±2 μm gauge. 1200 m/min. 3000 kN.
Four-High two-stand tandem cold rolling for carbon steel, stainless, aluminum and copper. One integrated line — uncoiler, tandem stands, hydraulic AGC, recoiler — engineered in-house and installed in 40+ countries.
- Mill type
- 4Hi Tandem
- Thickness tol.
- ±2 μm
- Max speed
- 1200 m/min
- Rolling force
- 3000 kN
- Strip thickness
- 0.12–6 mm
- Width
- 400–2100 mm
- Control
- Siemens 840D
- Certification
- CE · ISO 9001
Response within 24 hours · Layout drawing supplied before manufacturing
Four engineering decisions that define the mill
4-High rigidity, hydraulic AGC, tandem reduction and CNC integration are designed, built and tested as one system.
Small work rolls, large backup rolls
Minimal roll deflection for excellent gauge accuracy and strip shape at high reduction rates.
Sub-30 ms response · ±2 μm
Automatic Gauge Control via hydraulic screwdown with force feedforward and closed-loop feedback.
Two stands, progressive reduction
Higher throughput, better mechanical properties and superior surface finish versus single-stand reversing.
Siemens 840D · full compensation
Roll bending, thermal compensation and recipe management — Industry 4.0 ready from day one.
Operating regulations & procedures
Standard TOKO safety and operating protocol — delivered with every mill and covered during commissioning training.
Technical highlights
Each mill is configured to your strip specification — below is the standard TOKO CRM range.
| Mill type | Four-High (4Hi) · two-stand tandem / single stand available |
|---|---|
| Rolling force | Up to 3000 kN per stand |
| Strip thickness | 0.12 – 6.0 mm (carbon, stainless, Al, Cu) |
| Width range | 400 – 2100 mm |
| Thickness tolerance | ±2 μm (hydraulic AGC, closed loop) |
| Max rolling speed | 1200 m/min |
| Work roll dia. | Ø150 – 600 mm |
| Backup roll dia. | Ø600 – 1400 mm |
| Drive power | 500 – 3000 kW AC / DC |
| Control system | Siemens 840D / Mitsubishi CNC with full AGC |
| Certification | CE marked · full safety compliance |
Materials processed
Where the mill runs
Thin-gauge strip with precise gauge and surface quality for production environments where tolerance is not negotiable.
Built to be verified, not just claimed
Procurement teams verify. Every trust element below is concrete, checkable and tied to the CRM you are evaluating.
±3 μm across 2000 mm
"TOKO's 4Hi tandem mill gives us ±3μm consistency across 2000mm width." — Production Director, JSW Steel
ISO 9001:2015 · CE
Full safety compliance. Certification documents and CE declaration available for verification during evaluation.
24 h engineering response
Remote diagnostics standard. Spare parts stocked for 10+ years. Commissioning and operator training by TOKO engineers.
Specification questions
Answers engineers and procurement teams ask before requesting a mill configuration.
What materials can the TOKO cold rolling mill process?
What is the thickness tolerance and maximum rolling speed?
Is the mill available in single-stand or tandem configuration?
What control system is used?
Send your strip data. Get a mill configuration.
A TOKO rolling mill engineer will review your entry gauge, exit gauge, strip width and target speed — and return a mill configuration, layout drawing and budget price, usually within 24 hours.