Hitachi C 9SA2, C 9BA2 Technical And Service Manual
TECHNICAL DATA
AND
SERVICE MANUAL
CIRCULAR SAWS
C 9SA2
C 9BA2
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
LIST Nos. C 9SA2: E516
C 9BA2: E517
Nov. 2006
C
MODELS
C 9SA2
C 9BA2
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:
Symbol Utilized
Competitor
Company Name
Model Name
B BOSCH
GKS85S
C MAKITA
5900B
C 9SA2, C 9BA2
Page
CONTENTS
1. PRODUCT NAME ...........................................................................................................................1
2. MARKETING OBJECTIVE ............................................................................................................. 1
3. APPLICATIONS ..............................................................................................................................1
4. SELLING POINTS ..........................................................................................................................2
4-1. Selling Point Descriptions .............................................................................................................. 3
5. SPECIFICATIONS ..........................................................................................................................5
6. COMPARISONS WITH SIMILAR PRODUCTS ..............................................................................6
7. PRECAUTIONS IN SALES PROMOTION .....................................................................................7
7-1. Handling Instructions ..................................................................................................................... 7
7-2. Caution on Name Plate .................................................................................................................. 7
8. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY ............................................................8
8-1. Disassembly .................................................................................................................................. 8
8-2. Reassembly ................................................................................................................................... 9
8-3. Insulation Tests ............................................................................................................................ 12
8-4. Cleaning the Cover ...................................................................................................................... 12
9. STANDARD REPAIR TIME (UNIT) SCHEDULES ....................................................................... 13
Assembly Diagram for C 9SA2
Assembly Diagram for C 9BA2
--- 1 ---
1. PRODUCT NAME
Hitachi Circular Saws, Models C 9SA2/C 9BA2 [235 mm (9-1/4")]
2. MARKETING OBJECTIVE
Fifteen years have passed since the sales start of the Model C 9. Although this model has been well reputed in
the market thanks to the ease of operation, compact and lightweight body until now, it is upgraded to the new
Models C 9SA2 and C 9BA2. With these new models, we aim to expand our market share. The key features of
the new models are as follows:
(1) Compact and lightweight
(2) Unique design
(3) Low noise and vibration
(4) Electric brake (Model C 9BA2 only)
(5) PTFE coating base for smooth sliding of workpieces (Model C 9BA2 only)
3. APPLICATIONS
Cutting of various wood materials
--- 2 ---
4. SELLING POINTS
Large knob for easy
cutting depth adjustment
Low noise and vibration
(Noise level during no-load operation:
3 dB lower than the conventional
model)
Main handle
Blower function to
blow out cutting dust
on the ink line
Precise and heavy-duty
aluminum die-cast base
and lower guard
Comfortable and nonskid
soft-touch handle
Main handle
Adjustable steel guide piece
Powerful motor
Unique design
Electric brake
(Model C 9BA2 only)
Most lightweight in the class
thanks to the gear cover made
of die-cast magnesium alloy
PTFE coating base for
smooth sliding of workpieces
(Model C 9BA2 only)
Compact and lightweight
(Weight: 6.8 kg)
--- 3 ---
4-1. Selling Point Descriptions
(1) Compact and lightweight
Catalog
weight
Maker
Model
* Measured
weight
kg
kg
HITACHI
C 9SA2
B
HITACHI
C 9BA2
C
6.8
6.8
6.9
7.3
6.8
6.8
7.0
7.0
The Models C 9SA2 and C 9BA2 are most lightweight in each category as shown in Table 1.
(2) Unique design
Ease of operation is sufficiently considered in designing the Models C 9SA2 and C 9BA2 including the handle
location and shape. These models are uniquely designed through the richly used elastomer. The elastomer
used at the handle makes each model easier to operate.
(3) Low noise and vibration
In the Models C 9SA2 and C 9BA2, the ball bearings at the front and the back of the motor are supported by
rubber parts and a highly efficient, low-noise and small-diameter fan is adopted. The noise level and the
vibration level at start-up and no-load operation are reduced thanks to the above.
(4) Electric brake (Model C 9BA2 only)
The Model C 9BA2 is equipped with the electric brake function that is well-reputed in the conventional model.
The rotation of the motor is braked upon turning off the switch and stopped in a shorter time than the case of a
circular saw without braking function. Thus the Model C 9BA2 can quickly start the next work.
