Hitachi DS 14DSFL Technical Data And Service Manual

Hitachi
Brand
Hitachi
Model
DS 14DSFL
Category
Cordless combi drills
Type
Technical Data And Service Manual

This manual is also suitable for

International Sales Division
The Models DS 14DSFL and DS 18DSFL are cordless driver drills equipped with an 14.4 V and 18 V
lithium-ion battery, respectively. The new Models DS 14DSFL and DS 18DSFL are low spec version of DS
14DSAL and DS 18DSAL.
Vigorous sales promotion and expanded market share are anticipated with the introduction of the new Models
DS 14DSFL and DS 18DSFL. The key features of the Models DS 14DSFL and DS 18DSFL are as follows:
(1) Improved overload durability
(2) 22-position torque adjustable clutch (Max. clutch torque: 6.0 N
•m)
(3) Equipped with safe and secure lithium-ion battery
We aim to expand our market share with the new Models DS 14DSFL and DS 18DSFL.
LIST Nos.
DS 14DSFL : H891
DS 18DSFL : H892
Sep. 2010
PRODUCT NAME
Hitachi 14.4 V Cordless Driver Drill
Model DS 14DSFL
Hitachi 18 V Cordless Driver Drill
Model DS 18DSFL
• Tightening and loosening wood screws, self-tapping screws and machine screws
• Drilling into wood, plastic, mild steel and aluminum materials
MARKETING OBJECTIVE
APPLICATIONS
SELLING POINTS
[NEW FEATURES]
Improved overload durability
(improved cooling efficiency)
22-position torque adjustable clutch
Soft-grip handle
Safe and secure lithium-ion battery
(BSL 1415, BSL 1815)
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
D
[DS 18DSFL ]
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:
Model DS 14DSFL
Competitors
Symbols Utilized
Company Name Model Name
M MAKITA BDF343
Model DS 18DSFL
Competitors
Symbols Utilized
Company Name Model Name
M MAKITA BDF453
CONTENTS
Page
SELLING POINTS -------------------------------------------------------------------------------------------------------------- 1
SPECIFICATIONS -------------------------------------------------------------------------------------------------------------- 3
1. Specifications
--------------------------------------------------------------------------------------------------------------------------------- 3
COMPARISON WITH SIMILAR PRODUCTS---------------------------------------------------------------------------- 5
1. Comparison of Specifications --------------------------------------------------------------------------------- 5
2. Comparison of Drilling and Fastening Performance per Charge ------------------------------------- 7
PRECAUTIONS ON SALES PROMOTION ------------------------------------------------------------------------------ 9
1. Safety Instructions ----------------------------------------------------------------------------------------------- 9
2. Inherent Drawbacks of Cordless Driver Drills Requiring
Particular Attention during Sales Promotion ------------------------------------------------------------- 11
REPAIR GUIDE---------------------------------------------------------------------------------------------------------------- 13
1. Precautions on Disassembly and Reassembly --------------------------------------------------------- 13
2. Precautions on Disassembly and Reassembly of the Battery Charger --------------------------- 21
STANDARD REPAIR TIME (UNIT) SCHEDULES-------------------------------------------------------------------- 22
Assembly Diagram for DS 14DSFL
Assembly Diagram for DS 18DSFL
-1-
• 1.76 N•m {18 kgf•cm} intermittent load test (14.4 V)
• 2.06 N•m {21 kgf•cm} intermittent load test (18 V)
Improved overload durability (improved cooling efficiency)
The Models DS 14DSFL and DS 18DSFL ensure durability in continuous operation, thanks to of a powerful
motor and improved air ducts.
SELLING POINTS
70 80
120 140
-2-
22-position torque adjustable clutch (Max. clutch torque: 6.0 N•m)
The 22-position torque adjustable clutch ensures fine torque adjustment for better operability.
Clutch dial position Tightening torque
1 1.0 ± 0.5 N•m {10 ± 5 kgf•cm }
4 1.7 ± 0.6 N•m {17 ± 6 kgf•cm }
10 3.1 ± 0.7 N•m {31 ± 7 kgf•cm }
13 3.8 ± 0.8 N•m {38 ± 8 kgf•cm }
19 5.3 ± 0.9 N•m {53 ± 9 kgf•cm }
22 6.0 ± 1.0 N•m {60 ± 10 kgf•cm }
* There may be some differences in operation depending on shapes of screws and the
workpieces used.
Conduct a test before actual driving.
Soft-grip handle
The handle is widely covered with soft-touch elastomer (rubber-like soft resin). It is slip-resistant and
securely fits in the palm of a hand even if the gripping hand sweats.
Safe and secure lithium-ion batteries (Types BSL 1415 and BSL 1815)
The new 1.5 Ah Types BSL 1415 and BSL 1815 Lithium-ion Batteries were developed for light-duty work.
