Hitachi C 12LDH, C 12FDH Technical Data And Service Manual
TECHNICAL DATA
AND
SERVICE MANUAL
COMPOUND MITER SAW
C 12LDH
C 12FDH
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
LIST Nos. C 12LDH: E943
C 12FDH: E944
Oct. 2005
C
MODELS
C 12LDH
C 12FDH
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
4212L
P DEWALT
DW716
Q DELTA
36-412
Page
CONTENTS
1. PRODUCT NAME............................................................................................................................ 1
2. MARKETING OBJECTIVE .............................................................................................................. 1
3. APPLICA TIONS............................................................................................................................... 1
4. SELLING POINTS ........................................................................................................................... 1
4-1. Selling Point Descriptions ................................................................................................................ 2
5. SPECIFICATIONS ........................................................................................................................... 4
6. COMPARISONS WITH SIMILAR PRODUCTS............................................................................... 6
7. PRECAUTIONS IN SALES PROMOTION ...................................................................................... 7
7-1. Instruction Manual ............................................................................................................................7
7-2. Warning Labels and Caution Labels.................................................................................................7
7-3. Relative Standards ...........................................................................................................................9
7-4. Laser Marker.....................................................................................................................................9
7-5. Ambient Illuminance and Visibility of Laser Line .............................................................................10
8. ADJUSTMENT AND OPERATION PRECAUTIONS...................................................................... 11
8-1. Position Adjustment of Laser Line ..................................................................................................11
8-2. Before Cutting.................................................................................................................................13
8-3. How to Use the Vise Assembly.......................................................................................................14
8-4. Confirmation for Use of Sub Fence ................................................................................................15
8-5. Cutting Operation............................................................................................................................17
8-6. Digital Display Panel (For Model C 12LDH) ...................................................................................22
9. ADJUSTMENT OF COMPONENTS.............................................................................................. 23
9-1. Bevel Angle Fine Adjustment ..........................................................................................................23
10. PACKING ..................................................................................................................................... 24
11. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY.......................................................... 25
11-1. Precautions in Disassembly and Reassembly of the Laser Marker ..............................................25
11-2. Disassembly ..................................................................................................................................25
11-3. Reassembly ..................................................................................................................................35
11-4. Wiring Diagram .............................................................................................................................36
11-5. No-load Current.............................................................................................................................40
11-6. Reassembly Requiring Adjustment ...............................................................................................40
11-7. Lubrication......................................................................................................................................41
11-8. Product Precision ...........................................................................................................................41
11-9. Adjustment of Laser Marker Accuracy ...........................................................................................42
11-10. Tightening Torque.........................................................................................................................45
12. REPAIR GUIDE ............................................................................................................................ 46
13. STANDARD REPAIR TIME (UNIT) SCHEDULES ....................................................................... 51
Assembly Diagram for C 12LDH
Assembly Diagram for C 12FDH
Page
--- 1 ---
1. PRODUCT NAME
Hitachi Compound Miter Saw, Models C 12LDH and C 12FDH
2. MARKETING OBJECTIVE
Following the 12" compound miter saw Model C 12LCH equipped with the laser marker, we introduce the new two
12" compound miter saws Models C 12LDH and C 12FDH. The Model C 12LDH is equipped with the class-first
digital display panel that indicates miter/bevel angles. In addition, the Models C 12LDH and C 12FDH can
perform bevel cutting at 45˚ in either left or right direction efficiently without moving the workpiece. With the new
Models C 12LDH and C 12FDH, we aim to expand our market share.
3. APPLICA TIONS
Cutting various types of wood workpieces
Cutting workpieces of plywood, decoration panels, soft fiberboard and hard board
Cutting aluminum sashes
4. SELLING POINTS
Dust guide to prevent
chips from scattering
Aggressive tool design
Thumb actuated positive
stops for quick and easy
miter adjustment
Powerful 15 amps motor
Soft vibration
reducing grip
(9)
(10)
(8)
(5)
(7)
Laser guide system
For easier alignment
with the ink line
(2)
Digital display panel that
indicates miter/bevel angles
(Model C 12LDH)
(1)
Bevel angle fine adjustment
(4)
130-mm high fence
(Turning sub fence)
(6)
(For U.S.A. and Canada)
Bevel cutting in either
left or right direction
(3)
Left bevel cutting:
H50 x W203 (mm)
H55 x W190 (mm)
Right bevel cutting:
H31 x W203 (mm)
H38 x W190 (mm)
--- 2 ---
(2) Laser guide system
Use the laser marker for aligning with the ink line on the workpiece.
Cutting position can be properly adjusted by aligning the positioning ink line with the laser line. There is no
need to make a long ink line on the workpiece.
