Makita BFT040F Manual

Models No.
Description
PRODUCT
CONCEPTION AND MAIN APPLICATIONS
Specification
Standard equipment
Optional accessories
< Note > The standard equipment for the tool shown may differ from country to country.
P 1 / 15
TECHNICAL INFORMATION
L
H
W
BFT040F, BFT080F,
BFT122F
* Adjust grip for torque adjusting ......... 1 pc. (exclusively for Italy, USA, Canada)
* Protector ............................................. 1 pc. (exclusively for Germany)
For BFT040F, BFT080F and BFT122F
* Battery BH9020
* Battery BH9020A
* Battery BH9033
* Battery BH9033A
* Charger DC14SA
* Charger DC24SA
* Auto refresh adapter ADP03
* Protectors ( red, blue, yellow and clear )
* Adjust grip for torque adjusting
BFT040F, BFT080F, BFT122F,
BFT123F
Cordless Screwdrivers 9.6V
12V
L
H
W
BFT123F
Dimensions : mm ( " )
Width ( W )
Height
( H )
Length ( L )
Model No. BFT040F, BFT080F, BFT122F BFT123F
200 (7-7/8)
260 (10-1/4)
283 (11-1/8)
251 (9-7/8)
274 (10-3/4)
65 (2-9/16) 71 (2-13/16)
w/2.0Ah battery
w/3.3Ah battery
Specially developed for fastening works in assembling line.
Their common feature and benefits are as follows.
* New charging system
* Higher accuracy in fastening torque
* Superior handling
BHT123F (12V) is applicable to tightening at
high turning angle.
And their fastening torque range is as listed below.
Voltage
(V)
Model No.
BFT040F
BFT080F
BFT122F
BFT123F
Torque range in
hard joint : (N.m)
1 - 4
3 - 8
5 - 12
5 - 12
9.6
12
Identification
plate
Yellow
Blue
Red
BFT040F BFT080F
Ni-MH Ni-MH
BFT122F BFT123F
Model No.
Specifications
No load speed : rpm.= min-1
9.6
2.0 / 3.3
950 540 320 390
19.2 / 31.7
1.3 (2.9)
1.5 (3.3)
1.6 (3.5)
1.8 (4.0)
2.0 / 3.3
24.0 / 39.6
12
Battery
Soft joint
Hard joint
Driving shank : mm ( " )
Externally accessible brush
Net weight
: kg(lbs)
LED Job Light
Soft start
Type of cell
Voltage : V
Capacity : Ah
Energy : Wh
Torque range
: N.m (in.lbs)
w/ 2.0Ah battery
w/ 3.3Ah battery
1 - 4 (8.85 - 35.4) 3 - 8 (26.6 - 70.8) 5 - 12 (44.3 - 106)
5 - 12 (44.3 - 106)
5 - 12 (44.3 - 106)
1 - 3.5 (8.85 - 31.0) 3 - 6.5 (26.6 - 57.5) 5 - 10 (44.3 - 88.5)
Yes Yes
Yes Yes
Yes Yes
Hex 6.35 (1/4) Hex 6.35 (1/4)
For BFT123F
* Battery BH1220
* Battery BH1233
* Grip base set
* Grip 37

Repair P 2 / 15
< 1 > Lubrication
Apply MAKITA grease N. No.2 to the following portions designated by black triangle to protect
parts and product from unusual abrasion.
Gear case Internal gear 47
Lock plate
Motor
bracket
44 47 48 49 54
Position
No. Parts item
Carrier B
complete Shaft for 47 Spur gear 18
Portion
to be lubricated Amount : g
( oz )
44
Shaft for 49 Spur gear 19
47 Spur gear 18
Armature
Spur gear 9
Whole portion
Whole portion
Teeth portion which engages 49 spur gear.
48
49 Spur gear 19
54
1 (0.04)
1 (0.04)
< 2 > Disassembling bit holder section
< 3 > Assembling bit holder section
( 1 ) Remove ring spring. Then, flat washer 11, compression spring 13, sleeve and 2 pcs of steel 3 can be removed
from spindle. See Fig. 1.
( 1 ) Mount 2 pcs. of steel ball 3.
( 2 ) Mount sleeve.
( 3 ) Mount compression spring 13.
( 4 ) Mount flat washer 11.
( 5 ) Secure the above parts with spring washer to spindle.
Fig. 1
1R291
Retaining Ring S and R Pliers
Spindle
Flat washer 11
Sleeve
Steel ball 3
Steel ball 3
Compression spring 13
Head of clutch case
See Fig. 1.

