ECHNICAL INFORMATION
PRODUCT
T
P 1/ 8
BDA341/ BDA351
Model No.
Description
L
14.4V/18V Cordless Angle Drill 10mm (3/8")
H
CONCEPT AND MAIN APPLICATIONS
Models BDA341 and BDA351 have been developed as the DC version tools
of Model DA3011F, featuring:
BDA341
W
Lightweight design obtained by using Li-ion battery as a power unit
High power 4-pole motor for excellent drilling performance
Sister tools featuring Keyed drill chuck are also available
as Models BDA340/ BDA350.
(See Technical Information of BDA340/ BDA350 for detailed information.)
BDA351
Dimensions: mm (")
BDA341 BDA351
326 (12-7/8)
79 (3-1/8)
These products are available in the following variations.
Length (L)
Width (W)
Height (H) 97 (3-13/16) 115 (4-1/2)
BDA341
Battery
type
Battery
cover
Plastic carrying
case
Model No.
Charger
No
Offered to
quantity
---
BDA341Z
No
No
No
All countries
BDA341
BDA341RFE
BDA341RF
North America
2
1
1
BL1430
(Li-ion 3.0Ah)
DC18RA
All countries except
North America
Yes
No
BDA351
Battery
type
Battery
cover
Plastic carrying
case
Charger
No
Offered to
Model No.
quantity
---
BDA351Z
No
No
No
All countries
BDA351
BDA351RFE
BDA351RF
North America
All countries except
North America
2
1
1
BL1830
(Li-ion 3.0Ah)
DC18RA
Yes
No
Specification
Model
BDA341
BDA351
Voltage: V
14.4
18
Battery Capacity: Ah
Cell
3.0
Li-ion
Max output: W
230
280
No load speed: min-1=rpm
Drill chuck type
0 - 1,700
0 - 1,800
Keyless, Single sleeve
Capacity of drill chuck: mm (")
1.5 (1/16) - 10 (3/8)
Steel
Capacity: mm (")
Wood
10 (3/8)
25 (1)
Yes
Electric brake
Variable speed control
Reverse switch
Yes
Yes
Yes
LED job light
*with Battery BL1430
**with Battery BL1830
Net weight: kg (lbs)
1.6 (3.5)*
1.7 (3.7)**
Standard equipment
Side grip ........... 1 Note: The standard equipment for the tool shown above may differ by country.
Optional accessories
Charger DC24SA (for North America only)
Battery BL1430 (for BDA341) Drill bits for wood Fast charger DC18RA
Charger DC24SC (except for North America) Battery BL1830 (for BDA351) Drill bits for steel Belt clip
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P 3/ 8
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-1. Keyless Drill Chuck
DISASSEMBLING
Remove Keyless drill chuck as illustrated in Figs. 2 and 3. If it is difficult to remove in this way, Keyless drill chuck
can be removed as illustrated in Figs.2A and 3A.
Fig. 2
Fig. 3
1. Hold Hex wrench 8 with Keyless drill chuck.
2. Firmly gripping the body in the near
of Terminal, turn the machine
counterclockwise.
Correct setting of Hex Wrench 8
Clamp the long portion of Hex wrench 8
when using vise.
Hex wrench 8
Hex wrench 8
Vise
Clamp the flat surface
of Hex wrench 8.
Vise
Fig. 2A
Fig. 3A
1. Hold Hex wrench 8
with Keyless drill chuck.
Gap between
Keyless drill chuck
and Gear housing
1R139
2.5mm in thickness
14mm
width groove
Hex wrench 8
1R139 modified
as shown in Fig. 2A
Make the thickness of this portion thin to 2.5mm
by grinding in order to insert 1R139 into the gap
between chuck and Gear housing.
2. Turn Hex wrench 8 counterclockwise by striking
with Hammer.
ASSEMBLING
(1) Do the reverse of the disassembling steps. Refer to Figs. 3 and 2., or Figs. 3A and 2A.
(2) Turn the machine or Hex wrench clockwise to tighten Keyless drill chuck. The fastening torque for Drill chuck is
40 - 45 N.m.
Note: Keyless drill chuck may further turn resisting shaft lock mechanism, while sounding like clutch in work.
This phenomenon does not show any trouble, but Keyless drill chuck is tightened firmly.