(5) PTFE coating base for smooth sliding of workpieces (Model C 9BA2 only)
When the operator pushes the circular saw forward during cutting, the pushing force is partially compensated
by friction with the workpiece. The PTFE coating base can reduce such a compensated force because the
frictional resistance is low. As a result, workpieces can be cut smoothly.
(6) Powerful motor
Table 2. Comparison of power input/measured weight ratio when using 9" dia. saw blade
Table 1. 9" circular saw weight comparisons (* Measured weight excludes cord, guide and saw blade)
Power
input
* Measured
weight
W
kg
HITACHI
C 9SA2
B
HITACHI
C 9BA2
C
2000
6.8
1700
7.3
2000
6.8
2000
7.0
Input/
weight
W/kg
299 233 299 286
The Models C 9SA2 and C 9BA2 are superior to competitors concerning power input values in each category
as shown in Table 2. The power input/measured weight ratio obtained by dividing the power input by the
measured weight is also superior to competitors. The Models C 9SA2 and C 9BA2 are well-balanced circular
saws.
Maker
Model
--- 4 ---
(7) Comfortable and nonskid soft-touch handle
The handle is entirely covered with elastomer. The main handle and the sub handle are nonskid and fit in
hands for comfortable cutting operation.
(8) Adjustable steel guide piece
If the center of the saw blade is deviated from the notch of the guide piece due to continuous operation or
replacement of the saw blade, the position of the guide piece can be adjusted finely for more accurate cutting
operation. It is also convenient for cutting with respect to either side of the blade. The guide piece is made of
steel for higher strength.
(9) Blower function to blow out cutting dust on the ink line
The conventional models discharge almost all the cooling air forward as a blower function. However,
discharge of cooling air increases the operating noise. To cope with this, the Models C 9SA2 and C 9BA2 are
equipped with the improved cooling air path to reduce the operating noise while maintaining the blower
function.
(10) Precise and heavy-duty aluminum die-cast base and lower guard
The base and the lower guard are made of heavy-duty aluminum die-cast material. The Models C 9SA2 and
C 9BA2 can accurately cut workpieces for a long time because the base and the lower guard are highly
durable and resistant to warping.
(11) Large knob for easy cutting depth adjustment
The large knob is easy to adjust cutting depth speedily and reliably.
(12) Gear cover made of die-cast magnesium alloy
The Models C 9SA2 and C 9BA2 are most lightweight in the class thanks to the gear cover made of die-cast
magnesium alloy.
--- 5 ---
* Be sure to check the name plate on product as it is subject to change by areas.
** Measured weight excludes cord, guide and saw blade.
Housing
Handle cover
Gear cover
Saw cover
Lower guard
Base
Polycarbonate resin, elastomer
Polycarbonate resin, elastomer
Die-cast magnesium alloy
Polycarbonate resin, elastomer
Die-cast aluminum alloy
Die-cast aluminum alloy
Standard accessories
Tungsten carbide tipped (TCT) saw blade
••••••••••••••••••••••••••••••••••••••••••••
1
Hex. bar wrench ....................................................................................... 1
Guide .........................................................................................................1
Wing bolt .................................................................................................... 1
Type of motor
Enclosure
Weight
AC single phase
Cutting depth
at 90û
Power source
* Power input
at 45û
Voltage (V)
* Current (A)
Rotation speed
Cord
No-load
Gross (with case)
** Net
Full-load
Type
Overall length
1,570 W
2,600 min
-1
2.5 m (8.2 ft.)
5. SPECIFICATIONS
235 mm (9-1/4")
Two-core cabtire cable
Model
Saw blade diameter
C 9SA2
0 to 86 mm (0 to 3-3/8")
AC single phase commutator motor
Packing Corrugated cardboard box/Plastic case and corrugated cardboard sleeve
Max. 65 mm (2-9/16")
Type of switch Trigger switch
6.8 kg (15.0 lbs)
11.5 kg (25.4 lbs)
110
15
5,000 min
-1
3,200 min
-1
C 9BA2
Gross
9.0 kg (19.8 lbs)
Long guide .................................................................................................1
Dust collector ............................................................................................ 1
Lever (Short type) ......................................................................................1
Optional accessories
220
9.6
2,000 W
230
9.2
2,000 W
240
8.8
2,000 W
3,360 min
-1
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