Hitachi DH 22PG Manual

PRODUCT NAME
Hitachi Rotary Hammer
Model DH 22PG
[ NEW FEATURES ]
Most compact and lightweight in its class for
ease of operation
Hitachi’s own internal pressure adjustment
mechanism
Clutch-cut type idle striking prevention
mechanism
The new Model DH 22PG features the concrete drilling capability with the maximum drill bit diameter 22 mm and
the use of SDS-plus shank tools. This is a professional-use and low-priced rotary hammer.
The main features of the Model DH 22PG are as follows:
(1) Most compact and lightweight in its class: 289 mm in overall length and 1.9 kg in weight
(2) The internal pressure adjustment mechanism prevents grease leakage.
(3) The idle striking prevention mechanism prevents reciprocating motion during no-load operation to reduce
noise.
LIST No. E497
Aug. 2007
Drilling holes in concrete, brick and stone
Drilling holes in steel and wood
Tightening and loosening machine screws and wood screws
MARKETING OBJECTIVE
APPLICATIONS
SELLING POINTS
International Sales Division
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

REMARK:
For more information about HANDLING INSTRUCTIONS, visit our website at:
http://www.hitachi-koki.com/manual_view_export/
Throughout this TECHNICAL DATA AND SERVICE MANUAL, a symbol(s) is(are) used in the place of
company name(s) and model name(s) of our competitor(s). The symbol(s) utilized here is(are) as follows:
Competitors
Symbols utilized Company name Model name
B BOSCH GBH2-22RE
C MAKITA HR2020

CONTENTS
Page
SELLING POINT DESCRIPTIONS---------------------------------------------------------------------------------------- 1
SPECIFICATIONS ------------------------------------------------------------------------------------------------------------- 2
1. Specifications----------------------------------------------------------------------------------------------------- 2
2. Optional accessories------------------------------------------------------------------------------------------- 3
COMPARISONS WITH SIMILAR PRODUCTS------------------------------------------------------------------------- 7
1. Specifications comparisons---------------------------------------------------------------------------------------------------------- 7
2. Drilling speed comparison------------------------------------------------------------------------------------- 8
PRECAUTIONS IN SALES PROMOTION------------------------------------------------------------------------------- 9
Safety Instructions-------------------------------------------------------------------------------------------------- 9
REFERENCE MATERIALS-------------------------------------------------------------------------------------------------10
1. Lubrication -------------------------------------------------------------------------------------------------------10
2. Tool structure----------------------------------------------------------------------------------------------------10
3. Changeover between ”Rotation only” and ”Rotation and hammering”----------------------------13
4. Precautions for use of ”Rotation only” (no hammering) function------------------------------------13
5. Drill bits -----------------------------------------------------------------------------------------------------------13
6. Tool retainer section -------------------------------------------------------------------------------------------14
7. Dust collector (B)-----------------------------------------------------------------------------------------------15
REPAIR GUIDE----------------------------------------------------------------------------------------------------------------16
1. Precautions in disassembly and reassembly------------------------------------------------------------16
STANDARD REPAIR TIME (UNIT) SCHEDULES--------------------------------------------------------------------26
Assembly diagram for DH 22PG

-1-
Most compact and lightweight in its class*
The Model DH 22PG is most compact and lightweight in its class thanks to the optimum striking
mechanism. HITACHI
Maker
Model DH 22PG BC
Overall
length 289 mm 342 mm 352 mm
Weight 1.9 kg 2.3 kg 2.3 kg
Internal pressure adjustment mechanism
An air passage is provided as shown below to let out air inside the gear cover and let outside air in the gear
cover. This passage is sandwiched between felt packings to pass only air. Thus variations in the internal
pressure are minimized for stable hammering operation and prevention of grease leakage.
Idle striking prevention mechanism
When the drill bit is lifted from the concrete surface, the reciprocating bearing that converts rotation into
reciprocating motion stops to prevent idle striking. Thanks to this mechanism, vibration and noise during
no-load operation are reduced.
SELLING POINT DESCRIPTIONS
289 mm
A
ir passage
(Outside the
gear cover)
Felt packing (B)
Valve
Felt packing (A)
(Inside the Gear cover)
Inner cove
r
A - A
* Based on our own research

-2-
1. Specifications
mm 22
Capacity: Concrete Inch 7/8
mm 13/24
Capacity: Steel/Wood Inch 1/2” / 1”
Input power W620
Impact energy J1.4
No-load rpm (Forward) min-1 0-1,500
No-load rpm (Reverse) min-1 0-980
Full-Load bpm min-1 0-6,200
Mode –2
Variable speed –YES
Reverse switch type –Push button
Handle No
Soft grip Gear cover No
mm 289
Overall length Inch 11-3/8”
No load vibration level
(Tri-axial, measured) m/s21.42
Full load vibration level
(Tri-axial, measured) m/s28.75
No load noise level
(measured) dB 83.7
Full load noise level
(measured) dB 89.2
kg 1.9
Weight lbs 4.2
SPECIFICATIONS