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P 4/ 8
Repair
[3]-2 Spiral Bevel Gear 26
DISASSEMBLING
(1) Remove Keyless drill chuck as illustrated in Figs. 2 and 3 / Figs. 2A and 3A. And disassemble Bearing retainer as
illustrated in Figs. 4 and 5.
(2) Disassemble Spiral bevel gear 26 in the order of Figs. 6to 10.
Fig. 4
Fig. 5
To fit 1R292 to the notch of Bearing
retainer, enlarge this width from 30mm
to 36mm by grinding 1R292.
Remove Bearing retainer 36-43 with 1R292
by turning it clockwise.
notch for fitting
1R292
1R292
1R292
Clamp the machine
with vise.
Bearing retainer
Bearing retainer 36-43
Fig. 8
Remove Ball bearing 608ZZ
Fig. 6
Fig. 7
Remove Gear section by striking
the edge of Gear housing.
Remove Bearing box from
Spindle.
with 1R269.
Bearing box can be removed
by hand.
1R269
Bearing box
Spindle
Ball bearing
6001DDW
Spindle
Bearing box
Retaining
ring S-12
Ball bearing
608ZZ
Spiral bevel
gear 26
Spiral bevel gear 26
Ball bearing 608ZZ
Fig. 9
Fig. 10
1R291
Key 4
Spiral bevel gear 26 can
be removed by hand.
Then remove Key 4.
Retaining ring S-12
Spiral bevel
gear 26
Key 4
Remove Retaining ring S-12
with 1R291.
ASSEMBLING
Do the reverse of the disassembling steps.
Note: Do not forget to assemble Key 4 to Spindle. Refer to Fig. 10.
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P 5/ 8
Repair
[3]-3. Spur Gear 29, Spiral Bevel Gear 9
ASSEMBLING
Refer to Figs. 11 to 13.
Fig. 11
4x45 tapping screw (4pcs.)
Gear housing
Gear section
Gear housing
Gasket
Gear housing cover
Motor housing
Gear housing cover
Strike the edge of Gear housing
with plastic hammer.
Gear section can be removed
from Gear housing.
Disassemble Gear housing together with
Gear housing cover from Motor housing
by unscrewing 4x45 Tapping screw.
Remove Gear housing cover
from Gear housing by pulling
off.
Fig. 12
Disassemble Ball bearing
696ZZ from the shaft of
Ring spring 6
Ball bearing 696ZZ
Spiral bevel gear 9 with 1R269.
1R269
cut
groove of spline
Insert the pick between the groove of spline and the near point to
Ring spring’s cut. And Lever up Ring spring with the pick
Fig. 13
Strike the work table with Spur gear 29 can be disassembled
Separate Lock ring
from Spur gear 29.
Lock cam and Pin 3.5 can be
removed from Spur gear 29.
shaft end of Spiral bevel
gear 9.
from the shaft of Spiral bevel
gear 9.
Lock ring
Ball bearing
608ZZ
Lock cam
Pin 3.5
Spiral bevel
gear 9
Lock ring
Spur gear 29
Spur gear 29
Spur gear 29
ASSEMBLING
(1) Take the reverse of the disassembling steps. Refer to Figs. 13 and 12, Pay attention to Fig. 14.
(2) Mount the Gear section to Gear housing as illustrated in Fig. 15.
(3) Assemble Gear housing and Gear housing cover to Motor housing by screwing 4x45 Tapping screws. (Fig. 11)
Fig. 14
Ball bearing 696ZZ
Correct the size and form
of Ring ring 6 by pressing
the portions designated in
black arrows.
Note: Ring Spring 6 has got wider than the size it
was, due to the disassembling step. Therefore,
Correct the size and form by pressing it with
pliers after assembling to the shaft of Spiral
bevel gear 9.
Ring spring 6
Shaft of Spiral bevel gear 9
Fig. 15
Gear housing
cover
Assemble the Gear section by
pressing spur gear 29 with
1R029
Do not forget to mount
Gasket between Gear
housing cover and Gear
housing.
Spur gear 29
notch
1R029, while aligning the
protrusions of Lock ring to
the notches of Gear housing.
protrusion
Gasket
notch
Gear housing
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P 6/ 8
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-4. Motor Section
DISASSEMBLING
(1) Disassemble Gear housing and Gear housing cover from Motor housing by unscrewing 4x45 Tapping screws. (Fig. 11)
(2) Remove Motor section from Housing set (L) in the order of Figs.16 and 17.
