Hitachi CM 4ST Technical Data And Service Manual
LIST No.
CM 4ST: E725
Aug. 2010
[SAME FEATURES AS THE CONVENTIONAL MODELS]
Dust-proof Switch
Low vibration and noise
Compact body
Smart gear cover and base
The Model CM 4ST is the 4” cutter version of the low-end ST series model based on the CM 4SB.
Overload strength is increased by adopting a powerful motor with maximum output of 1,950 W, while a rubbe
r
cover over the switch trigger section and lock button prevents the entry of dust, thus improving durability.
We are marketing this new 4” cutter with these features to increase market share and expand sales.
PRODUCT NAME
Hitachi 4” Cutter
Model CM 4ST
• Cutting and scribing of concrete, stone brick, tile, and similar materials
MARKETING OBJECTIVE
APPLICATIONS
SELLING POINTS
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
[NEW FEATURES]
Powerful Motor
C
International Sales Division
REMARK:
• For more information about HANDLING INSTRUCTIONS, visit our website at:
http://www.hitachi-koki.com/manual_view_export/
• 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:
Competitors
Symbols Utilized
Company Name Model Name
C MAKITA 4100NHZ
CONTENTS
Page
SELLING POINTS -------------------------------------------------------------------------------------------------------------- 1
SPECIFICATIONS --------------------------------------------------------------------------------------------------------------3
1. Specifications
--------------------------------------------------------------------------------------------------------------------------------- 3
COMPARISON WITH SIMILAR PRODUCTS---------------------------------------------------------------------------- 4
1. Comparison of Specifications --------------------------------------------------------------------------------- 4
PRECAUTIONS ON SALES PROMOTION ------------------------------------------------------------------------------ 5
1. Safety Instructions -----------------------------------------------------------------------------------------------5
REPAIR GUIDE------------------------------------------------------------------------------------------------------------------ 7
1. Precautions on Disassembly and Reassembly ----------------------------------------------------------- 7
STANDARD REPAIR TIME (UNIT) SCHEDULES-------------------------------------------------------------------- 11
Assembly Diagram for CM 4ST
-1-
<Comparison of motor performance>
Maker
Model
Item
HITACHI
CM 4ST
C
Maximum output W 1,950 1,640
Overload strength % 121 100
0
50
100
150
200
250
300
350
100%
121%
HITACHI CM 4ST
1.15 1.40
Torque (N•m)
Stator coil temperature rise (°C)
C
Excellent overload durability
The powerful motor with maximum output of 1,950 W achieves overload durability 1.2 times greater than
that of the conventional model.
Dust-proof switch
Because the switch trigger section and lock button are both covered with rubber, this model is structured to
prevent the entry of dust into the handle that contains the switch and wiring.
SELLING POINT DESCRIPTIONS
SELLING POINTS
<Provision of rubber cover>
Maker
Model
Item
HITACHI
CM 4ST
C
Trigger Provided Provided
Lock Button Provided Not Provided
Trigger
Handle
Lock Button
-2-
<Comparison of size>
Maker
Model
Item
HITACHI
CM 4ST
C
L1 mm 214 228
L2 mm 201 204
L3 mm 38 40
H mm 156 168
L3
L2
L1
H
Low vibration and noise
The rubber between the ball bearing and outer frame on both sides of the armature ensures less vibration
and noise with no load than the conventional model.
<Vibration and noise with no load (ø110 mm rim type with diamond wheel attached>
Maker
Model
Item
HITACHI
CM 4ST
C
Noise with no load m/s
2
2.0 3.7
Vibration with no load dB 87 90
Compact body
The compact body improves operability compared with the conventional model.
Smart gear cover and base
The silver-painted gear cover and glossy coated base enhance product appearance compared with the
conventional model.
<Comparison of product appearance>
Maker
Model
Item
HITACHI
CM 4ST
C
Gear cover Paint finish Shot finish
Base With gloss Without gloss
-3-
1. Specifications
Model
Item
CM 4ST
Capacity
Max. cutting depth
34 mm (for 110 mm diamond wheel)
31.5 mm (for 105 mm diamond wheel)
Diamond wheel size
Max. diameter
110 mm external dia. x 1 mm thickness x 20 mm internal dia.
(Korea only: 15 mm internal dia.)
Type of motor AC single phase commutator motor
Type of switch Trigger switch
Enclosure
• Housing ----------------------------------- Polyamide resin
• Handle cover ---------------------------- Polyamide resin
• Gear cover ------------------------------- Die-cast aluminum alloy
• Base --------------------------------------- Steel
Full-load current and
Power input
Power input 1,300 W
Rotation speed No-load 13,000 min
-1
Net 2.9 kg (6.4 lbs.)
Weight
Gross 3.6 kg (8.0 lbs.)
Packing Corrugated cardboard box
Type Two-core cabtire cable
Cord
Overall length 2.0 m (6.6 ft.)
Standard accessories • Wrench --------------------------------------- 2
Optional accessories
• Water plug
• Rubber adapter
• Vinyl hose
• Diamond wheel
Segment type (for dry cutting) ------ Diameter 105 mm (4”)
Rim type (for wet cutting)------------- Diameter 110 mm (4”)
NOTE: The weight does not include the cord and diamond wheel.
SPECIFICATIONS
Voltage Full-load current Power input
110 V 12.4 A
120 V 11.4 A
127 V 10.8 A
220 V 6.2 A
230 V 5.9 A
240 V 5.7 A
1,300 W
SPECIFICATIONS
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