Hitachi SV 12SH User manual

TECHNICAL DATA
AND
SERVICE MANUAL
ORBITAL SANDER
SV 12SH
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
LIST No. 0354 Jan. 2005
S
MODEL
SV 12SH
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
MAKITA BO4561
C

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
5-1. Specifications ......................................................................................................................................3
6. COMPARISONS WITH SIMILAR PRODUCTS ................................................................................. 4
7. PRECAUTIONS IN SALES PROMOTION ........................................................................................ 5
7-1. Handling Instructions ..........................................................................................................................5
7-2. Precautions on Nameplate .................................................................................................................5
8. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY ............................................................... 6
8-1. Disssembly .........................................................................................................................................6
8-2. Reassembly ........................................................................................................................................6
8-3. Tightening Torque ...............................................................................................................................7
8-4. Wiring Diagram ...................................................................................................................................8
8-5. Insulation Tests ...................................................................................................................................8
8-6. No-load Current Value ........................................................................................................................8
9. STANDARD REPAIR TIME (UNIT) SCHEDULES ............................................................................ 9
Assembly Diagram for SV 12SH

--- 1 ---
1. PRODUCT NAME
Hitachi Orbital Sander, Model SV 12SH
2. MARKETING OBJECTIVE
The Model SV 12SH is a new orbital sander developed to fill out our orbital sander series. The Model SV 12SH
has the following features.
(1) Triangle pad (base) for optimal finishing in narrow areas such as corners and clearances
(2) High power and class-top sanding amount
(3) Class-top dust collecting performance
(4) All new design. The large soft grip comfortably fits in the palm of a hand for ease of operation.
3. APPLICATIONS
The Model SV 12SH is used for the following applications generally in narrow areas such as corners and
clearances.
Finish polishing of woodwork surface
Sanding surface of woodwork or sheet metal prior to painting etc.
4. SELLING POINTS
All new design
The large soft grip comfortably fits in the
palm of a hand for ease of operation.
C: Not provided.
High power and class-top sanding amount
1.27 times higher than C.
Class-top dust collecting performance
1.18 times higher than C.
Triangle pad (base) for optimal finishing in
narrow areas such as corners and clearances!

--- 2 ---
* Testing conditions for measurement of the sanding amount and the percentage of dust collection
Workpiece: Lauan Pressing load: 29.4 N (3 kgf)
Sanding time: 15 minutes Sanding paper: AA100
4-1. Selling Point Descriptions
(1) Triangle pad (base) for optimal finishing in narrow areas such as corners and clearances!
The Model SV 12SH is equipped with a triangle pad (base). It is very convenient for finishing in narrow areas
such as corners and undersides of stairs, which is impossible for the conventional orbital sanders.
Maker
HITACHI
C
Sanding amount
56 g
44 g
Model
SV 12SH
Sanding ratio
100
79
Maker
HITACHI
C
Rated input
200 W (120 V, 1.7 A)
160 W (115 V, 1.6 A)
Model
SV 12SH
Rated input ratio
100 (100)
80 (94)
Maker
HITACHI
C
Maximum output
101 W
92 W
Model
SV 12SH
Maximum output ratio
100
91
Maker
HITACHI
C
Percentage of dust collection
71 %
60 %
Model
SV 12SH
Dust collection ratio
100
85
(3) Class-top dust collecting performance
(4) All new design. The large soft grip comfortably fits in the palm of a hand for ease of operation.
The Model SV 12SH has a large soft grip that comfortably fits in the palm of a hand (double molded housing
with elastomer). It is easier to operate than the current model and C.
(2) High power and class-top sanding amount

