Hitachi C 6MFA Manuel

TECHNICAL DATA

AND

SERVICE MANUAL

CIRCULAR SAWS

C 6MFA

C 7MFA

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

LIST Nos. C 6MFA: E502

C 7MFA: E503 Jan. 2005

MODELS

C 6MFA

C 7MFA

Hitachi



Power Tools

REMARK:

Throughout this TECHNICAL DATA AND SERVICE MANUAL, a symbol(s)

is(are) used in the place of company name(s) and model name(s) of our

competitor(s). The symbol(s) utilized here is(are) as follows:

Symbols Utilized Competitors

Company Name Model Name

BOSCH GBM13-2RE

For Models D 13VB3 and D 13VH

Symbols Utilized Competitors

Company Name Model Name

BOSCH GBM10-2RE

For Model D 10VJ

Page

CONTENTS

1. PRODUCT NAME........................................................................................................................... 1

2. MARKETING OBJECTIVE ............................................................................................................. 1

3. APPLICATIONS.............................................................................................................................. 1

4. SELLING POINTS .......................................................................................................................... 1

4-1. Selling Point Descriptions ............................................................................................................... 2

5. SPECIFICATIONS .......................................................................................................................... 3

6. COMPARISONS WITH SIMILAR PRODUCTS .............................................................................. 4

7. PRECAUTIONS IN SALES PROMOTION ..................................................................................... 4

7-1. Handling Instructions ...................................................................................................................... 4

8. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY ............................................................ 5

8-1. Disassembly ................................................................................................................................... 5

8-2. Reassembly .................................................................................................................................... 8

8-3. Insulation Tests ..............................................................................................................................11

8-4. Deflection of Saw Blade.................................................................................................................11

8-5. Cleaning the Case .........................................................................................................................11

9. STANDARD REPAIR TIME (UNIT) SCHEDULES ....................................................................... 12

Assembly Diagram for C 6MFA

Assembly Diagram for C 7MFA

--- 1 ---

1. PRODUCT NAME

Hitachi Circular Saw, Model C 6MFA [165 mm (6-1/2")]

Hitachi Circular Saw, Model C 7MFA [190 mm (7-1/2")]

2. MARKETING OBJECTIVE

Circular saw market in the European countries are mainly demanding the heavy-duty machines for professionals.

However, potential demands for reasonably priced and light-duty machines are seemed to be strong. We will

expand selling the circular saws with reasonable price and high performance for European countries to find a new

market. The key features are as follows:

(1) Provided with parallel adjustment system

(2) Adopting base made of aluminum which is strong and precise

(3) Reasonable price

3. APPLICATIONS

Cutting of various wood materials

4. SELLING POINTS

C 7MFA

40T TCT saw blade

(C 6MFA: 165 mm dia.)

(C 7MFA: 190 mm dia.)

Provided with parallel adjustment

Accurate and sturdy

aluminum die-cast base

Double-insulated construction

--- 2 ---

4-1. Selling Point Descriptions

(1) Parallel adjustment system

The parallelism can be easily fine-adjusted by using the parallel adjustment system. The parallelism may be

slightly shifted when the cutting depth is adjusted. If the parallelism is shifted, adjust it according to the

following procedure.

(a) Loosen the locking screw of the saw cover hinge (Fig. 1).

(b) Draw the protective cover in the saw cover.

(Fig. 2).

(d) Move the marked piece of wood to the front of the base and turn the parallel adjustment screw until the

mark aligns with the side of the base (Fig. 3).

(e) After adjustment, tighten the locking screw securely.

(2) Accurate and sturdy aluminum die-cast base

Thanks to the sturdy aluminum die-cast base, the Models C 6MFA/C 7MFA can cut workpieces accurately and

the cut surfaces of the workpieces are smooth.

(3) High performance 40-tooth tungsten carbide tipped (TCT) saw blade as standard

High performance TCT saw blade (40 teeth) is provided as standard instead of the conventional combination

blade. The Models C 6MFA and C 7MFA provide greater maximum cutting depth than the conventional

models by using a 165 mm dia. TCT saw blade and a 190 mm dia. TCT saw blade respectively.

(4) Double-insulated construction

Grounding is not required thanks to the double-insulated construction.

Fig. 1 Fig. 2 Fig. 3

Saw cover

Mark

Parallel

adjustment

screw

Lower guard

Mark

--- 3 ---

Housing

Handle cover

Gear cover

Lower guard

Base

Polycarbonate resin

Standard equipment Tungsten carbide tipped (TCT) saw blade •••••••••••••••••••••••••••••••••••••••••• 1

Box wrench •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1

Parallel guide ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1

Hex. bar wrench ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1

Type of motor

Enclosure

Weight

AC single phase 50/60 Hz

Cutting depth at 90˚

Cast aluminum

Power source

Power input

at 45˚

* Voltage (V)

* Current (A)

Rotation speed

Cord

No-load

Gross

Net

Full-load

Type

Overall length

5,450/min.

1,010 W

3,550/min.

2.5 m (8.2 ft.)

110

9.6

5. SPECIFICATIONS

165 mm (6-1/2")

Two-core cabtire cable

Model

Saw blade diameter

C 6MFA

0 to 57 mm (0 to 2-1/4")

C 7MFA

AC single phase commutator

Packaging Corrugated cardboard box

190 mm (7-1/2")

0 to 68 mm (0 to 2-11/16")

Max. 38 mm (1-1/2") Max. 46 mm (1-13/16")

Type of switch Trigger switch

240

4.4

5,800/min.

3,780/min.

3.4 kg (7.5 lbs) 3.6 kg (7.9 lbs)

4.5 kg (9.9 lbs) 4.9 kg (10.8 lbs)

230

4.6

5,950/min.