There is no need to lower the motor head to align with the ink line because the laser marker makes a laser
line on the workpiece. In addition, cutting position can be easily adjusted because the operator can hold the
workpiece with both hands to move.
Cutting position can be easily adjusted because the laser line can be aligned with an optionally angled ink
line.
Even the workpieces such as crown moldings and base boards that have decorative surfaces and are
difficult to be made an ink line can be cut just by aligning the laser line with the ink line on the fence side.
The laser line is adjusted to the width of the saw blade at the time of factory shipment. Depending upon the
user's cutting choice, the laser line can be aligned with the left side of the cutting width (saw blade) or the
ink line on the right side. Adjust the position of the laser line according to "8-1. Position Adjustment of Laser
Line" on page 11.
4-1. Selling Point Descriptions
(1) Digital display panel that indicates miter/bevel angles (Model C 12LDH)
1
2
3
4
Fig. 1
Laser line
Ink line
Use the digital display panel when cutting a workpiece at an
optional angle. The class-first digital display panel indicates a
miter/bevel cutting angle with a numeric value. There is no
reading error caused by visual check between the indicator and
the scale. The digital display indicates a miter angle or a bevel
angle in increments of 0.5˚. The digital display is equipped with
the convenient back light ON/OFF switch that makes the display
easily readable even in a dimly lit place.
Fig. 2
(3) Bevel cutting in either left or right direction
Maximum cutting dimensions
The Models C 12LDH and C 12 FDH
can perform bevel cutting for the
workpieces shown in Table 1 by
inclining the saw blade section in
either left or right direction.
1
Bevel left 45˚
Height x Width
Table 1
Bevel right 45˚
Height x Width
Hitachi
C 12LDH
Maximum
cutting
dimensions
Maker
•
Model
50 x 203
[55 x 190]
31 x 203
[38 x 190]
Workpiece
Bevel left 45˚
Bevel right 45˚
Width
Height
--- 3 ---
(4) Bevel angle fine adjustment
The Models C 12LDH and C 12FDH are easily and finely adjustable to an optional bevel angle. Pulling the
plate allows the bevel angle to be adjusted by about 48˚ to the left or about 48˚ to the right with one-touch
simple operation.
(5) Soft, vibration reducing grip
The handle grip is comfortable and slip-resistant thanks to the integrally molded rubber. In addition, it reduces
vibration transmitted to the operator's hand. The Models C 12LDH and C 12FDH are easier to operate.
(6) 130-mm high fence (Turning sub fence)
The Models C 12LDH and C 12FDH realize stable cutting thanks to the widely supportable high fence.
(7) Aggressive tool design
The tool color is gunmetallic silver to give a sturdier image. The circular saw portion is of a powerful, original
and aggressive design.
(8) Powerful 15 amps motor
The Models C 12LDH and C 12FDH are equipped with a 15-ampere motor. The Models C 12LDH and
C 12FDH can cut workpieces as quickly as the Model C 12LCH.
(9) Thumb actuated positive stops for quick and easy miter adjustment
The positive stops are provided to adjust the turn table position for miter cutting securely. These stops can be
actuated (fixed or released) with thumb quickly and easily holding the side handle.
(10) Dust guide to prevent chips from scattering
A dust guide is provided to prevent wood chips from adhering to the saw blade and scattering when cutting the
edge of the workpiece.
--- 4 ---
5. SPECIFICATIONS
70 mm (2-3/4") x 203 mm (8")
89 mm (3-1/2") x 190 mm (7-1/2")
Maximum
cutting
dimensions
Height x
Width
0˚ (Right angle)
Miter cutting ranges Right and left 0˚ --- 52˚
Miter right/left 45˚
70 mm (2-3/4") x 140 mm (5-1/2")
Bevel cutting ranges
Right and left 0˚ --- 48˚
Compound (miter + bevel)
cutting ranges
Miter: Right and left 0˚ --- 45˚, Bevel: Right and left 0˚ --- 45˚
Max. output
Cord
Packaging
C 12LDH
Weight
Main unit dimensions
Width x Depth x Height
1,950 W
Type: 2-conductor cabtire cable
Length: 2.0 m (6.7 ft)
Corrugated cardboard box
21.5 kg (47.4 Ibs.), gross weight 28 kg (61.7 Ibs.)
625 mm x 780 mm x 685 mm (24-5/8" x 30-23/32" x 27")
21.0 kg (46.3 Ibs.), gross weight 27.5 kg (60.6 Ibs.)
Angle stopper positions
Right and left 0˚, 15˚, 22.5˚, 31.6˚, 45˚
Saw blade outer diameter
305 mm (12") external dia.