Both batteries are equipped with an overdischarge protection circuit, overload protection circuit, overheat
protection circuit and voltage monitoring circuit for each cell to prevent reduced battery service life due to
overdischarge (overuse) or overcharge (excessive charging). These protection circuits make it possible to
safely use the batteries.
Precautions on using the Types BSL 1415 and BSL 1815 Lithium-ion Batteries
The Types BSL 1415 and BSL 1815 Lithium-ion Batteries are both equipped with a protective function that
automatically stops output to prolong battery service life. The motor may stop automatically in any of cases
(1), (2) and (3) below, even if the switch is held down during operation. This is due to activation of the
protective function. The batteries are not faulty.
Protective function Source of trouble Corrective action
(1)
Overdischarge
protection circuit
Drop in battery voltage to about:
8 V/BSL 1415
10 V/BSL 1815
Charge the battery immediately.
(2)
Overload
protection circuit
Heavy-duty work
Release the switch and eliminate
the cause of the overload problem.
(3)
Overheat
protection circuit
Continuous operation
or heavy-duty work
Remove the battery from the tool
and allow it to cool down.
-3-
1. Specifications
Model
Item
DS 14DSFL
Capacity
Screw driving Machine screw----------- 6 mm (1/4")
Wood screw
------------- 6.2 mm dia. x 63 mm (#14 x 2-1/2")
Drilling Metal
------ Mild steel --- 12 mm (15/32") [Thickness 1.6 mm (1/16")]
Wood
--------------------- 30 mm (1-3/16") [Thickness 18 mm (11/16")]
Keyless chuck
(10VLRH-N)
Mount type
----------------------Screw-on (UNF 1/2" - 20)
Diameter
-------------------------0.8 to 10 mm (1/32" to 3/8")
Rotation speed
(No-load)
Low: 0 to 450 min
-1
, High: 0 to 1,250 min
-1
Torque
Slip torque ----------------------1 to 6.0 N•m (10 to 60 kgf•cm, 9 to 52 in-lbs.) [22 stages]
Max. torque
---------------------Low: 34 N•m (316 kgf•cm, 274 in-lbs.)
High: 7 N
•m (71 kgf•cm, 62 in-lbs.)
Type of motor Fan-cooled DC magnet motor
Type of switch
Trigger switch with pushing button for forward and reverse rotation changeover
(with brake)
Enclosure
Body -----------------------------Glassfiber-reinforced polyamide resin (black)
and thermoplastic elastomer (green)
Battery
--------------------------Polycarbnate resin (black)
Charger
-------------------------ABS resin (black)
Battery
(Type BSL 1415)
Sealed cylindrical lithium-ion storage battery
Nominal voltage
----------------DC 14.4 V
Nominal life
---------------------Charging/discharging: Approx. 1,000 times
Nominal capacity
---------------1.5 Ah
Charger
(Model UC 18YGSL)
Overcharge protection system:
(1) Battery surface temperature detection (by thermostat or thermistor)
(2) Stop current detection
Power input: 60 W
Charging time: Approx. 40 minutes [for Type BSL 1415 Battery at 20
°C (68°F)]
Operable ambient temperature range: 0
°C to 50°C (32°F to 122°F)
The maximum allowable temperature of the Type BSL 1415 Battery is 50
°C (122°F).
Indication method of battery charging function
Net
Main body unit (including battery) ------------------------------------------- 1.5 kg (3.3 lbs.)
Charger unit (UC 18YGSL, including cord)
--------------------------------- 0.4 kg (0.9 lb.)
Weight
Gross
DS 14DSFL (2LEGK) - -------------------------------------------------------- 4.0 kg (8.7 lbs.)
DS 14DSFL (2LEGX) -
-------------------------------------------------------- 4.0 kg (8.7 lbs.)
2LEGK
• Charger (UC 18YGSL) ------------------------------------------------------------- 1
• Battery (BSL 1415) ----------------------------------------------------------------- 2
• Phillips (plus) driver bit (No. 2) --------------------------------------------------- 1
• Case ------------------------------------------------------------------------------------ 1
Standard
accessories
2LEGX
• Charger (UC 18YGSL) ------------------------------------------------------------- 1
• Battery (BSL 1415) ----------------------------------------------------------------- 2
• Torchlight (UB 18DAL)-------------------------------------------------------------- 1
• Phillips (plus) driver bit (No. 2) --------------------------------------------------- 1
• Case ------------------------------------------------------------------------------------ 1
SPECIFICATIONS
-4-
Model
Item
DS 18DSFL
Capacity
Screw driving Machine screw ------------ 6 mm (1/4")
Wood screw
--------------- 6.8 mm dia. x 50 mm (#16 x 2")
Drilling Metal
------- Mild steel --- 13 mm (1/2") [Thickness 1.6 mm (1/16")]
Wood
----------------------- 38 mm (1-1/2") [Thickness 18 mm (11/16")]
Keyless chuck
(13VLRS-N)
Mount type ----------------------Screw-on (1/2" - 20 UNF)
Diameter
-------------------------2.0 to 13 mm (5/64" to 1/2")
Rotation speed
(No-load)
Low: 0 to 450 min
-1
, High: 0 to 1,250 min
-1
Torque
Slip torque-----------------------1 to 6.0 N•m (10 to 60 kgf•cm, 9 to 52 in-lbs.) [22 stages]
Max. torque
---------------------Low: 41 N•m (418 kgf•cm, 364 in-lbs.)
