Makita BDF446 Manuel

P 1/ 10

Model No.

Description

CONCEPT AND MAIN APPLICATIONS

Specification

Dimensions: mm (")

Width (W)

Height (H)

Length (L) 192 (7-9/16)

79 (3-1/8)

251 (9-7/8)

BDF446

Cordless Driver Drill

Battery

Capacity of drill chuck: mm (")

Capacity: mm (")

Lock torque: N.m (in.lbs)

Electric brake

Variable speed control

Mechanical speed control

Reversing switch

Max. fastening

torque: N.m (in.lbs)

Torque setting

Steel

Wood

Soft joint

Hard joint

No load speed:

min-1=rpm

Cell

Voltage: V

Capacity: Ah

High

Standard equipment

Optional accessories

Note: The standard equipment for the tool

shown above may vary by country.

Fast charger DC18RC

Charger DC18SD

Charger DC24SC

Automotive Charger DC18SE

Battery BL1430

Battery BL1430A

Drill bits for wood

Drill bits for steel

Belt clip

Bit holder

+ – bit 2-45 ........ 1 pc

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

Weight according to

EPTA-Procedure 01/2003*2: kg (lbs)

Low

Max output: W

Li-ion

Charging time (approx.):

min.

with DC18RC

14.4

3.0

Yes

Yes (2 speed)

Yes

1.7 (3.7)

13 (1/2)

38 (1-1/2)

16 stages + drill mode

Clutch torque setting: N.m (in.lbs) 1.0 - 5.0 (9 - 44)

45 (400)

30 (270)

44 (390)

0 - 1,500

0 - 400

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

250

Model BDF446 is the upgraded version of model BDF442, featuring:

• More compact and lightweight design than BDF442

• More comfortable operation will be provided by redesigned ergonomic grip

• Compatible with the 14.4V Li-ion batteries equipped with the Battery protection circuit

designed to protect the battery from damages due to overdischarge, high temperature

or overload current

Note: This product is not compatible with 14.4V-1.3Ah battery BL1415.

This product is available in the following variations.

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

Housing

color

BDF446RFE

(---) DC18RC

Model No. Type Quantity Charger Plastic

carrying case

Battery

cover

Yes

Battery

BDF446RFE3

BL1430 DC18RC Yes

BDF446RF

BL1430

3 2

No NoNoNo No

BDF446Z

(---)

Makita blue

BL1430 DC18RC

Makita blue

whiteBDF446RFW

PRODUCT

LED job light

*2 with Battery BL1430

TECHNICAL INFORMATION

OFFICIAL USE

for ASC & Sales Shop

P 2/ 10

Repair

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

[1] NECESSARY REPAIRING TOOLS

[2] LUBRICATIONS

[3] DISASSEMBLY/ASSEMBLY

[3]-1. Drill Chuck

Code No. Description Use for

Hex Wrench 10 removing / mounting Drill chuck

1R359

DISASSEMBLING

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

Drill chuck removing tool (Use this tool if Drill chuck cannot be removed by the method

described in “ [3]-1. Drill chuck disassembling”.)

(1) Set Machine and Repairing tools. (Figs. 1, 2, 3)

CORRECT WRONG

Fig. 3

Fig. 1 Fig. 2

Note: Use Impact driver to unscrew

M6 x 22 Flat head screw if it

could not be removed manually.

Open Keyless drill chuck fully and

remove M6 x 22 Flat head screw

by turning it clockwise.

M6 x 22 Flat head screw

F/R Change lever

Set Speed change lever

to Low speed mode

indicated by “1”.

Set Change ring

to Drill mode.

Speed change lever

Change ring

Set F/R Change lever to

Reverse (counter clockwise)

rotation.

Attach battery.

Setting of Hex wrench 10

Vise

Grip flat surfaces

of Hex wrench 10.

Hex wrench 10

Hex wrench 10,

viewed from side [A]

Vise

Grip the long end.

[A] [A]

Do not grip edges of

Hex wrench 10.

Do not grip

the short end.

Hex wrench 10,

viewed from side [A]

P 3/ 10

Repair

[3] DISASSEMBLY/ASSEMBLY

[3]-1. Drill Chuck (cont.)

DISASSEMBLING

*Note: The rotational direction is viewed from operator.

1. Grip Hex wrench 10 with Drill chuck and hold Machine.

Important:

Be sure to hold the grip of Machine tightly with sufficient

counterclockwise* force against clockwise* recoil force

of Machine.

2. Pull Switch trigger slowly.

3. Spindle rotates counterclockwise* and consequently

Drill chuck is removed from spindle.

Hex wrench 10

Counterclockwise* force

to be applied by operator

Clockwise* recoil force

of Machine

Fig. 4

(2) Remove Drill chuck. (Fig. 4)

ASSEMBLING

Fig. 5 Fig. 6

end of the threaded

portion of Spindle

Drill chuck

Turn Drill chuck clockwise until it sits on

the end of the threaded portion of Spindle.

F/R Change lever

Set Speed change lever

to Low speed mode

indicated by "1".

Set Change ring

to Drill mode.

Speed change lever

Change ring

Set F/R Change lever to

Forward (clockwise) rotation.

Attach battery.

(1) Set the machine. (Fig. 5, 6)

(2) Set Hex wrench 10 to vise and described in Fig. 3.

P 4/ 10

Repair

[3] DISASSEMBLY/ASSEMBLY

[3]-1. Drill Chuck (cont.)

ASSEMBLING

(3) Tighten Drill chuck. (Fig. 7)

Hex wrench 10

Fig. 7

M6x22 Flat head screw

4. Open Keyless drill chuck fully,

then drive M6x22 Flat head screw

by turning counterclockwise*

with Impact driver.