Repair P 3 / 15
Fig. 2 Fig. 3
Fig. 4
Fig. 5
Fig. 6
< 4 > Disassembling spindle (as a bit holder) and clutch case
( 1 ) After removing bit holder section, remove ring 38 by unscrewing pan head screw M4x4, and clutch case cover
by unscrewing pan head screw M4x8. And then, remove compression spring 2 and switch lever. See Fig. 2.
( 2 ) Remove clutch case by unscrewing 4 pcs. of pan head screw M4x22. See Fig. 3.
( 3 ) Remove retaining ring R-21 from clutch case. And then, knock the edge of clutch case with plastic hammer.
So, spindle (as a bit holder) can be removed from clutch case. See Fig. 4.
( 4 ) Remove ring spring 11 from spindle. And then remove ball bearing 6801LLB on the ring spring 11 side.
See Fig. 5.
( 5 ) After removing ring 12, remove the another ball bearing 6801lLB. See Fig. 6.
Pan head screw M4x8
(black)
Clutch case cover
Clutch case
Compression
spring 2
Clutch case
Clutch section
Switch lever
Pan head
screw M4x22
Compression
spring 5
No.1R311
Retaining Ring Pliers
with Long Bent Nails
Retaining ring R-21
Spindle
Ring 12 Ball bearing
6801LLB
Ring spring 11 1R269
Bearing Extractor
Ball bearing 6801lLB
Ball bearing 6801lLB
Ring 12
Spindle
1R004
Retaining ring S plier
Pan head
screw M4x4 (silver)
Ring 38
< Note > Compression spring 5 can easily fall off clutch section. Be careful, not to lose compression spring 5
in this step.

Repair P 4 / 15
Fig. 7 Fig. 8 Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13
< 5 > Assembling spindle (as a bit holder) and clutch case
Ring spring 11
1R004
Retaining ring S plier
( 1 ) Set ball bearing 6801LLB on 1R035 "Bearing setting plate". Mount spindle to ball bearing 6801LLB by pressing
with arbor press. See Fig. 7
( 2 ) Mount ring 12 to spindle. See Fig. 8.
( 3 ) Set another ball bearing 6801LLB on 1R035 "Bearing setting plate". Mount spindle to the ball bearing 6801LLB
by pressing with arbor press. See Fig. 9.
( 4 ) Secure 2 pcs. of ball bearing 6801LLB and ring 12 with ring spring 11. See Fig. 10.
( 5 ) Mount the spindle section to clutch case as illustrated in Fig. 11.
( 6 ) Secure the spindle section in the clutch case with retaining ring R-21. See Fig. 12.
( 7 ) Mount clutch section to motor housing. Mount
compression spring 5 to the clutch section. Fasten
the clutch case to the motor housing with 4 pcs.of
pan head screw M4x22 See Fig. 13.
1R035
Bearing setting plate
1R036
Bearing setting plate
Ball bearing
6801LLB Ball bearing
6801LLB
Spindle
Ring 12
< Note > Do not use the used ring spring 11. It has to be always replaced with the fresh one.
1R237
Round bar for arbor
Clutch case No.1R311
Retaining Ring Pliers
with Long Bent Nails
Retaining ring R-21
Clutch case
Clutch section
Pan head
screw M4x22
Compression
spring 5

Repair P 5 / 15
Fig. 14 Fig. 15
Fig. 16
Fig. 17
Fig. 18 Fig. 19
< 6 > Disassembling clutch section
( 8 ) Mount compression spring 2 and switch lever. And secure clutch case cover with pan head screw M4x8.
See Fig. 14.
( 9 ) Secure ring 38 to clutch case with pan head screw M4x4 (silver). See Fig. 15.
Pan head
screw M4x8 (black)
Clutch case cover
Clutch case
Compression spring 2
Switch lever
Pan head
screw M4x4 (silver)
Ring 38
( 1 ) Remove ring 38 and clutch case cover referring to "< 4 > Disassembling spindle (as a bit holder) and clutch case".
( 2 ) Remove clutch section from motor housing. See Fig. 16.
Clutch section
Compression
spring 5
( 4 ) Remove adjust ring complete, compression spring 19
from spindle. See Fig.19.
( 3 ) Insert adjust grip into the hole of adjust ring complete.
Turn adjust grip anti-clockwise, until adjust ring complete
is free from the compression spring 19. See Fig. 17.
Then, lock nut M12 can be separated from adjust ring complete
by turning clockwise with your hand. See Fig. 18.
Lock nut M12
Lock nut M12
Adjust ring
complete
Compression
spring 5
Adjust grip
(Standard equipment
for some countries)
Adjust ring
complete Compression
spring 19A
Spindle