No-load rotation speed
4,000 min
-1
Laser marker
Full-load current
Miter right/left 52˚
70 mm (2-3/4") x 120 mm (4-3/4")
Maximum output
Wave length
Laser medium
< 1 mW (CLASS II )
400 nm --- 700 nm
Laser diode
Type of motor
AC single phase commutator series motor
Power source type and voltage AC single phase 60 Hz, 120 V
15 A
C 12FDH
Coating
Gunmetallic silver
Digital display
(For Models C 12LDH)
Precision 0.5˚
(It is not the actual precision when cutting a wood workpiece.)
Miter right/left 45˚
+
Bevel left 45˚
50 mm (1-31/32") x 140 mm (5-1/2")
Bevel right 45˚
31 mm (1-7/32") x 203 mm (8")
Miter right/left 45˚
+
Bevel right 45˚
31 mm (1-7/32") x 140 mm (5-1/2")
Bevel left 45˚
50 mm (1-31/32") x 203 mm (8")
Standard accessories 305 mm (12") TCT saw blade (32 teeth, Code No. 323522)
•••••••••••••••
for wood cutting
Dust bag
Vise ass'y
17 mm box wrench
4 mm hex. bar wrench
--- 5 ---
305 mm (12") TCT saw blade (60 teeth, Code No. 305546)
Extension holder and stopper (Code No. 323523)
Crown molding vise ass'y (including crown molding stopper (L))
(Code No. 323545)
Crown molding stopper (L) (Code No. 323546)
Crown molding stopper (R) (Code No. 323547)
Optional accessories
--- 6 ---
305 (12") (32 teeth)
15
4,000
1,520
1,950
Provided
< 1 mW
Double insulation
Provided (fixed)
305 (12") (60 teeth)
15
4,000
Provided
Double insulation
None
625 x 690 x 655
(24-5/8" x 27-5/32" x 25-25/32")
305 (12") (60 teeth)
15
4,200
Not provided
Double insulation
None
630 x 670 x 735
(24-13/16" x 26-3/8" x 28-15/16")
63.5 mm x 165 mm
(2-1/2" x 6-1/2")
70 mm x 140 mm
(2-3/4" x 5-1/2")
Miter cutting ranges
Bevel cutting ranges
Compound (miter + bevel)
cutting ranges
Angle stopper position
Saw blade outer diameter (mm)
Full-load current (A)
No-load revolution (min
-1
)
Power input (W)
Max. output (W)
Laser marker
Laser output
Insulation structure
Dust guide
Dust bag size (mm)
Main unit dimensions
Width x Depth x Height
6. COMPARISONS WITH SIMILAR PRODUCTS
Item
Maker/Model
Max.
cutting
dimensions
Height
x Width
HITACHI
C 12LDH/C 12FDH
0˚ (Right angle)
Miter right/left 45˚
P
70 mm x 203 mm
(2-3/4" x 8")
89 mm x 190 mm
(3-1/2" x 7-1/2")
Q
50 mm x 140 mm
(1-31/32" x 5-1/2")
50 mm x 203 mm
(1-31/32" x 8")
Bevel left 45˚
Bevel right 45˚
Motor
48 mm x 201 mm
(1-7/8" x 7-29/32")
30 mm x 201 mm
(1-3/16" x 7-29/32")
Right and left 0˚--- 50˚
Standard accessories
Optional accessories
• 305 mm (12") TCT saw
blade (32 teeth) for
wood cutting
• Dust bag
• Vise ass'y
• 17 mm box wrench
• 4 mm hex. bar wrench
•
305 mm (12") TCT saw
blade (60 teeth) for
normal cutting
•
Extension holder and
stopper
•
Crown molding vise ass'y
(including crown molding
stopper (L))
•
Crown molding stopper (L)
•
Crown molding stopper (R)
74 mm x 201 mm
(2-29/32" x 7-29/32")
89 mm x 188 mm
(3-1/2" x 7-13/32")
Right and left 0˚--- 52˚
Miter: Right and left
0˚ --- 45˚
Bevel: Right and left 0˚ --- 45˚
Right and left 0˚, 10˚,
15˚, 22.5˚, 31.6˚, 45˚
Miter: Right and left
0˚ --- 45˚
Bevel: Right and left 0˚ --- 45˚
• 305 mm (12") saw blade
(60 teeth)
• Dust bag
• Blade wrench
•
Extension kit
•
Length stop
•
Crown stops
•
Material clamp
43 mm x 235 mm
(1-11/16" x 9-1/4")
24 mm x 235 mm
(15/16" x 9-1/4")
Right and left 0˚--- 48˚
63.5 mm x 235 mm
(2-1/2" x 9-1/4")
89 mm x 165 mm
(3-1/2" x 6-1/2")
Right and left 0˚, 15˚,
22.5˚, 31.6˚, 45˚
Miter: Right and left
0˚ --- 48˚
Bevel: Right and left 0˚ --- 45˚
• 305 mm (12") saw blade
(60 teeth)
• Dust bag
• Dust spout
• Blade shroud
• 1/2 Arbor wrench
• M4 pan head screw
• Open end 7/16" wrench
63.5 mm x 140 mm
(2-1/2" x 5-1/2")
63.5 mm x 200 mm
(2-1/2" x 7-7/8")
100 mm x 155 mm
(3-15/16" x 6-3/16")
55 mm x 200 mm
(2-3/16" x 7-7/8")
27 mm x 155 mm
(1-1/16" x 6-3/16")
Right and left 0˚--- 52˚
Miter: Right and left
0˚ --- 47˚
Bevel: Right and left 0˚--- 52˚
Right and left 0˚, 15˚,
22.5˚, 31.6˚, 45˚, 60˚
305 (12") (40 teeth)
15
3,800
Provided (Laser tracking)
Double insulation
None
• 305 mm (12") saw
blade (40 teeth)
• Vise Ass'y
• Crown molding stopper
ass'y
• Dust bag
• Multi purpose tool
• 3 mm hex. bar wrench
• 10 mm/17 mm wrench
• Combination square
B
74 mm x 142 mm
(2-29/32" x 5-19/32")
250 x 160
(9-27/32" x 6-5/16")
625 x 780 x 685
(24-5/8" x 30-23/32" x 27")
C 12LDH C 12FDH
21.5 (47.4 lbs.)