4,190/min.

* Check the tool name plate to confirm the rating, as it is subjected to change by area.

--- 4 ---

Provided

Aluminum

None

291

242

210

190 (7-1/2")

C 7MFA

291

544

1,010

5,950

68 (2-11/16")

46 (1-13/16")

5,500

3.6 (7.9 lbs)

4,190

1,580

Provided

Aluminum

None

276

230

210

165 (6-1/2")

C 6MFA

276

544

1,010

5,950

57 (2-1/4")

38 (1-1/2")

5,500

3.4 (7.5 lbs)

4,190

1,580

None

Aluminum

Provided

294

240

215

6. COMPARISONS WITH SIMILAR PRODUCTS

Material of base

Max. cutting

depth 90˚

Saw blade diameter

Parallel adjustment

45˚

Full-load output

Max. output

Material of lower guard

Riving knife

Maker •Model

No-load noise

No-load rotation speed

Full-load rotation speed

/min.

HITACHI

Catalog

Characteristic

Weight

Power input

Overall length

No-load rotation speed /min.

/min.

Structure

Lmm

None

Aluminum

Provided

272

228

208

165 (6-1/2")

C 6U

272

600

1,010

4,810

55 (2-5/32")

40 (1-9/16")

5,000

3.5 (7.7 lbs)

3,350

1,440

185 (7-1/4")

C 7U

294

710

1,150

4,940

65 (2-9/16")

47 (1-27/32")

5,000

4.0 (8.8 lbs)

3,730

1,600

7. PRECAUTIONS IN SALES PROMOTION

In the interest of promoting the safest and most efficient use of the Models C 6MFA and C 7MFA Circular Saws by

all of our customers, it is very important that at the time of sale the salesperson carefully ensures that the buyer

seriously recognizes the importance of the contents of the Handling Instructions.

7-1. Handling Instructions

Although every effort is made in each step of design, manufacture, and inspection to provide protection against

safety hazards, the dangers inherent in the use of any electric tool cannot be completely eliminated. Accordingly,

general precautions and suggestions for the use of electric power tools, and specific precautions and suggestions

for the use of the circular saw are listed in the Handling Instructions to enhance the safe and efficient use of the

tool by the customer. Salespersons must be thoroughly familiar with the contents of the Handling Instructions to

be able to offer appropriate guidance to the customer during sales promotion.

* The above figure is based on the 230 V motor.

--- 5 ---

8-1. Disassembly

8. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY

The procedures for disassembly and reassembly and certain precautions are described below.

The [Bold] numbers in the descriptions below correspond to the item numbers in the Parts List for all the models.

In disassembly or reassembly and also in other work, the Base Ass'y [63] should be carefully handled to prevent

the loss of the accuracy of each part, such as the flatness of the bottom surface.

Fig. 4

(3) Removing the Spindle and Gear Set [2] (See Fig. 4.)

Hold the Bearing Holder [3] in a cylindrical jig with an inside

diameter of 42 mm to 43 mm (approx. 1-23/32"), and remove

it by pushing the end of the Spindle and Gear Set [2].

Important: A gear, once removed, cannot be used again

because it no longer engages. It must be

replaced by a new Spindle and Gear Set [2].

(4) Removing the Housing Ass'y [20]

(a) Loosen the Brush Caps [42] with a flat-blade screwdriver

and remove the Carbon Brushes [41].

(b) Loosen the Machine Screws (W/Washers) M5 x 45 (Black)

[17] securing the Housing Ass'y [20], and remove the

Housing Ass'y [20] and Gear Cover Ass'y [35].

(1) Removing the Lower Guard [6]

(a) Detach the hook of the Return Spring [7] from the Lower Guard [6].

(b) Loosen the Seal Lock Flat Hd. Screw M3 x 12 [10] securing the Bearing Cover [9], and remove the

Bearing Cover [9] and the Lower Guard [6].

(2) Removing the Bearing Holder [3]

Loosen the Seal Lock Flat Hd. Screw M5 x 12 [4], remove the Bearing Holder [3] together with the Spindle

and Gear Set [2].

Before disassembly, be sure to remove the saw blade to prevent damage to the cutting edge or

injuries by the saw blade.

[2] [3]

--- 6 ---

(5) Removing the Armature [29] (See Fig. 5.)

(a) Remove the Lock Lever [48] and tap the end surface of the Housing Ass'y [20] with a wooden hammer.

The Armature [29] and the Fan Guide [28] can then be removed.

(b) Remove the Fan Guide [28], Thrust Washer [22] and Bearing Lock [21].

and remove Washer (A) [24].

Fig. 5

Fig. 6

(6) Removing the Stator Ass'y [27] (See Fig. 6.)

(a) Loosen the two Hex. Hd. Tapping Screws D5 x 55 [47].

(b) Remove the two Brush Terminals [25] from the brush holders of the Housing Ass'y [20].

[27].

[21]

[24]

[28] [29]

[48] [49]

[23]

[22]

[20]

[47]

[25]

[27]

--- 7 ---

(7) Removing the Base Ass'y [63] (See Fig. 7.)

(a) Loosen the Seal Lock Screw (W/Sp. Washers) M6 x 14 [65], then remove Lever (A) [66], Lock Nut [67],

Washer [68] and Bolt (Square) M6 x 20 [53].

(b) Loosen the two Hex. Socket Set Screw M5 x 6 [34] of the Gear Cover Ass'y [35] and the hex. socket screw

in the Sleeve [58] to remove the Sleeve [58].

can be removed.

Fig. 7

[58]

[68]

[66]

[65]

[35]

[34]

[64]

[63]

[53]

[67]

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