Makita BDF441 Manual

PRODUCT

TECHNICAL INFORMATION

P 1 / 7

Model No.

Description

CONCEPT AND MAIN APPLICATIONS

Specification

Standard equipment

Optional accessories

Dimensions: mm (")

Width (W)

Height (H)

Length (L) 238 (9-3/8)

78 (3-1/16)

255 (10)

BDF441

Cordless Driver Drill 13mm (1/2")

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

Battery

Capacity of drill chuck: mm (")

Capacity: mm (")

Max. clutch torque: N.m (ft.lbs)

Electric brake

Variable speed control

Reversing switch

Max. fastening

torque: N.m (ft.lbs)

Torque setting

Steel

Wood

Soft joint

Hard joint

No load speed:

min-1=rpm

Cell

Voltage: V

Capacity: Ah

1st/ 2nd/ 3rd

Charger DC14SA

Charger DC14SC

Charger DC18SC

Charger DC24SA

Charger DC24SC

Li-ion battery BL1430

Assorted drill bits for wood

Assorted drill bits for metal

Philips bit 2-45 ....... 2 pc

Bit holder................ 1 pc

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

Grip assembly.......... 1 pc Plastic carrying case ..... 1 pc

+ Screw M4x12 .............. 2 pc

Li-ion

14.4

3.0

Yes

Net weight*: kg (lbs)

*Includes battery BL1430

2.0 (4.4)

13 (1/2)

50 (2)

16 stage + drill mode

1.0 - 5.9 (0.7 - 4.3)

32 (23.6)

70 (51.6)

0 - 300/ 0 - 600/ 0 - 1,700

1.5 - 13 (1/16 - 1/2)

Max output (W) 265

Model BDF441 has been developed as an upgraded sister model of Model 6339D

with the design concept of "More Control and Maneuverability".

Features lightweight and compact design achieved by using 4-pole motor and

Lithium-ion battery as power unit.

Also features the same advantages as BDF440:

Rubberized soft grip contoured to perfectly fit operator hand and angled

to provide best tool balance

All metal gear construction

Job light with afterglow function

Single sleeve chuck

This new product will be available in the following variations.

BDF441SFE

BDF441

BL1430

(Li-ion 3.0Ah) DC18SC (Low voltage areas)

DC14SC (High voltage areas)

DC18SC

Model No. type quantity Charger Offered to

USA, Canada

Mexico, Panama

All countries except

those listed above

BDF441SFE3 3

Battery

P 2 / 7

Repair

[2] LUBRICATION

It is not required to lubricate the gear section because the portion is replaced as a factory-lubricated gear unit.

[3] DISASSEMBLY/ASSEMBLY

[3] -1. Drill Chuck

Fig. 2

[1] NECESSARY REPAIRING TOOLS

CAUTION: Remove the battery cartridge from the machine for safety before repair/maintenance !

DISASSEMBLING

Description Use for

Hex wrench 10 Removing /mounting Drill chuck

Plastic hammer Removing Drill chuck

Hex wrench

Fig. 1

Note: It is required to remove Drill chuck when replacing Gear assembly, but you need not when replacing only Housing.

1) Open the jaws of Drill chuck fully, and remove the chuck screw (Flat head screw M6x22, left-handed and threadlocker

coated) by turning clockwise with impact driver in Forward rotation mode.

2) Insert a hex wrench into Drill chuck. Then set the Speed change lever in 1st speed, and Action mode change lever in

Drill mode as illustrated in Fig. 1. Holding the machine on work bench firmly, turn Drill chuck counter clockwise

by tapping the hex wrench. Now Drill chuck can be removed from Spindle. (Fig. 2)

Fig. 4 Fig. 5

ASSEMBLING

Hex wrench

Vise

End of the threaded

portion of Spindle

Drill chuck

Action mode

change lever

Speed change lever

Speed change lever:

in 1st speed

F/R change lever:

in Forward rotation mode

Action mode change lever: in Drill mode

Battery

1) Make sure that Flat washer 13 is set in place before installing Drill chuck. (Fig. 3)

1) Turn Drill chuck clockwise until it sits on the end of the threaded portion of Spindle.

(Fig. 4)

2) See Fig. 5. Insert a hex wrench into drill chuck, and fix the other end of hex wrench

in vise. Install battery. Then set the Action mode change lever in Drill mode,

the Speed change lever in 1st speed, and F/R change lever in Forward rotation mode.

3) Slowly pull the switch trigger to rotate Spindle until the motor is locked.

Note: Pull the trigger so that Spindle reaches full speed in one second.

Important: Be sure to release the switch trigger just after Spindle is locked.

4) Secure Drill chuck with the chuck screw by turning counterclockwise with impact driver.

Note: If you reuse the removed chuck screw, apply threadlocker to threaded portion.

Fig. 3

Flat washer 13

threaded portion

of Spindle

P 3 / 7

Repair

Fig. 6

Fig. 8 Fig. 9

Fig. 10

[3] -2. Gear Assembly and Motor Section

1) Remove Rear cover and take off Carbon brush from Brush holder complete. (Fig. 6)

Tapping screw

bind PT 3x16

Rear cover

1 2

[Brush holder section (View from A)]

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.

