4-High rigidity
Small work rolls supported by large backup rolls — minimal deflection, excellent gauge accuracy and strip shape.
Cold Rolling Mill "CRM" — precision & efficiency
Four-High two-stand tandem cold rolling mill · 4Hi AGC · high rolling forces · excellent surface finish
TOKO design purpose for "Four-high two-stand cold rolling mill" is to achieve high-precision and efficient rolling of metal sheets. It utilises four rollers in each stand to provide stability and control during the rolling process, ensuring accurate thickness and surface quality of the rolled product. The two-stand configuration allows for multiple passes and progressive reduction in thickness, enhancing the overall rolling efficiency. This design is tailored for industrial production, aiming to meet the demands for high-quality metal sheets in various applications.
Core advantages
AGC hydraulic
Automatic Gauge Control via hydraulic screwdown with response under 30 ms, achieving ±2 μm thickness tolerance.
Tandem configuration
Two stands for progressive reduction — higher throughput, better mechanical properties and surface finish.
CNC integration
Siemens 840D with force feedforward, roll bending and thermal compensation — full Industry 4.0 readiness.
📋 Operating regulations & procedures
Standard TOKO safety and operating protocol — delivered with every mill and covered during commissioning training.
- 1Personal Protective Equipment: Wear safety helmets, goggles and protective gloves to minimise injury risk from debris or hot parts.
- 2Work Area Safety: Keep the area clean and organised, free of debris. Avoid loose clothing or jewellery.
- 3Equipment Inspection: Check rollers, lubrication systems, and any damage or deformities before start-up.
- 4Parameter Settings: Adjust rolling force, speed and roll gap according to the process requirements.
- 5Material Handling: Ensure correct positioning of the strip on the feed roller track.
- 6Rolling Operation: Gradually increase pressure and monitor for abnormal sounds or vibrations.
- 7Quality Control: Check thickness, flatness and surface quality after rolling.
- 8Maintenance & Cleanliness: Regular lubrication, wear checks and keeping equipment clean.
- 9Emergency Procedures: Know the emergency stop and safe shutdown procedures.
⚙️ Technical highlights
Each mill is configured to your strip specification — below is the standard TOKO CRM range.
Mill typeFour-High (4Hi), two-stand tandem / single stand available
Rolling forceup to 3000 kN per stand
Strip thickness0.12 – 6.0 mm (carbon, stainless, Al, Cu)
Width range400 – 2100 mm
Max speed1200 m/min
Gauge controlHydraulic AGC, ±2 μm (closed loop)
Work roll dia.Ø150 – 600 mm (depending on material)
Backup roll dia.Ø600 – 1400 mm
Drive power500 – 3000 kW AC / DC
Control systemSiemens 840D / Mitsubishi CNC with full AGC
Materials processed
One mill, many substrates — with recipe switching and roll change procedures engineered for fast turnaround.
Carbon Steel
Stainless 304 / 316
Aluminum
Copper
Brass
Silicon Steel
HSLA
Design focus
Built for 99% uptime and minimal maintenance, with modular assemblies and automated roll change.
- Automatic work-roll change
- Advanced cooling & lubrication systems
- Hydraulic AGC & roll bending
- CE-compliant guarding & interlocks
Applications
Wherever coil needs to become precise, thin-gauge strip with an excellent surface finish.
- Automotive body panels & EV parts
- Electrical steel for transformers
- Packaging & container stock
- Building materials, tubing & precision stampings
Industries we serve
AutomotiveBody & EV panels
Electrical SteelTransformer cores
PackagingContainer stock
ConstructionCladding & profiles
Precision StampingThin-gauge blanks
Rail & TransportStructural strip
Solar & EnergyFrames & structures
White GoodsAppliance panels
Why manufacturers choose TOKO
01
In-house engineering
Mechanical, hydraulic, AGC and CNC design are all done under one roof — so customisation is fast and accountability is clear.
02
Full-line responsibility
Uncoiler, mill stands, AGC hydraulics, lubrication, recoiler and controls are supplied as one integrated, tested line.
03
Global commissioning
Installation, operator training and remote diagnostics delivered by TOKO engineers in 30+ countries.
TOKO machines have been sold to more than 30 countries and regions. Looking forward to establishing a long-term partnership with your esteemed company.
Certifications & quality
ISO 9001:2015
CE Marked
TÜV Inspected
SGS Verified
Frequently asked questions
What materials can the TOKO cold rolling mill process?
Carbon steel, stainless steel (304/316), aluminum, copper, brass, silicon steel and high-strength low-alloy (HSLA) steels.
What is the thickness tolerance and rolling speed?
Thickness tolerance ±2 μm with hydraulic AGC; rolling speed up to 1200 m/min depending on material and gauge.
What control system is used?
Siemens 840D or Mitsubishi CNC with full AGC, roll bending, thermal compensation and remote diagnostics.
Is the mill available in single-stand or tandem configuration?
We offer both single-stand 4Hi and two-stand tandem configurations to match your production requirements.
Can you customise the mill for specific widths or gauges?
Yes. We tailor roll dimensions, rolling force, speed and automation level to your specific strip specifications, and supply layout drawings before manufacturing begins.
Talk to a rolling mill engineer
Send us your strip data and we will return a mill configuration, layout drawing and budget price — usually within 24 hours.
+86 510 8359 7138
📦 Custom service covers coil dimensions, materials, entry/exit gauge, automation level and financing options.