Hitachi DS 12DVB2, DS 9DVB2, DS 18DVB2 Technical Data And Service Manual

TECHNICAL DATA

AND

SERVICE MANUAL

CORDLESS DRIVER DRILL

DS 12DVB2

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

LIST No. G804

Apr. 2004

D

MODEL

DS 12DVB2

Hitachi



Power Tools

Symbol Utilized

Competitor

Company Name

Model Name

MAKITA

6317D

C

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:

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 Driver Drills Requiring Particular Attention

During Sales Promotion ......................................................................................................................9

9. REFERENCE MATERIALS .............................................................................................................. 11

9-1. Speed Control Mechanism ............................................................................................................... 11

10. REPAIR GUIDE ............................................................................................................................. 12

10-1. Precautions in Disassembly and Reassembly ................................................................................12

10-2. Precautions in Disassembly and Reassembly of Battery Charger .................................................20

11. STANDARD REPAIR TIME (UNIT) SCHEDULES......................................................................... 21

Assembly Diagram for DS 12DVB2

--- 1 ---

1. PRODUCT NAME

Hitachi 12 V Cordless Driver Drill, Model DS 12DVB2

2. MARKETING OBJECTIVE

The current Model DS 12DVB is popular as a professional-use 12 V cordless driver drill. However, about two

years have already passed since the sales start. To cope with this situation, the model is upgraded to the more

convenient Model DS 12DVB2 equipped with an advanced case.

3. APPLICATIONS

Tightening and loosening wood screws, self-tapping screws and machine screws

Drilling into wood materials, plastic, mild steel and aluminum

4. SELLING POINTS

Variable torque setting
for fastener tightening

22-position adjustable
torque setting

Two-speed transmission with
one-touch speed shift knob

Variable speed switch
with braking function

Equipped with feedback
power control

Push-button type
reversing switch

Soft-grip handle

Durable fan-cooled
powerful motor

Automatic spindle lock mechanism

13 mm (1/2") single-sleeve
keyless chuck with ratcheting
lock mechanism

12 V cassette battery

--- 2 ---

Fig. 1 Clutch torque

1

60

55

50

45

40

35

30

25

20

15

10

5.9

5.4

4.9

4.4

3.9

3.4

2.9

2.5

2.0

1.5

1.0

Clutch position

Adjustable torque is about 2 kgf

.

cm
at each click within the torque range
of 10 --- 60 kgf

.

cm.

Torque (N

.

m) (kgf.cm)

3

5

7

9

11

13

15

17

19

22

4-1. Selling Point Descriptions

4-1-1. 22-position adjustable torque setting

The torque can be set finely thanks to the adoption of the 22 clutch positions to improve the operability.

4-1-2. Durable fan-cooled powerful motor

The cooling fan incorporated in the motor and the air vents provided in its outer frame greatly enhance the cooling

effect, ensuring improved durability in continuous operation.

4-1-3. 13 mm (1/2") single-sleeve keyless chuck with ratcheting lock mechanism

The keyless chuck facilitates fast and easy replacement of driver bits. Replacement can be carried out simply by

holding the main unit with one hand, while turning the sleeve with the other hand. This model is also equipped

with ratcheting lock mechanism to prevent the chuck from loosening.

4-1-4. Variable speed switch with braking function

The braking function allows the driver unit to stop rotation immediately when the trigger switch is released, which

is a convenient feature during actual working. Also, the feedback system ensures a sufficiently large torque even

in the variable speed range.

Fig. 2

Sleeve

Tighten

Loosen

--- 3 ---

4-1-5. Advanced case

The new case satisfies the following demands.

Compact and sturdy

Refined two-tone body design

Excellent accommodation

(Stored many accessories such as torchlight, bit set, extra batteries, long bit and various bits)

--- 4 ---

5. SPECIFICATIONS

Screwdriver Machine screw

••••••••

6 mm (1/4")

Wood screw

••••••••••••

8 dia. x 38 mm (#20 x 1-1/2")

Drill Metal

••••••

Mild steel 13 mm (1/2") [Thickness 1.6 mm (1/16")]
Aluminum 13 mm (1/2") [Thickness 1.6 mm (1/16")]

Wood

••••••••••••••••••••••

32 mm (1-1/4") [Thickness 18 mm (11/16")]

Mount type

••••

Screw-on (UNF 1/2" --- 20)

Diameter

•••••••

1.5 --- 13 mm (1/16" --- 1/2")
Low: 0 --- 350/min, High: 0 --- 1,300/min
DC magnet motor
Slip torque

••••••••

1.0 --- 5.9 N•m (10 --- 60 kgf•cm, 8.7 --- 52 in-lbs.) [22 stages]

Max. torque

•••••••

High: 9 N•m (90 kgf•cm, 78 in-lbs.), Low: 36 N•m (367 kgf•cm, 319 in-lbs.)
Trigger switch with pushing button for forward and reverse rotation changeover (w/o stopper)
T-type

Body

•••••••••••

Glassfiber reinforced polycarbonate resin (green) and thermoplastic elastomer (black)

Battery

••••••••

ABS resin (black)

Charger

••••••

ABS resin (black)
Sealed cylindrical nickel-cadmium storage battery
Nominal voltage

•••••••••••••••

DC 12 V

Nominal life

•••••••••••••••••••••

Charging/discharging: Approx. 1,000 times
(in the case of Model UC 14YFA)

Nominal capacity

•••••••••••••

2.0Ah
Sealed cylindrical nickel-metal-hydride storage battery
Nominal voltage

•••••••••••••••

DC 12 V

Nominal life

•••••••••••••••••••••

Charging/discharging: Approx. 500 times
(in the case of Model UC 14YFA)

