Hitachi CJ 90VST User manual

PRODUCT NAME

Hitachi Jig Saw

Model 90 mm (3-1/2”) CJ 90VST

●Cutting or cutting out shapes in various types of wood workpieces

●Cutting various types of metals such as mild steel, aluminum and copper

●Cutting various types of synthetic resin materials such as bakelite and vinyl chloride

●Cutting various decorative sheets and thin, soft construction materials

●Cutting stainless steel sheets

LIST No. E525

Jun. 2010

The new power jig saw Model CJ 90VST is made less expensive than existing jig saw Model CJ 110MV

by limiting its functions.

(1) Fastest cutting speed among jig saws using a high-power motor

(2) Blade holder of the quick-fit chuck type with stronger blade-holding force

(3) 4-stage orbital action

With the features above, the new jig saw will be released in order to increase its market share and sales.

MARKETING OBJECTIVE

APPLICATIONS

SELLING POINTS

　International Sales Division

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

[ NEW FEATURES ]

Fastest cutting speed among jig saws using

a high-power motor

Tool-less blade changing system

[ SAME FEATURES AS THE CONVENTIONAL MODELS ]

4-stage orbital action

Soft grip handle

Blower mechanism for blowing away cutting dust

REMARK:

●For more information about HANDLING INSTRUCTIONS, visit our website at:

http://www.hitachi-koki.com/manual_view_export/

●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:

Competitors

Symbols Utilized

Company Name Model Name

B BOSCH GST75BE

C RYOBI EJS-600QEO

D RYOBI JS550LK

CONTENTS

Page

SELLING POINTS --------------------------------------------------------------------------------------------------------------1

SPECIFICATIONS --------------------------------------------------------------------------------------------------------------3

1. Specifications -----------------------------------------------------------------------------------------------------3

2. Optional Accessories -------------------------------------------------------------------------------------------4

COMPARISON WITH SIMILAR PRODUCTS----------------------------------------------------------------------------5

1. Comparison of Specifications ---------------------------------------------------------------------------------5

ORBITAL MECHANISM AND BLADE ------------------------------------------------------------------------------------6

1. Blade Movement -------------------------------------------------------------------------------------------------6

2. Orbital Position Selection --------------------------------------------------------------------------------------6

3. Blades --------------------------------------------------------------------------------------------------------------7

PRECAUTIONS ON SALES PROMOTION -----------------------------------------------------------------------------8

1. Safety Instructions ----------------------------------------------------------------------------------------------8

REPAIR GUIDE -----------------------------------------------------------------------------------------------------------------9

1. Precautions on Disassembly and Reassembly ----------------------------------------------------------9

STANDARD REPAIR TIME (UNIT) SCHEDULES -------------------------------------------------------------------16

Assembly Diagram for CJ 90VST

-1-

Fastest cutting speed among jig saws using a high-power motor

Comparison of power input

Model

Item CJ 90VST (Reference)

CJ 110MV BCD

Power input 705 W

(*630 W) 720 W 650 W 600 W (630 W)

* 120V and 127V model

Comparison of cutting speed (The cutting speed greatly depends on cutting conditions.)

●Material: Wood (24 mm thick), Blade: No.41, Orbital position: III, Thrust power: 1.5 (kg)

Cutting speed (cm/min)

Maker Model 0 50 100 150 200

CJ 90VST 187

HITACHI CJ 110MV 231

B117

C68

D165

●Material: Wood (49 mm thick), Blade: No.41, Orbital position: III, Thrust power: 2.0 (kg)

Cutting speed (cm/min)

Maker Model 0 25 50 75 100

CJ 90VST 67

HITACHI CJ 110MV 85

B65

C16

D55

●Material: Mild steel (2 mm thick), Blade: No.16, Orbital position: 0, Thrust power: 2.0 (kg)

Cutting speed (cm/min)

Maker Model 010 20 30 40 50

CJ 90VST 44

HITACHI CJ 110MV 39

B40

C22

D39

●Material: Stainless steel (3 mm thick), Blade: No.95,Orbital position: 0, Thrust power: 2.0 (kg)

Cutting speed (cm/min)

Maker Model 02 4 6 8 10

CJ 90VST 3.5

HITACHI CJ 110MV 5.2

B10

C3.2

D4.9

SELLING POINTS

-2-

Tool-less blade changing system

The blade is easily replaceable because it can be attached

and detached without using such tools as a spanner and

wrench.