(3) When removing Armature from Brush holder, take the steps illustrated in Figs. 18, 19 and 20.
Fig. 16
3x16 Tapping screw (5pcs.) Housing set (R)
Fig. 17
Separate Housing set (R)
from Housing set (L) by
unscrewing 3x16 Tapping
screws.
Motor Section
Brush holder complete
Armature
Yoke
unit
Remove York unit, Brush holder complete
and Armature in a set when removing
Motor section.
Link
Switch lever
Remove Switch lever and Link.
Fig. 18
Carbon brush
notch
Tail of Torsion spring
Shift the tail of Torsion spring from top of Carbon brush
to the notch of Brush holder. Now Carbon brush is free
from the pressure of Torsion spring.
Torsion spring
tail of Torsion spring
Carbon brush
notch
Fig. 19
Fig. 20
Pull off Armature from
Yoke unit.
Carbon brush
Disconnect Carbon brush from
the commutator of Armature by
pulling up.
Then disssemble Armature and
Yoke unit from Brush holder.
Armature
Armature
Carbon brush
Yoke unit
Yoke unit
Brush holder
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P 7/ 8
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-4. Motor Section (cont.)
Fig. 21R
Fig. 21F
Wrong
ASSEMBLING
Correct
Commutator
Commutator
of Armature
(1) Assemble Armature as illustrated in Fig. 21R.
Note: Pay attention to the position of notch of Yoke unit.
It has to be located on the opposite side of Commutator.
(2) Assemble Brush holder to Armature’s Commutator end.
However, still keep Carbon brush free from the pressure of
Torsion spring of Brush holder in this step.
of Armature
Notch of
Yoke unit
Notch of
Yoke unit
(2) Assemble the Motor section to Housing set (L) as illustrated
in Figs. 22 and 23.
Fig. 22
Fig. 23
Protrusion for fitting to
the notch of Yoke unit
Switch side
Housing
set (R)
Motor Section
Yoke unit
Housing set (L)
Brush
holder
complete
Armature
Brush holder
90 degrees
Heat sink
Housing
set (L)
notch for fitting
to Housing set (L)
Carbon brush
Mount Brush holder complete on
Commutator so that the angle of two
Carbon brushes can be 90 degrees as
illustrated above.
Fitting the notch of Yoke unit to the protrusion of Housing set (L),
assemble the Motor section.
[3]-5. Assembling F/R Change Lever
Fix F/R Change lever to Switch as illustrated in Fig. 24.
Fig. 24
FET
Protrusion of Switch
for fitting F/R Change
Lever’s concave
Concave of F/R change lever
for fitting to protrusion of
Switch
[3]-6. Disassembling Terminal
Flag terminal for this product is equipped with Stopper for firm connection. Remove Flag terminal as illustrated in Fig. 25.
Fig. 25
Stopper
(for firm connection of Flag Terminal)
1. While pushing Stopper with thin screwdriver,
hitch the Flag terminal with the screwdriver.
Flag terminal
2. Pull off the Flag terminal.
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P 8/ 8
Circuit diagram
Fig. D-1
When connecting Lead wires of Brush holder
complete to Switch, connect them as follows.
* Lead wire (black) to M2 Terminal
Color index of lead wires' sheath
Black
White
Red
* Lead wire (red) to M1 Terminal
Brush holder complete
Switch
Terminal
FET
Connector of
Switch
LED circuit
Switch lever side
Connector of
LED circuit
Wiring diagram
Fig. D-2
Wiring of LED Circuit
(before setting Switch and other electrical Parts)
Lead wires of LED Circuit has to be guided in Housing set (L)
as illustrated below, and fix them with Lead wire holders.
Lead wire holders
LED circuit has to be put into Housing set (L)
as illustrated below.
Connector of LED circuit is connected with
Connector of Switch in the next step.
Fig. D-3
Wiring after setting Switch and other electrical parts
Put the extra portion of
Lead wires in this place.
Fix the Lead wires of Connectors
with these Lead wire holders.
FET Heat sink
Brush holder complete
Armature
Connector of
Switch side
Yoke unit
Connector of
LED side
Terminal
Switch
Lead wire holders
Fix Lead wires of Brush holder complete with these Lead wire holders. And put the Lead
wires of Brush holder complete in the position illustrated above, expanding them between
York unit and Brush holder complete.
Put the extra portion of
Lead wires in this place.
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