Used RWF John Cockerill 4-Hi Reversing Cold Rolling Mill | Galaxie Corporation, Wayne, Michigan, USA

This used RWF (John Cockerill) 4-Hi reversing cold rolling mill is available from Galaxie Corporation. It cold rolls strip in both directions between a payoff and a tension reel.

It handles pickled hot rolled, low carbon steel strip 250–400 mm wide and 0.30–4 mm thick, with a rolling speed of 500 m/min, a 700 kW stand drive and a maximum roll separating force of 450 tons.

Key Features

• Mechanical AGC (automatic gauge control) system, filtration system and electronics upgraded in 2020
• Two brand new MOOG servo valves fitted in 2023
• Electrical system by Control Technique
• Supplied with hydraulics, electrics, controls and spare work and back-up rolls
• Emulsion coolant system with spray and temperature figures listed

Technical Specifications

• Manufacturer: RWF (John Cockerill)
• Type: 4-Hi reversing cold rolling mill
• Material: Pickled hot rolled, low carbon steel, UTS 550 N/mm² maximum
• Strip width: 250–400 mm
• Strip thickness: 0.30–4 mm
• Coil inside diameter: 508–610 mm
• Coil outside diameter: 1,800 mm maximum
• Coil weight: 9 t maximum
• Rolling speed: 500 m/min
• Rewinding speed: 500 m/min
• Stand drive: 700 kW
• Tension reel drive: 250 kW
• Payoff motor: 4 kW
• Reel tension: 3,000 kg maximum
• Roll separating force: 450 tons maximum
• Work roll diameter: Ø140–175 mm
• Back-up roll diameter: Ø380–420 mm
• Bottom back-up roll: Ø1,202–1,326 mm, 1,320 mm barrel
• Coolant: Emulsion, 2.5–3.5% oil
• Coolant flow: 1,500 l/min maximum
• Spray pressure: 5 bar maximum
• Coolant temperature: 45–55 °C
• Monthly production: 2,500 t
• Average productivity: 4.6 t/hour

Applications

• Cold reduction of low carbon steel strip to thinner gauges
• Producing cold rolled steel coil from pickled hot rolled strip
• Strip for downstream forming, stamping and fabrication

Commercial Details

• Make: RWF (John Cockerill)
• Condition: Used
• Location: Wayne, Michigan, USA
• Seller: Galaxie Corporation

Frequently Asked Questions

• What strip can this mill roll? It rolls pickled hot rolled, low carbon steel strip 250–400 mm wide, from 4 mm down to 0.30 mm thick.
• What is its production rate? Average productivity is 4.6 t/hour, with monthly production of 2,500 t.
• What upgrades has it had? A mechanical AGC system, filtration system and electronics were upgraded in 2020, and two new MOOG servo valves were fitted in 2023.
• What should I ask when enquiring? Ask for photos or video of the mill running, whether the spare work and back-up rolls are included, the condition of the rolls and electrics, and loading and shipping arrangements.