Repair P 6 / 15
(5) Insert hex wrench into the hole of spindle and hold the hex wrench with vise. Insert torx wrench T25 into
the hole of torx counter sunk head screw M5x10. And turn torx wrench T25 anti-clockwise. See Fig. 20.
(6) After removing torx counter sunk head screw M5x10, the clutch section can be disassembled in the order of
flat washer 7, steel balls 3.0, cam A and steel balls 4. See Fig. 21.
Remove steel balls 5. Then, cam B can be removed from spindle. See Fig. 22.
Torx counter sunk
head screw M5x10.
Torx counter sunk
head screw M5x10.
Hex wrench Torx wrench T25
6mm
Steel balls 3.0
(13 pcs.)
Flat washer 7
Cam A
<Note>
Pay attention, not to lose steel
balls, when disassembling.
Use the hex wrench with the
following size.
Steel ball 4
(3 pcs.)
Cam B
Steel ball 5
(3 pcs.)
Cam B
Spindle
Fig. 20
Fig. 21 Fig. 22
Fig. 23
< 7 > Assembling clutch section
(1) Before mounting, take the following steps. See Fig. 23.
1. Apply MAKITA grease N. No.2 to 3 pcs. of steel balls 5 and 3 pcs. of steel ball 4.
2. For effective adhesion, clean the screw hole of spindle and torx counter head sunk screw M5x10 with petrol.
Spindle Torx counter sunk
head screw M5x10
Screw hole for
torx counter sunk head
screw M5x10

Repair P 7 / 15
(2) Mount steel balls and cam B and cam A in the order of Fig. 24, Fig. 25, Fig. 26 and Fig.27.
(3) Before mounting, apply MAKITA grease N. No.2 to 13 pcs. of steel balls 3.0.
Assemble steel balls 3.0, flat washer 7 and torx counter sunk head screw M5x10 as illustrated in Fig. 28, Fig.29
and Fig. 30.
(4) Before mounting, apply MAKITA grease N. No.2 to threaded portion of spindle.
Assemble compression spring 19, adjust ring complete and lock nut 12 in the order of Fig. 31 and Fig. 32.
Steel balls 5
(3 pcs.)
Mount steel balls 5
to spindle. Mount cam D to spindle with aligning its 3 grooves
with steel balls 5. Mount steel balls 4
to cam B. Mount cam A.
Cam B Steel balls 4
(3 pcs.)
Steel balls 3.0
(13 pcs.)
Mount steel balls 3.0
to cam A. Mount flat washer 7
to cam A.
Pay attention, not to spot
the screw hole of spindle
with the grease, when
assembling steel balls.
Flat washer 7
Torx counter sunk
head screw M5x10
Apply here the
adhesive by 0.1CC,
before screwing.
After applying 0.1cc (3 drops) of
adhesive, "Lock tight 603" in the
screw hole, fasten flat washer 7
with torx counter sunk head
screw M5x10.
The fastening torque for the
screw is 8 - 10 N.m.
Compression
spring 19
Adjust ring
complete
Fig. 31 Lock nut 12
Pressing lock nut 12 strongly, turn adjust grip
clockwise. Then, lock nut M12 turns anti-clockwise
and fastened to spindle.
Fig. 32
Fig. 24 Fig. 25 Fig. 26 Fig. 27
Fig. 28 Fig. 29 Fig. 30
Cam A

Repair P 8 / 15
< 8 > Disassembling motor section and gear section
Fig. 33
Fig. 34 Fig. 35
Fig. 36
( 1 ) Remove ring 38, and clutch cover from housing referring to "< 4 > Disassembling spindle (as a bit holder)
and clutch case".
( 2 ) After removing brush holder caps, carbon brushes and clutch section, separate housing L from housing R
by unscrewing 8 pcs. of pan head screw M3x20. See Fig. 33.
( 3 ) Remove gear section with motor section from housing R .
( 4 ) Turn motor bracket anti-clockwise. So gear section can be separated from motor section. See Fig. 35.
( 5 ) Remove endbell from motor armature. And then, pull armature from yoke unit. See Fig. 36.
Brush holder
cap
Brush holder
cap
Carbon brush
Carbon brush
Clutch
section
Compression spring 5
Pan head
screws M3x20
Housing L
Housing R Plate
Lens
Gear section
Motor section
See Fig. 34.
Motor bracket
Gear section
End bell
Armature Armature
Yoke unit Yoke unit
<Note>
Be careful, not to be pinched your finger
between yoke unit and armature.
Because, armature is pulled toward yoke
unit by the strong magnetic force.

