4-stands-850mm-tandem-mill
Detailed Equipment Introduction: 4-Stand 850mm Tandem Cold Rolling Mill
1. General Overview
This 4-Stand 850mm Tandem Cold Rolling Mill, manufactured in 2013 by Beijing Antai, is a modern, high-precision continuous rolling solution featuring a unique hybrid roll configuration. Production ceased in 2025, indicating very recent operation and minimal idle time, with equipment in excellent condition. The mill is supplied by Keepwin Industry with comprehensive support services.
2. Key Technical Specifications
| Category | Parameter | Specification |
|---|---|---|
| General Information | Manufacturer | Beijing Antai |
| Manufacturing Date | 2013 | |
| Production Ceased | 2025 (very recent operation) | |
| Mill Type | Tandem Cold Rolling Mill | |
| Number of Stands | 4 | |
| Stand Configuration | Stand 1 | 4-High |
| Stands 2, 3, 4 | 6-High | |
| Power and Drive | Main Motor Power | 900 kW per stand |
| Number of Motors | 4 | |
| Total Installed Power | 3,600 kW | |
| Product Dimensions | Max. Entry Thickness | 3.0 mm (designed) |
| Actual Entry Thickness | 2.5 mm (proven) | |
| Min. Finished Thickness | 0.3 mm (designed and proven) | |
| Strip Width | 750 mm | |
| Performance | Max. Rolling Speed | 360 m/min |
| Screw-down System | Hydraulic AGC (all stands) | |
| Rolled Materials | Designed Materials | Mild Steel (MS) |
| Control System | Electrical Control | Requires replacement |
| Spare Parts | Spare Parts Included | 1 operational set + 1 complete standby stand |
3. Unique Hybrid Configuration
| Stand | Configuration | Advantage |
|---|---|---|
| Stand 1 | 4-High | Optimal for initial breakdown reduction with high efficiency |
| Stand 2 | 6-High | Superior strip shape control |
| Stand 3 | 6-High | Enhanced precision for intermediate reduction |
| Stand 4 | 6-High | Excellent finishing control for final gauge and flatness |
This hybrid design combines the robust reduction capability of a 4-high stand with the superior shape control of 6-high stands, delivering exceptional product quality.
4. Key Advantages
| Feature | Benefit |
|---|---|
| 2013 Manufacture | Modern design with contemporary technology |
| Production Ceased 2025 | Very recent operation – minimal idle time, excellent condition |
| Hybrid 4-Hi/6-Hi Configuration | Optimal balance of reduction and shape control |
| Hydraulic AGC on All Stands | Precision thickness control across entire strip |
| 360 m/min Rolling Speed | High productivity |
| 0.3mm Minimum Thickness | Capability for thin-gauge products |
| Complete Spare Stand Included | Significant value, reduced future downtime |
| Operational Spare Parts Set | Immediate maintenance readiness |
5. Spare Parts Package
| Item | Description |
|---|---|
| Operational Spare Parts | One complete set for routine maintenance |
| Complete Standby Stand | One fully assembled stand (including rolls, chocks, housings) – ready for immediate installation |
| Value | Substantial reduction in future procurement costs and downtime |
6. Equipment Status
| Component | Status | Implication |
|---|---|---|
| Mechanical Equipment | Excellent (operated until 2025) | Very low wear, long remaining life |
| Electrical Control System | Requires replacement | Opportunity for modern automation upgrade |
| Spare Parts | Extensive included | Reduced future costs, immediate availability |
7. Support Services Available
| Service | Availability |
|---|---|
| Disassembly Services | Available (cost to be confirmed) |
| Refurbishment Services | Available (cost to be confirmed) |
| Installation Support | Available |
| Electrical Upgrade Support | Available |
8. Summary
This 4-Stand 850mm Tandem Cold Rolling Mill offers a rare combination of features:
Manufactured 2013 by Beijing Antai (reputable manufacturer)
Operated until 2025 – very recent use, excellent mechanical condition
Hybrid 4-Hi/6-Hi configuration – optimal for quality production
3.0mm to 0.3mm capability at 750mm width
360 m/min rolling speed with hydraulic AGC
Includes complete spare standby stand – exceptional value
Electrical system requires replacement – opportunity for modernization
This mill represents an excellent opportunity to acquire a recently operated, high-precision tandem mill with extensive spares, ready for relocation and modernization.