High: 10 N
•m (101 kgf•cm, 88.7 in-lbs.)
Type of motor Fan-cooled DC magnet motor
Type of switch
Trigger switch with pushing button for forward and reverse rotation changeover
(with brake)
Enclosure
Body -----------------------------Glassfiber-reinforced polyamide resin (black)
and thermoplastic elastomer (green)
Battery --------------------------Polycarbonate resin (black)
Charger
-------------------------ABS resin (black)
Battery
(Type BSL 1815)
Sealed cylindrical lithium-ion storage battery
Nominal voltage
----------------DC 18 V
Nominal life
---------------------Charging/discharging: Approx. 1,000 times
Nominal capacity
---------------1.5 Ah
Charger
(Model UC 18YGSL)
Overcharge protection system:
(1) Battery surface temperature detection (by thermostat or thermistor)
(2) Stop current detection
Power input: 60 W
Charging time: Approx. 40 minutes [for Type BSL 1815 Battery at 20°C (68°F)]
Operable ambient temperature range: 0
°C to 50°C (32°F to 122°F)
The maximum allowable temperature of the Type BSL 1815 Battery is 50
°C (122°F).
Indication method of battery charging function
Net
Main body unit (including battery) ------------------------------------------- 1.7 kg (3.7 lbs.)
Charger unit (UC 18YGSL, including cord)
--------------------------------- 0.4 kg (0.9 lb.)
Weight
Gross
DS 18DSFL (2LEGK) - -------------------------------------------------------- 4.2 kg (9.3 lbs.)
Standard
accessories
2LEGK
• Charger (UC 18YGSL) ------------------------------------------------------ 1
• Battery (BSL 1815) ---------------------------------------------------------- 2
• Phillips (plus) driver bit (No. 2) --------------------------------------------- 1
• Case --------------------------------------------------------------------------- 1
-5-
1. Comparison of Specifications (Superior specifications:
)
HITACHI
Maker
Model
Item
DS 14DSFL DS 14DCL
M
Machine screw
6 mm (1/4”) 6 mm (1/4”) 6 mm (1/4”)
Screw
driving
Wood screw
6.0 mm dia. x 75 mm
(#14 x 3”)
6.0 mm dia. x 75 mm
(#14 x 3”)
5.1 mm dia. x 63 mm
(#11 x 2-1/2”)
Mild steel
12 mm (15/32”) 12 mm (15/32”) 10 mm (3/8”)
Max. capacity
Drilling
Soft wood
30 mm (1-3/16”) 30 mm (1-3/16”) 25 mm (1”)
Low
0 to 450 min
-1
0 to 450 min
-1
0 to 400 min
-1
Rotation
speed
High
0 to 1,250 min
-1
0 to 1,250 min
-1
0 to 1,300 min
-1
1.0 to 6.0 N•m
(10 to 60 kgf•cm)
(9 to 52 in-lbs.)
1.0 to 6.0 N•m
(10 to 60 kgf•cm)
(9 to 52 in-lbs.)
Not indicated
Slip torque
22 positions 22 positions
16 positions
Max. torque
34 N•m
(347 kgf•cm)
(300 in-lbs.)
31 N•m
(316 kgf•cm)
(274 in-lbs.)
36 N•m
(367 kgf•cm)
(319 in-lbs.)
Type Double sleeve Double sleeve
Single sleeve
Drill
chuck
Capacity
10 mm (3/8”) 10 mm (3/8”) 10 mm (3/8”)
Type
Variable speed Variable speed
Variable speed
Switch
Electric brake
Equipped Equipped
Equipped
Automatic spindle lock None None Equipped
Reversing switch
Push-button Push-button
Push-button
Handle shape
T-type T-type
T-type
Soft-grip handle
Equipped Equipped
Equipped
Belt Hook
Equipped None None
Strap
None None None
Nominal
capacity
1.5 Ah 1.5 Ah
1.5 Ah
(Actual 1.1Ah)
Nominal voltage
14.4 V (Li-ion) 14.4 V (Li-ion) 14.4 V (Li-ion)
Battery
Charging time*
40 min.
(UC 18YGSL)
60 min.
(UC 18YKL)
30 min.
