Hitachi SB 8V2 Manual

TECHNICAL DATA
AND
SERVICE MANUAL
76 mm (3”) BELT SANDER
SB 8V2
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
LIST No: 0361 Mar. 2007
S
MODELS
SB 8V2
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
Competitor
Company Name Model Name
MAKITA 9903
C1
DEWALT DW433
D1

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
6. SPECIFICATION COMPARISONS WITH SIMILAR PRODUCTS................................................... 4
7. PRECAUTIONS IN SALES PROMOTION ...................................................................................... 5
7-1. Handling Instructions ........................................................................................................................5
7-2. Precautions on Caution Plate ...........................................................................................................5
8. DUST COLLECTION ....................................................................................................................... 6
8.1 Dust Collector ....................................................................................................................................6
8.2 To Maintain Dust Collecting Performance ..........................................................................................6
8.3 Others ................................................................................................................................................6
9. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY ............................................................. 7
9-1. Disassembly .....................................................................................................................................7
9-2. Reassembly .................................................................................................................................... 11
9-3. Wiring Procedures ..........................................................................................................................12
9-4. Wiring Diagram ...............................................................................................................................12
9-5. Tightening Torque ...........................................................................................................................13
9-6. Insulation Test .................................................................................................................................13
9-7. No-load Current Value ....................................................................................................................13
10. STANDARD REPAIR TIME (UNIT) SCHEDULES ...................................................................... 14
Assembly Diagram for SB 8V2

--- 1 ---
1. PRODUCT NAME
Hitachi 76 mm (3") Belt Sander, Model SB 8V2
2. MARKETING OBJECTIVE
The new Model SB 8V2 is the upgraded version of the current Model SB 75. The key features of the Model
SB 8V2 are as follows:
(1) 1,020 W powerful motor (120 V: 9.0 A)
(2) Soft grip handles (Handle and sub handle)
(3) Clear cover for checking the sanding position during operation
With the new Model SB 8V2, please expand the sales of our belt sander series.
3. APPLICATIONS
[For construction working, inside working, sign painting, wood working, furniture making, etc.]
Sanding wood and steel materials
Removing old paint
Preliminary sanding before painting
4. SELLING POINTS
1,020 W (120 V: 9.0 A)
Powerful motor
Variable speed dial
Longer-life drive belt
two times longer than the
conventional model thanks
to the wear-resistant belt
Model SB 8V2
Improvement of
corner work
(The pulley is flush
with the main body.)
Clear cover for checking
the sanding position
during operation
Completely novel design
Improvement of corner work
(The dust bag is positioned at the left.)
Soft grip handles
(Handle and sub handle)

--- 2 ---
C1
1,010
D1
800
SB 8V2
1,020
SB 75
950
4-1. Selling Point Descriptions
(1) Soft grip handles
The handle and the sub handle have a soft grip each. The Model SB 8V2 is easier to operate than the
conventional model and competitors.
Model name
Power input (W)
(4) Improvement of corner work
Corner sanding can be done more efficiently
because the dust bag is positioned at the left
of the Model SB 8V2 and the pulley is flush
with the main body.
(5) Variable speed dial
The Model SB 8V2 is equipped with a variable
speed dial for adjusting to the desired speed
depending on applications and workpieces.
Dial "1" ... Minimum speed
Dial "5" ... Maximum speed
Dust bag
(2) Clear cover
The Model SB 8V2 is equipped with a clear
cover at the top of the body. The sanding belt
can be visually checked through the clear
cover during operation.
Sanding belt Body
Adjust screw
(3) 1,020 W powerful motor
The Model SB 8V2 is suitable for heavy-duty operation thanks to the higher-power motor.
(6) Improvement of drive belt lifetime
The service life of the Model SB 8V2 is two
times longer than the conventional Model SB 75
thanks to the wear-resistant drive belt.
Pulley
Main body
Variable speed dial

--- 3 ---
Corrugated cardboard box
4.3 kg (9.5 lbs.)
5. SPECIFICATIONS
Trigger switch with stopper
Capacity
Model SB 8V2
Weight
Standard accessories Sanding belt (WA #80) .......................................................................... 1
Dust bag ................................................................................................ 1
(*1): Depends on the market.
Ten sanding belts of one kind are contained in a package (optional accessory).
AA: Optimum for sanding ordinary steel, special steel, stainless steel, hardwood, bamboo and so on
WA: Optimum for sanding wood, particularly hardwood
Voltage and current
76 mm (3")
Voltage (V)
110
120
220
230
240
Power source
Type of switch
AC single phase 50 or 60 Hz
Single-phase series commutator motor
Type of motor
Current
9.8
9.0
4.9
4.7
4.5
Power input 1,020 W
250 to 450 m/min. (820 to 1,475 ft/min.)
No-load belt speed
Enclosure
Housing
Handle cover
Body
Dust cover
Belt cover
Polycarbonate resin + Elastomer
Polycarbonate resin + Elastomer
Aluminum alloy diecasting
Aluminum alloy diecasting
Polycarbonate resin
Packing
(*1)
Optional accessories Sanding belt
Grit No.
30
40
60
80
100
120
Grain
AA
AA, WA
AA, WA
AA, WA
AA, WA
AA, WA
Grit No.
150
180
240
320
400
Grain
AA, WA
AA, WA
AA, WA
AA
AA

