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TW0350-TE


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T     ECHNICAL INFORMATION
   Models No.                   TW0350                                                                      W
                                                                                                                        PRODUCT
                                                                                                                          P 1 / 10

    Description                 Impact Wrench                                                                 L
CONCEPTION AND MAIN APPLICATIONS
   In order to occupy the advantageous position in the market,
   we have developed the above impact wrench with the following
   features.
    * Incredibly high torque of 350 N.m (260 ft.lbs)
    * Equipped with palm-fitting soft grip for comfortable work.

                                                                                                                             H



                                                                                Dimensions : mm ( " )
                                                                           Length ( L ) 283 (11-1/8)
                                                                           Width ( W )   87 (3-7/16)
 Specification                                                             Height ( H ) 233 (9-1/8)

                                                                                 Continuous Rating (W)
      Voltage (V)              Current (A)              Cycle (Hz)                                            Max. Output(W)
                                                                                Input           Output
           110                      3.8                   50 / 60                400              230                  350
           120                      3.5                   50 / 60                400              230                  350
           220                      1.9                   50 / 60                400              230                  350
           230                      1.8                   50 / 60                400              230                  350
           240                      1.8                   50 / 60                400              230                  350

    No load speed (min-1=rpm)                                                 2,000
    Impact per minute (min-1=bpm)                                             2,000
    Square drive : mm ( " )                                                12.7 (1/2)
                Standard bolt                                              M12 - M22
    Capacities
               High Tensile bolt                                           M12 - M16
    Max. fastening torque : N.m (ft.lbs)                                      350 (260)
    Reverse switch                                                       Yes (Rocker type)
    Power supply cord : m ( ft )                          2.0 (6.6) for Australia 2.5 (8.2) for other than Australia
    Net weight: kg (lbs)                                                     2.9 (6.4)




 Standard equipment
   * Socket 24-45 .................................... 1 pc.
   * Plastic carrying case ....................... 1 pc.
   < Note > The standard equipment for the tool shown may differ from country to country.

 Optional        accessories
   * Socket 19-38              * Socket 21-150                 * Socket 24-52      * Socket 30-78        * Extension bar
   * Socket 19-52              * Socket 22-38                  * Socket 26-50      * Socket 32-50        * Universal joint
   * Socket 19-78              * Socket 22-52                  * Socket 26-78      * Socket 32-78        * Elliptic socket
   * Socket 21-38              * Socket 23-38                  * Socket 27-50                            * Time switch
   * Socket 21-52              * Socket 23-52                  * Socket 27-78
   * Socket 21-78              * Socket 24-45                  * Socket 30-50
Features    and benefits                                                                                             P 2 / 10
                                                            TW0350
                                              Aluminum hammer case
                                              with high durability
                                                                                                Cylindric housing with high
                                                                                                rigidity and durability

                                                                                                     Externally accessible
  Incredibly high
                                                                                                     carbon brush for easy
  fastening                                                                                          replacement
  torque : 350N.m (260 ft.lbs)

       Bumper protects workpiece                                                          Palm-fitting soft grip
       from scratches.


                               Rocker switch which is standard
                               one for impact wrench, provides
                               easy rotation reverse




Comparison         of products

                                                  MAKITA                           Competitor X Competitor Y Competitor Z
                   Model No.
  Specifications                    TW0350        6905B             6905H                X              Y               Z

 Max. fastening torque                350           294              294                325            250            294
 : N.m (ft.lbs) in catalogue         (260)         (217)            (217)              (240)                         (217)
 Square drive : mm                   12.7          12.7              12.7              12.7           12.7           12.7
                  (")                (1/2)         (1/2)             (1/2)             (1/2)          (1/2)          (1/2)

  Power input : W                    400            380              470                               500            380