(DC 18SD)
Overall length
219 mm (8-5/8”) 218 mm (8-19/32”)
192 mm (7-9/16”)
Overall height
226 mm (8-57/64”) 233 mm (9-11/64”)
226 mm (8-57/64”)
Dimensions
Overall width
80 mm (3-9/64”) 80 mm (3-9/64”)
80 mm (3-9/64”)
Weight
1.5 kg (3.3 lbs.) 1.4 kg (3.1 lbs.)
1.3 kg (2.9 lbs.)
*: Charging time varies depending on the type of charger used.
COMPARISON WITH SIMILAR PRODUCTS
-6-
(Superior specifications:
)
HITACHI
Maker
Model
Item
DS 18DSFL DS 18DCL
M
Machine screw
6 mm (1/4”) 6 mm (1/4”) 6 mm (1/4”)
Screw
driving
Wood screw
6.8 mm dia. x 50 mm
(#16 x 2”)
6.8 mm dia. x 50 mm
(#16 x 2”)
6.0 mm dia. x 75 mm
(#14 x 3”)
Mild steel
13 mm (1/2”) 13 mm (1/2”) 13 mm (1/2”)
Max. capacity
Drilling
Soft wood
38 mm (1-1/2”) 38 mm (1-1/2”) 36 mm (1-27/64”)
Low
0 to 450 min
-1
0 to 450 min
-1
0 to 400 min
-1
Rotation
speed
High
0 to 1,250 min
-1
0 to 1,250 min
-1
0 to 1,300 min
-1
1.0 to 6.0 N•m
(10 to 60 kgf•cm)
(9 to 52 in-lbs.)
1.0 to 6.0 N•m
(10 to 60 kgf•cm)
(9 to 52 in-lbs.)
Not indicated
Slip torque
22 positions 22 positions
16 positions
Max. torque
41 N•m
(418 kgf•cm)
(364 in-lbs.)
41 N•m
(418 kgf•cm)
(364 in-lbs.)
42 N•m
(428 kgf•cm)
(372 in-lbs.)
Type Double sleeve Double sleeve
Single sleeve
Drill
chuck
Capacity
13 mm (1/2”) 13 mm (1/2”) 13 mm (1/2”)
Type
Variable speed Variable speed
Variable speed
Switch
Electric brake
Equipped Equipped
Equipped
Automatic spindle lock None None Equipped
Reversing switch
Push-button Push-button
Push-button
Handle shape
T-type T-type
T-type
Soft-grip handle
Equipped Equipped
Equipped
Belt Hook
Equipped None None
Strap
None None None
Nominal
capacity
1.5 Ah 1.5 Ah
1.5 Ah
(Actual 1.1Ah)
Nominal voltage
18 V (Li-ion) 18 V (Li-ion) 18 V (Li-ion)
Battery
Charging time*
40 min.
(UC 18YGSL)
60 min.
(UC 18YKL)
15 min.
(DC 18RA)
Overall length
228 mm (8-31/32”) 227 mm (8-15/16”)
214 mm (8-27/64”)
Overall height
227 mm (8-15/16”) 236 mm (9-19/64”)
227 mm (8-15/16”)
Dimensions
Overall width
80 mm (3-9/64”) 80 mm (3-9/64”) 80 mm (3-9/64”)
Weight
1.7 kg (3.7 lbs.)
1.6 kg (3.5 lbs.)
1.6 kg (3.5 lbs.)
*: Charging time varies depending on the type of charger used.
-7-
Wood screw
4.8 mm dia
.
(
3/16”
)
American pine
L40 (1-9/16”)
Wood boring
American pine
18 mm dia.
(23/32”)
T18 (23/32”)
HSS Drill bit
Mild steel
6.5 mm dia.
(1/4”)
T1.6 (1/16”)
Machine screw
6 mm (1/4”)
12 mm (15/32”)
2. Comparison of Drilling and Fastening Performance per Charge
Working Capacity
Type of Work Maker Model
0 *250 *500 *750 *1,000
0 50 100 150 200
Drilling
Speed
(sec./pc.)
DS 14DSFL
78 8.6
HITACHI
DS 14DCL 70
7.6
<High speed>
M 97 8.7
DS 14DSFL
2.8
HITACHI
DS 14DCL 2.9
<Low speed>
M 4.4
DS 14DSFL
2.7
HITACHI
DS 14DCL 3.0
<High speed>
M 3.3
DS 14DSFL
0.6
HITACHI
DS 14DCL 0.7
<High speed>
M
0.6
[Working Capacity]
Without *: Number of holes or fasteners per charge
With *: Number of machine screws fastened per charge
The table above shows examples of test data. The batteries used in testing performance are as follows:
Model DS 14DSFL: 1.5 Ah
Model DS 14DCL: 1.5 Ah
M: 1.5 Ah
As actually measured values listed in the table above may vary depending on sharpness of the drill bit,
workpiece hardness (particularly in wood materials), moisture content of wood, charging condition, operator
skill, and other factors, this data should only be used as a comparative guide.
