Makita BFT043F Manual

Specification

Standard equipment

Optional accessories

Battery BL1430

Battery BL1430A

Fast charger DC18RA

Charger DC18SD

Charger DC24SC

Automotive Charger DC18SE

Auto refresh adapter ADP03

Battery protector (for BL1430A)

Protectors (red/ blue/ yellow/ clear)

Torque adjust tool

Grip base (for Grip 37)

Grip 37 (Side grip)

Anti-kickback head for Spindle M

Anti-kickback head for Spindle N

BFT043F BFT083F BFT125F

Model

Specifications

No load speed: rpm= min-1 80 150

25 65

1.5 (3.3)

Battery

Driving shank: mm (")

Weight according to

EPTA-Procedure 01/2003*: kg (lbs)

LED Job light

Torque adjustment

Reversing switch

Electric brake

Soft start

Torque range: N.m (in.lbs) 1 - 4 (8.9 - 35) 3 - 8 (27 - 71) 5 - 12 (44 - 106)

Yes

Hex 6.35 (1/4)

Cell

Voltage: V

Capacity: Ah

Li-ion

14.4

3.0

Max output: W

*with Battery BL1430

Model No.

Description

PRODUCT

CONCEPT AND MAIN APPLICATIONS

P1/ 14

BFT043F, BFT083F, BFT125F

Cordless Screwdrivers 14.4V

These three cordless screwdrivers for fastening works in assembling line

have been developed as sister models of BFT040F series.

Additionally to the same tool durability and high fastening torque accuracy

as the current series models, these products feature low rotational speed for

soft joint applications such as fastening rubber parts; gaskets, hoses, etc.

These products are powered by 14.4V/ 3.0Ah Li-ion batteries

BL1430/ BL1430A*.

These products are available in the following specifications

with the model numbers described below.

BFT125FZ

BFT043FZ

BFT083FZ

5 - 12 (44 - 106)

1 - 4 (8.9 - 35)

3 - 8 (27 - 71) No No

Model No. Torque range:

N.m (in.lbs) type quantity Charger

Battery

cover

Battery

*Not compatible with 14.4V/1.3Ah Li-ion battery BL1415

TECHNICAL INFORMATION

Dimensions: mm (")

Width (W)

Height (H)

Length (L) 200 (7-7/8)

255 (10)

72 (2-13/16)

P 2/14

1R004 Retaining ring S pliers ST-2

1R035

1R036

Bearing setting plate 15.2 installing Ball bearing 6801LLB and Ring 12

assembling Spindle section to Clutch case

Bearing setting plate 17.2

1R237 Round bar for arbor 8-100

1R269

1R288

1R291 Retaining ring S and R pliers

1R145

1R219

1R220 Ratchet head 9.5 (1R219)

1R222

765027-4

1R314

1R311 Retaining ring pliers with long bent nails

Code No. Description Use for

BFT125FBFT043F

Model No.

Description

Item No.

Ring 38 Ring 38G Ring 38IRing 38H

Spindle M/ N Either Spiindle M or Spindle N is used. It differs from country to country.

Compression spring 19 Compression spring 19D Compression spring 19E Compression spring 19C

Cam C/ A Cam C

Clutch ass’y D Clutch ass’y F Clutch ass’y G

Cam A

Armature

Clutch ass’y (as an option

for quick repair of Clutch

section) consists of Item Nos.

Part No.619265-9 Part No.619267-5

BFT083F

Repair

[1] NECESSARY REPAIR TOOLS

removing/installing Ring spring 11

removing M5x10 Torx countersunk head screw from Spindle

L type Torx wrench set

Torx wrench shaft 7-23N.m

tightening M5x10 Torx countersunk head screw to Spindle

Socket adapter (1R219)

Bearing extractor removing Ball bearing 6801LLB and Ring 12 from Spindle

removing Steel balls

removing/installing Ring spring 10 from/on Spindle M/ N

removing Retaining ring R-21

assembling M5x10 Torx countersunk head screw to Spindle

disassembling Clutch section

Torque adjust tool

Torx bit VT-25

Screwdriver magnetizer

CAUTION: Repair the machine in accordance with “Instruction manual” or “Safety instructions”.

