Used Schäfer 3-Roll Round Bending Machine for sale (1,04,038)

Condition: new, bending length: 4100sheet thickness: 25upper roll diameter: 460motor: 22messurements (LxWxH): 7200 x 2500 x 2200 mmweight approx.: 31000sheet length: 4100CY3R-HHS 460-40/25 – 3-Roll Hydraulic Plate Bending Machine Cone bending device for precise bending Induction-hardened rolls for long-lasting durability Digital display on both side rolls Robust machine body made of ST-52 steel construction Separate control panel for convenient operation All rollers mounted on bearings for smooth performance Drop end controlled from the control panel, allowing easy release of bent metal sheets and lifting of the upper rolls Roll movement and parallelism adjustment fully controlled via the control panel All rolls driven by separate hydraulic motors with planetary gearboxes Dsdpjd Ab Spofx Am Tskp CE-compliant, meeting European safety standards

Condition: new, sheet length: 2100sheet thickness: 40prebending: 30Upper Roll Diameter: 390Side Roll: 360motor: 22messurements (LxWxH): 4900 x 1950 x 2200weight approx.: 17000 Technical specifications: - Hardened and polished rolls - Conic bending device - Digital readout for side rolls - Complete body made of ST-52 Steel - Portable control panel separated form machine - Rolls are mounted with bearings - Top roll cover, openable and closeable by hydraulic, controlled from control panel. - All rolls are driven by hydraulic motor and planetary gearbox - Side rolls upwards downwards movements are hydraulic powered Options: - variable rotation speed EURO 3.682.00 Material feed table on request Oil cooler EURO 1,040.00 Center support EURO 11.900,00 Side supports EURO 8.250.00 Dkjdsd Ab Syepfx Am Tsp We have many references!

Condition: new, functionality: fully functional, Year of construction: 2022, machine/vehicle number: 111/52, control type: CNC control, degree of automation: automatic, actuation type: hydraulic, Equipment: documentation/manual, foot remote control, For sale: New/unused Amob MAH 40/3 CNC profile bending machine. We purchased the machine new from Maqfort in 2022. Due to relocation of production and changes in the order profile, we found no use for the machine; it has not even been connected or commissioned. Therefore, it is a brand new machine. Dkjdpsy Hn Uvsfx Am Tsp Equipment: Hydraulically controlled top roller feed / Can be operated in both vertical and horizontal positions / 3 mechanically driven rollers / Manually adjustable side rolls / CNC control / Movable foot pedal includes digital display, 2 pedals, emergency stop button / 3 standard (hardened) tooling rollers. Price: 25,153 euros. In case of sale, Maqfort will provide installation, commissioning and staff training according to agreement.

Condition: new, neu ca. 12 - 14 Wochen ab Auf Türkei 134000 € 2532.6 € 3100 mm 25 mm 25 mm 20 mm 20 mm 20 mm 16 mm 360 mm 360 mm 270 mm 60 mm 1510 mm 22 kW 5560 mm 2060 mm 2050 mm 16750 kg 4 rolls fully hydraulic drive of upper and lower roll (from 30 mm bending capacity all four rolls) by planetary gear box hydr. side rolls positioning with electronical synchronisation Dodpsypbqusfx Am Tekp hydr. lower roll feed with mechanical synchronisation adjustable pinching pressure variable rolling speed hardened rolls conical bending device hydraulic drop-end bearing moveable control panel overload protection user manual in GERMAN or ENGLISH according to CE rules OPTIONAL: NC control upper and lateral supports IMPORTANT ISSUES AT CONICAL BENDING: the max. sheet metal thickness isequivalent to 50 % of nominal capacity

Condition: new, neu ca. 12 - 14 Wochen ab Auf Türkei 70300 € 1328.67 € 3100 mm 8 mm 8 mm 6 mm 6 mm 5 mm 240 mm 240 mm 190 mm 825 mm 11 kW 4880 mm 1160 mm 1200 mm 6450 kg 4 rolls fully hydraulic drive of upper and lower roll (from 30 mm bending capacity all four rolls) by planetary gear box hydr. side rolls positioning with electronical synchronisation hydr. lower roll feed with mechanical synchronisation Djdpfx Amjypbqns Tjkp adjustable pinching pressure variable rolling speed hardened rolls conical bending device hydraulic drop-end bearing moveable control panel overload protection user manual in GERMAN or ENGLISH according to CE rules OPTIONAL: NC control upper and lateral supports IMPORTANT ISSUES AT CONICAL BENDING: the max. sheet metal thickness isequivalent to 50 % of nominal capacity the cone length can be max. 30 % oremust be more than 60 % of roll length hardened rolls are recommended

