Makita Power Screwdriver BFS440 User Manual

ECHNICAL INFORMATION  
PRODUCT  
T
P 1/ 7  
Models No.  
Description  
BFS440, BFS450  
L
Cordless Screwdriver  
CONCEPT AND MAIN APPLICATIONS  
H
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.  
W
(The image above is BFS450.)  
These products are available in the following variations.  
Dimensions: mm (")  
Length (L) 258 (10-1/8)*1  
Width (W)  
Height (H)  
80 (3-1/8)  
193 (7-5/8)  
*1. It differs by country.  
BFS440  
Battery  
type  
Plastic  
carrying case  
Model No.  
Charger  
Housing color  
Offered to  
quantity  
2
BL1430  
(Li-ion 3.0Ah)  
No  
BFS440RFE  
DC18RA  
No  
Yes  
No  
Makita-blue All countries except North America  
BFS440Z  
BFS450  
BL1830  
(Li-ion 3.0Ah)  
BFS450RFE  
BFS450Z  
2
DC18RA  
No  
Yes  
No  
Makita-blue All countries except North America  
No  
All models also include the accessories listed in "Standard equipment".  
Specification  
Model  
BFS440  
BFS450  
Specification  
Voltage: V  
14.4  
18  
Battery Capacity: Ah  
1.5 or 3.0*2  
Cell  
Li-ion  
Max output: W  
235  
325  
No load speed: min.-1 = rpm  
4,000  
Driver bit: mm (")  
Capacities: mm (")  
[drywall]  
Shank  
6.35 (1/4) Hex  
Diameter  
4 (5/32)  
Reverse switch  
Yes  
Yes  
LED job light  
Net weight*3: kg (lbs)  
1.7 (3.8)  
1.9 (4.2)  
*2. 1.5Ah: Battery BL1415 or BL1815; 3.0Ah: Battery BL1430 or BL1830  
*3. BFS440: includes battery BL1430; BFS450: includes battery BL1830  
Standard equipment  
Phillips bit 2-25 ...................... 2 Magnetic connect bit 6.35-60 (Magnetic connect bit 6.35-76) ...................... 1  
Belt clip ................................... 1  
Note: The standard equipment for the tool shown above may differ by country.  
Optional accessories  
Phillips bit 1-25  
Phillips bit 2-25  
Phillips bit 3-25  
Magnetic connect bit 6.35-60  
Fast charger DC18RA  
Charger DC24SA (for North America only)  
Charger DC24SC (for all countries except North America)  
Magnetic connect bit 6.35-76  
Batteries BL1430, BL1415 (for BFS440)  
Batteries BL1830, BL1815 (for BFS450)  
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P 2/ 7  
Repair  
CAUTION: Remove the bit and the battery from the machine for safety before  
repair/ maintenance in accordance with the instruction manual!  
[1] NECESSARY REPAIRING TOOLS  
Code No.  
Description  
Use for  
1R269 Bearing extractor Removing Ball bearing 608  
[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.  
Item No.  
18  
Description  
Spindle  
Portion to lubricate  
Amount  
(a) The drum portion that contacts Plane bearing 14  
(b) The Cam portion that contacts 24 Clutch cam C  
(c) The portion that contacts 18 Spindle  
a little  
19  
Shoulder pin 8-10  
(d) The Drum portion that contacts 24 Clutch cam C  
21  
20  
Flat washer 25  
Clutch cam C  
Whole portion  
4g  
4g  
Each depressed portion for Steel ball 4  
(e) Teeth of the small gear that engages Helical gear 48  
(f) Teeth of the large Gear that engages Armature's gear  
24  
Gear complete 18-44  
31  
Fig. 1  
a little  
Plane bearing 14  
Makita grease FA.No.2  
(a)  
18  
(c)  
19  
20  
(d)  
21  
(b)  
24  
Steel ball 4.0  
Helical gear 48  
Ball bearing 608  
(f)  
31  
(e)  
Armature  
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P 3/ 7  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3] -3. Locater Section  
DISASSEMBLING  
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. 3  
Leaf spring Ring spring 33  
Locater base complete  
Lock ring  
Dust seal ring  
2
M4x25  
Pan head screw  
Locater complete  
1
Locater base complete Brake pin  
Lock ring  
Front cover  
ASSEMBLING  
4x18 Tapping screws (2 pcs.)  