--- 3 ---
Specifications
Item
Enclosure
Housing Glassfiber reinforced polycarbonate (green)
and elastomer (black)
Glassfiber reinforced polycarbonate (black)
••••••••••••••••••••
200 W
5. SPECIFICATIONS
5-1. Specifications
Sanding paper size
Power source
Weight
Packaging
* Standard accessories
Square: 110 mm x 100 mm (4-1/2" x 4")
Triangle: 96 mm x 96 mm x 96 mm (3-3/4" x 3-3/4" x 3-3/4")
AC single phase 50 Hz or 60 Hz
1.0 kg (2.2 lbs.)
1.5 kg (3.3 lbs.)
Corrugated cardboard box
Sanding paper (Velcro type) (Square) ••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
Sanding paper (Velcro type) (Triangle) •••••••••••••••••••••••••••••••••••••••••••••••••••• 2
Dust bag ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
Voltage, current and
power input
Type of switch Slide switch
AC single phase commutator motor
Type of motor
110 mm x 190 mm (4-1/2" x 7-1/2")
1.5 mm (1/16")
110 V
1.9 A
No-load speed 14,000/min.
Net*(excludes cord)
Gross
*: Depends on the market.
Sanding pad size
Orbital diameter
220 V
0.95 A
230 V
0.91 A
240 V
0.87 A
120 V
1.7 A
Base •••••••••••••••••••••••••

--- 4 ---
6. COMPARISONS WITH SIMILAR PRODUCTS
Maker •Model
Item
Sanding
paper size
Sanding pad size
W
/min
kg
Power input
No-load noise level
Weight (excludes cord)
Max. output *1
No-load noise level *1
Orbital diameter
mm
mm
mm
Overall height
*1: Depends on the market.
Standard accessories *1
No-load vibration level *1
Sanding paper (1 pc.)
(Velcro type/square)
Sanding paper (2 pcs.)
(Velcro type/triangle)
Dust bag (1 pc.)
HITACHI
SV 12SH
110 x 100
(4-1/2" x 4")
200
(120 V, 1.7 A)
14,000
1.0
(2.2 lbs.)
101
110 x 190
(4-1/2" x 7-1/2")
82
1.5
(1/16")
107
133 (5-1/4")
Provided
Name plate and catalog specifications
dB
dB
mm
W
Soft-touch grip
Sanding paper (3 pcs.)
(Velcro type/square)
Sanding paper (3 pcs.)
(Velcro type/triangle)
Dust bag (1 pc.)
112 x 102
(4-1/2" x 4")
160
(115 V, 1.6 A)
14,000
0.95
(2.1 lbs.)
92
112 x 190
(4-3/8" x 7-1/2")
85
1.5
(1/16")
109
135 (5-1/4")
Provided
C
Square
Triangle mm 96 x 96 x 96
(3-3/4" x 3-3/4" x 3-3/4")
95 x 95 x 95
(3-3/4" x 3-3/4" x 3-3/4")

--- 5 ---
7. PRECAUTIONS IN SALES PROMOTION
In the interest of promoting the safest and most efficient use of the Model SV 12SH Orbital Sander 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, and fully understands the meaning of the
precautions listed on the nameplate attached to each tool.
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 the hand shear are listed in the Handling Instructions to
enhance the safe, 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.
7-2. Precautions on Nameplate
Each Model SV 12SH is provided with a nameplate which lists basic safety precautions (illustrated below) in its
use. Carefully ensure that the customer fully understands and follows these precautions before using the tool.
(1) For the U.S.A. and Canada
(2) For Australia

