Used Fastech 3-Roll Round Bending Machine for sale (1,03,329)

Condition: new, neu ca. 12 Wochen ab Auftrags Türkei 38000 € 725.8 € 2050 mm 8 mm 8 mm 6 mm 8 mm 6 mm 6 mm 4 mm 180 mm 180 mm 150 mm 5 m/min 3850 mm 1350 mm 1290 mm 3300 kg motorized roller drive upper and lower roller driven hydraulic side roll feed 3 digital displays hydraulic folding bearings hardened rollers conical bending device user manual in GERMAN or ENGLISH Iiodpfsyb S Afjx Acrsc OPTIONAL EQUIPMENT (PRICES ON REQUEST): overhead crane side supports NC control variable speed

Condition: new, neu ca. 12 Wochen ab Auftrags Türkei 21800 € 418.56 € 1270 mm 5 mm 5 mm 4 mm 5 mm 4 mm 4 mm Iedpfx Aoyb Sz Ujcreic 3 mm 130 mm 130 mm 130 mm 5 m/min 2,2 + 1,1 kW 3020 mm 1150 mm 1110 mm 2150 kg motorized roller drive upper and lower roller driven hydraulic side roll feed 3 digital displays hydraulic folding bearings hardened rollers conical bending device user manual in GERMAN or ENGLISH OPTIONAL EQUIPMENT (PRICES ON REQUEST): overhead crane side supports NC control variable speed

Condition: new, neu ca. 12 Wochen ab Auftrags Türkei 29000 € 553.9 € 2050 mm 4 mm 4 mm 3 mm 3 mm 2 mm 130 mm 130 mm 130 mm 5 m/min 2,2 + 1,1 kW 3800 mm 1150 mm 1110 mm 2450 kg motorized roller drive upper and lower roller driven hydraulic side roll feed 3 digital displays hydraulic folding bearings hardened rollers conical bending device user manual in GERMAN or ENGLISH OPTIONAL EQUIPMENT (PRICES ON REQUEST): Iijdpeyb Sy Djfx Acrsc overhead crane side supports NC control variable speed

Condition: new, sheet thickness: 1.8upper roll diameter: 70messurements (LxWxH): 1650 x 700 x 1160prebending: 1.5motor: 1,1sheet length: 1050 Technical specifications: - Cast iron body - By manuel or motorised (optional) bending - Opening top roll to side after bending for taking out the material easily - Cone bending device - Movement of the back and bottom rolls up and down manually with hand wheel - Portable control panel in order to control material from required  locations with foot pedal  - In acccordance with CE norms. Options: - Back roll with motor  - Digital readout for displaying position of the backroll - Body cover EURO 274,-- - Hardened rolls EURO 392,-- - Variable speed of Rotation Iisdsd Ab T Rspfx Acrsc We have many references!

Condition: used, Max. bending length: 1020 mm Max. sheet thickness: 1.5 mm steel Roller diameter: 65 mm Iedpfozfk Rnex Acreic Right and left rotation via foot switch Safety rope pull switch

Condition: used, Roll guiding device WITELS-ALBERT Berlin, type ER 7 Guiding roller width: 30 mm Guiding roller diameter: 30 mm Belt cross-section: approx. 1.5 x 10 mm or 0.5 x 25 mm - Individual adjustment for the 3 upper guiding rollers via wing nut and lock nut - Quick-release mechanism via eccentric lever for the 4 lower guiding rollers - 2 pre-forming guiding rollers, Ø 32 x 13 mm, mounted with a 90° offset Ijdpfszczvdsx Acrjic - For guiding strip steel, last used for a belt cross-section of approx. 1.5 x 10 mm Space required L x W x H: 250 x 100 x 150 mm Weight: 5 kg Good condition

Condition: ready for operation (used), functionality: fully functional, Year of construction: 2008, roller (top) diameter: 130 mm, side roll diameter: 110 mm, working width: 1,030 mm, sheet thickness (max.): 6 mm, sheet thickness steel (max.): 6 mm, power: 2.2 kW (2.99 HP), number of digital displays: 3, Equipment: emergency stop, foot remote control, 4-Roll Round Bending Machine Manufacturer: Sahinler, Type: 4RM 10-130 HRC Year of Manufacture: 2008 Technical Data Manufacturer: Sahinler Type: 4RM 10-130 HRC Iiodpfozcpu Ujx Acrec Year of Manufacture: 2008 Usable Length: 1030 mm Top Roll Diameter: 130 mm Side Roll Diameter: 110 mm Sheet Thickness (without pre-bending): 6 mm Sheet Thickness (with pre-bending): 5 mm Total Power: 2.2 kW Dimensions: 2.4 x 1 x 1 m Weight: approx. 1.5 t Equipment • Hardened rolls • Digital display for roll positioning All information without guarantee.