  Rated amperage
                                     3.5             4.0              6.0              7.5                            5.0
  for North America : A
  No load
                                    2,000           1,700            2,200            2,100         500 - 1,300      1,700
    speed :min-1=rpm
  Impact per
                                    2,000           2,200            2,600            2,700           1,800          2,000
     minute :min-1=bpm
                                                                    Plastic
  Material of hammer case         Aluminum       Aluminum                          Aluminum         Aluminum        Aluminum
                                                                 Clam shell type
  Externally accessible brush         Yes           Yes               No               Yes              No            Yes
  Soft grip                           Yes           No                No               No               No            No
  Switch Type                        Rocker         Rocker           Trigger       ** Rocker       Trigger w/Dial    Rocker
  Overall length: mm                  282             270            275                276             320           270
                  (")              (11-1/8)        (10-5/8)        (10-7/8)          (10-7/8)         (12-5/8)      (10-5/8)
  Net                                 2.9             2.7            2.3                3.2             3.3            2.9
  weight: kg (lbs)                   (6.4)           (6.0)          (5.1)              (7.0)           (7.3)          (6.4)

                                                                                   ** Rocker : for North America,
                                                                                      Trigger type : for Europe
Comparison                         of products                                                            P 3 / 10

 Fastening high tensile bolt M20
    < Note on Max. fastening torque >
    MAKITA defines the max. fastening torque as follows ;
    The torque level measured 3 seconds after starting to drive a bolt.
    Therefore, as you see in the chart below, the max. fastening torque of TW0350 is 350 N.m.




                                 450


                                 400


                                 350


                                 300
      Fastening torque ( N.m )




                                 250


                                 200

                                 150


                                 100

                                  50


                                   0
                                       0   0.5   1.0   1.5   2.0   2.5   3.0   3.5     4.0   4.5    5.0
                                                             Time (s)
                                                                                     MAKITA TW0350
                                                                                     MAKITA 6905B

                                                                                     Competitor Y   Model Y
                                                                                     Competitor X   Model X
                                                                                     Competitor Z   Model Z
Repair                                                                                                                P 4 / 10
< 1 > Lubrication
     Apply MAKITA grease N. No.1 to the following portions designated by black triangle to protect
     parts and product from unusual abrasion.

      Sleeve 18                                                Compression          19 cps. of
                                                               spring 28            steel ball 4
                                                                                                     Steel ball 6.4




                                                                                                                   Flat
                                                                                                    19
                                                                                                                   washer 8
         Hammer case           7              8                      10                13

                                                      Fig. 1


  Position                                           Portion                                                  Amount : g
  No.        Parts item                              to be lubricated                                                  ( oz )
                                * The surface which contacts sleeve 18.                                        0.5 (0.02)
     7       Anvil              * The wing portion which is percussed by cam portion of 8 Hammer.              3.5 (0.13)
                                   * The joining hole in which 13 Spindle is inserted.                         1.0 (0.04)
                                * The cam portion which transmits the percussion to 7 Anvil.                   3.5 (0.13)
     8       Hammer             * The inner surface where contacts 10 Spring holder.                           3.0 (0.12)
                                * The outer surface which contacts the inner surface of 8 Hammer               3.0 (0.12)
    10       Spring holder      * The edge portion where 19 pcs.of steel ball 4 roll.                          0.5 (0.02)
                                * The inner surface where contacts 13 Spindle.                                 0.5 (0.02)

             Spindle            * The groove where 2 pcs. of steel ball 6.4 roll.                              2.0 (0.08)
    13                          * The gear portion                                                             10 .0 (0.35)
                                * The teeth portion                                                            10 .0 (0.35)
    19       Spur gear 19-41
                                * The surface where flat washer 8 contacts.                                    0.1 (0.01)


< 2 > Removing armature
   ( 1 ) Remove brush holder cap and carbon brush.                        Hammer case
         See Fig. 2.                                                                                Mechanical section
                                                                          Hammer case cover
   ( 2 ) Remove hex socket head bolt M5x50, cup
                                                                                    Motor housing
         washer and urethane ring 5 each 4 pcs.
        See Fig. 2.
   ( 3 ) Separate mechanical section (hammer case
         and hammer case cover) from motor
         housing. Then, armature can be separated
         from motor housing together with
         mechanical section. See Fig. 2.                       Armature

   < Note >
   If the armature remains in the motor housing
   at the step (3), it can be removed by knocking                                                          Hex socket
   the edge of motor housing with plastic hammer.                                                          head bolt M5x50
                                                                                         Urethane ring 5
                                                                                    Cup washer
                                                                                                     Fig. 2
Repair                                                                                                            P 5 / 10
< 3 > Disassembling the mechanical section
    ( 1 ) Separate hammer case cover from hammer case by pulling in the vertical direction as illustrated in Fig. 3R
          in stead of Fig. 3F.