--- 6 ---
8. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY
The [Bold] numbers in the descriptions below correspond to the item numbers in the Parts List and exploded
assembly diagram.
8-1. Disassembly
(1) Removal of the Armature [23] and the Stator [20]
Remove the four Seal Lock Screws M4 x 10 [16], and remove the Base [15] and Felt [32].
Remove the two Tapping Screws (W/Flange) D4 x 16 [31], and remove the Fan Guide [30].
Keeping a screwdriver inserted into the clearance of the Balance Fan [25], remove the Seal Lock Flat Hd.
Screw M4 x 12 [29]. Remove the Washer [28], Ball Bearing 6001DDCMPS2L [27], Dust Washer [26] and
Balance Fan [25].
Remove the four Tapping Screws (W/Flange) D4 x 20 (Black) [2], and remove Housing (A). (B) Set [3].
Remove the Carbon Brush (1 Pair) [13] together with the Brush Holder [12]. Lift the Stator [20] and pull out
the Armature [23].
After pulling out the Armature [23], disconnect the Internal Wire (Brown) [5], Internal Wire (B) (Blue) [22], Tab
Terminal (Blue) [6] and Tab Terminal (Brown) [21] from the terminals of the Stator [20]. Then pull out the
Stator [20].
1
2
3
4
6
8-2. Reassembly
Reassembly can be accomplished by following the disassembly procedures in reverse. However, special
attention should be given to the following items.
(1) Assembly of the Dust Washer [26]
Be sure to mount the Dust Washer [26] in correct direction as shown in Fig. 1. Otherwise, the Ball Bearing
6001DDCMPS2L [27] can be damaged at an early stage.
Fig. 1
Dust Washer [26]
Ball Bearing 6001DDCMPS2L [27]

--- 7 ---
Internal Wire (Brown) [5]
Internal Wire (Blue) [22]
Tab Terminal (Blue) [6]
Fig. 2
Tab Terminal (Brown) [21]
(2) Wiring the Stator [20]
When wiring the Stator [20], be sure to insert each terminal in correct direction as shown in Fig. 2. At this
time, securely insert each terminal as far as it will go.
8-3. Tightening Torque
(1) Tapping Screw (W/Flange) D4 x 20 (Black) [2] ........................... 2.0 0.5 N.m (20 5 kgf.cm, 1.5 0.4 ft-lbs.)
(2) Tapping Screws (W/Flange) D4 x 16 [7] [31] .............................. 2.0 0.5 N.m (20 5 kgf.cm, 1.5 0.4 ft-lbs.)
(3) Seal Lock Screw M4 x 10 [16] ..................................................... 1.8 0.4 N.m (18 4 kgf.cm, 1.3 0.3 ft-lbs.)
(4) Seal Lock Flat Hd. Screw M4 x 12 [29] ....................................... 1.8 0.4 N.m (18 4 kgf.cm, 1.3 0.3 ft-lbs.)
Viewed from the commutator

--- 8 ---
8-4. Wiring Diagram
8-5. Insulation Tests
On completion of disassembly and repair, measure the insulation resistance and conduct the dielectric strength
test.
Insulation resistance: 7 M Ωor more with DC 500 V megohm tester
Dielectric strength: AC 4,000 V/1 minute, with no abnormalities ...........................................220 V --- 240 V
AC 2,500 V/1 minute, with no abnormalities ...........................................110 V --- 127 V
8-6. No-load Current Value
After no-load operation for 30 minutes, the no-load current value should be as follows:
Voltage (V)
Current (A) max.
110 V
1.50
120 V
1.45
220 V 230 V 240 V
0.75
Tab Terminal (Blue) [6]
Tab Terminal (Brown) [21]
Pillar Terminal [17]
Internal Wire (Blue) [22]
White or blue
Internal Wire (Brown) [5]
For AUS and Europe
Noise Suppressor [4]
Black or brown
Slide Switch (1P Screw Type) [18]
Cord
Stator [20]
Fig. 3
Stator [20]

--- 9 ---
9. STANDARD REPAIR TIME (UNIT) SCHEDULES
MODEL 10 20 30 40 50 60 min.
Fixed
Variable
SV 12SH
Work Flow
Slide Switch
Cord
Cord Armor
Base
Ball Bearing
6001DD
Ball Bearing
626VV
Ball Bearing
629VV
Balance Fan
Fan Guide
Housing
(A).(B) Set
Stator
Leg x 2
Armature
General Assembly

