Kk-Industries Cy 95-20/1.5 Without Motor nakup rabljenega (78.754)

Stanje: novo, Sheet thickness: 16 mm Bending length: 3,100 mm Top roll diameter: 330 mm Sheet length: 3,100 mm Technical specifications: - Hardened and polished rolls - Complete frame made of ST-52 steel - 4 rolls arranged symmetrically - Hydraulically operated top cover for easy material removal - Digital display for lower and side roll positions - Hydraulic adjustment - Top and bottom rolls driven by hydraulics and gearbox - Vertical movement of the lower roll hydraulically driven - Mobile control panel - In compliance with CE standards Options: - Variable rotation speed EURO 3,681 - Material feed table EURO 2,501 - Oil cooler EURO 1,040 - Central support EURO 8,600 - Side supports EURO 6,400 - Automatic material extractor - PLC control - CNC control - Automatic material loading system Dkodpfjd Ab Rzex Ab Hjn - Interchangeable top roll - Adjustable lower roll support system (for special customer requirements)

Stanje: novo, Sheet thickness: 6 mm Bending length: 4100 mm Upper roll diameter: 270 mm Technical data: Dodpfx Absd Ab R Ro Hjkn - Hardened and polished rolls - Complete frame made of ST-52 steel - The 4 rolls are symmetrically arranged - Hydraulically operated top cover for easy material removal - Digital display for lower and side roll positions - Hydraulic adjustment - Top and bottom rolls driven by hydraulic system and gearbox - Vertical movement of the lower roll is hydraulically powered - Mobile control console - In compliance with CE standards Options: - Variable rotation speed EUR 4,681 - Material feed table EUR 3,400 - Oil cooler EUR 1,040 - Central support EUR 8,300 - Side supports EUR 9,660 - Automatic material extractor - PLC control - CNC control - Automatic material loading system - Interchangeable top roll - Adjustable lower roll support system (for special customer requirements) We have numerous references!

Stanje: novo, Sheet thickness: 10 mm | Bending length: 2600 mm | Top roll diameter: 230 mm Technical specifications: - Hardened and polished rolls - Frame made entirely of ST-52 steel - Symmetrical 4-roll configuration - Hydraulically operated top cover for easy material removal - Digital display for lower and side roll positions - Hydraulic adjustment - Top and bottom rolls driven by a hydraulic system and gearbox - Vertical movement of the lower roll is hydraulically driven - Mobile control panel - Compliant with CE standards Options: - Variable rotation speed: €4,681 - Material feed table: €3,400 - Oil cooler: €1,040 - Central support: €8,250 - Side supports: €6,600 - Automatic material extractor - PLC control Dkodpjd Ab Sbsfx Ab Hen - CNC control - Automatic material loading system - Interchangeable top roll - Adjustable lower roll support system (for special customer requirements) We have numerous references!

Stanje: novo, Bending length: 3100 mm Dkedpod Ab Sqjfx Ab Hjn Sheet thickness: 40 mm Top roller diameter: 460 mm Technical specifications: - Hardened and polished rollers - Complete frame made of ST-52 steel - Conical bending device - Digital display for side rollers - Portable control panel - Rollers are mounted with bearings - Upper roller cover, hydraulically openable and closable via control panel - All rollers are driven by hydraulic motor and planetary gearbox - Lateral movements are hydraulically powered Options: - Variable rotation speed EURO 5,858 - Material feed table on request - Oil cooler STD. - Central support EURO 18,750 - Side supports EURO 15,000 We have numerous references!

Stanje: novo, Bending length: 4100 mm Sheet thickness: 13 mm Top roll diameter: 360 mm Technical specifications: - Hardened and polished rolls - Complete body made of ST-52 steel - Conical bending device - Digital display for side rolls - Portable control console Dedpfxsd Ab Szo Ab Hjkn - Rolls mounted with bearings - Upper roll cover hydraulically opening and closable via control panel - All rolls driven by hydraulic motor and planetary gearbox - Lateral movements hydraulically operated Options: - Variable rotation speed: EUR 4,682 - Material feed table on request - Oil cooler: EUR 1,040 - Central support: EUR 13,600 - Side supports: EUR 12,516 We have many references!

