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Hitachi CM 4ST Technical Data And Service Manual

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PRODUCT NAME
Hitachi 4" Cutter
CM 4ST
Model
MARKETING OBJECTIVE
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 rubber
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.
APPLICATIONS
• Cutting and scribing of concrete, stone brick, tile, and similar materials
SELLING POINTS
[NEW FEATURES]
Powerful Motor
[SAME FEATURES AS THE CONVENTIONAL MODELS]
Dust-proof Switch
Low vibration and noise
Compact body
Smart gear cover and base
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
LIST No.
CM 4ST: E725
Aug. 2010
International Sales Division
C

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  Summary of Contents for Hitachi CM 4ST

  • Page 1 MARKETING OBJECTIVE 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 rubber cover over the switch trigger section and lock button prevents the entry of dust, thus improving durability.
  • Page 2 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:...
  • Page 3: Table Of Contents

    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...
  • Page 4: Selling Points

    SELLING POINT DESCRIPTIONS SELLING POINTS 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. HITACHI CM 4ST 1.15 1.40 Torque (N • <Comparison of motor performance>...
  • Page 5 <Vibration and noise with no load (ø110 mm rim type with diamond wheel attached> Maker HITACHI Model CM 4ST Item Noise with no load Vibration with no load Compact body The compact body improves operability compared with the conventional model.
  • Page 6: Specifications

    SPECIFICATIONS SPECIFICATIONS 1. Specifications Model CM 4ST Item Max. cutting depth Capacity 34 mm (for 110 mm diamond wheel) 31.5 mm (for 105 mm diamond wheel) Max. diameter Diamond wheel size 110 mm external dia. x 1 mm thickness x 20 mm internal dia.
  • Page 7: Comparison With Similar Products

    COMPARISON WITH SIMILAR PRODUCTS 1. Comparison of Specifications (Superior specifications: Maker HITACHI Model CM 4ST CM 4SB2 Item Diamond wheel dia. 110 (4-3/8”) 110 (4-3/8”) 110 (4-3/8”) Max. cutting depth 34 (1-3/8”) 34 (1-3/8”) 34 (1-3/8”) No-load speed 13,000 11,500...
  • Page 8: Precautions On Sales Promotion

    1. Safety Instructions In the interest of promoting the safest and most efficient use of the Model CM 4ST Cutter by all of our customers, it is very important when concluding a sale that the salesperson carefully ensure that the buyer seriously recognizes the importance of the Handling Instructions, and fully understands the precautions listed on the Name Plate or Caution Plate attached to each tool.
  • Page 9 • Single-operation cutting must be restricted to cutting depths of 20 mm or less, at slow feed speed. Cutting at deeper than 20 mm must be done in two or three separate cutting operations. Attempting single- operation cutting at deeper than 20 mm will shorten the service life of the diamond wheel, and could cause motor burnout.
  • Page 10: Repair Guide

    1. Precautions on Disassembly and Reassembly [Bold] numbers in the descriptions below correspond to item numbers in the Parts List and exploded assembly diagram for the Model CM 4ST. Disassembly Note on disassembly: Before starting disassembly, be sure to disconnect the power plug from the power supply.
  • Page 11 4. Disassembly of the armature Fig. 4 Ball Bearing 608VVC2PS2L [9] (Fig. 4) Dust Seal [8] (1) Use a wooden or plastic hammer to gently Armature [47] tap on the end surface of the Housing Woodruff Key 2.5 x 8 [46] Ass’y [16], in order to loosen and remove the Armature [47].
  • Page 12: Wiring Diagram

    Internal Wiring Fig. 6 Switch [14] (1) For products with noise suppressor Noise Suppressor [23] Switch [14] (2) For products without noise suppressor Wiring Diagram Fig. 7 (1) For products with noise suppressor (2) For products without noise suppressor Stator Ass'y [5] Stator Ass'y [5] Switch [14] Switch [14]...
  • Page 13 Insulation Tests Upon completing reassembly after repair, measure the insulation resistance and conduct a dielectric strength test. Insulation resistance: 7 MΩ or more using AC 500 V megohm tester Dielectric strength: AC 4,000 V/1 minute, with no abnormalities (220 V to 240 V) AC 2,500 V/1 minute, with no abnormalities (110 V to 127 V) No-Load Current Value After no-load operation for 30 minutes, the no-load current values should be as follows:...
  • Page 14: Standard Repair Time (Unit) Schedules

    STANDARD REPAIR TIME (UNIT) SCHEDULES Variable MODEL 60 min. Fixed Work Flow Handle Cover CM 4ST Cord Cord Armor Switch Housing Ass'y Stator Ass'y General Assembly Armature Ball Bearing 608VVC2PS2L Ball Bearing 629VVC2PS2L Pinion Gear Cover Spindle And Gear Set...
  • Page 15 LIST NO. E725 CUTTER 2010 · 8 · 16 Model CM 4ST (E1)
  • Page 16 PARTS CM 4ST ITEM ITEM CODE NO. CODE NO. DESCRIPTION REMARKS USED USED 317-758 FAN GUIDE 317-756 O-RING 960-251 HEX. HD. TAPPING SCREW D5 X 65 930-703 BRUSH TERMINAL 340-783C STATOR ASS'Y 110V INCLUD. 4 340-783G STATOR ASS'Y 110V INCLUD. 4 FOR TPE 340-783D STATOR ASS'Y 120V-127V INCLUD.
  • Page 17: Optional Accessories

    PARTS CM 4ST ITEM CODE NO. DESCRIPTION REMARKS USED 600-2VV BALL BEARING 6002VVCMPS2L 333-240 BEARING HOLDER 333-241 SPINDLE AND GEAR SET 606-ZZM BALL BEARING 606ZZC2PS2L 333-126 GEAR COVER 333-242 PINION 629-VVM BALL BEARING 629VVC2PS2L 318-647 RUBBER RING 958-915 WASHER (A) 940-220 WOODRUFF KEY 2.5 X 8...
  • Page 18 CM 4ST ITEM CODE NO. DESCRIPTION REMARKS USED - 4 - Printed in Japan 8 - 10 *ALTERNATIVE PARTS (100816N)