Hitachi PDA-100G, G 10SK2 Technical Data And Service Manual
POWER TOOLS
TECHNICAL DATA
AND
SERVICE MANUAL
DISC GRINDER
PDA-100G
G 10SK2
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
LIST No. PDA-100G:E248
G 10SK2: E249
Mar. 2002
MODEL
PDA-100G
G 10SK2
P
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
BOSCH
GWS6-100
B
MAKITA
9523NB
C
Page
CONTENTS
1. PRODUCT NAME ........................................................................................................................... 1
2. MARKETING OBJECTIVE .............................................................................................................1
3. APPLICATIONS ..............................................................................................................................1
4. SELLING POINTS ..........................................................................................................................1
5. SPECIFICATIONS ..........................................................................................................................4
6. COMPARISONS WITH SIMILAR PRODUCTS ..............................................................................5
6-1. Specification Comparisons ............................................................................................................ 5
6-2. Comparisons in Torque vs. Rotation Speed and Stator Coil Temperature Rise ............................ 6
7. PRECAUTIONS IN SALES PROMOTION .....................................................................................7
7-1. Handling Instructions ..................................................................................................................... 7
7-2. Caution Plate ................................................................................................................................. 7
7-3. Precautions on Usage ................................................................................................................... 7
8. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY ............................................................8
8-1. Disassembly .................................................................................................................................. 8
8-2. Reassembly ................................................................................................................................... 9
8-3. Lubrication Points and Types of Lubricant ................................................................................... 12
8-4. Tightening Torque ........................................................................................................................ 12
8-5. Wiring Diagram ............................................................................................................................ 12
8-6. Insulation Tests ............................................................................................................................ 13
8-7. No-load Current Value ................................................................................................................. 13
9. STANDARD REPAIR TIME (UNIT) SCHEDULES .......................................................................14
Assembly Diagram for PDA-100G
Assembly Diagram for G 10SK2
--- 1 ---
1. PRODUCT NAME
Hitachi Disc Grinder, Model PDA-100G [100 mm (4")]
G 10SK2 [100 mm (4")]
2. MARKETING OBJECTIVE
The conventional Models PDA-100D/G 10SB1 have obtained high evaluation as sturdy, durable, powerful and
reasonable thanks to the strong aluminum body in the Southeast Asian market. In addition, the conventional
Model G 10SK has been sold as a small-diameter grip double-insulated model to complement the single-insulated
Models PDA-100D/G 10SB1. However, recent Southeast Asian market is fiercely competitive due to a price war
and various "double-insulated" and "small-diameter grip" products are penetrating the market posing a challenge
to Hitachi's share. To address the severe situation, we have developed a new disc grinder Model PDA-100G
equipped with the class-first double-insulated aluminum housing and a new disc grinder Model G 10SK2 equipped
with the resin housing.
High power input: 705 W
PDA-100D: 620 W
G 10SB1 : 530 W
G 10SK : 580 W
B : 670 W
C : 540 W
Easy-to-use snap switch
After redesign
PDA-100G
G 10SK2
Before redesign
PDA-100D, G 10SB1
G 10SK
3. APPLICATIONS
Removal of casting fin and finishing of various types of steel, bronze, aluminum, and other metallic materials
and castings
Grinding of welded sections, or sections cut by acetylene torch
Grinding of slate, brick, marble and similar materials
4. SELLING POINTS
Please expand the sales of the Models PDA-100G and G 10SK2 as new products of the 100-mm disc grinder
series. Owing to the sales start of these models, the sales of the conventional Models PDA-100D and G 10SK
are discontinued.
Smaller-diameter grip
Class-first double-insulated aluminum housing
(Model PDA-100G only)
Resistance (heat and strength):
Equivalent to an aluminum housing
Insulation: Equivalent to a mold housing
Durable gear ass'y
(Oil-impregnated sintered gear)
Low noise
(Gears are meshed with play.)
Durable motor
Extended armature wedge
Vent is resistant to sucking gravel.
Maximum output: 900 W
PDA-100D: 710 W
G 10SB1: 560 W
G 10SK: 800 W
B: 750 W
C: 745 W
--- 2 ---
Class-first double-insulated aluminum housing (Model PDA-100G only)
Injection molding is partially conducted on the conventional aluminum die-cast housing to make the aluminum
housing double-insulated. Thus the Model PDA-100G offers high insulation and light weight that are
advantages of a mold housing as well as resistance against heat and external force that is an advantage of an
aluminum housing. The Model PDA-100G causes no melting in the ball bearing chamber that is a weak point
of the mold housing thanks to the new housing construction and the service life of the housing is longer than
the conventional model.
Maker
B
HITACHI
Model
PDA-100G
187
Perimeter of grip* mm 191
G 10SK
176
G 10SK2
176
PDA-100D
200
C
195
P
Small-diameter grip
The Models PDA-100G and G 10SK2 are equipped with a small-diameter grip that is common to the wellÂreputed conventional models. The Model PDA-100G offers higher operability than the conventional Model
PDA-100D and the Model G 10SK2 offers operability equivalent to the conventional Model G 10SK.
