Hitachi CR 13VA User Manual 2

RECIPROCATING SA W

MODEL

CR 13VA

POWER TOOLS

TECHNICAL DATA

AND

CR 13VA

SERVICE MANUAL

LIST No. E930 May 2000

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

Notice for use

Specifications and parts are subject to change for improvement. Refer to Hitachi Power Tool Technical News for further information.

CONTENTS

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

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

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

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

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

4-2. Descriptions of patent pending ....................................................................................................... 5

5. SPECIFICATIONS .......................................................................................................................... 6

5-1. Specifications.................................................................................................................................. 6

Page

5-2. Optional Accessories ...................................................................................................................... 7

6. COMPARISONS WITH SIMILAR PRODUCTS .............................................................................. 9

6-1. For USA Market .............................................................................................................................. 9

6-2. For European Market ...................................................................................................................... 9

7. COMPARISONS IN CUTTING TIME ............................................................................................ 10

7-1. Cutting Steel Pipes ....................................................................................................................... 10

7-2. Cutting Wood .................................................................................................................................11

7-3. Cutting Wood with Saw Blade Installed Upside Down.................................................................. 12

7-4. Cutting Operation for Long Blade Life .......................................................................................... 13

8. PRECAUTIONS IN SALES PROMOTION ................................................................................... 14

8-1. Handling Instructions .................................................................................................................... 14

8-2. Caution on Name Plate................................................................................................................. 14

9. REPAIR GUIDE ............................................................................................................................ 15

9-1. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY............................................................ 15

9-2. Lubrication .................................................................................................................................... 24

9-3. Tightening Torques ....................................................................................................................... 24

9-4. Wiring Diagram ............................................................................................................................. 24

10. CONFIRMATION AFTER REASSEMBLY .................................................................................. 26

10-1. Lead Wire Precautions .............................................................................................................. 26

10-2. Insulation Tests ........................................................................................................................... 26

10-3. No-Load Current Value ............................................................................................................... 26

11. STANDARD REPAIR TIME (UNIT) SCHEDULES...................................................................... 27

Assembly Diagram for CR 13VA .......................................................................................................... 28

Assembly Diagram for CR 13VA [For the U.S.A. and Canada only] .................................................... 32

1. PRODUCT NAME

Hitachi 130 mm (5") Reciprocating Saw, Model CR 13VA

2. MARKETING OBJECTIVE

There is increasing demand for a high-speed and powerful saber saw in overseas markets. The new Model CR 13VA, which features a powerful motor and a swing cutting action, has been developed to meet that market demand. The swing cutting action is a new technology, in which the saw blade is swung like a pendulum, regardless of whether the saw blade is mounted upward or downward. The Model CR 13VA is at the top of its class in flash-cutting speed for two-by-four construction (on the floor). The Model CR 13VA employs various convenient functions, including a detachable mechanism that enables onehand mounting and removal of saw blades without the use of a wrench or other tools.

3. APPLICA TIONS

Cutting metal, wood and plastics etc.

4. SELLING POINTS

Saw blade can be mounted and removed without the use of tools

Saw blade can be mounted in either direction, upward or downward

Dust- and waterresistant triplesealing construction

Base position is adjustable without the use of tools

Sturdy and heat-resistant thanks to the doublemolded front cover

Top-of-class cutting speed thanks to the high-power 1000 W motor and the swing cutting action

Soft-touch rubber grip handle

Convenient switch trigger and dial speed scale

Powerful new design

Seven patents pending

--- 1 ---

4-1. Selling Point Descriptions

(1) Fast cutting speed

The Model CR 13VA can cut various construction materials fast and efficiently thanks to the high-power motor whose maximum output is over 1000 W (Model CR 10V: 680 V).

(2) Saw blade can be mounted and removed without the use of tools (patent pending)

Generally, conventional saber saws required a blade holder and a bolt to secure the saw blade. Such inconvenience was a cause of inefficient operation because the operator kept using a dull blade without replacing it with a new one, even though a saber saw blade is apt to wear out due to its applications. The Model CR 13VA eliminates such inconvenience by adopting the Hitachi-original detachable mechanism that enables one-hand mounting and removal of saw blades without the use of a wrench or other tools.

< Features of the Hitachi-original detachable mechanism >

The saw blade can be mounted and removed just by turning the holder sleeve.

