Mandrel / Uncoiler Drum

Heavy-Duty Uncoiler Mandrels for Continuous Annealing & Processing Lines

• Overview: Engineered to handle heavy-gauge and wide steel coils, our uncoiler mandrels deliver powerful hydraulic expansion and precise torque control. Designed for seamless coiling/uncoiling operations in CAL, CGL, and pickling lines, they resist fatigue under extreme bending loads.

• Key Features:

  • High-strength alloy steel (42CrMo/34CrNiMo6) forged main shaft.

  • Multi-segment wedge expansion mechanism ensures optimal concentricity and gripping force.

  • Integrated hydraulic rotary joints for smooth and leak-free operation.

• Technical Specifications:

  • Coil Inner Diameter: 508mm, 610mm, 762mm

  • Max Load Capacity: Up to 40 Tons

  • Surface Hardness: 55 - 60 HRC (Segment plates)

• Applications: Entry section uncoiling for cold rolling, continuous annealing, and galvanizing lines.