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6935FD-TE


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T     ECHNICAL INFORMATION
    Models No.                  6935FD
                                                                                                  L
                                                                                                              PRODUCT
                                                                                                                P1/ 9

    Description                 Cordless impact driver
CONCEPT AND MAIN APPLICATIONS
  The above product has been launched in the market,
  having the following features.
  * With built-in LED job light                                                                                  H
  * Newly designed hammer case from which the projections for
    screw holes has been removed for increased maneuverability.
  * Phosphorescent (glow-in-the dark) bumper
  * Max. fastening torque : 140 N.m
                                                                                    W
   The variations of this model are as listed below.
    Model No.              Battery                          Q'ty       Charger                     Dimensions : mm ( " )
    6935FDWAE              Battery 1422 Ni-Cd 2.0 Ah         2                                Length ( L )   163 (6-3/8)
    6935FDWDE              Battery 1434 Ni-MH 2.6 Ah         2         DC1414                 Width ( W )      94 (3-11/16)
    6935FDWFE              Battery 1435 Ni-MH 3.0 Ah         2                                Height ( H )   239 (9-3/8)
    These 3 models come with battery cover and plastic carrying case together
    with the above charger and battery.

 Specification
              Voltage (V)                                                          14.4
    No load speed (min-1=rpm)                                                    0 - 2,600
    Impact per minute (min-1=bpm)                                                0 - 3,200
    Driving shank : mm ( " )                                                   6.35 (1/4) Hex
                Machine screw                                            M4 - M8 (5/32" - 5/16")
                Standard bolt                                            M5 - M14 (3/16" - 9/16")
    Capacities  High Tensile bolt                                        M5 - M12 (3/16" - 15/32")
                Coarse thread                                          22 - 125mm (7/8" - 5") in length
    Max. fastening torque : N.m (Kgf.cm)[in.lbs]                            140 (1,430) [1,240]
    Electric brakes                                                                 Yes
    Variable switch                                                                 Yes
    Reverse switch                                                                  Yes
    Net weight: kg (lbs)                                                          1.7 (3.8)


 Standard equipment
   * Battery cover ......................... 2 pcs.
   * Plastic carrying case ............. 1 pc.


   < Note > The standard equipment for the tool shown may differ from country to country.


 Optional       accessories
   * Various socket bits                * Battery 1420   Ni-Cd 1.3Ah     * Charger DC1414
   * Various drill chuck set            * Battery 1422   Ni-Cd 2.0Ah     * Charger DC1439
   * Bit piece                          * Battery 1434   Ni-MH 2.6Ah     * Charger DC1804
   * Stopper for impact driver          * Battery 1435   Ni-MH 3.0Ah     * Automotive charger DC1422
                                                                                                               P2/9

Features             and benefits

                                                  Compact Design with an Overall
                                                  Length of 163mm (6-3/8")

 Hammer Case of New Design
 Elimination of screw hole protrusions                                                     Powerful and Compact
 reduces possibility of scratches on                                                       D28 Type DC Motor
 materials in operation, increasing
                                                                                       *Rare earth magnet provides
 maneuverability to a great extent.
                                                                                        strong power.
                                                                                       *Motor life is extended by efficient
                                Eliminatied                                             cooling, replaceable armature, and
                                                                                        externally accessible carbon brush.


                                                                                          Rubberized Soft Grip
                    LED Job light
                                                                                     Is ergonomically contoured to fit
                 For illuminated operation                                           your palm perfectly for much more
                                                                                     comfortable and controlled operation.
   Phosphorescent
   (glow-in-the dark) bumper                                                            Hand strap can be attached.
 Enables you to easily find this tool
 in dark locations.
                                                                                        14.4 V Cluster Type Battery
   Easy-to-Operate Large Trigger Switch
   for Variable Speed Control


Comparison               of products
                             Model No.                      Makita                             A
      Specifications                           6935FD       6932FD      BTD150                 A
               Voltage : V                      14.4          14.4        14.4                14.4
 Battery