Condition: new, neu Dksdpfx Amoypbqhs Top ca. 12 - 14 Wochen ab Auf Türkei 95000 € 1795.5 € 3100 mm 13 mm 12 mm 8 mm 13 mm 10 mm 10 mm 8 mm 270 mm 270 mm 230 mm 50 mm 1155 mm 15 kW 5310 mm 1660 mm 1590 mm 10050 kg 4 rolls fully hydraulic drive of upper and lower roll (from 30 mm bending capacity all four rolls) by planetary gear box hydr. side rolls positioning with electronical synchronisation hydr. lower roll feed with mechanical synchronisation adjustable pinching pressure variable rolling speed hardened rolls conical bending device hydraulic drop-end bearing moveable control panel overload protection user manual in GERMAN or ENGLISH according to CE rules OPTIONAL: NC control upper and lateral supports IMPORTANT ISSUES AT CONICAL BENDING: the max. sheet metal thickness isequivalent to 50 % of nominal capacity

Condition: new, neu ca. 12 - 14 Wochen ab Auf Türkei 62600 € 1183.14 € 2050 mm 13 mm 10 mm 13 mm 10 mm 10 mm 8 mm 240 mm 240 mm 190 mm 820 mm 11 kW 3830 mm 1160 mm 1200 mm 5000 kg 4 rolls fully hydraulic drive of upper and lower roll (from 30 mm bending capacity all four rolls) by planetary gear box hydr. side rolls positioning with electronical synchronisation hydr. lower roll feed with mechanical synchronisation adjustable pinching pressure Dodpfoypbqbex Am Tjkp variable rolling speed hardened rolls conical bending device hydraulic drop-end bearing moveable control panel overload protection user manual in GERMAN or ENGLISH according to CE rules OPTIONAL: NC control upper and lateral supports IMPORTANT ISSUES AT CONICAL BENDING: the max. sheet metal thickness isequivalent to 50 % of nominal capacity

Condition: new, neu ca. 2 Wochen ab Auftragse Italien 2000 mm 11 mm 11 mm 7 mm 8 mm 6.4 mm 225 mm 215 mm 165 mm 8 m/min 3950 mm 1200 mm 1200 mm 4450 kg Hardened and polished rollers Numerical control Siemens PGS-Classic with touchscreen Cone bending with electronic control and inclination of the bottom roller oil cooler Simultaneous rotation and roller movement Simultaneous roller and support movement Possibility to bend variable radii (ovals, ellipses, etc.) Hydraulic micro-positioning by the PLC for higher accuracy Infinitely variable speed for roller movement Infinitely variable speed for rotation Prepared for retrofitting supports (up to 5 axes) Prepared for retrofitting loading/unloading stations Prepared for retrofitting CNC controls Extra large, double hinged drop end Electronic parallelism system for the synchronization of the rollers Hydraulic lifting of the top roll (for models with a top roll diameter of 205 mm or more) Double linear guide for the movement of the lower rolls Ultra wide rolls blocks "MCS" bearing system for the lower rolls (4 large bearings on each shaft) Central lubrication system Pressure manometer for constant pinch roll control Extra torque and special braking system Safety cord with emergency stop Equipped according to "CE" regulations OPTION: Dkjdpfx Amsypbp Rs Tjp CNC control Siemens PSG-Absolute with 15" touch screen (automatic calculation of the process for simple and complex shapes)

Condition: new, neu ca. 12 - 14 Wochen ab Auf Türkei 83800 € 1583.82 € 2550 mm 15 mm 15 mm 13 mm 12 mm 12 mm 10 mm 270 mm 270 mm 230 mm 50 mm 1155 mm 15 kW 4760 mm 1660 mm 1155 mm 8950 kg 4 rolls fully hydraulic drive of upper and lower roll (from 30 mm bending capacity all four rolls) by planetary gear box hydr. side rolls positioning with electronical synchronisation hydr. lower roll feed with mechanical synchronisation adjustable pinching pressure variable rolling speed hardened rolls conical bending device hydraulic drop-end bearing moveable control panel overload protection user manual in GERMAN or ENGLISH according to CE rules OPTIONAL: NC control upper and lateral supports IMPORTANT ISSUES AT CONICAL BENDING: the max. sheet metal thickness isequivalent to 50 % of nominal capacity the cone length can be max. 30 % oremust be more than 60 % of roll length hardened rolls are recommended Djdpfx Amsypbp De Tokp