199
183
184
195
185
*665
*690
233
*909
-8-
Wood boring
American pine
24 mm dia.
(61/64”)
T18 (23/32”)
Wood screw
L63 (2-1/2”)
6.2 mm dia
.
(
1/4”
)
American pine
HSS Drill bit
Mild steel
8 mm dia.
(5/16”)
T1.6 (1/16”)
Machine screw
6 mm (1/4”)
12 mm (15/32”)
Working Capacity
Type of Work Maker Model
0 *250 *500 *750 *1,000
0 50 100 150 200
Drilling
Speed
(sec./pc.)
DS 18DSFL
69 8.87
HITACHI
DS 18DCL 68
7.67
<High speed>
M 75 9.99
DS 18DSFL
2.80
HITACHI
DS 18DCL 169 3.17
<Low speed>
M 153 3.68
DS 18DSFL
132
3.74
HITACHI
DS 18DCL 134 3.75
<High speed>
M 103 4.58
DS 18DSFL
0.57
HITACHI
DS 18DCL 0.61
<High speed>
M 0.59
[Working Capacity]
Without *: Number of holes or fasteners per charge
With *: Number of machine screws fastened per charge
The table above shows examples of test data. The batteries used in testing performance are as follows:
Model DS 18DSFL: 1.5 Ah
Model DS 18DCL: 1.5 Ah
M: 1.5 Ah
As actually measured values listed in the table above may vary depending on sharpness of the drill bit,
workpiece hardness (particularly in wood materials), moisture content of wood, charging condition, operator
skill, and other factors, this data should only be used as a comparative guide.
*929
*943
*992
195
-9-
1. Safety Instructions
In the interest of promoting the safest and most efficient use of the Models DS 14DSFL and DS 18DSFL
Cordless Driver Drills by all of our customers, it is very important when concluding a sale that the
salesperson carefully ensure that the buyer seriously recognizes the importance of the Handling
Instructions, and fully understands the precautions listed on the Caution Plate and Nameplate attached to
each tool.
A. Handling instructions
Salespersons must be thoroughly familiar with the Handling Instructions in order to give pertinent advice to
the customer. In particular, they must have a thorough understanding of the precautions on using cordless
tools that differ from those of ordinary electric power tools.
(1) Before use, ensure that the unit is fully charged.
New units are not fully charged. Even if the units were fully charged at the factory, long periods of
inactivity, such as during shipment, cause the storage battery to lose its charge. Customers must be
instructed to fully charge the unit prior to use.
(2) Connect the charger to an AC power outlet only.
Use of any other power source (e.g., DC outlet, fuel powered generator) will cause the charger to
overheat and burn out.
(3) Do not use any voltage-increasing equipment (e.g., transformer) between the power source and
the charger.
Using the charger with voltage higher than that indicated on the unit will result in malfunction.
(4) Conduct battery charging at an ambient temperature range of 0°C to 50°C (32°F to 122°F).
Special temperature-sensitive devices are employed in the charger to permit rapid charging. Ensure
that customers are instructed to use the charger at the indicated ambient temperature range. At
temperatures below 0°C (32°F) the thermostat will not function properly, and the storage battery may be
overcharged. At temperatures above 50°C (122°F), the storage battery cannot be sufficiently charged.
The optimum temperature range is 20°C to 25°C (68°F to 77°F).
(5) The battery charger should not be used continuously.
Charging more than three storage batteries in succession at high ambient temperature will cause the
temperature of coils on the transformer to rise, running the risk of the temperature fuse inserted inside
the transformer inadvertently melting. After charging one battery, please wait at least 15 minutes before
charging the next battery.
(6) Do not insert foreign objects into the air vents on the charger.
The charger case is equipped with air vents to protect internal electronic components against
overheating. Caution the customer not to drop or insert such foreign matter as metallic or flammable
objects into the air vents. This could cause electric shock, fire, or other serious hazards.
PRECAUTIONS ON SALES PROMOTION
-10-
(7) Do not attempt to disassemble the storage battery or the charger.
Special devices such as a thermostat are built into the storage battery and charger to permit rapid
charging. Incorrect parts replacement and/or wiring will cause malfunctions that could result in fire or
other hazards. Instruct the customer to bring these units to an authorized service center in the event
repair or replacement is necessary.
(8) Disposal of the storage battery
Ensure that all customers understand that the storage batteries should be returned to the Hitachi power
tool sales outlet or authorized service center when no longer capable of being recharged or repaired. If
thrown into a fire, the batteries may explode.
B. Caution plates
(1) The following cautions are listed on the nameplate attached to the main body of each tool.