ELECTRIC TOOL PARTS LIST
LIST NO. 0354
ORBITAL SANDER
Model SV 12SH
2005
•
1
•
15
(E1)
Hitachi Power Tools
504
1
2
3
45678
9
10
11
12 13
14
15
16
17 18
19 20
21 22
23
24
25
26
27
28
29
30
31
32
14
501
502
503

*ALTERNATIVE PARTS--- 2 ---
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
PARTS
1 -- 05
SV 12SH
1NAME PLATE 1
2301-653 TAPPING SCREW (W/FLANGE) D4X20 (BLACK) 4
3322-766 HOUSING (A). (B) SET 1
*4 930-039 NOISE SUPPRESSOR 1 EXCEPT FOR USA, CAN
5322-764 INTERNAL WIRE (BROWN) 1
6322-761 TAB TERMINAL (BLUE) 1
7984-750 TAPPING SCREW (W/FLANGE) D4X16 2
8937-631 CORD CLIP 1
*9 500-409Z CORD 1
*9 500-435Z CORD 1 FOR GBR (230V)
*9 500-461Z CORD 1 FOR GBR (110V)
*9 500-240Z CORD 1 FOR USA, CAN
*9 500-439Z CORD 1 FOR AUS
10 953-327 CORD ARMOR D8.8 1
11 HITACHI LABEL 1
12 930-483 BRUSH HOLDER 2
13 999-041 CARBON BRUSH (1 PAIR) 2
14 322-756 LEG 2
15 324-141 BASE 1
16 324-082 SEAL LOCK SCREW M4X10 4
17 938-307 PILLAR TERMINAL 1
18 311-948 SLIDE SWITCH (1P SCREW TYPE) 1
19 626-VVM BALL BEARING 626VVC2PS2L 1
*20 340-578C STATOR 110V 1
*20 340-578D STATOR 120V 1
*20 340-578E STATOR 220V-230V 1
*20 340-578F STATOR 240V 1
21 322-762 TAB TERMINAL (BROWN) 1
22 322-763 INTERNAL WIRE (BLUE) 1
*23 360-637C ARMATURE 110V 1
*23 360-637U ARMATURE ASS’Y 120V 1 INCLUD. 19, 24
*23 360-637E ARMATURE 220V-230V 1
*23 360-637F ARMATURE 240V 1
24 629-VVM BALL BEARING 629VVC2PS2L 1
25 324-140 BALANCE FAN 1
26 993-052 DUST WASHER 1
27 600-1DD BALL BEARING 6001DDCMPS2L 1
28 987-169 WASHER 1
29 993-244 SEAL LOCK FLAT HD. SCREW M4X12 1
30 322-758 FAN GUIDE 1
31 984-750 TAPPING SCREW (W/FLANGE) D4X16 2
32 311-946 FELT 1

*ALTERNATIVE PARTS --- 3 ---1 -- 05
STANDARD ACCESSORIES
OPTIONAL ACCESSORIES
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
SV 12SH
* 501 310-339 DUST BAG 1
* 501 323-004 DUST BAG 1 FOR USA, CAN
502 323-969 SANDING PAPERS 96X96 AA100 (10 PCS.) 2
503 310-345
SANDING PAPERS 110X100 AA100 (10 PCS.) 1
*504 310-340 PUNCH PLATE 1 FOR GBR
601 310-340 PUNCH PLATE 1
602 323-968 SANDING PAPERS 96X96 AA60 (10 PCS.) 1
603 323-970 SANDING PAPERS 96X96 AA150 (10 PCS.) 1
604 310-344
SANDING PAPERS 110X100 AA60 (10 PCS.) 1
605 310-346
SANDING PAPERS 110X100 AA150 (10 PCS.) 1

--- 4 ---
ITEM
NO. CODE NO. DESCRIPTION REMARKS
NO.
USED
1 -- 05
SV 12SH
Printed in Japan
(050115N)