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Makita Makstar BFT121F Technical Information
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Makita Makstar BFT121F Technical Information

Makita Makstar BFT121F Technical Information

12v
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T
ECHNICAL INFORMATION
Models No.
Description
C
ONCEPTION AND MAIN APPLICATIONS
The above model with built-in job light is the 12V version
of BFT120F for getting high turning angle in the fastening
with soft joint.
S
pecification
Type of cell
Voltage : V
Battery
Capacity : Ah
No load speed : min
Driving shank : mm ( " )
Fastening torque : N.m (in.lbs)
LED Job light
Electric brake
Torque adjustment
Soft starter
Reverse switch
Net Weight : Kg (lbs)
S
tandard equipment
* Adjust grip for pre-setting torque ............................... 1 pc. (only for Italy and USA.)
* Protector ..................................................................... 1 pc. (only for Germany)
< Note > The standard equipment for the tool shown may differ from country to country.
O
ptional accessories
* Battery BH1220 12V, 2.0Ah
* Battery BH1233 12V, 3.3Ah
* Charger DC24SA
* Charger DC14SA
* Automatic refreshing adapter ADP03
BFT121F
Cordless Screwdriver 12V
= rpm
-1
Yes (possible to adjust with adjust grip)
Length ( L )
Width ( W )
Height ( H )
NiMH
12.0
2.0 / 3.3
340
6.35 (1/4) Hex
5 - 12 (44.3 - 106)
Yes
Yes
Yes
Yes
1.5 (3.3) with 2.0 Ah battery
1.7 (3.9) with 3.3 Ah battery
* Protectors (red, blue, yellow)
* Adjust grip for pre-setting torque
* Grip base set
* Grip 37
PRODUCT
L
W
Dimensions : mm ( " )
w/ 3.3 Ah battery w/ 2.0 Ah battery
174 (6-7/8)
71 (2-13/16)
288 (11-11/32)
265 (10-7/16)
P 1 / 12
H

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Summary of Contents for Makita Makstar BFT121F

  • Page 1 ECHNICAL INFORMATION PRODUCT P 1 / 12 BFT121F Models No. Description Cordless Screwdriver 12V ONCEPTION AND MAIN APPLICATIONS The above model with built-in job light is the 12V version of BFT120F for getting high turning angle in the fastening with soft joint. Dimensions : mm ( "...
  • Page 2 P 2 / 12 epair < 1 > Lubrication Apply MAKITA grease N. No.2 to the following portions marked with black triangle to protect parts and product from unusual abrasion. Flat washer 18 (40) (47) (24) (38) Flat (39) (41) (42)
  • Page 3 P 3 / 12 epair < 3 > Assembling bit holder section Mount the parts to spindle in the following order. 1. 2 pcs. of steel balls 3 3. Compression spring 13 2. Sleeve 4. Flat washer 11 And then, secure the above parts with ring spring. See Fig. 1A and Fig. 1 <...
  • Page 4 P 4 / 12 epair < 5 > Mounting motor section and gear assembly to housing (1) Pass armature through yoke unit. And mount motor bracket to armature. See Fig. 6. Fig. 6. <Note> Motor bracket Be careful, not to be pinched your finger between yoke unit and armature.
  • Page 5 P 5 / 12 epair (4) Mount the following parts to housing R before mount housing L. See Fig. 9. * Pin 2.5 * Terminal * LED circuit * Plate * Buzzer circuit * Lens * F.R. Change lever Pin 2.5 Fig.
  • Page 6 P 6 / 12 epair < 6 > Disassembling gear assembly ( 1 ) After removing bit holder section, remove spring holder section (front cover, spring holder A, thin washer 30, compression spring 30, thin washer 24 and torque plate). 1.
  • Page 7 ( 2 ) Mount the spindle to gear case complete. See Fig. 17. ( 3 ) Mount flat washer 12 and 16 pcs. of steel balls 3 (MAKITA grease N No.2 is applied to them.) and the another flat washer 12 to spindle.
  • Page 8 Spur gear 10 complete ( 8 ) Put compression spring 2 into switch lever, and apply MAKITA grease N.No.2 to both upper and lower side of switch lever. Mount this switch lever to gear case complete. See Fig. 23. ( 9 ) And then, pushing holder plate toward armature side, secure it with 1 pc. of tapping screw bind PT3x10.
  • Page 9 P 9 / 12 epair (11 ) Mount thin washer 24, compression spring 30, thin washer 30 and spring holder to gear case complete. Turn spring holder and adjust as illustrated in Fig. 26. And then, mount front cover. See Fig. 26. Fig.
  • Page 10 P 10 / 12 ircuit diagram Color index of lead wires Black White Yellow Switch Orange Blue Purple Gray Micro switch Reverse switch Controller Indicator lamp is Terminal built in the controller. DC Motor Connector Switch unit Connector Circuit < Note > For BFT120, the LED circuit is not installed.
  • Page 11 P 11 / 12 iring diagram BFT120, 9.6V without LED job light BFT120F, 9.6V with LED job light Pass the endbell's lead wires (black and red) both sides of LED cover portion of controller. Endbell's lead wire (black) Endbell's Put the slack lead wires and the following lead wire LED cover portion connectors in this space.

  • Page 12: Wiring Diagram

    P 12 / 12 iring diagram BFT121F, 12V (with LED job light) Pass the endbell's lead wires (black and red) both sides of LED cover portion of controller. Endbell's lead wire (black) Put the slack lead wires and the following Endbell's connectors in this space.