Stanje: novo, Bending length: 2600 mm Sheet thickness: 25 mm Top roller diameter: 360 mm Technical specifications: - Hardened and polished rollers - Complete body made of ST-52 steel - Conical bending device Dkodpod Ab S Dofx Ab Hsn - Digital display for side rollers - Portable control console - Rollers mounted with bearings - Upper roller cover, hydraulically openable and closable via control panel - All rollers driven by hydraulic motor and planetary gearbox - Lateral movements hydraulically powered Options: - Variable rotation speed EUR 4,682 - Material feed table on request - Oil cooler EUR 1,040 - Central support EUR 13,600 - Side supports EUR 9,200 We have numerous references!

Stanje: novo, Bending length: 2600 mm Sheet thickness: 13 mm Top roller diameter: 270 mm Sheet length: 2600 mm Technical specifications: - Hardened and polished rollers - Complete body made of ST-52 steel - Conical bending device Dkedpsd Ab Tdofx Ab Hon - Digital readout for side rolls - Portable control panel - Rollers mounted on bearings - Top roller cover, hydraulically openable and closable via control panel - All rollers driven by hydraulic motor and planetary gearbox - Lateral movements driven hydraulically Options: - Variable rotation speed EURO 4,682 - Sheet feeding table on request - Oil cooler EURO 1,040 - Central support EURO 8,250 - Side supports EURO 6,690 We have many references!

Stanje: novo, Bending length: 2600 mm Sheet thickness: 8 mm Djdpjd Ab Tlefx Ab Hskn Upper roller diameter: 210 mm Technical specifications: - Hardened and polished rollers - Full body made from ST-52 steel - Conical bending device - Digital readout for side rollers - Portable control panel - Rollers mounted on bearings - Upper roller cover hydraulically openable and closable via control panel - All rollers driven by hydraulic motor and planetary gearbox - Lateral movements hydraulically powered Options: - Variable rotation speed: EUR 4,682 - Material feed table on request - Oil cooler: EUR 1,040 - Central support: EUR 8,250 - Side supports: EUR 6,600 We have numerous references!

Stanje: novo, Sheet length: 1100 mm Sheet thickness: 6 mm Motor: 7.5 kW Width: 2250 mm Length: 1750 mm Height: 1400 mm Dkjdpfjgh Ndmjx Ab Hon Standard equipment: - NC control - Programmable motorized backgauge with 750 mm travel - Shadow line lighting - 1 piece angle stop with scale - 2 sheet support arms - 1 sheet support arm (for models 1106, 1306, 1505) - Finger guard - Ball transfer table - Knife angle easily adjustable from the front - Ball screw spindle - Stroke counter - Portable foot pedal with emergency stop button - Light barrier on the rear guards

Stanje: novo, Sheet length: 1560 mm Sheet thickness: 5 mm Dimensions (LxWxH): 2250 x 2250 x 1400 mm Standard equipment: - NC control unit - Programmable motorized backgauge with 750 mm travel - Shadow line lighting - 1 piece angle gauge with scale Djdpfxogick Is Ab Hekn - 2 sheet support arms - 1 sheet support arm (for models 1106, 1306, 1505) - Finger guard - Ball transfer table - Blade angle easily adjustable from the front - Ball screw spindle - Cut counter - Portable foot pedal with emergency stop button - Light barrier on the rear safety guard

Stanje: novo, Shaft diameter: 580 mm Working speed: 2-5 m/min Motor power: 30 kW Length: 3000 mm Width: 2310 mm Height: 3100 mm Weight approx.: 16,500 kg Technical specifications: - Welded steel frame construction - 3 driven rollers - Hardened and ground shafts made of high-strength special steel - Rollers are hardened and ground - Horizontal working position - Standard hardened rollers - Mobile control panel - Lateral angle guide rollers - Brake motor for precision bending - Digital displays (2 units) Dsdpfx Abjh Alh Ue Hjkn Options: - STANDARD digital display - NC unit 10” screen EURO 11,500,-- -