Note: Some parts numbers and descriptions differ from model to model. Refer to the following list and replace the

descriptions in this technical information. (for example, Cam C/ A means Cam C or Cam A.)

Plate Plate G Plate IPlate H1

32 33 43 34 35 36 37

38 39 40 41 42 62

P3/14

Item No. Description Lubricant Amount

2g in total

a little

Portion to lubricate

Item No. Description

: Makita grease N. No.2 (2g)

: ThreeBond 1303 or Loctite 603

: Seal lubricant No.101

Compression spring 19

Cam D

Gear case

Spindle

Steel ball 5.0 (3pcs.)

Steel ball 4 (3pcs.)

Steel ball 3 (13pcs.)

Spindle

Cam A/ C

Carrier complete B

Spur gear 18 (3pcs.)

Spur gear 9 complete B

Spur gear 19 (3pcs.)

Internal gear 47

Three shaft pins for 47

47 49

Repair

Apply the following lubricants to protect parts and product from unusual abrasion (Fig. 1):

Apply ThreeBond 1303 or Loctite 603. (Fig. 1)

[2] LUBRICANT AND ADHESIVE APPLICATION

LUBRICANT

Threaded portion for engaging with M12 Lock nut Seal lubricant

No.101

(042010-1A: 100g)

Whole surface

Teeth portion that engages with and

Teeth portion

Teeth portion and three shaft pins for

Teeth portion

Portion to apply adhesive

Inner threaded portion for M5x10 Torx countersunk head screw

Ball bearing

6805LLB

Lock washer

Motor bracket M5x10 Torx countersunk head screw

Flat washer 7

Fig. 1

Makita grease

N. No.2

ADHESIVE

P4/ 14

Fig. 5 Fig. 6 Fig. 7

[3] -2. Spindle Section

Clutch case

Compression spring 5

Clutch section

Spindle section

Fig. 3

M4x4 (+) Pan head

screw (silver)

Ring 38

Clutch case cover

Clutch case

DISASSEMBLING

Steel ball 3 (2pcs.)

Compression spring 13 Spindle M/ N

Ring spring 10

Fig. 2

M4x8 Pan head screw (black)

Switch lever

Compression spring 2

Fig. 4

M4x22 (+) Pan head screw (4pcs.)

Clutch case

Clutch section

(= Clutch ass’y)

Housing

Retaining ring R-21

1R311

Clutch case

Switch unit

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -1. Bit Holder Section

Bit holder section can be disassembled from Spindle M/ N

by removing Ring spring 10 from the groove of Spindle M/ N

by using 1R291. (Fig.2)

Flat washer 11 Sleeve

groove

(1) Disassemble Bit holder section from Spindle M/N. (Refer to [3] -1. Bit Holder Section.)

(2) Remove Ring 38 from Clutch case by unscrewing M4x4 (+) Pan head screw (silver),

then remove Clutch case cover from Clutch case by unscrewing M4x8 Pan head screw (black).

Switch lever and Compression spring 2 can be removed now. (Fig. 3)

(3) Remove Clutch case from Housing by unscrewing four M4x22 (+) Pan head screws.

Clutch section (= Clutch ass’y) now can be removed from Housing. (Fig. 4)

Note:Be careful not to lose Compression spring 5 located in Clutch section.(Fig. 5)

(4) Remove Retaining ring R-21 that holds Spindle section in place on Clutch case using 1R311. (Fig. 6)

(5) Remove Spindle section from Clutch case by tapping the end surface of Clutch case with plastic hammer. (Fig. 7)

P5/ 14

Ring 12

Ball bearing

6801LLB

1R269

Ring spring 11

1R004

Ring 12

Ball bearing

6801LLB

Spindle M/ N

Ball bearing

6801LLB

1R035

Spindle M/N

Ball bearing

6801LLB

1R311

Retaining ring R-21

1R237

Clutch case

Spindle M/ N

section

DISASSEMBLING

ASSEMBLING

1R269

arbor press

Ring spring 11

1R004

arbor press

1R036

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -2. Spindle Section

(6) Remove Ring spring 11 with 1R004. (Fig. 8)

(7) Remove Ball bearing 6801LLB with 1R269. (Fig. 9)

(8) Remove the other Ball bearing 6801LLB together with Ring 12 by using 1R269. (Fig. 10)

Fig. 8 Fig. 9 Fig. 10

(1) Assemble Spindle M/ N section by using 1R035, arbor press and 1R004. (Figs. 11 and 12)

Note: Ring spring 11 is deformed in the disassembling step.