21 (46.3 lbs.)
Digital display
Provided
(Models C 12LDH)
None
None None
Product weight (kg)
31 mm x 203 mm
(1-7/32" x 8")
Miter right/left 45˚
+
Bevel left 45˚
48 mm x 142 mm
(1-7/8" x 5-19/32")
43 mm x 165 mm
(1-11/16" x 6-1/2")
40 mm x 140 mm
(1-9/16" x 5-1/2")
Right and left 0˚--- 48˚
Right and left 0˚--- 48˚
Right and left 0˚--- 47˚Right and left 0˚--- 48˚
Right and left 0˚, 15˚,
22.5˚, 31.6˚, 45˚
300 x 200
(11-13/16" x 7-7/8")
31 mm x 140 mm
(1-7/32" x 5-1/2")
Miter right/left 45˚
+
Bevel right 45˚
30 mm x 142 mm
(1-3/16" x 5-19/32")
---
( --- )
---
( --- )
20.5 (45.1 lbs.)
24.0 (52.8 lbs.)
220 x 180
(8-21/32" x 7-3/32")
645 x 760 x 730
(25-13/32" x 29-15/16" x 28-3/4")
26.0 (57.2 lbs.)
--- 7 ---
7. PRECAUTIONS IN SALES PROMOTION
In the interest of promoting the safest and most efficient use of the Models C 12LDH and C 12FDH Compound
Miter 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 Instruction Manual, and fully
understands the meaning of the precautions listed on the Warning Labels and Caution Labels attached to each
machine.
7-1. Instruction Manual
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 compound miter saw 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 compound miter saw are listed in the Instruction Manual to enhance the safe,
efficient use of the tool by the customer. Salespersons must be thoroughly familiar with the contents of the
Instruction Manual to be able to offer appropriate guidance to the customer during sales promotion.
7-2. Warning Labels and Caution Labels
(1) Precautions on the name plate
Each Model C 12LDH/C 12FDH is furnished with a Name Plate that lists the following precautions.
Fig. 3
Fig. 4
Fig. 5
Warning label (A) specified by the UL is affixed on the right side of the base. Please instruct users to strictly
observe the contents 1 to 9 in warning label (A) shown above.
(3) Caution label (B) (at the side of the gear case)
(2) Warning label (A)
--- 8 ---
Fig. 6
(4)
Caution label (A) (at the front of the hinge) and caution label (C) (at the front of the base)
Do not stare into laser beam. If your eye is exposed directly to the laser beam, it can be hurt. Caution label
(A) and caution label (C) are adhered to each machine to comply with the standards for the safe use of laser
equipment.
Caution label (A) (at the front of the hinge)
(5) Warning label (M) (at the front of sub fence (A) (standard accessory))
Fig. 8
(6) Caution label (L) (at the front of sub fence (B) (standard accessory))
Fig. 9
Caution label (C) (at the front of the base)
Fig. 7
--- 9 ---
(7) Warning label (O) (at the front of sub fence (C) (standard accessory))
Fig. 10
7-3. Relative Standards
Standards, regulations and guidelines for the safe use of laser equipment.
[The U. S. A.]
There is a standard "Complies with 21 Code of Federal Regulation (21 CFR), Chapter 1, Subchapter J, Part 1010
and 1040" established by the Center for Devices and Radiological Health (CDRH) of the Food and Drug
Administration (FDA). Standards, regulations and guidelines of the other countries are under investigation.
