Hitachi DN12DY Manual

POWER TOOLS
TECHNICAL DATA
AND
SERVICE MANUAL
CORDLESS ANGLE DRILL
DN 12DY
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
LIST No. F883 Mar. 2003
D
MODEL
DN 12DY

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
C MAKITA DA312DW
P DEWALT DW965K

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 ................................................................................ 6
7. WORKING PERFORMANCE PER SINGLE CHARGE.................................................................... 7
8. PRECAUTIONS IN SALES PROMOTION ....................................................................................... 8
8-1. Safety Instructions .............................................................................................................................8
8-2. Inherent Drawbacks of Cordless Angle Drills Requiring Particular Attention
During Sales Promotion ...................................................................................................................10
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 ................................................14
11. STANDARD REPAIR TIME (UNIT) SCHEDULES........................................................................ 15
Assembly Diagram for DN 12DY

--- 1 ---
1. PRODUCT NAME
Hitachi 12 V Cordless Angle Drill, Model DN 12DY
2. MARKETING OBJECTIVE
The new Model DN 12DY is a 12-V version of the well-reputed Model DN 10DY. The torque and the operation
efficiency are higher than those of the Model DN 10DY. With the Model DN 12DY, we aim to enhance our share.
3. APPLICATIONS
Drilling holes in wood, mild steel, plastic and similar materials
Tightening and removing of wood screws and tapping screws
4. SELLING POINTS
95 mm
10 mm (3/8") keyless chuck with
racheting lock mechanism
12 V battery
9.6-V battery is also usable.
Push-button type
reversing switch
Easy-to-grip handle design
Circumference: 160 mm
Variable speed switch
with braking function
Equipped with feedback
power control
Shorter height (95 mm) and compact design
ensure high operation efficiency.

--- 2 ---
4-1. Selling Point Descriptions
4-1-1. Shorter height and compact design
Table 1
Maker
Model HITACHI
DN 12DY C
A-A circumference 160 mm B-B circumference 174 mm
C-C circumference 198 mm
Overall length x
height (mm)
Maker
Model P
Overall length x
height (mm)

--- 3 ---
4-1-2. 10 mm (3/8") keyless chuck with ratcheting lock mechanism
This model is equipped with ratcheting lock mechanism to prevent the chuck from loosening.
Loosen
Tighten
Sleeve
Ring
4-1-3. 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.
4-1-4. 9.6-V battery is also usable
The Model DN 12DY can also operate on the 9.6-V battery. However, the working performance is about 80% of
that when operating on the 12-V battery due to the lower voltage. Refer to "7. WORKING PERFORMANCE PER
SINGLE CHARGE" for working performance of the Model DN 12DY per charge.
Fig. 1

