Makita BFS440 Manual

PRODUCT

CONCEPT AND MAIN APPLICATIONS

P 1/ 7

Specification

BFS440, BFS450

Cordless Screwdriver

Models BFS440 and BFS450 have been developed as a single-shot type

Cordless Screwdriver, featuring more convenience with one-touch locator

and LED job light.

These products are available in the following variations.

Dimensions: mm (")

Width (W)

Height (H)

Length (L) 258 (10-1/8)*1

80 (3-1/8)

193 (7-5/8)

Specification

Net weight*3: kg (lbs) 1.7 (3.8) 1.9 (4.2)

Model BFS450BFS440

4 (5/32)Diameter

4,000No load speed: min.-1 = rpm

Driver bit: mm (")

Capacities: mm (")

[drywall]

LED job light

6.35 (1/4) HexShank

Yes

Reverse switch Yes

*2. 1.5Ah: Battery BL1415 or BL1815; 3.0Ah: Battery BL1430 or BL1830

*3. BFS440: includes battery BL1430; BFS450: includes battery BL1830

Battery

Cell

Voltage: V

Capacity: Ah

Li-ion

14.4 18

1.5 or 3.0*2

Max output: W 235 325

(The image above is BFS450.)

All models also include the accessories listed in "Standard equipment".

BFS440

BFS440RFE

BFS440Z

BL1430

(Li-ion 3.0Ah) DC18RA

No No

Model No. type quantity Charger

Yes

Plastic

carrying case Offered to

All countries except North America

Battery

BFS450

BFS450RFE

BFS450Z

BL1830

(Li-ion 3.0Ah) DC18RA

No No

Yes

Makita-blue

Housing color

Makita-blue All countries except North America

Standard equipment

Optional accessories

Note: The standard equipment for the tool shown above may differ by country.

Phillips bit 1-25

Phillips bit 2-25

Phillips bit 3-25

Phillips bit 2-25 ...................... 2

Belt clip ................................... 1

Magnetic connect bit 6.35-60 (Magnetic connect bit 6.35-76) ...................... 1

Fast charger DC18RA

Charger DC24SA (for North America only)

Charger DC24SC (for all countries except North America)

*1. It differs by country.

Magnetic connect bit 6.35-60

Magnetic connect bit 6.35-76

Batteries BL1430, BL1415 (for BFS440)

Batteries BL1830, BL1815 (for BFS450)

TECHNICAL INFORMATION

Models No.

Description

P 2/ 7

[2] LUBRICATION

Apply Makita grease FA.No.2 to the following portions designated with the black triangle to protect parts and product

from unusual abrasion.

[1] NECESSARY REPAIRING TOOLS

CAUTION: Remove the bit and the battery from the machine for safety before

repair/ maintenance in accordance with the instruction manual!

Fig. 1

Repair

DescriptionCode No. Use for

Item No. Description Portion to lubricate Amount

a little

Each depressed portion for Steel ball 4

Spindle

Clutch cam C

Gear complete 18-44

Armature

Shoulder pin 8-10

Flat washer 25 Whole portion

(a)

(c)

(a) The drum portion that contacts Plane bearing 14

(d) The Drum portion that contacts 24 Clutch cam C

(e) Teeth of the small gear that engages Helical gear 48

(f) Teeth of the large Gear that engages Armature's gear

(b) The Cam portion that contacts 24 Clutch cam C

(b)

(e)

(f)

Bearing extractor1R269 Removing Ball bearing 608

Plane bearing 14 Makita grease FA.No.2

20 21

(d)

Ball bearing 608

Helical gear 48

Steel ball 4.0

P 3/ 7

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -3. Locater Section

[3] DISASSEMBLY/ASSEMBLY

[3] -4. Helical Gear 48, Clutch Section

DISASSEMBLING

ASSEMBLING

Pull Lock ring strongly. Locater complete and Lock ring can be removed together.

When removing Locater base complete together with Locater complete and Lock ring, etc.:

1 Loosen 4x18 Tapping screws (2 pcs.) and remove Front cover.

2 Loosen M4x25 Pan head screw and pull Locater base complete. (Fig. 2)

Locator section can be removed as illustrated in Fig. 3.

Fig. 2

Fig. 4 Fig. 5

Fig. 3

Do the disassembling step in reverse.

Fig. 7Fig. 6

M4x25

Pan head screw

M4x25 Pan head screw

4x18 Tapping screws (2 pcs.)

Front cover

Locater base complete

Leaf spring Ring spring 33 Dust seal ring

Brake pin

Lock ring

Locater complete

1) Pull Lock ring strongly. Locater complete and Lock ring can be removed together.

2) Loosen 4x18 Tapping screws (9 pcs.) and remove Housing R. (Fig. 4)

3) Separate an assembly of Helical gear 48 and Clutch cam, etc. (Fig. 5) from Housing L and remove Ball bearing 608

with 1R269.

4) Remove Leaf spring by hooking and turning it with Long nose pliers. (Fig. 6) Do not lose Steel ball 3.5 on Spindle.

The assembly (Re: Fig. 5) can be removed by hand as illustrated in Fig. 7.

Housing R

4x18 Tapping screws (9 pcs.)

Assembly of Helical gear 48 and Clutch cam, etc.