The blade can be attached and detached by simply pulling

the lever. Pulling the lever pushes back the holder pin (via a

built-in spring) that holds the blade in place. This allows the

blade to be easily attached and detached.

The only usable competitive blade is BOSCH's blade having

an attaching portion up to 1.7 mm thick or an equivalent

blade of the same shape.

4-stage orbital action

The Model CJ 90VST is equipped with an orbital mechanism that allows the blade to move up and down,

and back and forward. This mechanism allows the blade to cut deeply into wood and other soft materials,

and also discharges cutting chips well to achieve speedy cutting. For details, see “Blade movement” on

page 6.

Soft grip handle

The handle of the Model CJ 90VST is completely covered with soft-touch elastomer (a rubber-like soft

resin). It is slip resistant and securely fits in into palm of even a sweaty hand.

Blower mechanism for blowing away cutting dust

The Model CJ 90VST is equipped with a dust blower mechanism that blows off cutting dust into the air from

the motor cooling fan.

Refer to the Technical Data and Service Manual of the current Model CJ 110MV for the following:

CJ 110MV / List No. E511

-3-

1. Specifications

Model

Item CJ 90VST

Wood 90 mm (3-1/2")

Capacity Max. cutting size

Mild Steel 8 mm (5/16”)

No-load speed 850 to 3,000 min-1

Type of power source Single-phase AC 50/60 Hz

Voltage and current 110 V 120 V 127 V 220 V 230 V 240 V

6.7 A 5.5 A 5.2 A 3.3 A 3.2 A 3.0 A

Power input 705 W (120 V, 127 V model: 630 W)

Length of stroke 20 mm (3/4")

Min. cutting radius 25 mm (1")

Max. cutting radius 45° (right and left)

Type of motor Single-phase AC commutator motor

Insulation method Double insulation

Type of switch Trigger switch

Enclosure

Housing ------------ Glass fiber reinforced nylon resin (black)

and thermoplastic elastomer (green)

Side cover --------- Aluminum alloy die casting (painted silver)

Base ---------------- Aluminum alloy die casting (Ni-plated)

Net 2.2 kg (4.9 lbs) (without cord)

Weight Gross 3.5 kg (7.7 lbs) (with plastic case)

Overall length, overall height

and overall length

228 mm x 202 mm x 66 mm

(8-63/64” x 7-61/64” x 2-41/64”)

Length of cord 2.5 m (8.2 ft.)

Standard accessories

●Blade for wood (No. 41) ------------------------------------------1

●3 mm hex. bar wrench --------------------------------------------1

●Carrying Case -------------------------------------------------------1

SPECIFICATIONS

-4-

2. Optional Accessories

(1) Blades

Blade shape Application

Blade No.

Pitch Code No.

Per pkg.

Wood No.1

(Super) 6 321878 3

No.11 8 879336 5

Wood, pulp,

synthetic resin No.12 20 879337 5

No.15 8 879338 5

Steel pulp,

nonferrous metal,

synthetic resin No.16 25 879339 5

No.21 6 879340 5

Wood, pulp,

synthetic resin No.22 10 879341 5

Stainless steel No.97 21 963400 5

NOTE: Standard blade No. 41 and optional blade No. 21 have the same shape.

(2) Guide

Code No.

321593

(3) Sub base (A) (steel)

Code No.

321992

(4) Sub base (B) (resin)

Code No.

321993

(5) Dust collector

Code No.

321591

-5-

1. Comparison of Specifications (Superior specifications: )

Maker

Model

Item

HITACHI

CJ 90VST

(Reference)

CJ 110MV B C D

Wood 90 mm

(3-1/2”)

110 mm

(4-5/16”)

90 mm

(3-1/2”)

75 mm

(3”)

75 mm

(3”)

Cutting

capacity Mild

steel

8 mm

(5/16”)

10 mm

(3/8”)

10 mm

(3/8”)

8 mm

(5/16”) Not available

Length of stroke 20 mm

(3/4”)

26 mm

(1”)

2 3 mm

(29/32”)

20 mm

(3/4”)

25 mm

(1”)

Power input

( ): for 120V and 127V model

705 W

(630 W) 720 W 650 W 600 W (630 W)