7-4. Laser Marker
The Models C 12LDH and C 12FDH are equipped with the laser marker that complies with the U. S. A. standard,
FDA Complies with 21 CFR, Food and Drugs, Part 1040 "Performance Standard for Light-emitting Products",
Class II. The Class II laser is defined as follows:
The laser power is low and it is safe by the protective measures such as blinking. However, it is dangerous if
the operator's eyes are exposed directly to the laser for a protracted period.
The operator can use the laser equipment without particular training and instruction.
The amount of light exposure (output) is 1 mW or less at the position where the operator can be exposed to
the laser radiation during operation.
Table 2
(Threshold value)
Class II accessible emission limit
Emission duration (s)
Wave length
(nm)
(Amount)
(Unit)
> 2.5 x 10
-1
1.0 x 10
-3
W Radiant power
> 400
<
710
The saw blade unit prevents access of the operator's eye to the laser emitting aperture less than 65 mm.
In addition, the amount of light exposure (output) is 1 mW or less (about 0.4 mW) at this position. Thus the
Models C 12LDH and C 12FDH satisfy the Class II requirements adequately. There is no ill effect on the
operator's body if looking at the laser line on the workpiece during operation.
CAUTION: (1) Be sure to disconnect the power cord plug from the receptacle before removing the laser
marker for repair. If it is unavoidable to check the operation of the removed laser marker
with the power turned on, face the laser emitting aperture to the ground to show the laser
line on the ground.
(2) Laser radiation when open. DO NOT STARE INTO BEAM OR VIEW DIRECTLY WITH
OPTICAL INSTRUMENTS.
The lifespan of the laser marker in the Models C 12LDH and C 12FDH are about 2,160 hours. (About three
years: 4 hours of use/day x 180 days/year)
--- 10 ---
7-5. Ambient Illuminance and Visibility of Laser Line
The visibility of the laser line on the workpiece changes depending on the brightness of the working environment.
Instruct the customer to consider the brightness of the working environment when using the laser marker referring
to the following table.
(The working environment where the illuminance is 200 luxes or less is dark and difficult to operate the Models
C 12LDH and C 12FDH.)
The laser line is invisible under direct sunlight of fine weather. Prepare a shaded area or relocate to a shaded
area to operate the Models C 12LDH and C 12FDH .
Table 3 Ambient illuminance and visibility of laser line
Illuminance (lux)
3000 or more
Ambient
conditions
(reference)
Under direct
sunlight of fine
weather
Outdoor
Indoor
3000 or more 3000 - 2500 300 - 200 150 - 80 30 or less800 - 600
Near the window
under cloudy
weather, just
before the
sunset
Ink line is
invisible.
Just before the
sunset in
cloudy
weather
Shaded area
in cloudy
weather
Shaded area
in fine weather
Cloudy
weather
Invisible Visible
Near the
window under
fine weather
Indoor under
fine weather
Near the
window under
cloudy
weather
Indoor under
cloudy
weather
GlaringVisible Visible Visible Glaring
Laser line
--- 11 ---
The Models C 12LDH and C 12 FDH are equipped with the laser
marker for easy alignment with the ink line on the workpiece.
Turn on the digital display switch first then turn on the laser
marker switch. In the case of the Model C 12LDH, the laser
marker does not light if the digital display switch is turned off.
The laser line is adjusted to the width of the saw blade at the time
of factory shipment. Depending upon the cutting choice, align the
laser line with the left side of the cutting width (saw blade) or the
right side according to the following procedure. First, make a
right-angle ink line on the workpiece that is about 38 mm (1-1/2")
in height and 89 mm (3-1/2") in width. To cut the right side of the
ink line with the saw blade as shown in Fig. 14, align the left side
of the saw blade with the ink line on the workpiece and make a
groove of about 5 mm deep on the workpiece to the middle. Hold
the grooved workpiece by the vise as it is and do not move it.
Light up the laser marker. Then insert a 4 mm hex. bar wrench in
the 12 diameter hole on the side of the gear case, turn the hex.
socket set screw to move the laser line. (If you turn the hex.
socket screw clockwise, the laser line will shift to the right and if
you turn it counterclockwise, the laser line will shift to the left.)
(Fig. 13)
Thus the cutting position matches the laser line position. Align the
ink line on the workpiece with the laser line. When aligning the
ink line, slide the workpiece little by little and secure it by vise at a
position where the laser line overlaps with the ink line (Fig. 14).
Work on the grooving again and check the position of the laser
line. When the ink line and the laser line are overlapped, the
strength and weakness of light will change, resulting in a stable
cutting operation because you can easily discern the conformity of
lines. This ensures the minimum cutting errors.
Ink line
Saw blade
Fig. 12
WARNING:
Make sure before plugging the power plug into the receptacle that the main body and the laser
marker are turned off.