Stanje: novo, Pressure: 125 Bending length: 3200 mm Distance between uprights: 2655 mm Main motor: 11 kW Maximum ram stroke: 200 mm Machine model: KK Industries 125x3200, 4 axes (Y1-Y2-X-R) with CNC crowning Rated force: 125 t Bending length: 3200 mm Distance between columns: 2655 mm Dkjdpfx Abswacqxo Hsn Throat depth: 400 mm Ram stroke: 200 mm Maximum opening height: 455 mm Ram down stroke speed: 180 mm/s Ram return speed: 160 mm/s Ram working speed: 13 mm/s Main motor power: 11 kW CNC system: ZY68 Number of controlled axes: 4+1 Oil tank capacity: 300 L Back gauge X-axis travel: 600 mm X-axis speed: 200 mm/s Positioning accuracy: ±0.10 mm Repeatability: ±0.015 mm Back gauge motor power: 0.85 kW Back gauge R R-axis travel: 150 mm R-axis speed: 100 mm/s Positioning accuracy: ±0.10 mm Repeatability: ±0.015 mm Dimensions: Length: 3450 mm Width: 1580 mm Height: 2550 mm Weight: 7100 kg Delem T53 control (surcharge €5,000)

Stanje: novo, Pressure: 160 Bending length: 3200 mm Frame gap: 2655 mm Installation height: 400 mm Motor: 11 kW Max. ram stroke: 200 mm Repeat accuracy: 0.015 mm Positioning accuracy: 0.10 mm CNC press brake KK Industries 160x3200, 4 axes Y1-Y2-Y-X-R with CNC crowning Standard equipment: - Robust construction for high stability and precision. - CNC axes: Y1, Y2, X and R axis for precise control and accurate bending operations. - CNC-controlled, motorized crowning system for exact adjustment. - CNC control ZY 68 by the manufacturer (similar to Delem), user-friendly interface and high flexibility. - Backgauge with linear guides and ball screw drive, equipped with 4 stopper fingers for precise material positioning. - 2 sheet support arms for ergonomic material handling. - Laser safety device on the upper beam to ensure operator safety during operation. - Quick-clamping system for the top tool enables rapid and simple tool changes. - Top tool system: Promecam Amada, split and goosenecked for maximum flexibility. Dkedsv S Npyepfx Ab Hon - Multi-V die system: Both Promecam and Amada systems compatible. - CE safety equipment, complies with all relevant safety regulations. Optional: Delem T53 control (surcharge: €5,000)

Stanje: novo, Pressure: 200 Bending length: 3200 mm Frame width: 2700 mm Installation height: 400 mm Stroke length (max.): 200 mm Throat depth: 350 mm Dimensions (LxWxH): 3700 x 1700 x 2700 mm Weight approx.: 14,000 kg CNC Press Brake 3200 mm x 200 t Standard equipment: ----- Robust construction CNC axes Y1, Y2, X, and R CNC crowning device motorized with CNC control Original DELEM DA 58 T 15" touchscreen CNC control Backgauge with linear guide and ball screw, 4 stop fingers 2 sheet support arms Laser safety device on upper beam Quick clamping system for upper tooling Upper tool system: Promecam Amada segmented and gooseneck Multi-V die system compatible with both Promecam and Amada systems Dkedpfxetvhxmj Ab Hsn CE-certified safety equipment

Stanje: novo, Pressure: 200 Bending length: 3200 mm Frame width: 2700 mm Installation height: 400 mm Stroke length (max.): 200 mm Throat depth: 350 mm Dimensions (LxWxH): 3700 x 1700 x 2700 mm Weight approx.: 14,000 kg CNC Press Brake 3200 mm x 200 t Standard equipment: Dkjdpfettxh Njx Ab Hen ----- Robust design CNC axes: Y1, Y2, X and R axis CNC crowning device, motorized, with CNC control CNC controller Original DELEM DA-58T, 15” touchscreen Backgauge with linear guide and ballscrew, with 4 stop fingers 2 sheet support arms Laser safety device on upper beam Quick clamping system for upper tool Upper tool system: Promecam Amada segmented gooseneck die Multi-V die system; both Promecam and Amada systems possible CE safety equipment

Stanje: novo, Pressure: 200 Bending length: 3200 mm Frame width: 2700 mm Installation height: 400 mm Maximum stroke length: 200 mm Throat depth: 350 mm Dimensions (LxWxH): 3700 x 1700 x 2700 mm Approx. weight: 14,000 kg CNC Press Brake 3200 mm x 200 to Standard equipment: Dodpfx Abotvhxio Hskn ----- Robust construction CNC axes: Y1, Y2, X, and R axis CNC-controlled motorized crowning system Original DELEM DA-58T CNC control, 15-inch touchscreen Back gauge with linear guide and ball screw, with 4 stop fingers 2 sheet supporter arms Laser safety device on upper beam Quick-clamp system for upper tool Upper tool system: Promecam/Amada segmented, gooseneck design Multi-V die system, compatible with both Promecam and Amada systems CE-compliant safety equipment