No-load

speed

min-1

(/min) 850 to 3,000 850 to 3,100 500 to 3,100 0 to 2,600 0 to 3,200

Orbital action Provided Provided Provided Provided Provided

Tool-less

blade attachment Provided Provided Provided Provided Provided

Soft grip handle Provided Provided Provided Provided Provided

Material of base Aluminum Aluminum Steel plate Aluminum

+ Resin plate

Aluminum

+ Steel plate

Length (A) 228 mm

(8-63/64”)

246 mm

(9-41/64”)

232 mm

(9-9/64”)

225 mm

(8-55/64”)

238 mm

(9-3/8”)

Height (B) 202 mm

(7-61/64”)

206 mm

(8-7/64” )

204 mm

(8-1/32”)

219 mm

(8-5/8”)

202 mm

(7-61/64”)

Dimension

Width (C) 66 mm

(2-41/64”)

68 mm

(2-11/16”)

80 mm

(3-5/32”)

70 mm

(2-3/4”)

80 mm

(3-5/32”)

Weight

(excluding cord)

2.2 kg

(4.9 lbs)

2.2kg

(4.9 lbs)

2.3 kg

(5.1 lbs)

2.2 kg

(4.9 lbs)

2.7 kg

(6.0 lbs)

No-load noise level 84.5 dB 86 dB 84 dB 87 dB 87 dB

COMPARISON WITH SIMILAR PRODUCTS

-6-

III II

2.0 mm (5/64”)

1.2 mm

(3/64”)

0.6 mm (1/32”)

20 mm (3/4”)

1. Blade Movement

In the Model CJ 90VST, the orbital mechanism moves the blade up and down, and back and forward. The

amount of fore-and-aft blade movement can be adjusted by simply switching the change knob to any of the

four settings. The table below shows the modeled orbits of blade movement at each orbital position

(change knob position).

III II I 0

Orbital positionBlade edge movement

Perpendicular

movement only

2. Orbital Position Selection

Selecting the most appropriate orbital position for each cutting job is essential to achieve the best possible

cutting efficiency. However, as the best orbital position depends on workpiece hardness and thickness, the

desired finish of the cut surface, and other factors, setting a single, simple standard for selecting the best

orbital position is not practical. Table 1 below can be used as a general guide for the appropriate selection

of orbital position based on various factors.

Table 1 General guide for appropriate selection of orbital position

Orbital position

Factor

III II I 0

Material hardness Soft material Hard material

Material thickness Thick Thin

Cutting speed Faster cutting Slower cutting

Straight cutting or

curved cutting Straight cutting Curved cutting

Surface finish Rough finish acceptable

(splintering, chipping acceptable) Fine finish

Material stability Unstable Very stable

* Set the orbital position to "0" independently of the cutting speed when cutting a small arc or curved line by

using a guide (sold separately).

ORBITAL MECHANISM AND BLADE

-7-

3. Blades

Proper blade selection is very important for achieving maximum performance of the Model CJ 90VST. The

table below can be used as a handy reference for selecting the optimum blade based on the type and

thickness of material to be cut.

No.1

(Long)

No. 1

(Super Long)

No. 11 No. 12,

42 No. 15 No. 16,

46 No. 21 No. 22 No. 41 No. 97 123X

Material

to be cut

Blade

Material quality Thickness of material (mm)

General lumber

Below

10 to 55

Below

10 to 55 5 to 40 10 to 65

Lumber

Plywood

5 to 30

Below

5 to 30 3 to 20

Mild steel plate

3 to 6

Below

2 to 5 1.5 to 8

Iron

plate

Stainless steel　plate

1.5 to 2.5

Aluminum copper,

brass

3 to 12

Below

Nonferrous

metal

Aluminum sash

Height

up to

Height

up to

Height

up to

Phenol resin,

melamin resin, etc.

5 to 20

Below

5 to 15

Below

5 to 15

Vinyl chloride,

acryl resin, etc.

5 to 30

Below

5 to 20

Below

5 to 30 3 to 20 5 to 15

Plastics

Foamed

polyethylene,

foamed styrol

10 to 55 3 to 25 5 to 25

3 to 25

10 to 55 3 to 40 5 to 25

Card board,

corrugated paper

10 to 55 3 to 25 10 to 55 3 to 40

Hardboard

3 to 25

Below

3 to 25

Pulp

Fiberboard

Below

NOTE: The minimum cutting radius of the No. 1 (Long), No. 1 (Super long), No. 21, No. 22, and No.

41 blades is 100 mm.

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