The sleeve holder can be automatically secured in a released state by turning it all the way. In the

released state, the built-in spring force pulls the holder pin back to the correct position automatically. Thus, saw blades can be smoothly replaced with one hand.

Competitors' products require two-hand operation.

Refer to the Handling Instructions and the leaflets for detailed information about saw blade replacement.

< Construction of detachable mechanism >

Helical groove to pull back the holder sleeve

Spring to pull back the holder pin

Blade

Plunger (reciprocating shaft)

Holder pin to secure the blade

Holder sleeve for blade replacement

--- 2 ---

(3) Saw blade can be mounted in either direction, upward or downward

The Model CR 13VA is convenient for cutting materials on the floor or near window frames, and also for plunge cutting on plywood panels because the saw blade can be installed upside down.

< Cutting on the floor in two-by-four construction >

(4) New swing cutting action (patent pending) Two cutting systems, smooth "straight cutting" and efficient "swing cutting", can be selected with the change lever. The saw blade is made to forcibly bite into the material when the swing roller at the rear of the plunger (reciprocating shaft) moves up and down along the slanted surface of the swing rail in the gear cover. Soft materials such as wood, etc. can be efficiently cut because the reaction during swing cutting is lower than that of

< Plunge cutting on plywood panels >

orbital cutting. The saw blade can be mounted in either facing upward or downward.

< New swing cutting mechanism >

Movement when the saw blade is mounted normally

Swing roller mounted at the rear of the plunger

Movement when the saw blade is mounted upside down

Swing rail

Slanted surface when the saw blade is mounted normally

Slanted surface when the saw blade is mounted upside down

Change lever

--- 3 ---

(5) Dust- and water-resistant triple-sealing construction <patent pending>

The Model CR 13VA has a triple-sealing construction to protect from the large amount of dust generated when cutting construction materials, autoclaved lightweight concrete, etc. and also from waste water when cutting pipes.

Dust-resistant felt ring (with backup ring)

It prevents dust from entering by way of the plunger (reciprocating shaft).

Dust- and water-resistant seal ring (made of heat-resistant rubber)

It prevents dust and waste water from entering by way of the plunger (reciprocating shaft).

Dust- and water-resistant seal sleeve (made of heat-resistant rubber)

It prevents dust and waste water from entering through the clearance of the gear case.

< Triple-sealing construction >

Backup ring contacted with the felt ring

Felt ring

Seal ring

Plunger

Seal sleeve

(6) Sturdy and heat-resistant thanks to the double-molded front cover (rubber and plastic) <patent pending>

Front covers made of rubber have been generally used for saber saws. However, such front covers are not so durable and there is increasing demand for a sturdier saber saw. To cope with this demand, the Model CR 13VA is equipped with a durable double-molded front cover that is composed of a glass-fiber reinforced polycarbonate body and a nonskid rubber grip. In addition, heat resistance is improved by making a clearance between the front cover and the gear case to flow cooling air for the motor.

--- 4 ---

4-2. Descriptions of patent pending

No. OverseasJapan

Patent

Blade holder of saber saw

Cutting mechanism of saber saw

Front cover of saber saw

Plunger holder of saber saw

Base of saber saw

Portable electric saw

A detachable mechanism that enables one-hand mounting and removal of saw blades without the use of a wrench or other tools (competitors' products require two-hand operation)

A swing cutting mechanism in which the saw blade can be mounted in whichever direction, upward or downward (In competitors' products and our current products, orbital cutting is not available when the saw blade is mounted in reverse.)

A durable and heat-resistant front cover of double-molded construction (rubber and plastic) (In competitors' products and our current products, a front cover made of rubber is used and is not as durable.)

A dust- and water-resistant triple-sealing construction. Sealing quality is not reduced even if the plunger swings. (In competitors' products and our current products, a doublesealing construction is generally used.)

A base with an added shock-absorbing spring

The entire design of the Model CR 13VA (design right) (The design is the first of its type including the new front cover design.)

Descriptions

Saw blade for electric saw

A curved saber saw blade that can cut stainless materials It is under development with a saw blade manufacturer in Japan.

