Number of Rolls 4
Rolls length 10’ 2”
Top Roll diameter 18.2” – less deflecting thanks to Planetary Guide Technology
Bottom Roll Diameter 16.6”
Side Rolls diameter 14.2”
Smallest possible diameter 21” thank to planetary guide technology
Rolling Speed 20 ft/min (imperial)
Installed power HP 72 (Energy Saving Technology)
Power Supply V., 60 Hz
Rolls material High resistance, heat treated, tested & certified Carbon Steel
Rolls Hardening Induction surface up to 48 – 62 HR Rockwell C, according to
Customer’s application and rolls materials
Rolls Periph, Speed compensation Automatic (no torque loss, no operator setting needed)
Rolls Crowning Top and lower (clamping) rolls are standard crowned to compensate
Rolls deflection
Rolls guiding Friction-free, mill-scale-proof, lubrication-less planetary guides
Roll position Linear transducer with an accuracy of 0.004”
Type of bearing on rolls Self-aligning heavy duty double crown spherical roller bearings
Servo-Tronic (Davi patent) Two independent but integrated parallel systems to prevent
Rolls parallelism down time in case of electronic bug (virtually never fails)
Rolls rotation Drive (Davi Exclusive) Both Clamping rolls are driven in rotation as standard feature
RE-Rolling drive system High speed top roll rotation during re-rolling as standard feature
Transmission drive (Davi Exclusive) Stress-less transmission” both hydro-motors are free to tilt to
Absorb the rolls deflection and for cone rolling
Wiring System (Davi Exclusive) Roll-by-wire digital technology: faster, more accurate and reliable
Rolls Tilting for cone bending(Davi Exclusive) More than 4” for easier cone bending, electronically controlled (based on 120” and longer rolls.
Plate Clamping hydraulic pressure Electronically Pre-settable for any thickness
Actuation of yoke & top roll tilting Hydraulic wide opening, for easier remove of closed shapes
Rolls rotation hydraulic brake Included
Multiple overload safety system Included, through multiple check hydraulic valves
Approximate Dimensions 248" x 91" x 95"
Weight 48,504 lbs

Equipped with
New extra roll
Up to 13, 200 lbs capacity, 135" max. Diameter Hydraulic overhead Support
Up to 6,600 lbs fron/rear/ framed support
16.1" crowned for .500" material in A516 Gr 70 with a yield of 50 KSI
and UTS of 70 KSI 0 interchangeable top roll