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 55900 € 1056.51 € 3100 mm 9 mm 8 mm 7 mm 7 mm 5 mm 245 mm 245 mm 180 mm Dsdpfxeyb Sz Io Am Tjkp 1,5 / 6 m/min 7.5 kW 5350 mm 1600 mm 1470 mm 6850 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 48100 € Dkedpfx Aeyb Sywjm Tjp 918.71 € 2550 mm 9 mm 9 mm 7 mm 7 mm 5 mm 220 mm 220 mm 160 mm 1,5 / 6 m/min 5.5 kW 4900 mm 1150 mm 1250 mm 4600 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 49900 € 953.09 € 2050 mm 13 mm 13 mm 10 mm 10 mm 8 mm 245 mm 245 mm 180 mm 1,5 / 6 m/min 7.5 kW 4300 mm 1600 mm 1470 mm 5450 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Dkjdpfx Amjyb Sydj Top Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 31600 € 603.56 € 2050 mm 6 mm 6 mm 4 mm 4 mm 3 mm 150 mm 150 mm 130 mm 1,5 / 6 m/min 4 kW 4250 mm 960 mm 1100 mm 2800 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules Dkedpfxoyb Szbe Am Tsp OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 57000 € 1077.3 € 2550 mm 13 mm 13 mm 10 mm 10 mm 8 mm 260 mm 260 mm 200 mm 1,5 / 6 m/min 7.5 kW 4800 mm 1600 mm 1550 mm 6800 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Djdpfoyb Sy Rsx Am Tekp Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 46300 € 884.33 € 2050 mm 11 mm 11 mm 9 mm 9 mm 7 mm 220 mm 220 mm 160 mm 1,5 / 6 m/min 5.5 kW 4400 mm Dkedpfx Ajyb Szuom Tsp 1150 mm 1250 mm 4080 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 12 Wochen ab Auftrags Türkei 25200 € 481.32 € 1050 mm 2.5 mm 2.5 mm 2 mm 90 mm 4,5 m/min 2.2 kW 2250 mm 1000 mm 1500 mm 900 kg FOR ROUND AND ELEPTIC SHAPES FOR MASS PRODUCTION (CYCLE UP TO ONLY 20 SEC POSSIBLE) 4 rolls NC control with touchscreen Top roll driven by hydromotor and plantary gearbox Hydraulic drop end Djdjyb Syqjpfx Am Tjkp Mobile control panel Hardened rolls Operating manual in English or German OPTION: Feeding table price on request

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 52700 € 996.03 € 2550 mm 10 mm 10 mm 8 mm 8 mm 6 mm 245 mm 245 mm 180 mm 1,5 / 6 m/min 7.5 kW 4800 mm 1600 mm 1470 mm 6170 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules Dkodeyb Sykspfx Am Top OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 12 - 14 Wochen ab Auf Türkei 98600 € 1863.54 € 3100 mm 16 mm 16 mm 13 mm 16 mm 14 mm 12 mm 300 mm 300 mm 240 mm 50 mm 1140 mm 18.5 kW 5310 mm 1660 mm Dedpfx Amsynm Hfo Tjkp 1140 mm 11100 kg 4 rolls fully hydraulic drive of upper and lower roll (from 30 mm bending capacity all four rolls) by planetary gear box hydr. side rolls positioning with electronical synchronisation hydr. lower roll feed with mechanical synchronisation adjustable pinching pressure variable rolling speed hardened rolls conical bending device hydraulic drop-end bearing moveable control panel overload protection user manual in GERMAN or ENGLISH according to CE rules OPTIONAL: NC control upper and lateral supports IMPORTANT ISSUES AT CONICAL BENDING: the max. sheet metal thickness isequivalent to 50 % of nominal capacity

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 103100 € 1948.59 € 2550 mm 25 mm 25 mm 20 mm 20 mm 16 mm 350 mm 350 mm 260 mm 1,5-5 m/min 22 kW 5500 mm 2000 mm 1900 mm 13000 kg 4 rolls fullhydraulic drive of upper roll and lower roll hydraulic infeed of lower and side roll digital read-out of lower and side rolls position hardened rolls conical bending device hydraulic load relieving of upper roll hydraulic drop-end bearing 2 working speeds central lubrication system protectionagainst overload moveable control pane according to CE rules OPTIONAL EQUIPMENT: infinitely adustable speed of rolls hydraulic side support hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: the max. sheet metal thickness isequivalent to 50 % of nominal capacity the cone length can be max. 30 % oremust be more than 60 % of roll length Dkedjynm Euepfx Am Tep hardened rolls are recommended