               Current capacity : Ah             2.6           2.6         2.0                 1.7
               Battery cell                    Ni-MH        Ni-MH        Ni-MH               Ni-Cd
  Charging time : min.                        approx. 60   approx. 60   approx. 30         approx. 45
 Max.                                            140           125         130                132
 fastening torque : N.m [ in.lbs]              [1,240]       [1,110]     [1,150]            [1,150]

 No load speed (min-1=rpm)                    0 - 2,600     0 - 2,300   0 - 2,300           0 - 2,400
 Impact per minute (min-1=bpm)                0 - 3,200     0 - 3,000   0 - 3,000           0 - 3,000
 Material of hammer case                      Aluminum     Magnesium    Aluminum          Magnesium
 LED job light                                   Yes          Yes          No                  No
 Externally accessible brush                     Yes          Yes          Yes                 No
 Soft grip                                       Yes          Yes          Yes                Yes
                                                 163          165          190                167
                 Length : mm [ " ]
                                               [6-3/8]       [6-1/2]     [7-1/2]            [6-9/16]
  Dimensions




                                                  94           94           78                 82
                 Width : mm [ " ]              [3-11/16]    [3-11/16]    [3-1/16]            [3-1/4]

                                                 239           238         253                235
                 Height : mm [ " ]
                                               [9-3/8]       [9-3/8]       [10]              [9-1/4]
 Net weight : Kg [lbs]                            1.7           1.7         1.8                1.8
                                                [ 3.7 ]       [ 3.7 ]     [ 4.0 ]            [ 4.0 ]
                                                                                                                       P3/ 9
Comparison       of products
  Numbers in the charts below are relative values when the results for the Model A of the competitor A
  has been indexed at 100.
  < Note > The working speed and amount may differ, depending on the condition of wooden materials.

                                                   Comparison in fastening work

                                        Driving single speed                                Fastening amount
  Testing condition                                                                         with one fully charged battery
   * Material: Spruce    * Fastener : Coarse thread 41mm
                                          Slow             Fast                                 Few          Many

MAKITA 6935FD (2.6Ah)                         110                       0.6 sec.                     190            800 pcs.

MAKITA 6932FD (2.6Ah)                         110                                                    190

  A         A     (1.7Ah)                     100                                      100
MAKITA 6337D (2.6Ah)
                                               85                                                    200
(high speed mode)

                             0    20     40        60     80      100   120        0   50      100     150 200 250       300
   Testing condition
    * Material: Spruce      * Fastener : Coarse thread 90mm

                                          Slow             Fast                                 Few          Many

MAKITA 6935FD (2.6Ah)                         110                       3.5 sec.                     200            130 pcs.

MAKITA 6932FD (2.6Ah)                         100                                                    170

   A         A    (1.7Ah)                     100                                      100

                             0    20     40        60     80      100   120        0   50      100     150   200 250    300
   Testing condition
    * Material: Spruce      * Fastener : Lag bolt 1/4"
                                          Slow             Fast                                 Few          Many

MAKITA 6935FD (2.6Ah)                         110
                                              105                       4.2 sec.                     200             95 pcs.

MAKITA 6932FD (2.6Ah)                         100                                                    190

   A         A    (1.7Ah)                     100                                      100
MAKITA 6337D (2.6Ah)
                                               95                                                    240
(low speed mode)

                             0    20     40        60     80      100   120        0   50      100     150   200 250    300

                                                        Comparison in drilling

   Testing condition                    Drilling single speed                                 Drilling amount
    * Material: Spruce      * Bit : Auger bit 1"                                              with one fully charged battery

                                          Slow             Fast                                 Few          Many

MAKITA 6935FD (2.6Ah)                         105                       6.0 sec.                       210           70 pcs.
MAKITA 6932FD (2.6Ah)                         95                                                       185
   A         A    (1.7Ah)                     100                                      100
MAKITA 6337D (2.6Ah)                          110                                                      320
(low speed mode)
                             0    20     40        60     80      100   120        0   50      100     150   200 250    300
                                                                                                                   P4/ 9
Repair
1) Disassembling
1) -1. Disassembling Sleeve Section (Fig. 1)
      (1) Remove ring spring from the groove on anvil.
      (2) Now flat washer, compression spring 13, sleeve and 2 pcs of steel ball 3.5 can be removed from anvil.
      (3) Anvil can be removed from hammer case.
      Fig. 1

                                Compression spring 13
                  Ring spring          Sleeve Groove             Steel ball 3.5 x 2 pcs.