Stanje: novo, Pressure: 200 Bending length: 3200 mm Frame width: 2700 mm Installation height: 400 mm Stroke length (max.): 200 mm Throat depth: 350 mm Dimensions (LxWxH): 3700 x 1700 x 2700 mm Weight approx.: 14,000 kg Motor: 15 kW CNC Press Brake 3200 mm x 200 t Standard equipment: ----- Robust construction CNC axes Y1, Y2, X and R axis CNC crowning system, motorized and CNC controlled CNC controller Original DELEM DA 58 T touchscreen, 15-inch Dsdstq Nm Nspfx Ab Hskn Backgauge with linear guide and ball screw with 4 stops 2 sheet support arms Laser safety device on the upper beam Quick clamping system for upper tool Tool system upper tool Promecam Amada, segmented and gooseneck Multi V-die system, both Promecam and Amada compatible Safety equipment Our machine features an Ecoline mode, which allows energy consumption optimization to save costs, and the machine operates very quietly.

Stanje: novo, Shaft diameter: 180 mm Upper roll diameter: 60 mm Lower roll diameter: 50 mm Working speed: 5 m/min Motor power: 3 kW Length: 1200 mm Width: 850 mm Height: 1200 mm Approx. weight: 1000 kg Technical Data: - Welded steel frame construction - 3 driven rolls - Hardened and ground shafts made from high-strength special steel - Rolls are hardened and ground - Horizontal and vertical working positions - Hardened standard rolls - Mobile control panel - Angle side guide rollers - Equipped with brake motor for precision bending - Digital displays (2 units) Options: - STANDARD digital display - NC unit, 7" screen, EURO 9,000 HPK 50 File Type Size Min. Dia Notes 1 60x10 20x5 500 250 Standard Rolls 2 80x20 50x5 500 250 Standard Rolls 3 32x32 12x12 400 250 Standard Rolls 4 Ø35 Ø10 350 250 Optional Rolls 5 Ø60x2 Ø15x1.5 600 200 Optional Rolls 6 2”x3.9 1/2”x2.7 400 200 Optional Rolls 7 50x25x3 20x15x2 450 250 Optional Rolls 8 45x3 20x2 600 300 Optional Rolls 9 60x60x6 30x30x4 650 350 Optional Rolls 10 50x50x5 30x30x4 550 350 Optional Rolls 11 60x7 20x3 550 250 Standard Rolls 12 50x6 20x3 500 250 Standard Rolls 13 60x7 20x3 500 250 Standard Rolls 14 UPN 80 UPN 30 600 250 Optional Rolls* 15 UPN 65 UPN 30 600 250 Standard Rolls* * Special washer (spacer) may be required / Only with special beam bending attachment • Capacities specified for 260 N/mm² plate yield strength Dkodsd Ab H Njpfx Ab Hjn

Leto izdelave: 2016, stanje: rabljeno, KK PULLTESTER KKP03A / Series 6 Year of manufacture: 2016 The KK Pulltester is a testing device for quality assurance in the graphic arts industry. It precisely measures the adhesive bond strength of individual pages in catalogues, paperbacks, magazines, brochures, and books. The number of pages to be tested, page number, job number, and book block length are programmed before the measurements. Technical specifications: Language: German Dkedpfxjwcd Iqs Ab Hsn Book block width: approx. 5 - 35 cm Book block length: approx. 7 - 40 cm Book block thickness: approx. 7 cm