--- 5 ---

5. SPECIFICATIONS

5-1. Specifications

Capacities

Max. cutting size Steel pipe outer diameter 130 mm (5")

Wood thickness (for Europe) 300 mm Mild steel plate 19 mm (3/4")

Power source AC single phase 50 or 60 Hz Type of motor

Enclosure

AC single phase series commutator motor

Housing and handle

•••••••••••••••

Grip handle and front cover Gear cover and inner cover

Type of switch Full load current

Power input

Variable trigger switch

110 V 120 V 127 V 230 V

•••••••••••••••••••••••••

1,050 W

10 A

9.2 A

8.7 A

4.8 A

1,250 W (for USA)

Max. output (reference)

1,180 W 1,070 W (for USA)

Number of strokes

No load Full load

•••••••••••••••••••

••••••••••••••••••

0 to 2,800/min. 2,050/min. [dial setting 5]

1,750/min. (for USA) [dial setting 5]

(for USA) 5"

Glassfiber reinforced polyamide resin

••••

Glassfiber reinforced polycarbonate

resin + Leostmer

••••

Aluminum alloy die casting

Stroke Weight

Packaging

Cord length

Standard accessories

32 mm (1-1/4")

•••••••••••••••••••

Net Gross

•••••••••••••••

4.0 kg (8.8 lbs.) [without cord]

7.0 kg (15.43 lbs.)

Plastic case (in corrugated cardboard sleeve)

2.5 m (8.2 ft)

Blade No. 103 * Plastic case

•••••••••••••••

••••••••••••••••••••

1 1

*: This blade is sold separately as an optional accessory in some areas.

--- 6 ---

5-2. Optional Accessories

The cutting speed of the Model CR 13VA is substantially higher than that of the current model, however, the conventional HCS blades may be broken in heavy applications such as house demolition, etc. To cope with this problem, the BI-METAL blades shown in Table 2 are provided. The BI-METAL blades are tough and rarely break since they are made by electron-beam welding together of two different types of steels. A very hard steel called "DM05" (JIS: SKH51 or equivalent molybdenum containing high speed tool steel) or "Matrix II" (JIS: SKH59 or equivalent cobalt containing high speed tool steel) is used at the cutting edges, and a flexible steel for spring material is used for the blade main body . So these BI-METAL blades are remarkably stronger than the HCS blades.

(1) HCS blades The blade numbers of HCS blades in Table 1 are engraved in the vicinity of the mounting position of each blade. Select appropriate blades by referring to Tables 1 and 3 below. Table 1: HCS blades

Blade No. Uses Thickness (mm)

No. 1 No. 2 No. 3 No. 4 No. 5

No. 8

No. 9

No. 95

No. 96

For cutting steel pipes less than 105 mm in outer diameter 2.5 --- 6 For cutting steel pipes less than 30 mm in outer diameter For cutting steel pipes less than 30 mm in outer diameter For cutting and roughing lumber For cutting and roughing lumber

For cutting vinyl chloride pipes less than 105 mm in outer diameter

For cutting and roughing lumber For cutting steel pipes less than 130 mm in outer diameter

For cutting steel and stainless pipes less than 105 mm in outer diameter

For cutting steel and stainless pipes less than 30 mm in outer diameter

2.5 --- 6

Below 3.5

50 --- 70

Below 30

2.5 --- 15

Below 105

2.5 --- 6

Below 2.5

--- 7 ---

(2) BI-METAL blades The blade numbers of BI-METAL blades in Table 2 are engraved in the vicinity of the mounting position of each blade. Select appropriate blades by referring to Table 2 and 3 below. Table 2: BI-METAL blades

Blade No. Uses

No. 101

No. 102

No. 103

No. 104

No. 105

No. 106

No. 107

No. 108

No. 121 No. 131 No. 132

For cutting steel and stainless pipes less than 60 mm in outer diameter

For cutting steel and stainless pipes less than 130 mm in outer diameter

For cutting steel and stainless pipes less than 60 mm in outer diameter

For cutting steel and stainless pipes less than 130 mm in outer diameter

For cutting steel and stainless pipes less than 60 mm in outer diameter

For cutting steel and stainless pipes less than 130 mm in outer diameter

For cutting steel and stainless pipes less than 60 mm in outer diameter

For cutting steel and stainless pipes less than 130 mm in outer diameter

For cutting and roughing lumber All purpose All purpose

Thickness (mm)

2.5 --- 6

Below 3.5

300

(3) Selection of blades for other materials Table 3

Material to be cut

Iron plate

Nonferrous metal

Synthetic resin

Material quality

Mild steel plate

Aluminum Copper Brass

Phenol resin Melamine resin etc.