                                                Anvil
                     Flat washer                                   Apply Makita grease N.No.2 to the
                                                                   cylindrical portion of anvil before mounting.


1) -2. Removing Hammer Case Complete
     (1) Pull LED circuit section out of housing by removing PT3 x 10 tapping screw. ( Fig. 2)
     (2) Remove stopper by removing PT3 x 16 tapping screw. (Fig. 2)
      Fig. 2


                                                                                                      Stopper




                                                                                                    Tapping screw
                                          LED circuit                                               PT3 x 16
                                          section
        Tapping screw
        PT3 x 10

     (3) Remove bumper from hammer case. (Fig.3)                 Fig. 3

     (4) Fit socket 30-78 (Part No.134847-1) over the hex
        portion of hammer case.
        And then remove hammer case from housing by
        turning the socket clockwise as illustrated in Fig. 4.
                                                                                                       Bumper




      Fig. 4
            Hammer case




                                             Socket 30-78
                                             (134847-1)
                          Hex portion
                          of hammer case
                                                                                                            P5/9

Repair
1) -3. Disassembling Housing
   (1) After removing brush holder caps and carbon brushes, remove hammer section, ring 41 and internal gear 51
        from housing. (Fig. 5)
   (2) Remove internal gear 51 by unscrewing 4 pcs. of pan head screw M4x12. (Fig. 6)
   (3) Remove eight PT3x16 tapping screws. Now housing R can be separated from housing L. (Fig. 7).

  Fig. 5                                                    Fig. 6



             Internal gear 51   Ring 41                        Internal gear case       Pan head
                                          Hammer section                                screw M4x12
     Carbon brush
                                                                                            < Note >
                                                                                            The pan head screws
                                                                                            M4x12 are adhesive ones.
                                                                                            It is recommended
                                                                                            to employ impact driver
                                                                                            for unscrewing them.
    Brush holder
    cap



  Fig. 7




                                                                        Tapping screw
                                                                        PT3x16




                                                                     Housing R




                Housing L
                                                                                                                  P6/9

Repair
1) -4. Disassembling Hammer and Spindle Section
      (1) Press down hammer with Large gear extractor (1R045) by turning the handle. (Fig. 8)
      (2) Adjust the opening for steel ball insertion to the top of cam groove on spindle. (Fig. 8)
      (3) Remove 2 pcs of steel ball 5.6 from spindle. (Fig. 8)
      (4) Hold the hammer section as illustrated in Fig. 9, and then loose the handle of large gear extractor.
         Caution: Do not hold gear extractor as illustrated in Fig. 8 when loosening the handle of gear extractor.
                  Failure to follow this instruction could cause steel balls 3.5 to get out of hammer.
      (5) Now hammer section can be disassembled as illustrated in Fig. 10.
      (6) After removal of flat washer 24, steel balls 3.5 can be removed from hammer. (Fig. 11)

      Fig. 8                                                                    Fig. 9

                               Spindle
                                                      Steel ball 5.6
          Top of cam groove
          on spindle




          Opening for steel                                   Hammer
          ball insertion




      Fig. 10                                                                        Fig. 11

           Spindle section

                                                               Flat washer 12
                                              Pin 5                                                       Hammer




         Cup                                                                                              Steel ball 3.5
         washer 14                                                                                        (24 pcs.)