Stanje: novo, Pressure: 100 Motor: 15 Mounting height: 500 Max. stroke length: 400 Table size: 800 x 600 Ram area: 800 x 600 Table height: 850 Dimensions (LxWxH): 1,300 x 2,000 x 2,750 Approx. weight: 5,500 Oil capacity: 200 Control / Key switch: Dksdom Nntyspfx Ab Hon 1. Set-up mode Manual without light sensor (max. 10mm/sec speed) 2. Automatic (with full speed) with light sensor Main cylinder: Ø 230mm Auxiliary cylinders: 2 pcs Ø 50 x 30mm Auxiliary guides: 2 pcs Ø 50mm Motor: 11 kW – 15 hp (IE-3) Pump: 23 liters / ASC Speed: Advance 110mm/sec – Return 200mm/sec – Pressure: 9mm/sec Mounting height: 500mm Stroke length: 400mm Table plate: 800 x 600 (with T-slots) (custom designs possible) Ram plate: 800 x 600 (with T-slots) Table height: 850mm (floor to top edge of table plate) ----- Hydraulic Accessories: Hydraulic control block & accessories: REXROTH Pressure setting via PLC (20 – 100 tons) Speed adjustable via PLC Air cooler Pre-fill valve Control Accessories: Siemens S7-1200 Main control cabinet Swiveling operator panel Safety PLC – SICK Light sensors SICK 700 + 150mm Linear scale for setting stroke length 9” PLC display – Siemens (German & English) Mobile two-hand operation Ethernet connection for remote maintenance Alarm indicator for faults (light & sound) 2x workstation lighting 8 free inputs & outputs on the PLC for external connections The press complies with Machinery Directive Hydraulic proportional valves Dual-channel cable safety Operating manual & parts list (German) With side safety door (doors slide to the rear)

Stanje: novo, Pressure: 100Motor: 11Installation Height: 500Max. Stroke Length: 400Ram Adjustment: 790 x 600Table Height: Floor to Top of Table - 850Dimensions (LxWxH): 1,300 x 2,000 x 2,750 mmWeight approx.: 5,500Oil Fill: 200Type: Hydraulic C-Frame PressCapacity: 100 tons at 230 bar Control / Key Switch Modes: Setup Mode – Manual, without light curtain Automatic Mode – Full speed with light curtain Hydraulic System: Main Cylinder: Ø 230 mm Auxiliary Cylinders: 2 units, Ø 50 x 30 mm Auxiliary Guides: 2 units, Ø 50 mm Motor: 11 kW / 15 HP Pump: 16 cc – 23 l/min, helical gear pump Speeds: Advance: 110 mm/sec Return: 200 mm/sec Pressure Phase: 9 mm/sec Machine Dimensions: Installation height: 500 mm Stroke length: 400 mm Ram plate: 790 x 600 mm (with T-slots) Table plate: 790 x 600 mm (with T-slots) Table height: 850 mm (from floor to top of table) Hydraulic Accessories: Hydraulic control block & components by REXROTH Pressure setting via PLC (20 – 100 tons) Speed adjustable via PLC Air cooler Pre-fill valve Pressure holding valve Control Accessories: Siemens S7-1200 control system Main control cabinet Safety PLC by SICK Safety light curtains by SICK (700 mm) Linear scale for stroke adjustment 10" BEIJER touchscreen (German & English) Movable two-hand control Ethernet interface for remote maintenance Fault indicator with light and audible alarm Dual workspace lighting Side safety doors (can be swung out) Hydraulic proportional valves Dual-channel safety control Operating manual & parts list (German) Complies with current machinery directive EN 693 Oil quantity: 220 liters (tank volume: 250 liters) Total weight: approx. 5,500 kg Dimensions: 1,300 x 2,000 x 2,750 mm Paint finish: RAL 7035 light grey & RAL 7016 anthracite grey Dsdpfxowrkcto Ab Hokn

Stanje: novo, Shaft diameter: 580 mm Working speed: 3-6 m/min Motor power: 30 kW Length: 2760 mm Width: 2310 mm Height: 2680 mm Approx. weight: 14,400 kg Dkedpfxjh Alh Ho Ab Hsn Technical specifications: - Welded frame made of steel construction - 3 rollers driven - Hardened and ground shafts made from high-strength special steel - Rollers are hardened and ground - Horizontal and vertical working position - Standard hardened rollers - Mobile control panel - Angular side guide rollers - Brake motor for precision bending - Digital displays (2 units) Options: - STANDARD digital display - NC unit 10Screen EURO 11,500,--

Stanje: novo, Dimensions (LxWxH): 0.80 x 0.85 x 1.20 m Approx. weight: 0.61 t Total power requirement: 4 kW Sheet thickness: 6 mm Details: Dsdpfod Ab Icex Ab Hokn - Hydraulic drive, 6 mm at fixed 90° - Blade length: 200 mm - Clipping angle: 90°