[For the USA and Canada]
(2) The following cautions are listed on the nameplate attached to each storage battery.
[For Europe]
[For the USA and Canada]
(3) The following cautions are listed on the nameplate attached to the Model UC 18YGSL charger.
[For the USA and Canada]
-11-
2. Inherent Drawbacks of Cordless Driver Drills Requiring
Particular Attention during Sales Promotion
The cordless driver drill offers many advantages; it can be used in places where no power source is
available, the absence of a cord allows easy use, etc. However, any cordless tool has certain inherent
drawbacks. Salespersons must be thoroughly familiar with these drawbacks in order to properly advise the
customer in the most efficient use of the tool.
A. Suggestions and precautions on efficient use of the tool
(1) Use the cordless driver drill for comparatively light work.
The motor output of battery driven cordless driver drills is rather low compared with conventional electric
power tools. Accordingly, they are not suitable for the continuous drilling of many holes in succession, or
for drilling into particularly hard material that imposes a heavy load. Salespersons should recommend
conventional electric power tools for such heavy work.
(2) Large-diameter holes should be drilled at low speed.
Instruct the customer that drilling large-diameter holes or performing other work that requires
particularly strong torque should be done at low speed. Because there is less torque at high speed,
attempting such work at high speed will not improve working efficiency.
(3) Do not insert a foreign object into body vent holes.
The body of this tool has vent holes for improved cooling efficiency. As a fan is built into the motor, a
foreign object inserted through a vent hole may cause failure. Please instruct customers to never insert
a foreign object into the vent holes.
(4) Use at thrust of 100 to 150 N (10 to 15 kgf, 22 to 23 lbs.)
The drilling speed of this unit does not accelerate even if the tool is pressed strongly against the
workpiece as when using a typical AC driver drill. Such operation will damage the drill bit, resulting in
not only poor working efficiency but also motor burnout.
(5) Avoid “locking” of the motor
Locking of the motor will generate an overload current that could result in motor burnout and/or rapid
battery deterioration. Salespersons should advise the customer to immediately release the switch and
stop operation if the motor becomes locked. (A jammed drill bit can be disengaged from the workpiece
material by setting the switch to reverse rotation, or by manually turning the main body of the tool.)
(6) Variation in amount of work possible per charge
Although the nominal chargeable capacity of the storage batteries used with the Models DS 14DSFL and
DS 18DSFL is 1.5 Ah, the actual capacity may vary within 10% of that value depending on ambient
temperature during use and charging, and the number of times the batteries have been recharged. It
should be noted that other factors that may affect the amount of work possible per charge are the
working conditions (e.g., ambient temperature, type and moisture content of the workpiece, sharpness
of the drill bit) and the operational skill of the user.
-12-
(7) Precautions on the use of HSS drill bits
For example, although the Model DS 18DSFL is designed for drilling capacities of 38 mm (1-1/2") in
wood, and 13 mm (1/2") in mild steel, this capability is not as efficient as conventional electric power
tools. In particular, when drilling through material with a 13 mm (1/2") drill bit, the drill tends to become
locked when the drill bit penetrates a material. For this reason, the customer should be cautioned to
reduce the thrust on the main body of the drill when drilling completely through a material to avoid
locking the tool. Repeated locking of the drill causes excessive current to flow from the battery, thereby
not only reducing the amount of work possible per charge, but also running the risk of motor burnout.
(8) Securely tighten the sleeve of the keyless chuck.
The keyless chuck may slip during operation when using a cylindrically shaped drill bit shank,
depending on the surface conditions, materials, and other factors. Please instruct customers to
retighten the keyless chuck more securely if the keyless chuck slips during operation. The holding force
of the keyless chuck increases as you increase the tightening force of the keyless chuck.
(9) Avoid continuous use.
Although the Models DS 14DSFL and DS 18DSFL can withstand continuous operation under certain
conditions, operating conditions differ depending on the workpiece material and sharpness of the drill bit
in use. Please instruct customers to avoid continuous use of the Models DS 14DSFL and DS 18DSFL,
and generally take about a 15 minute break following a single charge operation.
(10) Keep the battery out of dust.
Protect the battery from being covered with dust during operation. Protect the battery from being
covered with dust accumulated on the Models DS 14DSFL and DS 18DSFL during operation. Do not
leave the battery in a dusty area when not in use. Remove dust from the battery and store it separately
from such metallic parts as screws and nails.
B. Suggestions and precautions on efficient use of the charger and storage battery
If the Types BSL 1415 and BSL 1815 storage batteries are exposed to direct sunlight for an extended
period or if the tool has just been operated for a long time, charging may not be possible at battery
temperature above 50°C (122°F). In such case, the customer should be advised to place the battery in a
shaded area with a good airflow, and allow it to sufficiently cool down before recharging. This phenomenon
is common to all existing batteries and chargers that employ temperature-sensitive overcharge protection
devices. The cooling time required before recharging can be accomplished varies from a few minutes to
about 40 minutes, depending on the load, duration of use, and ambient temperature.