Be sure to use new Ring spring 11 when assembling Spindle M/ N section. (Fig. 12)

(2) Assemble Spindle M/ N section to Clutch case by using 1R237, 1R036, arbor press and 1R311. (Fig. 13 and 14)

Fig. 11 Fig. 12

Fig. 13 Fig. 14

Fit Retaining ring 21 exactly

into this inner groove to hold

Spindle M/ N section securely.

P6/ 14

[3] -3. Clutch Section

Compression

spring 19

Compression spring 19

Adjust ring complete

Cam D

Steel ball 4

(3pcs.)

Steel ball 5.0

(3pcs.)

Cam C/ A

Steel ball 3

(13pcs.)

Cam A/ C

M12 Lock nut

Adjust ring complete

Clutch section

(=Clutch ass’y)

ASSEMBLING

DISASSEMBLING

765027-4

M12 Lock nut

Spindle

Cam D

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -2. Spindle Section (cont.)

(3) Make sure that Compression spring 5 is located in place in Clutch section before assembling Clutch section and

Clutch case to Housing. (Fig. 5)

(4) Assemble Clutch section and Clutch case to Housing by screwing four M4x22 (+) Pan head screws. (Fig. 4)

Then put the Lead wires of Switch unit and LED Job light in place as illustrated in Fig. D-3.

(5) Put Switch lever and Compression spring 2 in the space between Switch unit and Clutch case. (Fig. 3)

(6) Secure Clutch case cover to Clutch case with M4x8 Pan head screw (black). Then secure Ring 38 to Clutch case

with M4x4 (+) Pan head screw (silver). (Fig. 3)

It is recommended to wholly replace Clutch section with Clutch ass’y when it is broken.

However, if you need to replace some component part(s) of Clutch section independently,

disassemble/assemble Clutch section as described below.

(1) Take out Clutch section. (Figs. 3 and 4)

Note: Be careful not to lose Compression spring 5. (Fig. 5)

(2) Insert 765027-4 into the hole of Adjust ring complete, and turn it counterclockwise to reduce the tension of

Compression spring 19. M12 Lock nut (left-hand threaded) can now be removed by turning it in the direction of

the black arrow by hand. (Fig. 15)

(3) Remove Adjust ring complete, Flat washer 18 and Compression spring 19 from Spindle. (Fig. 16)

(4) The following Steel balls can be removed as drawn in Fig. 17:

Steel ball 3 (13pcs.), Steel ball 4 (3pcs.), Steel ball 5.0 (3pcs.)

Note: Use a screwdriver magnetized by 1R288 for easy removal of Steel balls.

Fig. 15 Fig. 16

Flat washer 18

Fig. 17

Steel ball 4 (3pcs.) and Steel ball 5.0 (3pcs.)

can be removed by moving Cam D towards

the threaded end of Spindle.

After removing Steel ball 4 (3pcs.) and Steel ball 5.0 (3pcs.),

Steel ball 3 (13pcs.) can be removed by moving Cam C/ A

towards Cam D.

P7/ 14

Fig. 18

Fig. 19

DISASSEMBLING

6mm

Spindle

Flat washer 7Cam C/ ACam D

Spindle

ASSEMBLING

Spindle

1R219

1R220

1R222

1R314

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -3. Clutch Section (cont.)

(5) Insert short leg of hex wrench 6 into the hole of Spindle, and fix long leg of the hex wrench securely in vise.

Insert No.T25 Torx wrench of L type Torx wrench set (1R145) into the socket of M5x10 Torx countersunk head screw.

Then remove the screw by turning No.T25 Torx wrench counterclockwise as illustrated to left in Fig. 18.

The following parts can be removed from Spindle: Cam D, Cam C/ A, Flat washer 7. (right in Fig. 18)

M5x10 Torx countersunk

head screw

No.T25 Torx wrench

M5x10 Torx countersunk

head screw

Do the reverse of the disassembling steps.

