EN
- Overview
- Main Parameters
- Recommended Products
- Workpiece material and grade
- Part drawing, overall dimensions and weight
- Hole diameter, drilling depth and workpiece thickness
- Hole quantity, pattern and spacing
- Required diameter and positional tolerances
- Required production output or cycle time
- Fixture, flushing and automation requirements
- Destination country and available voltage and frequency
DD703 Machine Overview
The DD703 is a CNC EDM drilling machine in HarsMarg’s three-axis product range. Its published configuration includes a 450 × 350 mm worktable, 350 × 450 mm X/Y travel, a 360 mm servo stroke and a maximum workpiece load of 200 kg. The listed maximum drilling thickness is 300 mm.
The machine has a listed electrode-diameter range of φ0.3–φ3.0 mm, a spindle speed of 220 rpm and a minimum table increment of 0.001 mm. Additional listed data include a 25 L working-fluid tank, 10 MPa pressure and power consumption of no more than 3 kVA. Its machine size is 1,400 × 1,700 × 2,000 mm. Actual drilling capability, tolerance, surface condition and cycle time depend on the material, hole geometry, electrode, flushing conditions and process settings.
Model Selection Guidance
Choose the DD703 when your application requires its published 350 × 450 mm X/Y travel, 450 × 350 mm worktable, 200 kg load capacity, 360 mm servo stroke or drilling thickness up to 300 mm. Consider the D703 when its 300 × 400 mm X/Y travel, 480 × 360 mm table and 330 mm spindle servo stroke meet the application. Final model selection should be based on hole diameter and depth, material, tolerances, production target and required machine configuration.
Information Required for a Technical Quote
Explore the complete EDM drilling machine range or compare the D703.
1. Main Technical Specifications of the Machine
Product Model: DD703 CNC EDM Drilling Machine
| Technical parameter | |
| Machine model | DD703 |
| Worktable Size | 450 × 350 mm |
| Maximum load capacity | 200kg |
| Electrode servo stroke | 360mm |
| Maximum drilling thickness | 300mm |
| Spindle rotating speed | 220rpm |
| X/Y Travel | 350 × 450 mm |
| Distance Between Worktable and Electrode Guide | 300mm |
| Power supply | 380 VAC, 50 Hz |
| Minimum Table Increment | 0.001mm |
| Capacity of working tank | 25L |
| Max. pressure of working fluid | 10 MPa |
| Machine weight | Varies by machine dimensions and configuration; confirm with the final technical quotation. |
| Machine Dimensions | 1,400 × 1,700 × 2,000 mm |
| Electrode diameter | φ0.3–φ3.0 mm |
| Power Requirement | ≤3 kVA |
2. Documentation Supplied with the Machine
| Item | Specification | Quantity |
| User Manual (Mechanical Section) | Technical Document | 1 copy |
| Packing List | — | 1 sheet |
| Certificate of Conformity | — | 1 copy |
3. After-sales Service Terms
✦ From the date of delivery, the supplier shall provide a one-year warranty for the mechanical components. Under normal operating conditions, the supplier will be responsible for free repair and replacement of parts. However, wear parts, consumables, and tools are not covered by the warranty.
✦ After the one-year warranty period, the supplier will continue to provide necessary spare parts and offer maintenance services at a reasonable cost.
4. Training
The supplier shall provide 1–2 days of on-site operation training free of charge for 1–2 technical personnel from the customer.
| No. | Module | Training Content |
| 1 | Programming | Guidance on programming |
| 2 | Operation | - Introduction to machine structure, startup procedures, and control panel functions - Explanation on program calling and operation procedures - Key operation precautions |
| 3 | Mechanical Maintenance | 1) Introduction to mechanical structure: • X, Y and Z axis structures • Hydraulic and lubrication system structure 2) Common mechanical failures and maintenance |
| 4 | Electrical Maintenance | 1) Introduction to common electrical components and symbols 2) Basic electrical knowledge 3) Explanation of electrical control diagrams 4) Troubleshooting common electrical faults |
| 5 | Testing | Operation testing |
5. Description of Key Components
| Component | Origin (Manufacturer) | Remarks |
| Control System | Domestic | — |
| Mechanical Parts | ||
| Castings | Domestic | HT250 resin sand casting |
| Ball Screw Assembly | Domestic | P3 grade |
| Guideways | Wear-resistant cast iron guideways | — |
| Bearings | Harbin, China | P5 grade |
| NSK, Japan | — | |
| Electrical Parts | ||
| AC Contactor | Siemens | — |
| Relay | Omron | — |
| High-frequency Power Transistor | Imported from Japan | — |
| Transformer | Wuxi | — |
| Stepper Motor | Changzhou Songya | — |
| Others | Japan, Taiwan, Joint Ventures | — |
6. Standard Accessories
| Item | Specification | Quantity | Remarks |
| High-Pressure Pump | — | 1 set | Includes filter |
| Water Bucket | — | 2 pcs | |
| Leveling Pad | — | 4 pcs | |
| Fixture | — | 1 set | |
| Pressure Plate | — | 2 pcs | |
| T-slot Nut | M8 | 4 pcs | |
| Hex Nut | M8 | 4 pcs | |
| Fixing Studs | 75mm, 110mm, 140mm | 2 pcs each | |
| Electrode Sealing Rings | — | 1 bag | |
| Guide Bush | φ0.5, φ1.0 | 1 pc each | |
| Electrode | 0.5mm | 5 pcs | |
| Electrode | 1.0mm | 5 pcs | |
| Waterproof Cover (Table) | — | 1 set | |
| Timing Belt | 112MXL | 1 pc | |
| Timing Belt | 100MXL | 1 pc | |
| Allen Wrench | 4mm, 5mm | 1 pc each | |
| Drill Chuck & Key | — | 1 set | |
| Centering Bar | — | 1 pc |