Counterclockwise

recoil force

of Machine

*Note: The rotational direction is viewed from operator

1. Grip Hex wrench 10 with Drill chuck and hold Machine.

Important:

Be sure to hold the grip of Machine tightly with sufficient

clockwise* force against counterclockwise* recoil force

of Machine.

2. Pull Switch trigger slowly to turn Spindle clockwise*.

3. Drill chuck is tightened and consequently Spindle is locked.

Clockwise* force to

be applied by operator Note:

Apply adhesive (ThreeBond 1321B/

1342 or Locktite 242 to threaded

portion) when re-using removed

M6x22 Flat head screw.

DISASSEMBLING

Fig. 8

[3]-2. Gear assembly and Motor section

Rear cover

1. Unscrew two 3x16 Tapping screws,

then remove Rear cover.

2. Pull Carbon brushes in the direction of the arrow

after shifting the end of each Torsion spring from

the top of Carbon brushes.

Carbon brushes

(1) First, remove Drill chuck.(Figs. 1,2,3,4)

(2) Then remove Rear cover and disconnect Carbon brushes from Armature’s Commutator

before dismantling Housing set. (Fig. 8)

Shift the end of each

Torsion spring to the

concave portion of

Brush holder.

P 5/ 10

Repair

[3] DISASSEMBLY/ASSEMBLY

[3]-2. Gear assembly and Motor section (cont.)

DISASSEMBLING

(3) Disassemble Gear assembly and Motor section. (Fig. 9)

Fig. 9

3. Unscrew nine 3x16 Tapping screws,

then remove Housing (R).

4. Remove the assembly of

Motor section and Gear section.

Housing (R)

5. Remove Speed change lever,

then separate Gear assembly

from Motor section.

6. Remove Armature along with Yoke unit

from Brush holder complete.

Speed change lever

Gear assembly

Brush holder

complete

Armature

Yoke unit

Armature

7. Pull Armature from Yoke unit.

Yoke unit

Motor section

P 6/ 10

Repair

[3] DISASSEMBLY/ASSEMBLY

[3]-2. Gear assembly and Motor section (cont.)

(4) Insert Armature into Yoke unit carefully and connect Motor section to Gear assembly. (Fig. 11)

(3) Put Leaf spring in place on the inside of Housing (L). (Fig. 10)

Fig. 11

Fig. 10

ASSEMBLING

3. Mount Speed change lever to Gear assembly. (Refer to Fig. 14)

notch

Notch must be located on Armature

drive-end as above.

[Wrong][Correct]

Note: Be careful when inserting

Armature as fingers can

be pinched and injured.

[Wrong][Correct]

Be sure to hold Commutator portion as your fingers

can be pinched by Armature fun due to strong magnetic

force toward Yoke unit.

2. Connect Motor section to

Gear assembly by engaging

Armature gear with Planetary

gears in Gear assembly.

Be sure to put Leaf spring

in place as drawn on the right.

Leaf springHousing (L)

1. Insert Commutator end

into Brush holder complete.

P 7/ 10

Repair

[3] DISASSEMBLY/ASSEMBLY

[3]-2. Gear assembly and Motor section (cont.)

ASSEMBLING

(5) Engage the notch of Yoke unit with the projection inside of Housing (L) when mounting the assembly of

Gear section and Motor section to Housing (L). (Fig. 12)

(6) Adjust the assembly of Motor section and the Gear section to the correct position in Housing (L)

so as to assemble Housing (R) to Housing (L) smoothly and exactly. (Fig. 13)

Fig. 12

Fig. 13

projection for fitting

to the notch

Engage the notch of Yoke unit with the projection inside of Housing (L).

Housing (L) notch

Yoke unit

The flat portion of Brush holder must be at

exactly 90 degrees to the edge of Housing (L).

edge of

Housing (L)

Brush holder

complete

Housing (L)

flat portion of

Brush holder

complete

90 degrees Yoke unit must be mounted

within these ribs.

This rib must be fit in

the groove of Change ring.

P 8/ 10

Repair

[3] DISASSEMBLY/ASSEMBLY

[3]-3. Speed change lever

Assemble Speed change lever to Gear assembly. (Fig. 14)

Mount F/R Change lever on Switch before assembling Housing (R) to Housing (L). (Fig. 15)

Fig. 14

Fig. 15

ASSEMBLING

1. Be sure to put two

Compression springs

on the back of

Speed change lever.

hook

2. Mount Speed change lever to

Gear assembly.

Note: Be sure to fit the hook of

Gear assembly in Speed

change lever.

Gear assembly

Low speed side

3. Set Speed change lever to either

Low speed side or High speed side.

High

speed side

Compression springs

[3]-4. F/R Change lever

F/R Change lever

projection

Engage the prong portion

with the projection of Switch.

prong portion

Circuit diagram

P / 1

Fig. D-1

White

Color index of lead wires' sheath

Black

Red

Yellow

Brush holder

complete

Switch

Terminal

Connector

FET (Field effect transistor)

LED

job light

Line filter

Line filter is not used

for some countries.

Wiring diagram

P 1/ 1

Fig. D-3

Fig. D-2

Brush holder

complete

Lead wire wiring of Brush holder complete

Switch

Terminal

boss

Connector

Line filter

Wiring in Grip portion

Fix Lead wires with these

Lead wire holders.

Place Line filter here

if it is used.

Line filter

2. Assemble Receptacles to

Lead wires.

1. Pass Lead wires of Brush holder complete

through Line filter if it is used.

Receptacle

Line filter

Line filter is not used

for some countries.

LED job light

LED Lead wires must be

tight in this area indicated

by the dotted line.

Pass Lead wires to Switch

in this area.

Do not pass between

the boss and Housing wall.

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