Description Overview Vertical type three roller calender Specification: Φ520 mm × 3700 mm Roll material: 48CrMo Maximum mechanical speed: 350 m/min Highest temperature: 200 °C Maximum line pressure: 150 kg/cm Product specification: 10 g/m² to 200 g/m² Center height of rolls: 1500 mm Roll Details Engraved roll and smooth roll hardness: HRC 58-62 Roll pattern can be designed per customer demand (pattern carved by German laser machine) Rolls are forged normalizing, quenched and tempered; rollers go through intermediate frequency quenching, tempering to the required hardness Thermal deformation of roll ≤ 0.02 mm at roller heating to normal temperature Roll roundness and straightness accuracy (room temperature) ≤ 0.05 mm Axial runout ≤ 0.03 mm Oil heated Roller bearing (from Japan), shaft diameter: Ø 240 mm Bearing oil cooling system with temperature alarm Roller temperature difference: ± 1 °C Returning oil temperature difference < 0.5 °C Circumference drilling Ø 35 mm, hole number 21, hole straightness (including docking error ≤ 0.5 mm) Drive and Control One roller with one motor drive (Siemens XBE) Each roller is driven by one motor independently, with three motors (each 37 kW AC variable frequency) Electronically adjustable angle for roller position (0 to 30 mm) Speed stability, precision error below 0.5% Included Components 16 roller rotary joints (KDNT from America) 1 set of hydraulic station 1 set bearing lubrication and cooling system 1 set of instruments (installed at cloth exit) Additional Specifications Machine sealed with PTFE asbestos packing Hydraulic station voltage is 220 V