Exercise utmost caution in handling a switch trigger for the position adjustment of the laser line, as
the power plug is plugged into the receptacle during operation. If the switch trigger is pulled
inadvertently, the saw blade can rotate and result in unexpected accidents.
Do not remove the laser marker to be used for other purposes.
Workpiece
Cutting width
4 mm hex. bar wrench
Fig. 13
Laser line
Turn
Ink line
Laser line
Fig. 14
Groove
8. ADJUSTMENT AND OPERATION PRECAUTIONS
8-1. Position Adjustment of Laser Line
Fig. 11
Laser marker
switch (Models
C 12LDH and
C 12FDH)
Digital display
switch
(Model C 12LDH
only)
Move
Gear case
--- 12 ---
CAUTION:
Laser radiation - Do not stare into beam.
Laser radiation on work table. Do not stare into beam. If your eye is exposed directly to the laser
beam, it can be hurt.
Do not dismantle it.
Do not give strong impact to the laser marker (main body of tool); otherwise, the position of a laser
line can go out of order, resulting in the damage of the laser marker as well as a shortened service
life.
Keep the laser marker lit only during a cutting operation. Prolonged lighting of the laser marker can
result in a shortened service life.
Use of controls adjustments or performance of procedures other than those specified herein may
result in hazardous radiation exposure.
NOTE:
Perform cutting by overlapping the ink line with the laser line. When the ink line and the laser line
are overlapped, the strength and weakness of light will change, resulting in a stable cutting
operation because you can easily discern the conformity of lines. This ensures the minimum
cutting errors.
In outdoor or near-the-window operations, it may become difficult to observe the laser line due to
the sunlight. Under such circumstances, move to a place that is not directly under the sunlight and
engage in the operation.
Do not tug on the cord behind the motor head or hook your finger, wood and the like around it;
otherwise, the cord may come off and the laser marker may not be lit up.
The laser marker will not light up if the digital display switch is turned off. (Only Model C 12LDH)
Instruct the above precautions on the laser marker to the customers.
--- 13 ---
8-2. Before Cutting
(1) Oblique angle
Before the power tool is shipped from the factory, it is adjusted for 0˚, right angle, left 45˚ bevel cutting angle
and right 45˚ bevel cutting angle with 8 mm bolt (A), 8 mm bolt (B) and 8 mm bolt (C). When changing the
adjustment, change the height of 8 mm bolt (A), 8 mm bolt (B) or 8 mm bolt (C) by turning them.
When changing the bevel angle to the right 45˚, pull the set pin on the direction shown in Fig. 8-b and incline
the motor head to the right.
When adjusting the motor head to 0˚, always return the set pin to its initial position as shown in Fig. 15-a.
NOTE: Do not adjust the 8 mm bolt with bevel plates (Fig. 15-a) pulled.
Fig. 15-a
Fig. 15-b
Bevel plate
Indicator
(for right bevel scale)
8 mm bolt (C)
(stopper for right 45˚ bevel angle)
8 mm bolt (B)
(stopper for left 45˚ bevel angle)
Pull
8 mm bolt (A)
(stopper for 0˚)
Indicator
(for left
bevel scale)
Set pin
(2) Securing the workpiece
WARNING: Always clamp or vise to secure the workpiece to the fence; otherwise the workpiece
might be thrust from the table and cause bodily harm.
Steel square
Holder
(optional
accessory)
Height adjustment bolt 6 mm
(optional accessory)
6 mm wing nut
(optional
accessory)
6 mm wing bolt
(optional accessory)
Base
surface
Fig. 16
Set pin
Return
(3) Installing the holders (Optional accessory)
The holders help keep longer workpieces stable and in place during the cutting operation.
(1) As indicated in Fig. 16, use a steel square for aligning the upper edge of the holders with the base
surface. Loosen the 6 mm wing nut. Turn a height adjustment bolt 6 mm, and adjust the height of the
holder.
(2) After adjustment, firmly tighten the wing nut and fasten the holder with the 6 mm wing bolt (optional
accessory). If the length of the height adjustment bolt 6 mm is insufficient, spread a thin plate beneath.
Make sure the end of the height adjustment bolt 6 mm does not protrude from the holder.
--- 14 ---
(4) Stopper for precision cutting (Stopper and holder are optional accessory)
The stopper facilitates continuous precision cutting in lengths of 11" to 17-3/4" (280 mm to 450 mm).
To install the stopper, attach it to the holder with the 6 mm wing bolt as shown in Fig. 17.
Fig. 17
Workpiece
Stopper
(optional accessory)
Height adjustment bolt 6 mm (optional accessory)
6 mm wing nut (optional accessory)
Holder
(optional accessory)
6 mm wing nut
(optional accessory)
8-3. How to Use the Vise Assembly
(1) The vise assembly can be mounted on either the left
fence (fence (B)) or the right fence (fence (A)) by
loosening 6 mm wing bolt (A).
