Makita Makstar BDF452 Manual

PRODUCT
P 1 / 8
Model No.
Description
CONCEPT AND MAIN APPLICATIONS
Specification
Standard equipment
Optional accessories
Dimensions: mm (")
Width (W)
Height (H)
Length (L) 203 (8)*1
197 (7-3/4)*2
78 (3-1/16)
234 (9-1/4)*3
251 (9-7/8)*4
BDF452
Cordless Driver Drill 13mm (1/2") L
H
Note: The standard equipment for the tool shown above may differ by country.
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
Charger DC18RA
Charger DC18SC
Charger DC24SA
Charger DC24SC
Battery BL1815
Battery BL1830
Assorted drill bits for wood
Assorted drill bits for steel
Belt clip
Bit holder
Phillips bit 2-45 ................ 1 pc Plastic carrying case ....... 1 pc
Net weight: kg (lbs) *5: with Battery BL1815
*6: with Battery BL1830
Low
Max output: W
Li-ion
18
1.5/ 3.0
Yes
Yes
Yes (2 speed)
Yes
1.6 (3.5)*5/ 1.8 (3.9)*6
13 (1/2)
38 (1-1/2)
16 stage + drill mode
51 (450)
0 - 1,500
0 - 400
1.5 (1/16) - 13 (1/2)
300
Model BDF452 has been developed as a cost-competitive 18V cordless driver, featuring;
Compact and lightweight design achieved without power reduction by using 4-pole motor
and Lithium-ion battery as power unit
Rubberized soft grip contoured to perfectly fit operator's hand and angled
to provide best tool balance
All metal gear construction
Job light with afterglow function
Single sleeve chuck
TECHNICAL INFORMATION
W
This new product will be available in the following variations.
All models also include the accessories listed below in "Standard equipment".
BDF452H
BDF452RFE BL1830
(Li-ion 3.0Ah)
BL1815
(Li-ion 1.5Ah) DC18RA
Model No. type quantity Charger
Makita blue
Makita blue
white
Housing
color Offered to
North American
countries
All countries except
those listed above
2
2
BDF452HW
Battery
*1: for countries of
North America and
Latin America
*2: for other countries
*3: with Battery BL1815
*4: with Battery BL1830
(with Battery BL1815)
32 (280)
50 (440)

P 2 / 8
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 Low speed as illustrated in Fig. 1.
Holding the machine on work bench firmly, turn Drill chuck counterclockwise by tapping the hex wrench. (Fig. 2)
Now Drill chuck can be removed from Spindle.
Fig. 3 Fig. 4
ASSEMBLING
1) Turn Drill chuck clockwise until it sits on the end of the threaded portion of Spindle. (Fig. 3)
2) See Fig. 4. Insert a hex wrench into drill chuck, and fix the other end of hex wrench in vise. Install battery.
Then set the Speed change lever in Low speed, and F/R change lever in Forward (clockwise) 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 Flat head screw M6x22, apply threadlocker to threaded portion.
Battery
Hex wrench
Vise
End of the threaded
portion of Spindle
Drill chuck Speed change lever:
in Low speed
F/R change lever:
in Forward rotation mode
Speed change lever

P 3 / 8
Repair
Fig. 5
Fig. 6 Fig. 7
Fig. 8
[3] -2. Gear Assembly and Motor Section
1) Remove Rear cover and take off Carbon brush from Brush holder complete. (Fig. 5)
Tapping screw
bind PT 3x16
Rear cover
1 2
[Brush holder section (View from A)]
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.
A
DISASSEMBLING
2) After separating Housing R from Housing L, remove Heat sink with FET and the assembly of the Gear section and Motor
section from Housing L. (Fig. 6)
3) Remove Brush holder complete from Armature, then separate the Motor section from the Gear section. (Fig. 7)
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. 8)
Heat sink
with FET Housing R
Gear section
(= Gear assembly)
Motor section
Speed change
lever assembly Brush holder
complete
Yoke unit
Housing L

P 4 / 8
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 to Yoke 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 planet 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 Compression
springs are set in place in the groove on the back of Speed change lever.
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)
Compression spring
Speed change lever assembly
Speed change lever
assembly Brush holder
complete
Fig. 11
Motor sectionGear assembly
Pinion gear
Projection

P 5 / 8
Repair
[3] -2. Gear Assembly and Motor Section (cont.)
ASSEMBLING
Fig. 16
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
Housing L
Change ring
Yoke unit
Brush holder complete
projection
5) Assemble Leaf spring to Housing L. (Fig. 14)
6) Assemble the unit of the Gear section and the Motor section as illustrated in Fig. 15
and then, assemble Heat sink with FET between switch and yoke unit. See Fig. 16.
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
Fig. 14 Fig. 15
Housing L Leaf spring
Yoke unit
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.
rib
Fit the rib of Housing L in the groove
on Change ring.
groove
Assembling Change ring to Housing L
Change ring
Assembling Brush holder complete to Housing L
90 degrees
Housing L
Heat sink
with FET

P 6 / 8
Repair
[3] -2. Gear Assembly and Motor Section (cont.)
ASSEMBLING
Fig. 17
7) Assemble Housing R to Housing L. (Fig. 6)
8) Install Carbon brush. (Fig. 17)
9) Mount Rear cover.
[Correct] [Wrong]
Lead wire of Carbon brush
Lead wire correctly routed
Torsion spring
tail of 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
A

Circuit diagram
P 7 / 8
Heat sink
Brush holder complete
Switch
Terminal
FET
Connector
Housing L
Fig. 18
Color index of lead wires' sheath
Black
Red
White

Wiring diagram
P 8 / 8
Brush holder complete
Fig. 19
LED Job light
Fix Lead wires of LED Job light
with Lead wire holders A, B and C.
Lead wire holder B
Lead wire holder C
Lead wire holder A
Yoke unit
Switch
Connector
Terminal
boss
Lead wires of Switch
Flag connector
Terminal
Lead wires of LED Job light
must be tight between
Lead wire holder A and
LED Job light.
Lead wires of LED Job light
Pole mark
The Flag connector has to be so connected
that the wire connecting portions are positioned
on the side of pole marks of Terminal.
Wire connecting portion
Do not route Lead wires of Switch
between the boss and the wall of
Housing L.