... 5D Fig 5E Ring spring 28 Fig 5F O ring case equipped with O ring 9 O ring 15 Ring 9 Impact bolt equipped with O ring 12 10 Assembling impact bolt 1 Apply grease to the O rings referring to 1 Lubrication at page 2 O ring 9 for O ring case O ring 15 O ring 12 for impact bolt 2 Insert impact bolt ring 9 O ring 15 and O ring case with O ring 9 into tool holder as illustrated in Fig 5F 3 Assemble ring...

Page 8: ...point And twist the the swash bearing section with pulling off them from inner housing Then swash bearing section and change plate can be disassembled from piston cylinder See Fig 8C Plastic hammer Fig 8 Fig 8A Swash bearing section Swash bearing section Tool holder section Tool holder section Flat washer 28 Inner housing Piston cylinder Washer 30 Hex socket head bolts M4x12 Fig 8B Fig 8C Piston c...

Page 9: ...ing with arbor press as illustrated in Fig 9C 1R022 Bearing extractor plate 1R023 Bearing extractor ring Ring 8 Ring 8 1R236 Round bar for arbor 1R236 Round bar for arbor Ball bearing 608ZZ Ball bearing 606ZZ Flat washer 8 Bearing retainer Helical gear 26 Swash bearing 10 Clutch cam Fig 9 Fig 9A Fig 9B Fig 9C Fig 9D Fig 9E 5 After disassembling helical gear 26 swash bearing 10 clutch cam compressi...

Page 10: ...Fig 10B 5 Assemble flat washer 8 and bearing retainer And then assembled ball bearing 608ZZ by pressing with arbor press as illustrated in Fig 10C 6 Assemble ring 8 by pressing with arbor press as illustrated in Fig 10D Align the splines of clutch cam and swash bearing with the same of spur gear 10 when setting them to spur gear 10 Ball bearing 606ZZ Spur gear 10 Fig 10 Fig 10A Fig 10C Fig 10D Hel...

Page 11: ...10 assemble swash bearing 10 to piston cylinder by inserting its pole into the hole of piston joint as illustrated in Fig 11B 5 Fasten bearing retainer which has been assembled to swash bearing section in the step of Fig 10C with adhesive hex socket head bolt M4 x 12 onto inner housing as illustrated in Fig 11C Fig 11 Note Do not fasten with the used hex socket head bolt M4 x 12 Always use the fre...

Page 12: ...ewing 2 pcs of tapping screws 4x18 as illustrated in Fig 14 Then switch noise suppressor power supply cord etc can be replaced No 1R165 Ring spring setting tool B Needle bearing complete Gear housing Note in assembling Pay attention to the assembling position of needle bearing complete The fat portion of needle bearing complete has to be faced to the belly side of gear housing Fig 13 Belly side Ne...

Page 13: ...supply cord Brush holder Brush holder Connected to field ore For some countries noise suppressor of two lead wire type is used or noise suppressor is not used 1 2 3 4 1 2 C1 C2 M1 Noise suppressor M2 Switch Power supply cord Brush holder Brush holder Connected to field ore For some countries noise suppressor of two lead wire type is used or noise suppressor is not used Orange Choke coil Model HR20...

Page 14: ...lor index of lead wires Black White Red Blue See through Color index of lead wires Black Red Blue See through Noise suppressor Power supply cord Brush holder Brush holder Connected to field ore 1 2 C1 C2 M1 M2 Switch Noise suppressor Power supply cord Brush holder Brush holder Connected to field ore For some countries noise suppressor of two lead wire type is used or noise suppressor is not used 1...

Page 15: ...d field lead wire black with lead holder as per the illustration Pass brush holder s lead wire blue under the field lead wire black Do not slack brush holder s lead wire blue between brush holder and lead holder Fix brush holder s lead wire blue and field lead wire black with lead holder as per the illustration Fix lead wires which are passed through this area with any of these lead holders Noise ...

Page 16: ...r and lead holder Fix brush holder s lead wire blue and field lead wire white with lead holder as per the illustration Pass brush holder s lead wire blue under the field lead wire white Do not slack brush holder s lead wire blue between brush holder and lead holder Fix brush holder s lead wire blue and field lead wire white with lead holder as per the illustration Fix lead wires which are passed t...

Page 17: ...holder as per the illustration Fix brush holder s lead wire red and blue with lead holder as per the illustration Pass brush holder s lead wire red under the same of blue Do not slack brush holder s lead wire red between brush holder and lead holder Fix brush holder s wire red with lead holder as per the illustration Fix noise suppressor s lead wire see through with lead holder as per the illustra...

Page 18: ...lack and blue with lead holder as per the illustration Fix brush holder s lead wire red and field lead wire black with lead holder Pass brush holder s lead wire red under the field lead wire black Do not slack brush holder s lead wire red between brush holder and lead holder Fix field lead wire black with lead holder as per the illustration Fix noise suppressor s lead wire see through with lead ho...

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