M4x25 Pan head screw Locater complete  
Do the disassembling step in reverse.  
[3] DISASSEMBLY/ASSEMBLY  
[3] -4. Helical Gear 48, Clutch Section  
DISASSEMBLING  
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.  
Fig. 4  
Fig. 5  
4x18 Tapping screws (9 pcs.)  
Ball bearing 608  
Housing R  
Assembly of Helical gear 48 and Clutch cam, etc.  
Fig. 6  
Leaf spring  
Fig. 7  
Ball bearing Steel ball 4 Flat washer 26 Flat washer 25 Spindle Sleeve 20 Plane bearing 14  
608 (3 pcs.) (2 pcs.)  
Spindle  
Long nose  
pliers  
Steel ball 4  
Clutch cam C Compression spring 25 Shoulder pin 8-10 O ring 18  
Helical  
gear 48  
Leaf spring  
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P 4/ 7  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3] -4. Helical Gear 48, Clutch Section (cont.)  
ASSEMBLING  
Taking the steps described in Fig. 8 to 11.  
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  
Fig. 9  
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.  
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.  
Steel ball 4  
(3 pcs)  
Clutch cam C  
Helical gear 48  
Fig. 10  
5) Assemble the parts illustrated below into Clutch section.  
Note:  
Plane bearing 14  
Steel ball 3.5  
Apply Makita grease FA.No.2 to the specific portions of  
Spindle and Shoulder pin 8-10 illustrated in Fig. 1.  
Spindle  
Shoulder pin 8-10  
O Ring 18  
Sleeve 20  
Flat washer 25 (2 pcs)  
Assembly of Helical gear 48  
Ball bearing 608  
Fig. 11  
Rubber sleeve 10  
Gear complete 18-44  
Plane bearing 5  
(front)  
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).  
Flat washer 5  
Plane bearing 5  
(rear)  
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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.  
Fig. 12  
Fig. 13  
Brush holder  
Carbon  
brush  
complete  
Torsion  
spring  
2
1
Armature  
Carbon  
brush  
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.  
Yoke unit  
ASSEMBLING  
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)  
Fig. 14  
Fig. 15  
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.  
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.  
If assembled wrong, the Motor section  
cannot be assembled to Housing L.  
[Correct]  
[Wrong]  
[Correct]  
[Wrong]  
Gear  
Your fingers will be pinched  
and injured.  
notch  
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P 6/ 7  
Repair  
[3] DISASSEMBLY/ASSEMBLY  
[3] -5. Motor Section (cont.)  
ASSEMBLING  
3) Assemble the Motor section to Housing L as illustrated in Fig. 16.  
Fig. 16  
Assembling Brush Holder to Housing L  
1) Fit Brush holder complete in the groove  
of Housing L.  
Housing L  
groove  
rib  
2) The flat portion of Brush holder complete  
must be at 90 degrees to the edge surface  
of Housing L.  
projection  
flat portion of Brush holder complete  
edge surface of  
90 degrees  
Housing L  
Housing L  
notch in Yoke unit Brush holder complete  
Assembling Yoke Unit to Housing L  
With the projection on Housing L fitting in the notch on Yoke unit,  
put Yoke unit inside the four ribs on Housing L.  
Brush holder complete  
viewed from Front cover side  
[3] -6. Switch  
Fig. 17  
ASSEMBLING  
Put the projection on Switch between the prongs of F/R change lever,  
then assemble the Switch to Housing L. (Fig. 17)  
F/R change lever  
prong  
projection  
Switch  
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P 7/ 7  
Circuit diagram  
Fig. D-1  
Color index of lead wires' sheath  
Black  
White  
Red  
Switch  
Blue  
Brush Holder  
Complete  
Yoke unit  
LED  
Circuit  
Terminal  
Wiring diagram  
Fig. D-2  
Switch lead wires (red, black)  
must be passed between rib A and rib B.  
Switch  
rib B  
rib A  
Brush holder  
complete  
Switch lead wires  
(red, black) must be  
fixed with these  
Lead wire holders.  
LED  
Terminal  
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.  
Wire connecting portion  
Connecting Flag Connector  
to Terminal  
Pole mark  
Flag connector  
The flag connector must be so connected that  
the wire connecting portion is positioned on  
the side of pole marks of Terminal.  
Terminal  
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