Hitachi DV 12DV Technical Data And Service Manual
POWER TOOLS
TECHNICAL DATA
AND
SERVICE MANUAL
CORDLESS IMPACT DRILL
DV 12DV
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
LIST No. F852
Jul. 2001
D
MODEL
DV 12DV
Notice for use
Specifications and parts are subject to change for improvement.
Refer to Hitachi Power Tool Technical News for further information.
REMARK:
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:
Symbols Utilized
Competitors
Company Name
Model Name
DEWALT
DW912K
P
MAKITA
8412DWA
C
Page
CONTENTS
1. PRODUCT NAME........................................................................................................................... 1
2. MARKETING OBJECTIVE ............................................................................................................. 1
3. APPLICATIONS.............................................................................................................................. 1
4. SELLING POINTS .......................................................................................................................... 1
4-1. Selling Point Descriptions ............................................................................................................... 2
5. SPECIFICATIONS .......................................................................................................................... 4
6. COMPARISONS WITH SIMILAR PRODUCTS .............................................................................. 5
7. WORKING PERFORMANCE PER SINGLE CHARGE .................................................................. 6
8. PRECAUTIONS IN SALES PROMOTION ..................................................................................... 7
8-1. Safety Instructions .......................................................................................................................... 7
8-2. Inherent Drawbacks of Cordless Impact Drills Requiring Particular Attention
during Sales Promotion................................................................................................................... 9
9. REFERENCE MATERIALS ..........................................................................................................10
9-1. Speed Control Mechanism ........................................................................................................... 10
10. REPAIR GUIDE ...........................................................................................................................11
10-1. Precautions in Disassembly and Reassembly .............................................................................11
10-2. Precautions in Disassembly and Reassembly of Battery Charger ............................................. 18
11. STANDARD REPAIR TIME (UNIT) SCHEDULES...................................................................... 19
Assembly Diagram for DV 12DV
--- 1 ---
1. PRODUCT NAME
Hitachi 12 V Cordless Impact Drill, Model DV 12DV
2. MARKETING OBJECTIVE
European competitors are now preparing to have a wide selection of cordless impact drills (combination drills),
and it is expected that cordless impact drills will be the growing segment of the power tool industry.
The Model DV 12DV cordless impact drill has been newly developed as an upgraded version of the current Model
DV 10DVA. The Model DV 12DV is more powerful than the Model DV 10DVA and equipped with the T-type
handle and the 22-step clutch for easier operation as a driver drill.
3. APPLICA TIONS
Drilling into brick and concrete block
Drilling into wood, metal and plastic
Driving and loosening machine screws, wood screws and tapping screws
4. SELLING POINTS
Single-touch,
two-speed selector
Choice of three operation
modes for flexibility
Drill
Impact drill
Driver (22-step clutch)
10 mm keyless chuck with
positive lock mechanism
Variable-speed switch with brake;
electronic feedback for high efficiency
Easy-to-operate
pushbutton reverse
switch
Convenient hook
--- 2 ---
4-1. Selling Point Descriptions
4-1-1. Choice of three operation modes for flexibility
This Model can be easily switched between three modes, screwdriving, drilling and impact drilling, simply by
turning the cap dial. To use it as a screwdriver, set the cap to any position between 1 and 22, depending on the
types of screws and the material to be fastened. The clutch is then coupled to adjust the tightening force among
the corresponding 22 different levels.
In order to fasten large wood screws and drill metals, woods and plastics, align the cap drill mark
" " with the triangle mark on the main body. The clutch is then directly coupled to provide the maximum
power output. Drilling into very hard materials such as brick and concrete block can be efficiently carried out by
aligning the cap impact mark " " with the triangle mark on the main body. (See Fig. 1.)
Fig. 1
4-1-2. Variable-speed switch with brake (and electronic feedback mechanism)
The brake immediately brings the operation to a stop with a simple release of the switch lever, making the unit
most convenient for continuous screw tightening and drilling.