Leaf spring Ball bearing

608

Steel ball 4

(3 pcs.)

Steel ball 4

O ring 18 Leaf spring

Helical

gear 48 Clutch cam C Compression spring 25 Shoulder pin 8-10

Long nose

pliers

Spindle

Ball bearing 608

Flat washer 26 Spindle Sleeve 20 Plane bearing 14Flat washer 25

(2 pcs.)

P 4/ 7

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -4. Helical Gear 48, Clutch Section (cont.)

ASSEMBLING

Fig. 9

Fig. 10

Fig. 11

Ball bearing 608

Steel ball 4

(3 pcs)

Steel ball 3.5

Clutch cam C Helical gear 48

Assembly of Helical gear 48

Spindle

Shoulder pin 8-10

Flat washer 25 (2 pcs)

Sleeve 20

O Ring 18

Plane bearing 14

Gear complete 18-44

Plane bearing 5

(front)

Rubber sleeve 10

Plane bearing 5

(rear)

Flat washer 5

5) Assemble the parts illustrated below into Clutch section.

6) Assemble Gear section to Housing L.

Note: Do not forget to put Flat washer 5 between

Gear complete 18-44 and Plane bearing 5

(front).

4) Put each Steel ball 4 in the concave portion on the inside wall

of Clutch cam C.

Then assemble Clutch cam C to Helical gear 48.

Note:

Apply Makita grease FA.No.2 to the specific portions of

Spindle and Shoulder pin 8-10 illustrated in Fig. 1.

Fig. 8

1) Put Flat washer 26 on the flanged portion of

Clutch cam C.

Note: Make sure that there is no space between

Flat washer 26 and the flanged portion.

2) While turning Compression spring 25

in the direction of the arrow, push it down

until it touches Flat washer 26.

Compression spring 25

Flat washer 26

Clutch cam C

Taking the steps described in Fig. 8 to 11.

3) Apply Makita grease FA No.2 to

the inside wall of Clutch cam C

to prevent Steel Ball 4 (3 pcs.)

from falling off from Clutch cam C.

P 5/ 7

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -5. Motor Section

DISASSEMBLING

1) Remove Housing R (Fig. 4)

2) Disassemble Armature from the machine as illustrated in Figs. 12 and 13.

ASSEMBLING

Fig. 15Fig. 14

Your fingers will be pinched

and injured.

[Wrong][Correct]

Fig. 12 Fig. 13

Carbon

brush

Carbon

brush

Torsion

spring

1. Move the tail of Torsion spring

onto the notch of Brush holder.

2. Then pull off Receptacle from

Brush holder, then remove

Carbon brush.

Brush holder

complete

Yoke unit

Armature

1) Insert Armature into Yoke unit as described in Figs. 14 and 15.

2) Assemble Brush holder complete to the commutator end of Armature. (Fig. 12)

Because Yoke unit is a strong magnet, when assembling Armature

to Yoke unit, be sure to hold the commutator portion as illustrated

to left. Do not hold the Armature core as illustrated to right

or your fingers will be pinched between Yoke unit and the fan of

Armature that is pulled strongly by the magnet force.

Yoke unit is not reversible when assembled

to Armature.

Be sure to assemble so that the notch in

Yoke unit is positioned on the drive-end

of Armature.

If assembled wrong, the Motor section

cannot be assembled to Housing L.

[Wrong][Correct]

notch

Gear

P 6/ 7

Repair

[3] DISASSEMBLY/ASSEMBLY

[3] -5. Motor Section (cont.)

Fig. 16

ASSEMBLING

[3] -6. Switch

3) Assemble the Motor section to Housing L as illustrated in Fig. 16.

Put the projection on Switch between the prongs of F/R change lever,

then assemble the Switch to Housing L. (Fig. 17)

notch in Yoke unit Brush holder complete

groove

Housing L

rib

ASSEMBLING

With the projection on Housing L fitting in the notch on Yoke unit,

put Yoke unit inside the four ribs on Housing L.

Fig. 17

F/R change lever

Switch projection

prong

1) Fit Brush holder complete in the groove

of Housing L.

2) The flat portion of Brush holder complete

must be at 90 degrees to the edge surface

of Housing L.

flat portion of Brush holder complete

edge surface of

Housing L

Brush holder complete

viewed from Front cover side

90 degrees

Assembling Brush Holder to Housing L

projection

Assembling Yoke Unit to Housing L

P 7/ 7

Circuit diagram

Wiring diagram

Brush Holder

Complete

LED

Fig. D-1

Fig. D-2

Lead wires (red, black) of Brush holder complete

must be fixed with these lead wire holders.

Do not put any

Lead wire on

this rib to protect

from pinching.

Yoke unit

Circuit

Switch

Terminal

Color index of lead wires' sheath

Black

White

Red

Blue

Switch lead wires (red, black)

must be passed between rib A and rib B.

rib A

LED

rib B

Switch lead wires

(red, black) must be

fixed with these

Lead wire holders.

Brush holder

complete

Terminal

Switch

The flag connector must be so connected that

the wire connecting portion is positioned on

the side of pole marks of Terminal.

Flag connector

Terminal

Connecting Flag Connector

to Terminal

Wire connecting portion

Pole mark

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