--- 4 ---
6. SPECIFICATION COMPARISONS WITH SIMILAR PRODUCTS
Weight
Power input
Dust bag position
Dust collection rate (*2)
Handle
Sub handle
HITACHI
SB 8V2
76 x 533
(3" x 21")
Clear cover
Width
Soft grip
Capacity
Belt size
Belt
speed
Speed
control
(mm)
(m/min)
(ft/min)
Sanding amount (*2)
(%)
(g)
(dB)
No-load noise
Type of belt
(mm)
Standard accessories
SB 75
76 x 533
(3" x 21")
4.3 (9.5 lbs.)
1,020
Left
81
Variable speed
dial setting
250 --- 450
(820 --- 1,475)
120 (0.26 lbs.)
87
171 (6-3/4")
Dust bag ... 1
Sanding belt
4.4 (9.7 lbs.)
950
Right
80
2-speed
slide switch
360 --- 450
(1,180 --- 1,475)
130 (0.29 lbs.)
94
183 (7-7/32")
Dust bag ... 1
Sanding belt
76 x 533
(3" x 21")
4.3 (9.5 lbs.)
1,010
Left
81
Variable speed
dial setting
210 --- 440
(690 --- 1,440)
120 (0.26 lbs.)
85
145 (5-23/32")
Dust bag ... 1
Sanding belt
C1
76 x 533
(3" x 21")
5.6 (12 lbs.)
800
Left
50
Variable speed
dial setting
259 --- 427
(850 --- 1,400)
110 (0.24 lbs.)
84
155 (6-3/32")
Dust bag ... 1
Sanding belt
D1
(*2) Test conditions
Workpiece: Lauan Sanding paper: WA#80
Applied load: Tool weight + 3 kg Sanding time: 5 minutes
Belt speed: Maximum
Poly V belt
(wear-resistant) Poly V belt
(kg)
(W)

--- 5 ---
7. PRECAUTIONS IN SALES PROMOTION
In the interest of promoting the safest and most efficient use of the Model SB 8V2 Belt 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 caution plate 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 belt sander 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 Caution Plate
Each Model SB 8V2 is provided with a caution plate 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, New Zealand, Asia and South Africa
(3) For Taiwan
(3) For China

--- 6 ---
8. DUST COLLECTION
8.1 Dust Collector
This is a system in which the housing is provided with a dust fan on its side so that air pressure from the dust fan
causes grinding dust to be drawn in from the inlet and collected in a dust bag.
8.2 To Maintain Dust Collecting Performance
When moist dust is drawn in, the dust collecting section becomes clogged and impairs dust-collecting
performance. Instruct the customer to operate the equipment in a dry location as much as possible.
A clogged dust bag impairs dust-collecting performance. Instruct the customer to frequently clean the dust
bag.
Overflow of dust in the dust bag impairs dust-collecting performance. Instruct the customer to empty the dust
bag when dust has been collected to about 70 % of bag capacity.
8.3 Others
Should sparks created from sanding smolder in the dust bag after sanding a steel plate etc., there is a risk of
burning. Instruct the customer to always remove sanding dust from the dust bag.

--- 7 ---
9. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY
Precautions on operation are given in the instruction manual; the followings are special precautions on
disassembly, reassembly and repair.
When tightening a tapping screw, align the holes on both sides.
The [Bold] numbers in the descriptions below correspond to the item numbers in the Parts List and the exploded
assembly diagram for the Model SB 8V2.
CAUTION: Be sure that the plug is disconnected from the power source during disassembly, reassembly
and sanding belt replacement.
9-1. Disassembly
(1) Removal of Belt Tensioner (A) [52] and the Idle Pulley Ass'y [39] (Fig. 1)
(a) After removing the sanding belt, return the lever to its original position and loosen two Machine Screw
M4 x 14 [51]. And then pull out Belt Tensioner (A) [52].
(b) After taking out the Retaining Ring for D10 Shaft [48] and removing Shaft (B) [49], remove the Idle Pulley
Ass'y [39].
Washer (B) [37]
Body Ass'y [45]
Idle Pulley Ass'y [39]
Fig. 1
(2) Removal of Pulley (B) [54], Gear [60], Drive Pulley [65] and Dust Cover [16] (Fig. 2)
(a) Loosen each one of the Machine Screw (W/Washers) M4 x 12 (Black) [8] and the Tapping Screw
(W/Flange) D4 x 30 (Black) [40]. Then remove the Belt Cover [14].
(b) Remove the Belt [53].
(c) Loosen three Machine Screws M4 x 14 [51] and remove the Gear Cover [55] with Pulley (B) [54], Ball
Bearing 6200VVCMPS2L [56] and Pinion [57].
(d) Hold the Pinion [57] with a vice with care not to damage it, and turn Pulley (B) [54] in a counterclockwise
direction with a wrench.
Washer (B) [37]
Machine Screw
M4 x 14 [51]
Belt Tensioner (A) [52]
Shaft (B) [49]
Retaining Ring
for D10 Shaft
[48]