The variable-speed switch is able to freely control the rotation speed depending on how far the switch lever is
pulled, between 0 and 350/min. for the low speed mode and between 0 and 1,250 min. for the high speed mode.
This facilitates positional adjustment, for instance, when tightening a wood screw.
The feedback mechanism ensures a greater torque even in the lower end of the variable-speed range.
Lower torque
Cap
Higher torque
Drill mark
Impact mark
Triangle mark
--- 3 ---
4-1-3. 10 mm keyless chuck with positive lock mechanism
The handle-free keyless chuck makes replacement of bits easier. Replace the drill or driver bit simply by turning
the sleeve with one hand while holding the ring with the other. (See Fig. 2.)
The lock mechanism is provided to prevent loosening of the chuck during operation.
Fig. 2
Ring
Sleeve
Tighten
Loosen
Bit
Keyless chuck
--- 4 ---
5. SPECIFICATIONS
Main body unit (including battery)
•••••••••••••••••••••••••••••••••••••
1.9 kg (4.2 Ibs.)
Charger unit
(including cord) •••••••••••••••••••••••••••••••••••••••••••
1.4 kg (3.1 Ibs.)
Main body and standard accessories DV 12DV (SSX)
••••••
5.7 kg (12.6 Ibs.)
DV 12DV (SSK)
••••••
6.0 kg (13.2 Ibs.)
Capacity
(Low/High)
Keyless chuck
(13VLR-N)
Rotation speed (No-load)
Type of motor
Torque
Type of switch
Handle configuration
Enclosure
Battery
(
Type FEB12S
)
Charger
(Model UC 12SD)
Weight
Standard
accessories
Drilling Brick
••••••••••••••••••••••
10 mm (3/8")/10 mm (3/8") [Depth 30 mm (1-3/16")]
Metal
••••••
Mild steel
10 mm (3/8")/6.5 mm (1/4") [Thickness 1.6 mm (1/16")]
Aluminum
10 mm (3/8")/6.5 mm (1/4") [Thickness 1.6 mm (1/16")]
Wood
••••••••••••••••••••••
18 mm (23/32")/18 mm (23/32") [Thickness 18 mm (23/32")]
Screw driving Wood screw
••••••••••••
5.1 dia. x 32 mm (#11 x 1-1/4")
/4.8 dia. x 40 mm (#10 x 1-9/16")
Machine screw
••••••••
6 mm (1/4")
Slip torque
••••••••••••••
1.0 --- 5.9 N•m (10 --- 60 kgf•cm, 9 --- 52 in-lbs.)
[22 stages]
Max. torque
••••••••••••
24 N•m (245 kgf•cm, 213 in-lbs.)
DC magnet motor
Trigger switch with change lever for CW* and CCW** rotation(w/o stopper)
T-type
Body
•••••••••••
Glassfiber reinforced polycarbonate resin (green)
Battery
••••••••
ABS resin (black)
Charger
••••••
ABS resin (black)
Sealed cylindrical nickel-cadmium storage battery
DC 12 V
Charging/discharging: approximately 500 times
1.4 Ah
60 minues
(with standard accessory charger at ambient temperature of 20˚C)
Impact rate (No-load)
Kind of battery
Nominal battery
Nominal life
Nominal capacity
Charging time
Ambient charging
temperature
Overcharge prevention circuit:
A thermostat monitors the surface temperature of the battery and, on
detecting the temperature rise which occurs on completion of charging,
automatically turns off the unit to prevent the battery from overcharge.