                        Hammer unit
                        (hammer, spindle,
                         compression spring 28, etc.)
        Hammer case




       Hammer case
       cover
                                                                                          The parts can fall
                                                                                          off the hammer case
                                                                                          cover.
                         Fig. 3R                                               Fig. 3F



    ( 2 ) Remove anvil and flat washer 19 from hammer case. See Fig. 4.
    ( 3 ) Remove the hammer unit and spur gear 19-41 and 3 pcs. of flat washer 8 from hammer case cover.
         See Fig. 5.

                                                              The hammer unit
                                This part can remain          (hammer, spindle,
                                in the hammer case.                                               Flat washer 8
                                                               compression spring 28, etc.)
                                        Anvil




                 Flat washer 19
                       Fig. 4                                        Spur gear 19-41     Flat washer 8
                                                                                    Fig. 5
                                                                < Note > Be careful, not to lose flat washers.


< 4 > Disassembling hammer unit
   ( 1 )Pull hammer toward gear
        side with "No.1R045 Gear
        extractor", and in order to
        take out steel ball 6.4
        align the top of cam groove
        of spindle with the opening     Steel
        portion of hammer.              ball 6.4
        See Fig. 6.
                                                                                       Gear

                                          Opening
                                            portion

                                          Top of cam
                                          groove



                                           Steel ball 6.4                                            Fig. 6
Repair                                                                                                          P 6 / 10
   ( 2 )After removing steel ball 6.4, loosen the handle of "No.1R045 Gear extractor" slowly until the spindle is free
        from the compression spring 28.
   ( 3 )Putting the hammer unit as illustrated in Fig. 7R, remove the following parts.
          * Hammer
          * Compression
                                                                                                 Spindle
            spring 28
                                         Hammer                                                     The steel balls 4
          * Spring holder
                                                                                                    fall off the spindle
          * 19 pcs. of steel
                                                                                                    and can be lost.
            ball 4
          * Spindle                 Compression
                                     spring 28
                                                                                                       Spring holder
                                        Spring holder                                                  Compression
                                                                                                       spring 28
                                   19 pcs. of steel ball 4
                                                                                                        Hammer
                                           Spindle

                                                       Fig. 7R                               Fig. 7F

< 5 > Assembling hammer unit
   ( 1 ) Put 19 pcs. of steel ball 4 in the groove of spindle's gear portion. See Fig. 8.
   ( 2 ) Put spring holder, compression spring 28 and hammer on the spindle. See Fig. 9.
   ( 3 ) Pressing the hammer to the gear side, align the top of cam groove of spindle with the opening of hammer.
         And mount 2 pcs. of steel ball 6.4 as illustrated in Fig. 10R.
         The assembling of hammer unit has been finished at this step.

                   19 pcs. of steel ball 4                                                         Steel ball 6.4
                                                                      Hammer

                     Apply grease to the groove                  Compression
                     of spindles's gear portion for              spring 28
                     prevention against the falling
                     off of steel ball.                           Spring holder
                                                             19 pcs. of steel ball 4

                                                                     Spindle
                          Fig. 8
                                                                                                          Steel ball 6.4
                                                                         Fig. 9




       Do not hold the hammer unit as illustrated
       in Fig. 10F, when pressing hammer to
       the gear side.
       The steel ball 4 can fall off the groove
       of spindle's gear portion and scatter in
       the hammer.

                                                                                                           Fig.10R




                                             Fig.10F
Repair                                                                                                       P 7 / 10
   ( 4 ) Mount the hammer unit and spur gear 19-41 to the hammer case cover. See Fig. 11.
         < Note >
           Do not forget to mount flat washers 8 to the following portion.
            * Spindle of hammer unit
            * Shaft of hammer case cover for spur gear 19-41 (both side of spur gear 19-41)

                          The hammer unit                                          Hammer
                          (hammer, spindle,                                        case cover
                                                             Flat washer 8
                           compression spring 28, etc.)