--- 4 ---
5. SPECIFICATIONS
Screwdriver Wood screw ••••••••••••5.1 dia. x 40 mm (#11 x 1-9/16")
Drill Metal ••••••Mild steel 10 mm (3/8") [thickness 1.6 mm (1/16")]
Aluminum 10 mm (3/8") [thickness 1.6 mm (1/16")]
Wood••••••••••••••••••••••18 mm (11/16") [thickness 18 mm (11/16")]
Mount type ••••••••• Screw-on (UNF 3/8" --- 24)
Diameter •••••••••••• 1.0 --- 10 mm (1/32" --- 3/8")
0 --- 800 /min
Max. torque •••••••••••• 9 N
•
m (92 kgf
•
cm (80 in-lbs.))
DC magnet motor
Trigger switch with push button for forward and reverse rotation changeover
Body •••••••••••••••••••••• Glassfiber reinforced polycarbonate resin (green)
Battery ••••••••••••••••••• ABS resin (black)
Charger ••••••••••••••••••ABS resin (black)
Sealed cylindrical nickel-cadmium battery
Nominal voltage ••••••••••••••• DC 12 V
Nominal life ••••••••••••••••••••• Charging/discharging: approximately 300 times
(in case of Model UC 12SD or UC 14YF2 or UC 24YFA)
Nominal capacity •••••••••••••• 1.2 Ah
Sealed cylindrical nickel-cadmium battery
Nominal voltage ••••••••••••••• DC 12 V
Nominal life ••••••••••••••••••••• Charging/discharging: approximately 1000 times
(in case of Model UC 14YF2 or UC 24YFA)
Nominal capacity •••••••••••••• 2.0 Ah
Sealed cylindrical nickel-metal hydride battery
Nominal voltage ••••••••••••••• DC 12 V
Nominal life ••••••••••••••••••••• Charging/discharging: approximately 500 times
(in case of Model UC 14YF2 or UC 24YFA)
Nominal capacity •••••••••••••• 3.0 Ah
Overcharge protection system: (1) Battery voltage detection ( 2V system)
(2) Battery surface temperature detection
(thermostat or thermistor)
(3) 120 minutes timer
Power input: 44 W/90 W
Charging time: Approx. 45/30 minutes [for type EB 1212S battery at 20˚C (68˚F)]
Approx. 60/50 minutes [for type EB 1220BL battery at 20˚C (68˚F)]
Approx. 90/70 minutes [for type EB 1230HL battery at 20˚C (68˚F)]
Operable ambient temperature range: 0˚C -- 40˚C (32˚F -- 104˚F)
The maximum allowable temperature of the type EB 1212S or EB 1220BL battery
is 60˚C (140˚F) and the type EB 1230HL battery is 45˚C (113˚F).
Indication method of battery charging function:
Capacity
Keyless chuck
(10TLRJ-N)
Rotation speed (No-load)
Torque
Type of motor
Type of switch
Enclosure
Battery
(Type EB 1212S)
Battery
(Type EB 1220BL)
Battery
(Type EB 1230HL)
Charger
(Model UC 14YF2/
UC 24YFA)

--- 5 ---
Weight Net
Gross
Standard accessories
With 2 batteries (EB 1220BL or EB 1230HL) and charger (UC 14YF2), case •• ••4.8 kg (10.6 Ibs.)
With 2 batteries (EB 1220BL or EB 1230HL) and charger (UC 24YF2), case ••••• 4.1 kg (9.0 Ibs.)
With 1 battery (EB 1220BL or EB 1230HL) and charger (UC 14YF2), case ••••••• 4.1 kg (9.0 Ibs.)
With 1 battery (EB 1220BL or EB 1230HL) and charger (UC 24YFA), case ••••••• 3.4 kg (7.5 Ibs.)
With 2 batteries (EB 1212S) and charger (UC 12SD), case •••••••••••••••••••••••••• 4.5 kg (9.9 Ibs.)
Main body (including EB 1220BL/EB 1230HL) •••••••••••••••••••••••••• 1.4 kg (3.1 Ibs.)
Main body (including EB 1212S) ••••••••••••••••••••••••••••••••••••••••••••• 1.3 kg (2.9 Ibs.)
Charger unit (UC 12SD) (including cord) •••••••••••••••••••••••••••••••••• 1.5 kg (3.3 Ibs.)
Charger unit (UC 14YF2) (including cord) •••••••••••••••••••••••••••••••• 1.3 kg (2.9 Ibs.)
Charger unit (UC 24YFA) (including cord) •••••••••••••••••••••••••••••••• 0.6 kg (1.3 Ibs.)
Charger (UC 12SD or UC 14YF2 or UC 24YFA) ••••••••••••••••••••••••••••••••••••••••••••••• 1
Cross-recessed head (plus) driver bit (No.2) •••••••••••••••••••••••••••••••••••••••••••••••••••••1
Case ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••1
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.
Power input: 51 W
Charging time: Approx. 60 minutes [for type EB 1212S battery at 20˚C (68˚F)]
Indication method ••••••• Pilot lamp indicator of battery charging
Function: On •••••••••••••• During charging
Off •••••••••••••• Charging completed
Charger
(Model UC 12SD)
(for type EB 1212S battery)