-3-
2. Optional accessories
(1) Drilling anchor holes (rotation and hammering)
Drill bit (SDS-plus shank)
Outer dia.
(mm)
Overall
length
(mm)
Effective
length
(mm) Code No. Outer dia.
(mm)
Overall
length
(mm)
Effective
length
(mm) Code No.
4.0 303571 12.5 166 100 303592
4.3 303572 12.5 260 200 303607
4.5 303573 12.7 166 100 303593
4.8 303574 12.7 260 200 303608
5.0
110 50
303575 13.0 303594
5.0 160 100 303578 14.0 303595
5.5 303576 14.3 166 100 303596
6.0 110 50 303577 14.3 260 200 303609
6.0 303579 14.5 166 100 303597
6.4 303580 14.5 260 200 303610
6.5 303581 15.0 303598
7.0 303582 16.0 166 100 303599
7.5 303583 16.0 260 200 303611
8.0 303584 16.5 303600
8.5 303585 17.0 166 100 303601
9.0 303586 17.0 260 200 308485
9.5 303587 17.5 166 100 303602
10.0
160 100
303588 17.5 260 200 303612
10.0 260 200 303604 18.0 166 100 303603
10.5 160 100 303589 19.0 260 200 303613
10.5 260 200 303605 20.0 303614
11.0 160 100 303590 22.0 250 200 303615
12.0 166 100 303591
12.0 260 200 303606
+
Effective length
Overall length

-4-
Slender bit and adapter for slender shaft (SDS-plus shank)
(1) Drill bit (slender shaft) (2) Adapter for slender shaft
Outer dia.
(mm) Overall length (mm) Effective length (mm) Code No. Code No.
3.4 306369
3.5 90 45 306368 306370
Drill bit (taper shank)
(1) Drill bit (taper shank) (2) Taper shank adapter (3) Cotter
Outer dia. (mm) Code No. Type Code No. Code No.
1100
12.3
12.7
14.3
14.5
17.5
944460
944461
993038
944462
944500
944463
Morse taper No. 1 303617 944477
13 mm hammer drill chuck
+
+
Straight-shank bit for
impact drills
Rubber cap
13 mm hammer drill chuck
(SDS-plus shank)
Chuck wrench
++
(1) Drill bit (slender shaft) (2) Adapter for slender shaft
(SDS-plus shank)
(1) Drill bit (taper shank) (2) Taper shaft adapter
(SDS-plus shank)
(3) Cotter
+
+

-5-
Code No. 303046
Part name Code No.
13 mm hammer drill chuck (including chuck wrench and rubber cap) 303332
Chuck wrench 303334
Rubber cap 303335
(2) Anchor setting
Anchor setting bar
Part name Overall
length (mm) Code No. Part name Overall length (mm) Code No.
W-1/4Anchor setting adapter-A 260 302976 W-1/4Anchor setting adapter-B 260 302979
W-5/16Anchor setting adapter-A 260 302975 W-5/16Anchor setting adapter-B 260 302978
W-3/8Anchor setting adapter-A 160 303621 W-3/8Anchor setting adapter-B 160 303622
W-3/8Anchor setting adapter-A 260 302974 W-3/8Anchor setting adapter-B 260 302977
Internal cone type External cone type
(3) Crushing operation (rotation and hammering)
(4) Drilling holes and driving screws (rotation only)
Bull point (SDS-plus shank) +
Special screw Chuck adapter (G)
(SDS-plus shank)
Chuck wrench
13 mm drill chuck
(13VLRB-D)
++
+
Anchor setting adapter
(SDS-plus shank)
NOTE:
If the tool is to be used for tightening or loosening screws,
open the three jaws of the drill chuck and securely fix the drill
chuck to chuck adapter (G) with the special screw (a left-hand
threaded M6 screw) when mounting the drill chuck onto chuc
k
adapter (G).

-6-
Part name Code No.
Chuck adapter (G) 303623
13 mm drill chuck (with chuck wrench) 321814
Special screw (M6 left-hand threaded) 981122
(1) Cross-recessed head (Phillips) bit (2) Slotted-head (minus) bit
[Overall length: 65 mm] [Overall length: 70 mm]
(For use with cross-recessed head (Phillips) screw) (For use with slotted-head (minus) screw)
Bit No. Code No. Applicable screw dia. (mm) Bit tip thickness Code No. Applicable screw
dia. (mm)
No. 2 983006 3 - 5 0.8 955659 4
No. 3 983011 6 - 8 *1 955674 5 - 6
*Temporarytightening
(5) Grease for hammer and hammer drill
(6) Dust cup and dust collector (B)
Code No. 971787 Code No. 306885
Dust cup Dust collector (B)
Containing 500 g Containing 30 g Containing 70 g
Code No. 980927 Code No. 981840 Code No. 308471
Stamped bit No. Tip thickness

-7-
(Superior specifications: )
1. Specifications comparisons
Maker HITACHI
Model name DH22PG B C
mm 22 22 20
Capacity: Concrete Inch 7/8” 7/8” 13/16”
mm 13/24 13/30 13/32
Capacity: Steel/Wood Inch 1/2” / 1” 1/2” / 1-3/16” 1/2” / 1-1/4”
Input power W 620 620 710
Impact energy J 1.4 2.2 2.2
No-load rpm (Forward) min-1 0-1,500 0-1,000 0-1,050
No-load rpm (Reverse) min-1 0-980 0-1,000 0-525
Full-load bpm min-1 0-6,200 0-4,400 0-4,050
Mode - 222
Variable speed - Yes Yes Yes
Reverse switch type - Push button CB holder Switch Lever
Handle No Yes No
Soft grip Gear
cover No No No
mm 289 342 352
Overall length Inch 11-3/8” 11-15/32” 13-55/64”
No-load vibration level
(Tri-axial, measured) m/s21.42 12.4 8.7
Full-l load vibration level
(Tri-axial, measured) m/s28.75 16.8 16.2
No-l load noise level
(measured) dB 83.7 91.3 87.7
Full-l Load noise level
(measured) dB 89.2 87.1 85.0
kg 1.9 2.3 2.3
Weight lbs 4.2 5.1 5.1
Internal pressure
adjustment mechanism
- Yes No No
No-load hammering
prevention mechanism
- Yes No No
COMPARISONS WITH SIMILAR PRODUCTS