                                 Spur gear 19-41     Flat washer 8


                                                              Fig.11



   ( 5 ) Mount flat washer 19 and anvil to the hammer case. See Fig. 12.
   ( 6 ) Mount hammer case cover as illustrated in Fig. 13. The assembling of mechanical section has been finished
         at this step.

                                                                             Hammer unit
                              This part can remain                           (hammer, spindle,
                              in the hammer case.                             compression spring 28, etc.)
                                       Anvil                  Hammer case




                Flat washer 19
                            Fig.12                           Hammer case
                                                             cover




                                                                                    Fig.13
Repair                                                                                                                P 8 / 10
< 7 > Replacing electrical parts in the handle
    ( 1 ) Unscrew 2 pcs. of tapping screw 4x18 and remove handle cover. Then, the electrical parts
          (switch, line coil, resister, etc.) can be replaced. See Fig.14.



                                                                                     37
                                                                        34
                   Tapping screw 4x18


       34     Sponge

        37    Switch             Handle cover.
        38    Line coil
        39    Resister                                         38
        40    Terminal block                                                                                     39
        42    Noise suppressor
        48    Power supply cord                                                                                        40

        49    Cord guard                                                                             48
                                                                             42

                                                       Tapping screw 4x18
                                                                                  Strain relief      49

                                                              Fig.14




    ( 2 ) Put the sponge into the position as illustrated in Fig. 15.


    ( 3 ) Inflect the insulated terminals as illustrated in Fig. 16,                              Handle cover
          when connecting with switch terminals.


                                                                                                  If sponge is used, put it
                                                                                                  in the illustrated place.


                                                                                                   Fig.15



                Switch




                                    Fig.16
Circuit   diagram                                                                                           P 9 / 10

                                 Color index of lead wires
            Black                                  Purple
            White                                  Clear
            Red                                    Brown
            Orange                                 Blue




                                                                 For the countries where Radio
      For the other countries                                    Interference Suppression is required.

                                                                                             Brush holder
                                  Brush holder
                                                                                             Right
                                  Right

  Brush holder                                               Brush holder
  Left                                                       Left


 Brush holder                       Brush holder                                                  Brush holder
 (Left)                             (Right)                                                       (Right)
                                                                                     Field
                                                              Brush holder
                                                              (Left)

                                                               Fastened
                                                               on field           Tube
                                                               core.
                    2    5                                                      2    5
                    Switch                                                      Switch
                    3     6                                                      3      6




                                                                                Resister




                                                                                 Line
                                                                                 coil

                                                                                             red or white




                                     Power supply                             Terminal block        Power supply
                Terminal block       cord                      Noise
                                                               suppressor                           cord

  For some country insulated terminal can be used              For some country insulated terminal can be used
  in stead of terminal block.                                  in stead of terminal block.
   Wiring    diagram                                                                  P 10 / 10
                                                      Left side


                                         Right side

         Fasten the lead wire
         (clear) of noise
         suppressor with screw.

Insert the tube for protecting
lead wires, deep in the motor housing.




                                                                       Lead holder
       Lead holder                                          Hold the following lead wires
Hold the following lead wires                               with lead holder.
with this lead holder.                                      * Field lead wire (red) to be
* Lead wire (see through) of noise                            connected to switch
  suppressor                                                * Field lead wire (orange) to be
  This lead wire has to be put in                             connected to switch
  the bottom of lead holder.                                * Field lead wire (black) to be
 * Field lead wire (purple) to be                             connected to insulated terminal
   connected to switch                                        Resister
 * Field lead wire (white) to be
   connected to switch                                    The lead wires (red or white ) for
 * Field lead wire (black) to be       Line               connecting line coil with terminal
   connected to insulated terminal     coil               block have to be put as shown.
                                                          (between resister and noise
                                                          suppressor.
                       Terminal block

 Put lead wires of power supply cord                         Noise suppressor
 on the left side of rib.
                                                             Rib

                Line coil                                         Put the insulated terminals
                                                                  under the lead wires of
                                                                  power supply cord.




           Terminal block
  Do not cross the lead wires with which
  line coil and terminal block are connected.



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