DISASSEMBLING

Gear section

Motor section

Speed change lever assembly Brush holder complete

Yoke unit

2) Unscrew four PT4x20 Tapping screws to disconnect

Gear assembly from Housing. Then by removing

eight PT3x16 Tapping screws, separate Housing R

from Housing L. (Fig. 7)

3) Pull off Heat sink fromYoke unit of the Motor section.

Then remove the assembly of the Gear section and

the Motor section from housing L. (Fig. 8)

3) Remove Brush holder complete from Armature,

then separate the Motor section from the Gear section.

(Fig. 9)

4) Put the Motor section on a work bench so that the

drive end of Armature touches the work bench.

Then separate yoke unit from armature by pulling it

down towards the work bench. (Fig. 10)

Assembly of the Gear section

and the Motor section Heat sink

Housing L

Tapping screw bind PT4x20 (4 pcs)

Tapping screw bind

PT3x16 (8 pcs)

Housing R

Fig. 7

Gear section (= Gear assembly)

P 4 / 7

Repair

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

ASSEMBLING

Your fingers can be pinched

and injured.

[Wrong][Correct] [Wrong][Correct]

Notch

Fig. 9 Fig. 10

Fig. 12

Fig. 13

1) Assemble the motor section.

Note 1.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 as illustrated to left in Fig. 9. If assembled wrong, the Motor section cannot

be assembled to Housing (L).

Note 2. Because Yoke unit is a strong magnet, when assembling Armature toYoke unit, be sure to hold the commutator

portion as illustrated to left in Fig. 10. 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.

2) Insert the pinion gear on Armature shaft into Gear assembly, and engage it with the plant gears in Gear assembly.

Making sure that the pinion gear is engaged in Gear assembly, push Armature into Gear assembly. (Fig. 11)

3) See Fig. 12. Assemble Speed change lever assembly to the protrusion on Gear assembly.

Note: Before installing Gear assembly, make sure that two Leaf springs and two Compression springs are set in place

on Speed change lever as illustrated in Fig. 12.

4) Slide Speed change lever assembly to the position of either

"low" or "high". Then assemble Brush holder complete to

the Motor section. (Fig. 13)

Speed change lever assembly

Speed change lever

assembly

Brush holder

complete

Fig. 11

Motor sectionGear assembly

Pinion gear

Compression spring Leaf spring

Projection

P 5 / 7

Repair

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

ASSEMBLING

Fig. 14

Housing L

rib

The flat portion of Brush holder complete must be at 90 degrees

to the edge surface of Housing L.

flat portion of Brush holder comp.

edge surface of

Housing L

Brush holder complete

projection

5) Assemble the unit of the Gear section and the Motor section as illustrated in Fig. 14.

notch

With the projection on Housing L

fit in the notch on Yoke,

put Yoke unit between the ribs

on Housing L.

F/R change lever

Switch

Housing L

Yoke

put the projection on Switch between

the prongs of F/R change lever.

Projection

Prong

Assembling F/R change lever to Switch

Brush holder comp.

Assembling Brush holder complete to Housing L

90 degrees

P 6 / 7

Repair

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

ASSEMBLING

Fig. 15

6) Assemble Housing R to Housing L. (Fig. 7)

7) Install Carbon brush. (Fig. 15)

8) Mount Rear cover.

[Correct] [Wrong]

Lead wire of Carbon brush

Lead wire correctly routed

Torsion spring

tail of Torsion spring

Route the lead wire of

Carbon brush through this

outside slot in Brush holder.

The lead wire routed wrong may

interfere the tail of Torsion spring.

Brush holders viewed from A

Circuit diagram

Color index of lead wires' sheath

Black

Red

Orange

Blue

Brush holder complete

Terminal

Light

circuit

Connector

LED

Switch

White

Yellow

Heat sink

FET

P 7 / 7

Wiring diagram

rib A

Lead wire holder

LED

FET

Heat sink

Fix the three lead wires of FET

(black, blue, yellow from left to

right) with the lead wire holders

on switch.

[1] Lead Wires of Light Circuit

[2] Lead Wires of Switch, Brush Holder Complete and FET

Lead wires (red, black) to LED

Fix the lead wires (red, black)

to LED with the lead

wire holders.

Terminal side

Switch side

With the lead wire (orange) to Connector

positioned on the Terminal installation side,

fix Light circuit with the holder.

Light circuit

Lead wire

(orange)

Light circuit

Connector of Light circuit

rib B Do not cross the lead wires (red, black)

to LED in the circled portion.

Holder

Connect the Connecting terminals

to Switch

as illustrated below.

Connecting

terminal

approx. 20 degrees

Connecting terminal

on the lead wire from

Brush holder complete

Connector of Switch

Be careful not to route

lead wires on the inlaid

edge of Housing L in

the circled portion.

Between the rib and Light circuit,

route the three lead wires

(blue, red, black) connected to the

Connector of Switch.

Connect the Connector of

Light circuit with that of Switch.

Then fix them in these holders.

Be sure to fix all the lead wires

on each Connector by routing

through the slits in the holder.

Route the lead wires (red, black) to LED

between the rib A and the rib B.

Note:

1. Make sure that the wires are tight

in the circled portion.

2. Be careful not to route over the rib.

rib

Terminal

Switch

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