Vinyl chloride Acrylic resin etc.

Thickness (mm)

2.5 --- 19

Below 3.5

5 --- 20

Below 5 10 --- 50

5 --- 30

10 --- 60

5 -- - 30

Blade No.

No. 1, 2, 101, 102, 103, 104, 105, 106, 131, 132

No. 3, 6, 107, 108 No. 1, 2, 101, 102, 103, 104,

105, 106, 131, 132 No. 3, 6, 107, 108 No. 1, 2, 4, 101, 102, 103, 104,

131, 132 No. 3, 5, 8, 105, 106, 107, 108 No. 1, 2, 4, 101, 102, 103, 104,

131, 132 No. 3, 5, 8, 105, 106, 107, 108

--- 8 ---

6. COMPARISONS WITH SIMILAR PRODUCTS

6-1. For USA Market

Maker HITACHI Model CR 13VA

1. Voltage V

2. Rated current

3. Stroke

4. No-load speed

5. Max. output

6. Dimensions

7. Net weight

8. Vibr ation

9. No-load noise

10. Features

Variable speed Blade tool-less Base tool-less Front cover

Cutting action

Counter balance

L H

A inch /min. W

inch

lbs. dB dB

120

11.0 1-1/4 0 -- 2,800 1,070

18.1

6.5

4.1

8.8

126.0

91.0 *T&D

Plastic & Rubber

(Swing)

CR 10V 115

6.5 1 700 -- 2,200 680

16.4

5.5

3.7

7.9

118.3

81.5

Rubber

(Orbital)

P E S 120

10.0 10.0 10.0 1-1/8 0 -- 2,600 920

18.0

7.3

4.2

9.0

126.0

90.8 T

Rubber

(Orbital)

1-1/4 0 -- 3,200 (900)

17.6

6.9

3.6

8.8

115.5

89.3 T&D

Rubber

1-1/4 0 -- 2,900

--- --- ---

17.5

6.7

3.7

8.4

121.5

87.2 T&D

Rubber

6-2. For European Market

Maker HITACHI Model CR 13VA

1. Voltage V

2. Power input

3. Stroke

4. No-load speed

5. Max. output

6. Dimensions

7. Net weight

8. Vibr ation

9. No-load noise

10. Features

Variable speed Blade tool-less Base tool-less Front cover

Cutting action

Counter balance

L H

W mm /min. W

kg dB dB

230 1,050 32 0 -- 2,800 1,180 462 165 106

4.0

126.0

91.0 *T&D

Plastic & Rubber

(Swing)

CR 10V

720 26 700 -- 2,200 680 417 140 94

3.6

118.3

81.5 D

Rubber

(Orbital)

R Y B 230

1,050 1,000 1,100 28 0 -- 2,600 920 458 185 107

4.0

126.0

90.8 T

Rubber

(Orbital) (Orbital)

32 0 -- 2,800

------ 446 175 92

3.9

115.5

89.3 T&D

Rubber

32 0 -- 2,700

------ 499 175 98

4.4

124.0

93.5 T&D

Rubber

*T: Variable speed control with trigger D: Variable speed control with dial

--- 9 ---

7. COMPARISONS IN CUTTING TIME

The following test data should be used for reference purposes only since the cutting time may vary depending on the operating conditions such as the cutting function, pressing force, type of blade, etc. The graph shows the time (in sec.) required to cut a piece of each material.

7-1. Cutting Steel Pipes

A steel pipe less than 42 mm (1.65") in inner diameter and

3.2 mm (0.13") in thickness

HITACHI genuine blade No. 103 for cutting steel pipes

Pressing force about 4 kgf (8.8 lbs.)

CR 13VA

CR 10V

A B

C D

Straight cutting

Swing or orbital cutting

Swing cutting

Orbital cutting

Orbital cutting function is not provided.

Orbital cutting

Orbital cutting function is not provided.

Orbital cutting

20 30 40 50

Cutting time (sec./cut)

--- 10 ---

+ 25 hidden pages