Note: When fastening M5x10 Torx countersunk screw to Spindle, do as described in Fig. 19.

Apply Sealing lubricant No.101 to all Steel balls and the Spindle's threaded portion before assembling.

(Fig. 1) Be careful not to put the grease in the threaded hole of Spindle and Torx screw.

M5x10 Torx countersunk head screw

Clean up this threaded portion

with gasoline or kerosene to

remove oil or grease.

Clean up this threaded hole

with gasoline or kerosene

to remove oil or grease from

the inner threaded portion.

Put about three drops of

ThreeBond 1303 or Loctite 603

in this threaded hole.

Fix Spindle in vise. Then fasten M5x10 Torx countersunk

head screw to the recommended torque of

8-10N.m by turning clockwise by using 1R219,

1R220, 1R222 and 1R314.

Note: Wipe away any adhesive that might ooze out.

Hex wrench 6

P 8/ 14

Gear section

Motor section

DISASSEMBLING

Plate

Lens

Housing (R)

Brush holder cap

Carbon brush

Housing (L)

Gear section

Switch unit

Switch

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -4. Motor and Gear Section

(1) Remove Bit holder section, Switch lever, Clutch case and Clutch section (=Clutch ass’y) from Housing.

(Figs. 2, 3 and 4)

(2) After removing Brush holder cap and Carbon brush, remove Housing (L) from Housing (R) by loosening

eight M3x20 Pan head screws. Then remove Switch unit from Gear section. (Fig. 20)

(3) Disconnect Lead wires of Endbell complete from Switch, then lift up and remove the assembly of Gear section and

Motor section from Housing (R). Pull off Gear section from Motor section while turning Motor bracket in the direction

of the arrow. (Fig. 21)

Fig. 20

Fig. 21

Pan head screw

M3x20 (8pcs.)

Lead wire of

Endbell complete

Motor bracket

P 9/14

ASSEMBLING

Carrier complete B

Internal gear 47

Gear case

pliers

Endbell complete

Armature

Gear case

Disassembling Motor Section Disassembling Gear Section

Spur gear 9 complete B

Gear case Internal gear 47

DISASSEMBLING

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -4. Motor and Gear Section (cont.)

(4) Remove Endbell complete from Armature, then pull Armature from Yoke unit. (Fig. 22)

(5) Remove Lock washer by turning it with pliers. Gear section now can be disassembled as drawn in Fig. 23.

Fig. 22 Fig. 23

Note:

Be careful not to pinch your fingers between

Armature and Yoke unit when removing/

installing Armature because Yoke unit has

strong magnetic force and pulls Armature

very strongly.

Yoke unit

Lock washer

Carrier complete B Spur gear 19

(3pcs.)

Ball bearing

6805LLB

Spur gear 18

(3pcs.)

(1) Apply Makita grease N No.2 (2g) to teeth portions of all Gears and all Shaft pins portion of the Carrier complete B

and Spur gear 9 complete B. (Fig. 1)

(2) Assemble Gear section as drawn in Figs. 24 and 25.

Fig. 24

Fig. 25

Lock Motor bracket in place

by turning clockwise.

Motor bracket

Lock washer

Spur gear 9

complete B

Spur gear 19

(3pcs.)

Shaft pins for

Spur gear 18

Shaft pins for

Spur gear 19

Spur gear 18

(3pcs.)

Ball bearing

6805LLB

P10/14

ASSEMBLING

Gear section

Switch unit

Housing (R)

Motor section

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -4. Motor and Gear Section (cont.)

3) Assemble Motor section. (Fig. 22)

Assemble Motor section and Gear section together while

turning Motor bracket in the direction of the arrow.

Then install Switch unit on Gear case, and connect Lead

wires of Endbell complete to Switch. (Fig. 26)

4) Put the assembly of Gear section and Motor section

in place on Housing (R), then fasten Housing (L) to

Housing (R) as drawn to left in Fig. 22.

Note:

Do not forget to install Plate and Lens on Housing (R).

See Figs. D-2 and D-3 for detailed information on wiring.

Note:

Ribs to hold Switch unit must face

the top side of the machine.

Fig. 26

ribs to hold

Switch unit

Motor bracket

Lead wire

of Endbell complete

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