Nominal capacity

•••••••••••••

2.2 Ah
Overcharge protection system: (1) Battery voltage detection ( 2V system)

Battery voltage detection (dT/dt system) for Ni-MH
battery
(2) Battery surface temperature detection

(thermostat or thermistor)

(3) 120 minutes timer

Power input: 56 W
Charging time: Approx. 50 minutes [for type EB 1220BL battery at 20ûC (68ûF)]
Approx. 55 minutes [for type EB 1222HL battery at 20ûC (68ûF)]
Operable ambient temperature range: 0ûC --- 40ûC (32ûF --- 104ûF)
The maximum allowable temperature of the type EB 1220BL battery is 60ûC (140ûF)
and the type EB 1222HL battery is 45ûC (113ûF).
Indication method of battery charging function:

Capacity

Keyless chuck
(13VLRG-N)

Rotation speed (No-load)

Type of motor
Torque

Type of switch
Handle configuration

Enclosure

Battery
(Type EB 1220BL)

Charger
(Model UC 14YFA)

Battery
(Type EB 1222HL)

Red pilot lamp
remains lit or
flashes

Green pilot
lamp is lit

Prior to charging

During charging

Charging
completed

Charging not
possible

High battery
temperature

Lights

Blinks

Blinks

Lights

Flickers

Battery or charger
is faulty.

Charging not possible
because battery
temperature is too high.

0.1 sec. ON

Stays ON constantly

Stays ON constantly

0.1 sec. OFF

0.5 sec. ON

0.5 sec. OFF

0.5 sec. ON

0.5 sec. OFF

Pilot lamp indications

Main body unit (including battery)

•••••••••••••••••••••••••••••••••••••••••••••••••••••

1.9 kg (4.2 Ibs.)

Charger unit (UC 14YFA (including cord)

••••••••••••••••••••••••••••••••••••••••••

0.6 kg (1.3 Ibs.)

Gross with charger (UC 14YFA) and case

••••••••••••••••••••••••••••••••••••••••

5.4 kg (11.2 Ibs.)

Weight

Standard accessories

Charger (UC 14YFA)

•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••

1

Extra battery

••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••

1

Phillips (plus) driver bit (No. 2)

•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••

1

Case

•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••

1

--- 5 ---

6. COMPARISONS WITH SIMILAR PRODUCTS

Maker

Model

Max. capacity

Battery

Screwing

Machine screw

Wood screw

Mild steel

Aluminum

Soft wood

Drilling

Rotation
speed (/min)

Low

High

Slip torque

Max. torque

Nominal capacity

Nominal voltage

Charging time*

Overall length

Weight

HITACHI

DS 12DVB2

6 mm (1/4")

8 mm dia. x 38 mm

(#20 x 1-1/2")

13 mm (1/2")

13 mm (1/2")

32 mm (1-1/4")

0 --- 350

0 --- 1,300

1.0 --- 5.9 N•m

10 --- 60 kgf•cm

(8.7 --- 52 in-lbs.)

[22 stages]

36 N•m (367 kgf•cm)

(319 in-lbs.)

(46.0 N•m)

(410 in-lbs.)

2.0/2.2 Ah

12 V

50/55 min.

241 mm (9-1/2")

1.9 kg (4.2 lbs.)

13 mm (1/2")

6 mm dia. x 75 mm

(1/4" x 3")

13 mm (1/2")

13 mm (1/2")

25.4 mm (1")

0 --- 400

0 --- 1,300

C

Not indicated

[16 stages]

35 N•m (357 kgf•cm)

(310 in-lbs.)

Not indicated

2.6 Ah

12 V

60 min.

Equipped

243 mm (9-9/16")

2.0 kg (4.4 lbs.)

Remarks*

••••••••

Charging time may vary depending on the type of charger to be used.

Drill chuck

Capacity

Type

13 mm (1/2")

Single sleeve

13 mm (1/2")

Double sleeve

○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○

Max. torque (hard joint)

○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○

(Actually measured value)

(68.7 N•m)

(620 in-lbs.)

Locking device

Equipped

Equipped

Spindle lock function

Soft-grip handle

Equipped

Equipped

Equipped

Equipped

None

Switch

Feedback circuit

Electric brake

Equipped

Not indicated

Dimensions

--- 6 ---

Test conditions Maker Model

Working capacity (*1)

Working

time

(sec./pc.)

0

*400

100

*800

*1200

300

DS 12DVB2

HITACHI

C

6.6

90

80 (105)

6.4

1.3

1.3

5.8

5.8

0.7

0.7

DS 12DVB2

HITACHI

C

DS 12DVB2

HITACHI

C

DS 12DVB2

HITACHI

C

"High speed"

"High speed"

"High speed"

"Low speed"

80

80 (105)

205

200 (260)

500

505 (660)

200

7. WORKING PERFORMANCE PER SINGLE CHARGE

Drilling and fastening performance comparison per charge

Remark* Number of machine screws fastened per charge
Remark*1 Number of holes or fasteners per charge
The above table shows an example of test data. The batteries used in this test data are as follows:

Model DS 12DVB2 and C: 2.0 Ah
The figures in parentheses ( ) indicate the values for a 2.6-Ah battery.
As actually measured values listed in the above table may vary depending on sharpness of the drill bit, workpiece
hardness (particularly in wood materials), moisture content of wood, charging condition, operator skill, etc.
This data should be used as a comparative guide only.