Repair P 9 / 15
( 6 ) Turn lock washer, and pull off it. See Fig. 37.
( 7 ) Then, gear section can be disassembled as illustrated in Fig. 38 and Fig. 39.
< 9 > Assembling motor section and gear section
Fig. 37 Fig. 38 Fig. 39
Fig. 40 Fig. 41 Fig. 42 Fig. 43
Fig. 44 Fig. 45 Fig. 46
Spur gear 9
complete
Spur gear 19 x 3 pcs.
Spur gear 18 x 3 pcs.
Carrier
complete B
Internal gear 47
Gear case
Ball bearing
6805LLB
( 1 ) Referring to "< 1 > Lubrication", apply MAKITA grease N No.2 to the gears and shaft portions of spur gear 9
and carrier complete B.
( 2 ) Mount ball bearing 6805LLB and carrier complete B to gear case. See Fig. 40
( 3 ) Mount internal gear 47 to the gear case. See Fig. 41.
( 4 ) Engaging internal gear 47, mount 3 pcs. of spur gear 18 to the shaft portion of carrier complete B. See Fig. 42.
( 5 ) Engaging spur gears 18, mount spur gear 9 complete. See Fig. 43.
( 6 ) Engaging internal gear 47, mount 3 pcs. of spur gears 19 to the shaft portion of spur gear 9 complete.
See Fig. 44.
( 7 ) Mount lock washer to the gear case by turning.
( 8 ) Mount motor bracket to the gear case by turning clockwise. The assembling of gear section has been completed
in this step.
Ball bearing
6805LLB
Carrier
complete B
Gear case
Gear case
Internal
gear 47
Spur gear 18 Spur gear 9
complete
Spur gear 19
Lock washer
Lock washer
Motor bracket

Repair P 10 / 15
Fig. 47
Fig. 48
Fig. 49 Fig. 50
( 9) Insert armature in yoke unit. And mount endbell to the commutator side of armature. See Fig. 47.
The assembling of motor section has been completed in this step.
(10) Join the motor section to the gear section. See Fig. 48.
(11) Facing switch unit to the plate installing side, mount the motor and gear section to housing R.
and put ON/OFF switch with F/R change lever, buzzer circuit and terminal into housing R.
Contain LED circuit into housing R. See Fig. 49.
(12) Mount plate and lens. And secure housing L with 8 pcs. of pan head screw M3x20. See Fig. 50.
End bell
Armature
Yoke unit
<Note>
Be careful, not to be pinched your finger
between yoke unit and armature.
Because, armature is pulled toward yoke
unit by the strong magnetic force.
Gear section Motor section
Controller
Switch unit
F/R change lever
ON/OFF switch
Buzzer circuit
Terminal
Plate
Lens
Housing L
LED circuit

Repair P 11 / 15
< 12 > Replacing switch unit, LED circuit and buzzer circuit
< 12 >
< 13 >
< 14 >
< 15 >
< 16 >
< 17 >
< 18 >
< 19 >
< 20 >
< 21 >
< 22 >
< 23 >
< 24 >
Fig. 51
Fig. 52
Fig. 53
Fig. 54
Fig. 55
Fig. 56
Fig. 57
Fig. 58
Fig. 59
Fig. 60
Fig. 61
Fig. 62
Fig. 63
Fig. 64
< 10 > Disassembling switch
(1) After removing F/R change lever, unscrew the screw with which micro switch is secured, and turn the micro
switch with pulling up as illustrated in Fig. 51.
Then, micro switch can be separated from switch.
< 11 > Assembling switch
(1) Secure micro switch to the ON/OFF switch, and fasten it with the screw, with fastening torque of 0.29 - 0.34N.m.
(2) Mount F/R change lever aligning its concave portion with the boss of ON/OFF switch. See Fig. 52.
(3) Mount the switch to housing R. See Fig. 53.
Screw
Micro switch
ON/OFF switch
Turning anti-clockwise,
pull off the micro switch.
F/R change lever
Concave portion
of F.R. change lever Boss of ON/OFF switch
Connected to
controller
LED circuit
Buzzer circuit
Switch unit
Connector Connector
Connector
(1) When removing LED circuit, Switch unit and Buzzer circuit, pull off the connector in the direction designated
with arrow. See Fig. 54.
(2) Connect the connectors referring to the
"Circuit Diagram".
< Note > To avoid the disconnection of lead wires, do not hold the lead wires, when removing the above parts.
Always hold the connectors themselves.