-13-
Be sure to remove the storage battery (Types BSL 1415, BSL 1815) from the main body before servicing.
Inadvertent triggering of the switch with the storage battery connected poses the danger of the motor
accidently turning.
1. Precautions on Disassembly and Reassembly
[Bold] numbers in the descriptions below correspond to item numbers in the Parts List and exploded
assembly diagram for the Models DS 14DSFL and DS 18DSFL.
1. Removal of the Hook
Remove the Truss Hd. Screw M4 (Black) [29]. Remove the Hook [30] for easier disassembly work, which
can also be done without removing the Hook [30].
2. Removal of Housing (A).(B) Set
First, align the drill mark " " at the Clutch Dial [4] with the triangle mark at Housing (A).(B) Set [25].
Remove the nine Tapping Screw (W/Flange) D3 x 16 (Black) [26] secured to the main body.
Gently open Housing (A) and Housing (B) while holding their battery loading sections. The internal parts
can then be removed collectively as a single assembly or individually. All parts can be easily removed by
raising the Gear Box Ass’y [3]. The parts are separated into the drive unit (including the Motor [33] and
Gear Box Ass’y [3]), the power supply unit (including the DC-Speed Control Switch [40] and Controller
Terminal Set [41]), and the Pushing Button [32].
3. Removal of the Drill Chuck
(a) Turn the Motor [33] counterclockwise (as viewed from the rear) and remove it from the Rear Case [14].
Remove the Shift Knob [38] from the Shift Arm [16]. Be careful not to remove the Shift Arm [16] from the
Rear Case [14] in this operation.
(b) Attach the motor spacer (an accessory of special repair tool J-342, Code No. 324-582) to the assembly
of the Drill Chuck [2], Clutch Dial [4], Front Case [9] and Rear Case [14], then mount the assembly onto
special repair tool J-342 clamped in the vise as illustrated in Fig. 1. In this operation, confirm that the
pinion press-fitted in special repair tool J-342 and Planet Gear (A) Set [21] are properly engaged.
(c) Secure Slide Ring Gear (B) [19] to the Front Case [9] side with the Shift Arm [16].
(d) Turn the sleeve of the Drill Chuck [2] counterclockwise (as viewed from the front) to fully open the jaws
of the Drill Chuck [2]. Turn the Special Screw (Left Hand) M6 x 23 [1] clockwise and remove it. (Note
that the special screw is left-hand threaded.)
(e) Fit the hexagonal bar wrench M10 into the Drill Chuck [2] as illustrated in Fig. 1 and remove the Drill
Chuck [2] by turning the hexagonal bar wrench counterclockwise.
REPAIR GUIDE
Disassembl
y
-14-
Hexagonal bar wrench
Vise
Special repair tool (J-342)
Shift Arm [16]
Drill Chuck [2]
Clutch Dial [4]
Front Case [9]
Slide Ring Gear (B) [19]
Rear Case [14]
Fig. 1
4. Disassembly of the gear unit
Remove the Shift Arm [16] from the Rear Case [14], and then turn Washer (B) [23] mounted in the Rear
Case [14] counterclockwise to remove. Take out the First Ring Gear [22], Planet Gear (A) Set [21] (3 pcs.),
Pinion (B) [20], Planet Gear (B) Set [18] (3 pcs.), Pinion (C) [17] and Slide Ring Gear (B) [19] in that order.
Then remove the Screw Set D3 x 12 [15] (4 pcs.) connecting the Front Case [9] and Rear Case [14].
Finally, remove Washer (A) [13], Planet Gear (C) Set [12] (3 pcs.), Ring Gear [11], and six Steel Ball D5
[10] from the Front Case [9] in that order. Be careful not to lose the six Steel Ball D5 [10] in this operation.
5. Disassembly of the drive unit
(a) Remove the Clutch Dial [4] from the Front Case [9].
NOTE: Do not remove the Nut [6] from the Front Case [9] in this step.
(b) Remove the Shift Knob [38] from the Shift Arm [16], remove the Screw Set D3 x 12 [15] (2 pcs.) from
the Rear Case [14], and then remove the Shift Arm [16] from the Gear Box Ass’y [3]. Do not deform the
Shift Arm [16] by applying excessive force.
(c) Turn the Motor Spacer [24] counterclockwise (as viewed from the rear of the armature), Pinion (C) [17],
and Pinion (B) [20] until you hear a click. Remove the Motor Spacer [24] from the Rear Case [14]. The
parts are now separated into the armature unit and the gear unit.
(d) Push the top of the Click Spring [5] and remove it from the Front Case [9] if it needs to be replaced.
NOTE: Do not reuse the removed Click Spring [5].