--- 6 ---
10 mm (3/8")
10 mm (3/8")
12 mm (15/32")
4.8 dia.
(#10)
0 --- 800/min
Keyless
10 mm (3/8")
Lever
None
12 V
105 mm (4-9/64")
1.4 kg
4.9 N•m
51 kgf•cm
(44 in-lbs.)
Variable speed
Not indicated
Equipped
None
2.6 Ah
325 mm (12-51/64")
(3.1 lbs.)
6. COMPARISONS WITH SIMILAR PRODUCTS
Maker
Model
Max. capacity
Battery
Mild steel
Aluminum
Wood screw
Drilling
Rotation speed
Drill chuck Type Capacity
Reversing switch
Strap
Max. torque
Nominal capacity
Nominal voltage
Overall length
Weight
HITACHI
DN 12DY
10 mm (3/8")
10 mm (3/8")
18 mm (11/16")
5.1 dia. x 40
(#11 x 1-9/16")
0 --- 800/min
Keyless
10 mm (3/8")
Push-button
Equipped
1.2 Ah
12 V
95 mm (3-3/4")
1.3 kg
9.0 N•m
92 kgf•cm
(80 in-lbs.)
Positive lock
Switch
Type
Feedback circuit
Variable speed
Equipped
Electric brake Equipped
Equipped
Overall height
Dimensions
Wood
Screw
driving
3.0 Ah
2.0 Ah
296 mm
(11-21/32") 305 mm (12")
1.4 kg
(2.9 lbs.) (3.1 lbs.)
DN 10DY (9.6 V)
10 mm (3/8")
10 mm (3/8")
15 mm (19/32")
5.1 dia. x 35
(#11 x 1-3/8")
0 --- 800/min
Keyless
10 mm (3/8")
Push-button
Equipped
9.6 V
97 mm (3-13/16")
1.3 kg
7.8 N•m
80 kgf•cm
(71 in-lbs.)
Variable speed
Equipped
Equipped
None
2.0 Ah
305 mm (12")
(2.9 lbs.)
C
10 mm (3/8")
10 mm (3/8")
25 mm (1")
Not indicated
0 --- 400/0 -- 1200 min
Keyless
10 mm (3/8")
Push-button
None
12 V
113 mm (4-29/64")
1.85 kg
*120.3 N•m
207 kgf•cm
(180 in-lbs.)
Variable speed
Not indicated
Equipped
None
1.3 Ah
318 mm (12-33/64")
(4.1 lbs.)
P
Remarks *1•••••••••••• at low speed

--- 7 ---
Test conditions Maker Model name
No. of drilling or fastening operations per charge (*1)
Working
time
(sec./pc.)
0600
200 400
DN 12DY
(W/EB 1230HL)
HITACHI
(12 V)
HITACHI
(9.6 V)
C
P
DN 12DY
(W/EB 1220BL)
DN 12DY
(W/EB 1212S)
DN 12Y
(W/EB 9B)
DN 10DY
(W/EB 9B)
18
18
18
21
19
15
23
120
80
48
35
116
54
65
DN 12DY
(W/EB 1230HL)
HITACHI
(12 V)
HITACHI
(9.6 V)
C
P
DN 12DY
(W/EB 1220BL)
DN 12DY
(W/EB 1212S)
DN 12Y
(W/EB 9B)
DN 10DY
(W/EB 9B)
DN 12DY
(W/EB 1230HL)
HITACHI
(12 V)
HITACHI
(9.6 V)
C
P
DN 12DY
(W/EB 1220BL)
DN 12DY
(W/EB 1212S)
DN 12Y
(W/EB 9B)
DN 10DY
(W/EB 9B)
1.9
1.9
1.9
2.0
2.1
1.7
2.5
366
244
146
121
338
204
204
541
360
216
182
477
248
308
1.2
1.2
1.2
1.5
1.4
1.1
1.6
7. WORKING PERFORMANCE PER SINGLE CHARGE
Drilling and fastening performance comparison per charge
Remarks*1: Number of holes or fasteners per charge
The above table shows an example of test data obtained using the battery which is standard for this tool.
As actually measured values listed in the above table may vary depending on sharpness of 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.
Mild steel