Makita 6991D Manuel

Models No.

Description

PRODUCT

TECHNICAL INFORMATION

CONCEPTION AND MAIN APPLICATIONS

Specification

Standard equipment

Optional accessories

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

P 1 / 5

6991D, 6992D

9.6V Cordless Impact Wrench

These models are 9.6V cordless impact wrenches with more compact

and light weight body comparing with Mod.6909D,

but their fastening torques are more powerful than the existing.

Model 6991D is 9.5mm (3/8") square drive type and

Model 6992D is 12.7mm (1/2") square drive type.

The variations of these models are as listed below.

Model No. No.

Battery

Type Charger

Q'ty

6991, 6992DWA

6991, 6992DWAE

1 pc.

DC1411

2 pc.

6991, 6992DWD

6991, 6992DWDE

6991, 6992DWF

6991, 6992DWFE

2 pc.

9122 2.0

9122

9134

9135

2.0

2.6

Ni-Cd

Ni-MH 3.0

3.0

No load speed (min-1=rpm)

Voltage (V)

Model No.

Capacities

Impact per minute (min-1=bpm)

Max.fastening torque

Net weight: kg (lbs)

D/C 9.6 V

Standard bolt

High tensile bolt

100N.m (1,020Kgf.cm, 880in.lbs)

(when fastening high tensile bolt M12 for 3 sec.)

Driving shank : mm ( " ) 9.5 ( 3/8 ) Square 12.7 ( 1/2 ) Square

1.4 (3.1 lbs)

M8 - M14 (5/16" - 9/16")

M6 - M10 (1/4" - 3/8")

0 - 2,300

0 - 3,000

6991D 6992D

1.3 (2.9 lbs)

* Battery Cover ...................................................... 1 pc.

* Socket 19 - 38 with 12.7mm square drive ........... 1 pc. for Model 6992D (except North American market)

* O ring 24 .............................................................. 1 pc. for Model 6992D (except North American market)

* Plastic carrying case ............................................. 1 pc.

* Various socket ( only 12.7 mm square drive)

* Set plate for battery without push button

* Battery 9133

* Battery 9134

* Battery 9135

* Battery 9100

* Battery 9102

* Battery 9102A

* Battery 9120

* Battery 9122

* Charger DC1411

* Charger DC1801

* Automotive charger DC1422

Dimensions : mm ( " )

Width ( W )

Model No.

Height ( H )

Length ( L )

77 (3)

231 (9-1/8)

77 (3)

231 (9-1/8)

168 (6-5/8) 176 (6-15/16)

6991D 6992D

Comparison of products

Features and benefits P 2 / 5

Model 6991D : 9.5mm (3/8") square drive type

Model 6992D : 12.7mm (1/2") square drive type

The lightest weight in each class

Model 6991D : 1.3 Kg (including any of battery 9122, 9134 or 9135)

Model 6992D : 1.4 Kg (including any of battery 9122 or 9135)

9.5mm square drive

for Mod. 6991D

12.7mm square drive

for Mod. 6992D

Magnesium alloyed

hammer case.

Easily operateable variable

speed control switch

Set plate (optional accessory)

can be attached

for the battery without

push button. High capacity battery 9135 with 3.0Ah

can be used.

Palm-fitly, Soft Grip

Newly designed D28 type motor

with the following features

* more compact and light weight

* Externally accessible brush

* Replaceable armature

* Effective cooling

Push Button for Reversing

More compactly designed body

Refer to the comparisons listed

below.

Model No.

Specification

Square drive : mm ( " )

Manufacturer

No load speed : (min -1= rpm)

Blows per min : (min -1= bpm).

Equipped motor

Max. fastening torque (N.m)

Externally accessible brush

Overall length : mm

Net weight :Kg (lbs )

MAKITA

6991D 6909D 6907D

0 - 2,300 0 - 2,200 0 - 2,000

0 - 3,000 0 - 2,800 0 - 2,600

D28-15 D31- 16 RS750

100 88 69

Yes Yes No

168 (6-5/8) 170 (6-11/16) 185 (7-9/32)

1.3 (2.9) 1.4 (3.1) 1.3 (2.9)

9.5mm (3/8") square drive type models

9.5 (3/8) 9.5 (3/8) 9.5 (3/8)

Model No.

Specification

Square drive : mm ( " )

Manufacturer

No load speed : (min -1= rpm)

Blows per min : (min -1= bpm).

Equipped motor

Max. fastening torque (N.m)

Externally accessible brush

Overall length : mm ( " )

Net weight :Kg (lbs )

MAKITA

6992D Model A-1

0 - 2,300 0 - 2,200

0 - 3,000 0 - 2,900

D28-15

100 98

Yes Yes

176 (6-59/64) 181 (7-1/8)

1.4 (3.1) 1.6 (3.6)

12.7mm (1/2") square drive type models

12.7 (1/2) 12.7 (1/2)

Competitor A

Repair P 3 / 5

< 1 > Removing housing R and L

Remove hammer case from housing R and L.

And then, housing R and L can be removed.

< 2 > Removing hammer

(1) Press down hammer with 1R045: Large gear extractor

by turning the handle.

(2)Adjust the opening for steel ball inserting to the cam groove top of spindle.

(3)Take off steel ball 5.6 from spindle.

< Note > 25 steel balls 3.5 are installed in hammer.

Check the quantity when assembling.

Fig. 1

Spindle

Cam groove top

of spindle

Opening for steel

ball inserting

Steel ball 5.6 x 2

Steel ball 3.5 x 25

Hammer

1R045 Large gear extractor

L= 85mm

L=105mm

L=130mm

W: The maximum opening width

is 170mm.

(4) Spur gear 22

(4) Apply MAKITA grease N No.2 to the position No. 1, 2,

3 and 4, when assembling. (1) Spindle

(3) Opening for

steel ball inserting

Steel ball 3.5 x 25 (2) Hammer

(4) Spur gear 22

Fig. 2

(1) Spindle : 0.5g

(2) Hammer : 0.5g

(3) Opening for

steel ball inserting : 0.5g

(4) Spur gear 22 : 2.0g

Repair P 4 / 5

< 3 > Removing ball bearing 6901LLB

< 4 > Fastening torque for tapping screws

Give a shock by knocking internal gear case

on the working table.

Ball bearing 6901LLB can be removed

from internal gear case by the shock.

Ball bearing 6901LLB

Internal gear case

Fig. 3

Circuit diagram

Switch

M2 M1

FET

(Field Effect Transistor)

Black

Red

Brush holder

Fastened position

Tapping screws Fastening torque: N.m (Kgf.cm)

Housing set (R & L)

4 x 18

4 x 25

3 x 8

*Hammer case

FET Spacer

1.27 - 1.76 (13 - 18)

1.76 - 2.16 (18 - 22)

1.1 - 1.5 (11 - 15)

< Note > Hammer case has to be fastened diagonally as illustrated in Fig. 4, when assembling.

Fig. 4

Hammer case

Wiring diagram P 5 / 5

Pass the lead wires as illustrated in Fig.5.

FET

(Field Effect Transistor)

FET lead wires Rib

Lead wire (Black) to be

connected to switch has to be passed

under the lead wire (Red).

Lead wire (Red) to be

connected to switch

Fig.5

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