Input capacity: 51 W
Indication method: Pilot lamp indicator of battery charging
Function: On
••••••••••••••••••••••
During charging
Off
••••••••••••••••••••••
Charging completed
10 ˚C --- 40˚C (50˚F --- 104˚F)
Charger (UC12SD)
••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
1
Battery •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
Cross-recessed head (plus) driver bit (No. 2) ••••••••••••••••••••••••••••••••••••••••••••• 1
Case ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
Bit set ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
Torchlight •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
Gross
Net
DV 12DV
(SSX)
DV 12DV
(SSK)
Charger (UC12SD)
••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
1
Battery •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 2
Cross-recessed head (plus) driver bit (No. 2) ••••••••••••••••••••••••••••••••••••••••••••• 1
Case ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
Bit set ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
Mount type
•••••••••••
Screw-on (UNF 1/2" --- 20)
Diameter
•••••••••••
0.8 --- 10 mm (1/32" --- 3/8")
Low: 0 --- 350/min. High: 0 --- 1,250/min.
Low: 0 --- 5,250/min. High: 0 --- 18,750/min.
CW*: Clockwise CCW**: Counterclockwise
--- 5 ---
P
10 mm (3/8")
Not indicated
0 --- 460
0 --- 1,400
32 N•m (326 kgf•cm)
(283 in-lbs.)
1.9 kg (4.2 lbs.)
25 mm (1")
13 mm (1/2")
Not indicated
0 --- 5,000
0 --- 15,400
Keyless
13 mm (1/2")
2.0 Ah
12 V
60 minutes
Equipped
Equipped
235 mm (9-1/4")
255 mm (10-3/64")
6. COMPARISONS WITH SIMILAR PRODUCTS
Maker
Model
Max. capacity
Rotation speed
(min-1)
Low
High
Max. torque
Overall length
Weight
Remarks*
••••••••
Charging time may vary depending on the type of charger to be used.
Brick
Mild steel
Soft wood
Drilling
Screw
driving
Wood screw
Machine screw
Impact rate
(min-1)
Low
High
Drill chuck
Slip torque
[22 stages]
Battery
Nominal capacity
Nominal voltage
Charging time*
Switch
Type
Capacity
Electric brake
Feedback circuit
Dimensions
Overall height
HITACHI
DV 12DV
10 mm (3/8")
6 mm (1/4")
0 --- 350
0 --- 1,250
24 N•m (245 kgf•cm)
(213 in-lbs.)
1.9 kg (4.2 lbs.)
18 mm (23/32")
10 mm (3/8")
5.1 mm dia. x
32 mm length
(#11 x 1-1/4")
0 --- 5,250
0 --- 18,750
Keyless
10 mm (3/8")
1.4 Ah
12 V
60 minutes
Equipped
Equipped
232 mm (9-9/64")
255 mm (10-3/64")
HITACHI
DV 10DVA
10 mm (3/8")
6 mm (1/4")
0 --- 350
0 --- 1,100
14 N•m (143 kgf•cm)
(124 in-lbs.)
1.9 kg (4.2 lbs.)
18 mm (23/32")
10 mm (3/8")
5.1 mm dia. x
32 mm length
(#11 x 1-1/4")
0 --- 6,300
0 --- 19,800
Keyless
10 mm (3/8")
1.3 Ah
12 V
60 minutes
Equipped
Equipped
284 mm (11-3/16")
240 mm (9-29/64")
[5 stages]
Not indicated
[15 stages]
1.0 --- 5.9 N•m
10 --- 60 kgf•cm
(9 --- 52 in-lbs.)
1.0 --- 4.9 N•m
10 --- 50 kgf•cm
(9 --- 43 in-lbs.)
C
10 mm (3/8")
Not indicated
0 --- 370
0 --- 1,200
20.5 N•m (209 kgf•cm)
(182 in-lbs.)
2.2 kg (4.9 lbs.)
24 mm (15/16")
10 mm (3/8")
6.4 mm dia. x
55 mm length
(#14 x 2-5/32")
0 --- 4,100
0 --- 12,700
Keyless
13 mm (1/2")
2.0 Ah
12 V
60 minutes
Equipped
Equipped
313 mm (12-21/64")
225 mm (8-55/64")
Not indicated
[10 stages]
Loading...