6. Disassembly of the clutch unit
(a) After pressing up the hook of the Front Case [9] with a small
flat-blade screwdriver, you can directly remove the Clutch Dial
[4] and Click Spring [5] . (See Fig. 2.)
(b) Turn the Nut [6] counterclockwise and remove it from the Front
Case [9], then remove the Spring [7] and Washer (D) [8] from
the Front Case [9].
NOTE: Do not disassemble the Front Case [9].
Fig. 2
Hook (3pcs.)
-15-
Terminal support
Controller Terminal Set [41]
Internal wire (white)
DC-Speed Control Switch [40]
Internal Wire (Red) [39]
Internal Wire (Black) [34]
Internal wire (brown)
Internal wire (red)
Motor [33]
Negative side
Positive side
Red marking
Fig. 3
7. Disassembly of the power supply unit
NOTE: Do not remove the heat sink secured to the DC-Speed Control Switch [40] with a screw.
Remove the two Machine Screw (W/Sp. Washer) M4 x 6 [28], and then separate the Motor Spacer [24]
from the Motor [33]. Use a soldering iron to disconnect the Internal Wire (Black) [34] and Internal Wire
(Red) [39] from the Motor [33], and then disconnect both from the DC-Speed Control Switch [40]. Next, use
the soldering iron to disconnect the DC-Speed Control Switch [40] and Controller Terminal Set [41] in the
same manner.
Reassembly can generally be performed by reversing the disassembly procedures. However, special
attention should be given to the following items.
1. Reassembly of the power supply unit
Perform wiring according to the wiring diagram. (See Fig. 3.) Pay attention to the connecting direction of the
internal wires and terminals.
• Solder the internal wire (white) coming from the top of the Controller Terminal Set [41] to the “B-“ terminal
of the DC-Speed Control Switch [40]. Then solder the internal wires (brown and red) coming from the top
of the Controller Terminal Set [41] to the “B+” terminal of the DC-Speed Control Switch [40] (Fig. 3).
• Solder the Internal Wire (Red) [39] to the “M1” terminal of the DC-Speed Control Switch [40] and
positive side terminal (with red marking) of the Motor [33] (Fig. 3).
• Solder the Internal Wire (Black) [34] to the “M2” terminal of the DC-Speed Control Switch [40] and
negative side terminal of the Motor [33] (Fig. 3).
Reassembl
y
-16-
Front Case [9]
Clutch Dial [4]
Click Spring [5]
Nut [6]
Spring [7]
Washer (D) [8]
Notch
2. Reassembly of the clutch unit
(a) Mount Washer (D) [8] and the Spring [7] onto the Front Case [9]. When mounting Washer (D) [8] onto the
Front Case [9], align the projection on the Front Case [9] with the notch of Washer (D) [8]. (See Fig. 4.)
(b) Mount the Nut [6] onto the Front Case [9]. (See Fig. 5.)
Align register mark (o) on the Nut [6] with the register mark on the Front Case [9]. Turn the Nut [6] about
1-1/2 turns clockwise so that register mark (∆) on the Nut [6] is aligned with the register mark on the
Front Case [9]. Check that the Y surface of the Nut [6] is aligned with the Z surface of the Front Case
[9].
Fig. 4
Fig. 5
-17-
Rear Case [14]
Shift Arm [16]
Steel Ball D5 [10]
Ring Gear [11]
Planet Gear (C) Set [12]
Washer (A) [13]
Screw Set D3 x 12 [15]
Pinion (C) [17]
Planet Gear (B) Set [18]
Slide Ring Gear (B) [19]
Pinion (B) [20]
Planet Gear (A) Set [21]
First Ring Gear [22]
Washer (B) [23]
Groove
Fig. 7
(c) With the ridge at the Click Spring [5] facing the front side, insert the Click Spring [5] into the recess of
the Front Case [9]. Then mount the Clutch Dial [4] to the Nut [6] by engaging the wider projection of the
Nut [6] with the wider recess of the Clutch Dial [4]. (The wider recess of the Clutch Dial [4] is positioned
at "5" when viewed from outside.) Be sure to fit the hook of the Front Case [9] into the hole in the Clutch
Dial [4]. (See Fig. 6.)
NOTE: Do not push the Clutch Dial [4] when assembling. Otherwise, the click spring may become
deformed and fail to work properly.
3. Reassembly of the gear unit
(a) Apply grease (Hitachi Motor Grease No. 29, Code No. 930035) to the meshing parts of the gear.
(b) Install the parts in series from the six Steel Ball D5 [10] to Washer (B) [23] as shown in Fig. 7.
Fig. 6
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Hitachi DS 14DSFL Technical Data And Service Manual

Hitachi
Brand
Hitachi
Model
DS 14DSFL
Category
Cordless combi drills
Type
Technical Data And Service Manual
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