Condition: new, neu ca. 12 Wochen ab Auftrags Dksdpfxjynm Ens Am Tsp Türkei 97400 € 1840.86 € 2050 mm 30 mm 30 mm 25 mm 25 mm 20 mm 350 mm 350 mm 260 mm 1,5-5 m/min 22 kW 5000 mm 2000 mm 1900 mm 11000 kg 4 rolls fullhydraulic drive of upper roll and lower roll hydraulic infeed of lower and side roll digital read-out of lower and side rolls position hardened rolls conical bending device hydraulic load relieving of upper roll hydraulic drop-end bearing 2 working speeds central lubrication system protectionagainst overload moveable control pane according to CE rules OPTIONAL EQUIPMENT: infinitely adustable speed of rolls hydraulic side support hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: the max. sheet metal thickness isequivalent to 50 % of nominal capacity the cone length can be max. 30 % oremust be more than 60 % of roll length hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 53700 € 1014.93 € 2050 mm 16 mm 16 mm 13 mm 13 mm 10 mm Dkodoynm Ehopfx Am Tjp 260 mm 260 mm 200 mm 1,5 / 6 m/min 7.5 kW 4300 mm 1600 mm 1550 mm 6100 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 111500 € 2107.35 € 3100 mm 20 mm 20 mm 16 mm 16 mm 12 mm Dkedpfx Ameynm Ebs Top 350 mm 350 mm 260 mm 1,5-5 m/min 22 kW 6000 mm 2200 mm 1900 mm 15000 kg 4 rolls fullhydraulic drive of upper roll and lower roll hydraulic infeed of lower and side roll digital read-out of lower and side rolls position hardened rolls conical bending device hydraulic load relieving of upper roll hydraulic drop-end bearing 2 working speeds central lubrication system protectionagainst overload moveable control pane according to CE rules OPTIONAL EQUIPMENT: infinitely adustable speed of rolls hydraulic side support hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: the max. sheet metal thickness isequivalent to 50 % of nominal capacity the cone length can be max. 30 % oremust be more than 60 % of roll length hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 60600 € 1145.34 € 3100 mm 10 mm 10 mm 8 mm 8 mm 6 mm 260 mm 260 mm 200 mm 1,5 / 6 m/min 7.5 kW 5350 mm 1600 mm 1550 mm 7685 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Dkedpfxsynm D Rj Am Tsp Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Dodpfxsynmzps Am Tjkp Türkei 32480 € 620.37 € 1550 mm 9 mm 9 mm 7 mm 7 mm 5 mm 180 mm 180 mm 150 mm 1,5 / 6 m/min 5.5 kW 3900 mm 1150 mm 1250 mm 3250 kg 4 rolls fullhydraulic drive of upper roll and lower roll hydraulic infeed of lower and side roll digital read-out of lower and side rolls position hardened rolls conical bending device hydraulic load relieving of upper roll hydraulic drop-end bearing 2 working speeds central lubrication system protectionagainst overload moveable control pane according to CE rules OPTIONAL EQUIPMENT (PRICES ON REQUEST): infinitely adustable speed of rolls hydraulic side support hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: the max. sheet metal thickness isequivalent to 50 % of nominal capacity the cone length can be max. 30 % oremust be more than 60 % of roll length hardened rolls are recommended

Condition: new, neu Dksdpfx Aeynmylom Tjp ca. 12 Wochen ab Auftrags Türkei 73200 € 1383.48 € 2050 mm 20 mm 20 mm 16 mm 16 mm 12 mm 280 mm 280 mm 220 mm 1,5 / 5 m/min 16.5 kW 4350 mm 1700 mm 1850 mm 8550 kg 4 rolls fullhydraulic drive of upper roll and lower roll hydraulic infeed of lower and side roll digital read-out of lower and side rolls position hardened rolls conical bending device hydraulic load relieving of upper roll hydraulic drop-end bearing 2 working speeds central lubrication system protectionagainst overload moveable control pane according to CE rules OPTIONAL EQUIPMENT (PRICES ON REQUEST): infinitely adustable speed of rolls hydraulic side support hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: the max. sheet metal thickness isequivalent to 50 % of nominal capacity the cone length can be max. 30 % oremust be more than 60 % of roll length hardened rolls are recommended