LED
Circuit
Switch
unit
Buzzer
Circuit
Circuit diagram P 12 / 15
Color index of lead wires
Black White
Red
Orange Blue
Yellow
Purple Gray
M
DC Motor
( End bell )
Terminal
Controller
Indicator lamp
is built in the
controller.
COM NO
Micro Switch
ON/OFF
Switch
M2
S1
S2
M2
M1
Switch section
Connector
Connector
Connector
Shrink tube

Wiring diagram P 13 / 15
Wiring in housing (9.6V models BFT040F, BFT080F and BFT122F ) Pass the endbell lead wires (black and
red) both sides of LED cover portion
of controller.
LED cover
portion
Endbell
lead wire
(black)
Endbell lead
wire (red)
Pass the following lead wires
between the ribs of switch.
* Controller's lead wires (white
and orange) to be connected
to micro switch.
* Controller's lead wires (blue,
purple and white) to be
connected to reverse switch.
* Controller's lead wires (red
and white) to be connected
to buzzer circuit.
Connector
Terminal
Buzzer circuit has to be so mounted,
that the sponge side is faced to the
housing L side.
The connector has to be put
on the terminal side of this line
as illustrated.
Pass the following lead wires
between rib and the wall of
housing.
* Terminal lead wires
(black and red)
* Buzzer circuit lead wires
(white and red)
Buzzer
circuit
LED circuit
Controller
Switch unit
Switch
Rib
Rib
Pay attention, not to pinch the
above lead wires between switch
and housing.
Put the following lead
wires out of housing.
* Controller lead wires
(gray and blue) for
connecting to LED
circuit
* Controller lead wires
(purple and yellow) for
connecting to switch
unit
Refer to "Wiring on the
switch unit" in detail
on the page 15.
Refer to "Wiring on the
switch" in detail on the
page 15.
1
2

Wiring diagram P 14 / 15
Wiring in housing (12V model BFT123F) Pass the endbell lead wires (black and
red) both sides of LED cover portion
of controller.
LED cover
portion
Endbell
lead wire
(black)
Endbell lead
wire (red)
Pass the following lead wires
between the ribs of switch.
* Controller's lead wires (white
and orange) to be connected
to micro switch.
* Controller's lead wires (blue,
purple and white) to be
connected to reverse switch.
* Controller's lead wires (red
and white) to be connected
to buzzer circuit.
Connector
Buzzer circuit has to be so mounted,
that the sponge side is faced to the
housing L side.
The connector has to be put
on the terminal side of this line
as illustrated.
Pass the following lead wires
between rib and the wall of
housing.
* Terminal lead wires
(black and red)
* Buzzer circuit lead wires
(white and red)
Buzzer
circuit
LED circuit
Controller
Switch unit
Switch
Rib
Rib
Pay attention, not to pinch the
above lead wires between switch
and housing.
Put the following lead
wires out of housing.
* Controller lead wires
(gray and blue) for
connecting to LED
circuit
* Controller lead wires
(purple and yellow) for
connecting to switch
unit
Refer to the wiring on the
switch unit in detail
on the next page.
Refer to the wiring on the
switch in detail on the next
page.
1
2
Terminal

Wiring diagram P 15 / 15
1. Wiring on the switch unit (BFT040F, BFT080F, BFT122F, BFT123F)
2. Wiring on the switch (BFT040F, BFT080F, BFT122F, BFT123F)
Switch unit
Top view of switch unit
Switch unit
Pass the lead wires, covered by shrink tube,
through the pin.
And hold them with lead holders at clutch case.
Clutch case
Lead holder
Contain the slack portion
of lead wires and connectors
into this pace.
Controller lead
wire (white)
Controller lead
wire (white)
Controller lead
wire (purple)
Controller lead
wire (orange)
Controller lead
wire (blue)
Endbell lead
wire (black)
Endbell lead
wire (red)
View from micro switch side
Micro switch
Lead holder
Hold the controller lead
wire (white) with lead holder.
View from ON/OFF switch side
ON/OFF
switch side
Micro
switch side
Pin