Stanje: novo, Pressing Force: 150 t Motor: 15 kW Djdpfewzzzfsx Ab Hekn Installation Height: 500 mm Max. Stroke Length: 400 mm Table Size: 900 x 600 mm Ram Area: 900 x 600 mm Table Height: 850 mm Dimensions (LxWxH): approx. 1300 + (300 control cabinet) x 2000 x 3200 mm Weight approx.: 8,000 kg Oil Filling: 400 l Hydraulic C-Frame Press General Information: Design: C-frame, hydraulic Pressing Force: 150 t at 240 bar Return Force: 30 t at 150 bar Voltage: 400 V / 50 Hz Standards: Machinery Directive EN 693 Paintwork: RAL 7035 – Light Grey Warranty: 12 months Dimensions (WxDxH): approx. 1300 + 300 mm control cabinet x 2000 x 3200 mm Total Weight: approx. 8,000 kg Control System: Mode 1: Setup mode without light sensor Mode 2: Automatic mode (single stroke) with light sensor PLC Control: Siemens S7–1200 Safety PLC: SICK Swiveling operator panel with soft starter Two-hand control (mobile) Light sensors: SICK 700 + 130 mm Stroke Measurement System: Ruler scale (500 mm) Touchscreen: 9" Siemens, memory for up to 500 tool sets Remote maintenance: Secomea module 8 free I/O ports for external connections (e.g., robot, coil line) Work area lighting (double) Hydraulic System: Main Cylinder: Ø 270 mm Auxiliary Cylinders: 2 x Ø 70 x 40 mm Auxiliary Guides: 4 x Ø 50 mm Motor: 15 kW / 22 HP (IE3) Auxiliary Motor: 2.2 kW / 3 HP Pump: 45 cc, 65 l/min – REXROTH Auxiliary Pump: present Tank Volume: 500 l Oil Volume: 400 l Air cooler for oil tank Hydraulic accessories: REXROTH hydraulic block & valves, pre-fill valve, hydraulic & mechanical ram lock (top dead center) Pressure & speed adjustable via PLC Mechanical Data: Installation height: 500 mm (distance ram – table top) Stroke length: 400 mm Die depth: 650 mm Throat depth: 350 mm Table height: 850 mm (floor to table top) Plate dimensions: Table plate: 900 x 600 x 120 mm (with T-slots, customer-specific) Ram plate: 900 x 600 x 300 mm (with T-slots & spring welding) Speeds (adjustable via PLC): Approach: 120 mm/s Return: 140 mm/s Pressing phase: 13 – 5 mm/s Control & Electronics: Main control cabinet Pressure & speed adjustment via PLC Swiveling operator panel Mobile two-hand control Light sensors SICK Stroke measurement system Display: 9" Siemens touchscreen Remote maintenance via Secomea module Safety & Operation: Hydraulic proportional valves Dual-channel safety system Lateral safety doors (sliding to the rear) Operating instructions & parts list (German), including maintenance plan

Stanje: novo, Dolžina pločevine: 3100 Debelina pločevine: 13 Upogibanje: 10 Skupna potrebna moč: 15 Teža približno: 10 Dimenzije (DxŠxV): 4,88x1,16x1,18 Slika podobna Premer valja (zgoraj/spodaj): Ø270 mm Dolžina upogibanja: 3.100 mm Največja debelina pločevine za običajno upogibanje: 13 mm Največja debelina pločevine za pred-upogibanje: 10 mm Pred-upogibanje / Upogibanje: 8 mm / 10 mm (glede na polmer Ød × 1,5) CE-standard Spremenljiva hitrost Krmilna enota – 7-palčni zaslon na dotik Stožčasto upogibanje Induktivno kaljeni valji Pozicioniranje stranskih valjev preko elektronsko sinhroniziranega PLC Spodnji valj trdno mehansko sinhroniziran Varnostni mehanizem za varjenje na stroju Ograja za sprostitev napetosti iz jeklene konstrukcije Ležajni valji Hidravlično odpiranje zgornjega valja Zgornji in spodnji valji poganjani s hidravličnim motorjem in planetnim menjalnikom Dksdpfx Asd Ab H Eeb Hjn Električna in hidravlična zaščita pred preobremenitvijo Hidravlično nastavljiv pritisk spodnjih valjev