In addition, the Models PDA-100G and G 10SK2 are lightweight and offer less user fatigue even though they
are used for a long time.
* Perimeter of grip is the dimension "P" shown below.
Aluminum
Mold
Aluminum
Mold
--- 3 ---
Durable motor
The Models PDA-100G and G 10SK2 are equipped with a motor whose durability is greater than the
conventional models by making the following improvements. The service life of the armature coil is 2 times
longer than the conventional models as a result of the gravel suction test (gravel is forcedly sucked in through
the vents of the tail cover).
(1) The wedges at both ends of the armature coil are extended by 3 to 4.5 mm to protect the portions where
the peripheral speed is the fastest and apt to be disconnected by dust or gravel.
Maker
B
HITACHI
Model
PDA-100G
705
900
1.55
581
670
760
1.40
543
G 10SK
580
820
1.34
612
G 10SK2
705
900
1.39
647
PDA-100D
620
800
1.95
410
C
540
770
1.48
520
3 mm to 4.5mm
3 mm to 4.5mm
Wedge
High power input and maximum power output
The Models PDA-100G and G 10SK2 are compact and lightweight, but powerful and offer higher power input
than the conventional Models PDA-100D and G 10SK thanks to the high-power motor. It is said that the
greater the maximum power output/weight is, the better performance the motor offers. Table 1 shows a
comparison of the motor performance. It is clear that the Models PDA-100G and G 10SK2 have higher
performance than the conventional Models PDA-100D and G 10SK respectively.
* Actual weight excludes cord, depressed center wheel, wheel nut, wheel washer and wheel guard.
Models PDA-100G and G 10SK2
(Dust or gravel is hard to be sucked in.)
Models PDA-100D and G 10SK
2
3
3
2
New vent construction is adopted to prevent dust or gravel from getting inside.
(Comparison of vent construction)
Max. power output W
Weight* (actual)
Max. power output/weight
kg
W/kg
Power input W
--- 4 ---
Durable gear ass'y
The service life of the gear ass'y is 2 times longer than the conventional models thanks to the new greasing
method; vacuum-impregnation of lubricate grease into the holes on the sintered gear, in addition to the
conventional greasing.
Low gear noise
The gear festening method is changed from the conventional press-fitting method to the new method. The
gear is fastened to the spindle by a woodruff key keeping a proper clearance to reduce the variations in gear
noise level to the minimum level.
Depressed
center
wheel
5. SPECIFICATIONS
4,300 m/min (14,100 ft/min, 72 m/s)
Dimensions
Model
Item
O.D. 100 mm (4") x Thickness 6 mm (1/4")
x I.D. 16 mm (5/8")
Offset amount: 4 mm (5/32")
Max. peripheral speed
PDA-100G
AC single phase 50 or 60 Hz
Power source
Glassfiber reinforced polyamide resin (black)
Aluminum alloy die casting (metallic silver)
Aluminum alloy die casting
1.5 kg (3.3 lbs.) 1.4 kg (3.1 lbs.)
2.5 kg (5.5 lbs.) 2.4 kg (5.3 lbs.)
Corrugated cardboard box
Rotation speed (no-load)
Type of motor
Type of switch
Enclosure
Net: *
1
Gross:
Packaging
Standard accessories*
2
Depressed center wheel [Outer dia.100 mm (4") ] ................. 1
Wrench ................................................................................... 1
Voltage, current and power input
12,000/min
AC single-phase commutator motor
Snap switch
Housing
Tail cover
Gear cover
Packing gland
Voltage (V)
110
220
230
240
Current (A)
6.7
3.3
3.2
3.1
Power input (W)
705
*1 : Net weight excludes cord, depressed center wheel, wheel nut, wheel washer and wheel guard.
*2 : Standard accessories are subject to change without prior notice.
G 10SK2
Aluminum alloy die casting (metallic
silver) and glassfiber reinforced
polyamide resin (green)
Glassfiber reinforced polyamide
resin (green)
Weight
--- 5 ---
Maker
Model
Wheel diameter mm
No-load speed /min
Power input W
Power output W
Max. power output W
Lmm
Dimensions W mm
Hmm
Pmm
Weight * Catalog kg
Actual kg
Type of switch
HITACHI
PDA-100G
100
12,000
705
440
900
258
72
63
187
1.5
1.6
Snap
6. COMPARISONS WITH SIMILAR PRODUCTS
6-1. Specification Comparisons
G 10SK
100
12,000
580
330
820
254
67
60
176
1.4
1.4
Snap
100
11,000
540
250
770
256
81
70
195
1.4
1.5
Slide
C
L
H
W
P: Perimeter
* Weight excludes cord, depressed center wheel, wheel nut, wheel washer and wheel guard.
100
11,000
670
360
760
265
76
73
191
1.4
1.4
Slide
G 10SK2
100
12,000
705
440
900
258
72
63
176
1.4
1.4
Snap
PDA-100D
100
12,000
620
410
800
254
67
60
200
1.7
2.0
Snap
B
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