(2) The screw holder can be raised or lowered according to
the height of the workpiece by loosening 6 mm wing bolt
(B). After the adjustment, firmly tighten 6 mm wing bolt
(B) and fix the screw holder.
(3) Turn the upper knob and securely fix the workpiece in
position (Fig. 18).
Fig. 18
Workpiece
Knob
Vise plate
6 mm wing bolt (B)
6 mm wing bolt (A)
Screw holder
Fence
Vise shaft
WARNING: Always firmly clamp or vise to secure the workpiece to the fence; otherwise the workpiece
might be thrust from the table and cause bodily harm.
CAUTION: Always confirm that the motor head does not contact the vise assembly when it is lowered
for cutting. If there is any danger that it may do so, loosen 6 mm wing bolt (B) and move
the vise assembly to a position where it will not contact the saw blade.
--- 15 ---
8-4. Confirmation for Use of Sub Fence
(1) Confirmation for use of sub fence (A)
WARNING: In the case of right bevel cutting, turn sub fence (A) clockwise. Unless it is turned
clockwise, the main body or saw blade may contact sub fence (A), resulting in an injury.
This power tool is equipped with sub fence (A).
In the case of direct angle cutting and left bevel angle
cutting, use sub fence (A). Then you can realize
stable cutting of the material with a wide back face.
In the case of right bevel cutting, raise sub fence (A)
up as illustrated in Fig. 19 and then turn it clockwise.
Fig. 19
Fig. 21
Fig. 20
Sub fence (A)
Turn
Fence (A)
Left bevel angle cutting
Direct angle cutting
Left bevel angle
cutting
Right bevel
angle cutting
(2) Confirmation for use of sub fence (B)
WARNING: In the case of left bevel cutting, turn sub fence (B) counterclockwise. Unless it is turned
counterclockwise, the main body or saw blade may contact sub fence (B), resulting in an
injury.
This power tool is equipped with sub fence (B). In the
case of direct angle cutting and right bevel angle
cutting, use sub fence (B). Then you can realize stable
cutting of the material with a wide back face.
In the case of left bevel cutting, raise sub fence (B) up
as illustrated in Fig. 20 and turn it counterclockwise.
Turn
Sub fence (B)
Fence (B)
Right bevel angle cutting
Direct angle cutting
(3) Confirmation for use of sub fence (C)
WARNING: In the case of left bevel angle cutting, remove sub fence (C). If sub fence (C) is not
removed, sub fence (C) will contact the main unit or the saw blade and result in injury.
This power tool is equipped with sub fence (C). In the
case of direct angle cutting and right bevel angle
cutting, use sub fence (C). (Fig. 21)
Then you can realize stable cutting of the material with
a wide back face.
Fence (B)
Sub fence (C)
--- 16 ---
In the case of left bevel angle cutting, remove sub fence (C)
by sliding to the side and removing from the top as shown in
Fig. 21. Loosen knob (B) then remove sub fence (C) (Fig. 22).
Sub fence (C)
Fig. 22
WARNING: To attach sub fence (C), insert then securely
tighten knob (B). If knob (B) is loose, sub
fence (C) may move during cutting and result in
injury.
Fence (B)
Knob (B)
--- 17 ---
CAUTION:
When the workpiece is secured on the left side, the cut-off
portion comes to rest on the side of the saw blade as illustrated
in Fig. 23. If the handle is raised before the saw blade rotation
comes to a complete stop, there is a chance that the cut-off
portion of the workpiece could become jammed against the
saw blade, causing a hazardous condition. Instruct the
customer to ensure without fail that the saw blade comes to a
complete stop before attempting to raise the handle.
Cut-off-side
workpiece
Saw blade
Fixed-side workpiece
Fig. 23
8-5. Cutting Operation
(1) Cutting efficiency will be reduced if a dull saw blade is used, if an excessively long extension cord is used, or if
the wire gauge of the extension cord is too small. (For details on extension cords, please refer to the
Instruction Manual.) This is particularly important when cutting materials with dimensions which are at or near
the maximum capacity for the machine.
(2) The customer should be advised to thoroughly inspect the workpiece to ensure that there are no metallic
objects (nails in particular), sand, or other foreign matter in or on the workpiece. Saw blade contact with such
foreign matter will not only shorten the service life of the saw blade, but could cause serious accident. Should
the saw blade tips be broken off, the tips may fly toward the operator.
(3) Direct current cannot be used. The switch can be faulty if used.
(4) Press cutting
The Models C 12LDH and C 12FDH can be used for press cutting of workpieces up to 70 mm x 203 mm
(2-3/4" x 8") in a single operation by simply pushing the saw blade section (head) downward.