        Compression
        spring 25                                                 Spur gear 22
                                             Spindle
                                                                                                          Flat washer 24

          Hammer
                                                                                                                P7/9

Repair
2) Assembling
2) -1. Assembling Sleeve Section
    Do the reverse of disassembling procedure.
2) -2. Assembling Hammer and Spindle Sections
    (1) Before assembling the parts, apply Makita grease N. No.2 to the following parts.
        * Top of the spindle where anvil contacts: approx. 0.5 g
        * 2 pcs of steel ball 5.6: approx. 0.5 g
        * 24 pcs of steel ball 3.5 which are mounted to hammer: approx. 0.5 g
        * 2 pcs of spur gear 22: approx. 2.0 g
   (2) And then do the reverse of disassembling procedure. (Fig. 11, 10, 9 and 8)
       Note: Make sure that all of 24 steel balls (size = 3.5) are installed on hammer. (Fig. 11)
2) -3. Assembling Housing
     When assembling the housing, be sure to follow the instructions below.
       1. Before mounting the internal parts, make sure that rubber pin 4 is installed on
          each of housing R and L. ( Fig. 12)
       2. When mounting FET and FET spacer to yoke unit, tighten a ST3x8 tapping screw
          to the recommended torque of 1.1 - 1.5N.m (11 - 15kgf.cm). (Fig. 13)
       3. When fastening housing R to housing L, tighten each of eight PT3x16 tapping screws
          to the recommended torque of 1.1 - 1.3N.m (11 - 13kgf.cm). (Fig. 14)
       4. When mounting LED circuit section, tighten a tapping screw PT3 x 10
          to the recommended torque of 0.54 - 0.66N.m (5.3 - 6.5 kgf.cm).
          (See Fig. 2 in page 4.)
   Fig. 12


               Housing L                                                                      Housing R
                                        Switch




                                                     Rubber pin 4
                                      Make sure that rubber pin 4 is installed on
                                      each of housing R and L.

   Fig. 13                                             Fig. 14

                                      Yoke unit                                                     Tapping screw
                                                                                                    PT3x16 (8 pcs)

                                   FET spacer

                                     FET
                                     (Field effect
                                     transistor)

                                                                                                       Housing R
         Tapping screw
         ST3x8
                                                         Housing L
                                                                                                                P8/9

Repair
    2) -4. Assembling Hammer Case to Housing
    (1) When mounting internal gear case to housing, be sure to follow the instructions below. (Fig. 15)
        * Always use brand-new M4x12 pan head screw.
        * Tighten each of four M4x12 pan head screws to the
          recommended torque of 0.88 - 1.8 N.m (9.0 - 18 kgf.cm).

    (2) Fit socket 30-78 (Part No.134847-1) over the hex portion of hammer case, and then tighten
        the socket to the recommended torque of 25 - 30 N.m (260 - 310 kgf.cm). (Fig.16)
        Caution:
        Do not fail to install anvil on hammer case before fastening hammer case to housing.

    Fig. 15                                           Fig. 16
                                                                                         Hammer case
      Internal gear case Pan head screw M4x12




                                                                                                 Anvil


                                                                                      Hex portion            Socket 30-78
                                                                                      of hammer case         (134847-1)



    (4) Install stopper on housing.
        Caution:
        Because stopper is not reversible when installed on housing, be sure to place it as illustrated in Fig. 17.
    Fig. 17


                                                                Correct
                                                                                          Stopper




                                                                Wrong
                                                                                                       P9/9
Circuit   diagram
  Endbell                                                     Color index of lead wires' sheath
                                                               Black
                                                               Red


                                                 FET
                                                 (Field Effect Transistor)




                                         M2
                                                                              LED circuit
                                  M1

                               Switch




Wiring    diagram
                                         Before installation of internal parts

                                                                                 Put the slack portion of LED
                                                                                 lead wires here.

                                                                                                  LED circuit
                                                                                                  section




  After installation of internal parts                                                  Boss

                                                                                   Put the following lead wires
 Endbell complete                                                                  deep in the lead holder.
                                                                                    * Lead wire (black) of LED
                                                                                    * Lead wire (red) of LED



                    Motor

                                                  FET




                                                    LED circuit
                      Switch
   Rib                                              section

                                           Route endbell lead wire (black)
                                           between FET and the rib.



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