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Makita MAKSTAR BTW250 Series Technical Information
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Makita MAKSTAR BTW250 Series Technical Information

Makita MAKSTAR BTW250 Series Technical Information

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T
ECHNICAL INFORMATION
Models No.
Description
C
ONCEPT AND MAIN APPLICATIONS
Models BTW250 and BTW251 are compact and lightweight
cordless impact wrenches, featuring maximum fastening torque
of 230N.m (170ft.lbs).
BTW250 is powered by Model BL1430 14.4V Li-ion battery,
and BTW251 by Model BL1830 18V Li-ion battery.
These products are available in the following variations:
BTW250
Model No.
Charger
BTW250Z
BTW250RFE
DC18RA
BTW251
Model No.
Charger
BTW251Z
BTW251
DC18RA
BTW251RFE
The items listed below in "Standard Equipment" also come with the above items.
S
pecification
Specification
Voltage: V
Battery
Capacity: Ah
Cell
Max output (W)
Driving shank
Impacts per min.: min.-1=ipm
No load speed: min.-
Max. fastening torque*: N.m (in.lbs)
Net weight**: kg (lbs)
*catalog value (torque at 6 seconds after seating) **with battery
S
tandard equipment
Belt clip ................................... 1
Plastic carrying case ................ 1
Note: The standard equipment for the tool shown above may differ by country.
O
ptional accessories
Sockets
Extension bar
Universal joint
Bit adapter assembly
BTW250, BTW251
Cordless Impact Wrench
Battery
type
quantity
No
No
No
BL1430
2
Battery
type
quantity
No
No
No
BL1830
2
Model
=rpm
1
Battery BL1430 (for BTW250 only)
Battery BL1830 (for BTW251 only)
Fast charger DC18RA
Charger DC24SA
Plastic
carrying case
No
Yes
Plastic
Offered to
carrying case
No
All countries
USA, Canada, Mexico, Panama
Yes
All countries other than
the four listed above
BTW250
14.4
3.0
Li-ion
235
12.7mm (1/2") Square
0 - 3,200
0 - 2,200
230 (2,040)
1.6 (3.5)
Charger DC24SC (for BTW250 only)
BTW250
Dimensions: mm (")
Model
BTW250, BTW251
Length (L)
Width (W)
Height (H)
BTW251
18
280
0 - 2,100
1.7 (3.7)
PRODUCT
P 1 / 8
BTW251
165 (6-1/2)
79 (3-1/8)
234 (9-1/4)

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Summary of Contents for Makita MAKSTAR BTW250 Series

  • Page 1 ECHNICAL INFORMATION PRODUCT P 1 / 8 BTW250, BTW251 Models No. Cordless Impact Wrench Description ONCEPT AND MAIN APPLICATIONS Models BTW250 and BTW251 are compact and lightweight cordless impact wrenches, featuring maximum fastening torque of 230N.m (170ft.lbs). BTW250 is powered by Model BL1430 14.4V Li-ion battery, and BTW251 by Model BL1830 18V Li-ion battery.

  • Page 2: Necessary Repairing Tools

    Socket 32-50 (2 pcs) [2] LUBRICATION Apply the following grease to protect parts and product from unusual abrasion: Makita grease N. No.2 to the portions designated with the black triangle Makita grease FA. No.2 to the portions designated with the gray triangle Description...
  • Page 3 P 3 / 8 epair [3] DISASSEMBLY/ASSEMBLY [3] -1. Disassembling/Assembling Hammering Mechanism DISASSEMBLING Fig. 2 1) Remove Belt clip by unscrewing Screw M4x12. Bumper Hammer case Rear cover Remove Bumper and Hammer case cover by hand, Remove Rear cover by unscrewing two PT3x16 Tapping screws.
  • Page 4 P 4 / 8 epair [3] -1. Disassembling/Assembling Hammering Mechanism (cont.) 6) Install 1R346 on 1R045. (Fig. 5) Fig. 5 7) Set 1R045 on Hammering mechanism (= assembled unit of Hammer, Spindle, Spur gears, Steel balls, etc.) as illustrated in Fig. 6. 1R045 Then turn the handle of 1R045 clockwise to lower Hammer to the full.
  • Page 5 P 5 / 8 epair [3] -1. Disassembling/Assembling Hammering Mechanism (cont.) ASSEMBLING Do the reverse of assembling steps. Note: 1) Assemble by piling up component parts on Bearing box complete as illustrated in Fig. 10. 2) Make sure that twenty-four 3.5 Steel balls are in place inside Hammer. 3) Make sure that O ring 40 is assembled to Bearing box complete before assembling Internal gear 51.
  • Page 6 P 6 / 8 epair [3] -2. Disassembling/Assembling Motor Section DISASSEMBLING Fig. 13 1) Separate the assembly of Armature and Yoke unit from the machine. (Refer to 1) to 4) of [3] -1.) 2) Put the assembly of Yoke unit and Armature on a work bench with the drive end of the Armature down.

  • Page 7: Circuit Diagram

    P 7/ 8 ircuit diagram Fig. 18 Color index of lead wires' sheath Brush holder complete Black Light circuit Orange Blue Switch Terminal Connector iring diagram [1] Lead Wire of Carbon Brush As illustrated to left in Fig. 19, put each Carbon brush into Brush holder so that its lead wire is placed outside.
  • Page 8 P 8/ 8 iring diagram [2] Wiring in Housing Fig. 20 [2] -1. Lead Wires of LED As illustrated below, fix the two lead wires (red and black) of LED with lead wire holders, and route them between the pin and the boss. lead wire holder lead wire holder Fit the corner of LED in this...

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Makstar btw251 seriesMakstar btw250zMakstar btw250rfeMakstar btw251zMakstar btw251rfe