The customer should be cautioned that excessive pressure on the handle will not increase the cutting speed.
On the contrary, excessive pressure may result in reduced cutting efficiency (irregular or rough cutting of the
workpiece), and could also cause overload and subsequent burnout of the motor.
On completion of the cutting operation, turn the switch OFF and wait for the saw blade to come to a complete
stop before raising the saw blade section (head) to its original position. Raising the saw blade section (head)
while the saw blade is rotating may cause unwanted cutting marks on the workpiece.
Techniques to avoid unwanted cutting marks
Uneven and unwanted cutting marks can be avoided throughout the cutting operation by gently and smoothly
pressing down on the handle, so that the entire cutting operation is accomplished in a single uninterrupted
motion.
(5) Miter cutting
Miter cutting is accomplished by turning the table. (For details, please refer to the Instruction Manual.)
(6) Bevel cutting
Bevel cutting of 0 --- 45˚ to the left/right is accomplished by inclining the saw blade section (head). (For details,
please refer to the Instruction Manual.)
--- 18 ---
Type of
crown molding
To process crown molding at
positions and in Fig. 24
To process crown molding at
positions and in Fig. 24
Miter angle
setting
Bevel angle
setting
Miter angle
setting
Bevel angle
setting
Right 35.3˚
( mark)
Left 30˚
( mark)
Left 35.3˚
( mark)
Left 30˚
( mark)
45˚ type
Right 31.6˚
( mark)
Left 33.9˚
( mark)
Left 31.6˚
( mark)
Left 33.9˚
( mark)
38˚ type
3
1 4
2
Table 4
(8) Crown molding cutting
This machine can cut two types of crown molding workpieces by combining the miter and bevel cutting
operations (for USA).
Figure 24 shows two common crown molding types having angles of (θ) 38˚ and 45˚. For the typical crown
molding fittings, see Fig. 25.
(7) Compound (miter + bevel) cutting
Compound cutting can be accomplished by combining the miter cutting and bevel cutting operations described
in paragraphs (5) and (6) above. (For details, please refer to the Instruction Manual.) When the saw blade
section (head) is inclined 45˚ to the right and left, the table can be turned up to 45˚ to the right and left.
The table below shows the miter angle and the bevel angle settings that are ideal for the two crown molding
types.
NOTE: For convenience, positive stops are provided for both the miter setting (left and right 31.6˚) and
the bevel setting positions.
For miter cut setting
If the turn table has been set to either of the angles described, move the turn table adjusting the side
handle a little to the right and left to stabilize the position and to properly align the miter scale and the tip of
the indicator before the operation starts.
For bevel cut setting
Move handle on miter section to the right and left and check that the position is stable and the angle scale
and the tip of the indicator are properly aligned. Then tighten the clamp lever.
Upper surface ceiling
Wall
Lower surface
Fig. 24 Fig. 25
Outside corner
Ceiling
Wall
Inside corner
A
B
2
3
θ˚
4
1
--- 19 ---
(1) Setting to cut crown molding at positions and in Fig. 25 (See Fig. 26; tilt the head to the left.):
Turn the turn table to the right and set the miter angle as follows:
For 45˚ type crown moldings: 35.3˚ ( mark)
For 38˚ type crown moldings: 31.6˚ ( mark)
Turn the head to the left and set the bevel angle as follows:
For 45˚ type crown moldings: 30˚ ( mark)
For 38˚ type crown moldings: 33.9˚ ( mark)
Position the crown molding so that the lower surface ( in Fig. 24) contacts the fence as indicated in
Fig. 28.
1
4
2
3 A
1
Head
Miter angle scale
Bevel angle scale
Fig. 26
(2) Setting to cut crown moldings at positions and in Fig. 25 (See Fig. 27; tilt the head to the left.):
Turn the turn table to the left and set the miter angle as follows:
For 45˚ type crown moldings: 35.3˚ ( mark)
For 38˚ type crown moldings: 31.6˚ ( mark)
Tilt the head to the left and set the bevel angle as follows:
For 45˚ type crown moldings: 30˚ ( mark)
For 38˚ type crown moldings: 33.9˚ ( mark)
Position the crown molding so that the lower surface ( in Fig. 24) contacts the fence as indicated in
Fig. 29.
2 3
1
2
3
B
Fig. 27
Bevel angle scale
Turn table
Fence (A)
Miter angle scale
Fig. 28
Fig. 29
Fence
Table on base
Fence
Table on base
B
A
B
A
2
3
4
1
Base
Turn table
Base
Head
CAUTION: In the case of left bevel angle cutting, remove sub fence (C) before operation.
(Figs. 26 and 27)
Sub fence (C)
Sub fence (C)
Fence (B)
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