Water-cooled roll

Flaking heats the roll surface. A ring of holes is drilled under the alloy layer, so cooling water runs just below the face and carries the heat away.

Shown on the FG6100FWC, the same across the series: the 3D and sizes follow the FG6100FWC roll drawing (Ø600 × 1000 mm); the water circuit works the same way on every model. On this machine: roll face 800 mm, cooling pipe inside the roll 1128 mm (piping drawing).

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The whole roll

A roll is the roll body with a stub shaft at each end. The two rolls are alike except for their shaft ends: one is 1870 mm long, with the pulley and the rotary joint at opposite ends; the other is 1775 mm long, with both at the same end. The 3D shows the 1870 mm roll.

Factory requirements (roll drawing)

Roll hardnessHS 68–75
Alloy layer20–30 mm
Shaft materialGrade 45 steel, quenched and tempered, HB 220–260
Pressure test1.2 MPa, held 15 min without leaking
Dynamic balancewithin 300 g, never over 350 g
Maximum speed400 r/min

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Sources: roll drawing (2025), water-route sketch of the roll, piping drawing (2026.10); alloy-layer thickness confirmed by BellaEx (2026.11). The 3D is a schematic drawn to the drawing's sizes.