Condition: good (used), functionality: fully functional, Year of construction: 1990, machine/vehicle number: 4ROLL, roller (bottom) diameter: 470 mm, roller (top) diameter: 470 mm, side roll diameter: 420 mm, roller diameter: 470 mm, roller length: 3,050 mm, working width: 3,050 mm, working height: 1,800 mm, sheet thickness (max.): 50 mm, sheet thickness steel (max.): 45 mm, sheet thickness aluminum (max.): 45 mm, sheet thickness copper (max.): 45 mm, overall weight: 43,000 kg, total length: 7,700 mm, total width: 2,410 mm, total height: 2,470 mm, power: 37 kW (50.31 HP), input voltage: 380 V, type of input current: three-phase, working length: 3,050 mm, Equipment: documentation/manual, emergency stop, PLATE BENDING MACHINE FACCIN - 4 ROLL HYDRAULIC 3000 X 40 MM MODEL 4HCI3-35/30 YEAR 1990 PLATE BENDING ROLL LINEAR GUIDEWAYS DOUBLE PINCH PRE-BENDING Machine in good working condition Bending capacity -Plate width : 3000 mm -Rolling plate thickness 40 mm - Prebend thickness 35 mm Rolls dimensions: -Useful length 3050 mm -central rolls upper/lower 470 mm Iisdpfx Acowb Scmorjc -side rolls left/right 420 mm • Hardening of the 4 rolls high strength surface • 3 rolls driven powered with gear unit with hydraulic motor • Conical bending attachment side rolls tiltable to form cones, contrast pad roller type. • Opening front hydraulic drop-end to unload the closed shell. • Variable speed working roll bending rotation hydraulic speed fast/slow. • Console electric on wheels with centralized commands joysticks and 3 digital readout. • Digital readouts of the rolls position bending and pre-bending repeatability. • Hydraulic tank capacity oil 350 liters – power electric 37 Kw voltage 380 /50 • Dimension 7700 x2410 x H 2470 mm - weight 43000kgs

Condition: ready for operation (used), functionality: fully functional, Year of construction: 1985, machine/vehicle number: 3ROLL 4000 X 6 MM, roller (bottom) diameter: 300 mm, roller diameter: 310 mm, roller length: 4,050 mm, working width: 4,000 mm, sheet thickness steel (max.): 6 mm, sheet thickness aluminum (max.): 6 mm, sheet thickness copper (max.): 6 mm, overall weight: 11,000 kg, total length: 5,700 mm, total width: 1,500 mm, total height: 1,700 mm, type of input current: three-phase, working length: 4,000 mm, Equipment: documentation/manual, emergency stop, 3 ROLL PLATE BENDING MACHINE WITH PREPINCHING capacity plate roll 4000 x 6 mm Plate width 4000 mm Thickness plate rolling 6 mm Iodpsvn I Hcefx Acrsic Pyramid 3 rolls with pre-pinch cylindrical plate rolling Conical plate rolling Rollers surface length 4050 mm Top roll 310 mm Side rolls 300 mm Datasheet power rollers rotation 15 Hp -3 rolls driven rotation with gear unit power bending- prebend side lower rollers 7,5+7,5 Hp Cene bending attachment rollers tiltable for plate conical forming - hardened contrast pad roller type Hydraulic open front drop-end , top-roll tilt-up wide opening for unloading Console electric on wheels, electric push buttons commands remote Digital readouts rollers position repetability safety and emergency installiton machine in working condition dimension 5700 x1500 x H1700 mm weight 11 Ton

Condition: like new (used), functionality: fully functional, Year of construction: 2025, machine/vehicle number: M3022, control type: manual, degree of automation: manual, actuation type: hydraulic, controller manufacturer: Delsy, controller model: Digital readout, number of rollers: 4, roller (bottom) diameter: 330 mm, roller (top) diameter: 350 mm, side roll diameter: 260 mm, roller diameter: 400 mm, roller length: 3,000 mm, working width: 3,100 mm, working height: 900 mm, sheet thickness (max.): 22 mm, sheet thickness steel (max.): 22 mm, sheet thickness stainless steel (max.): 22 mm, sheet thickness aluminum (max.): 30 mm, overall weight: 13,000 kg, power: 10 kW (13.60 HP), input voltage: 400 V, input frequency: 50 Hz, number of digital displays: 4, warranty duration: 12 months, Equipment: cone bending device, documentation/manual, hardened rollers, swiveling upper roller, Bending capacity with dual Initial pinch planetary plate width 3000 mm thickness 22 mm pre-bend 18 mm Iiedpfeid Al Njx Acrjc --- Length on the rolls 3100 mm top roll 350 mm lower roll 330 mm Power electric 20Hp Vac 400/50 Installed configuration Hardened surface of the 4 rolls Driven central rolls rotation hydraulic motorized with gear units Synchronized hydraulic rotation between the rolls Rolls parallelism lifetime set with torsion bar Conical plate bend hydraulic attachment Calibration re-rolling feature for welded shells Front open drop-end to unload the closed rolled plates. Control console electric commands with digital readout Safety and emergency systems installed Manuals and schematics originals

Condition: like new (used), functionality: fully functional, Year of construction: 2024, machine/vehicle number: 4ROLL 3000X 15 MM, roller (bottom) diameter: 270 mm, roller (top) diameter: 290 mm, side roll diameter: 250 mm, roller diameter: 310 mm, roller length: 3,100 mm, working width: 3,000 mm, working height: 800 mm, sheet thickness (max.): 15 mm, sheet thickness steel (max.): 15 mm, sheet thickness aluminum (max.): 20 mm, sheet thickness copper (max.): 25 mm, overall weight: 8,500 kg, total length: 5,100 mm, total width: 1,500 mm, total height: 1,800 mm, power: 7.35 kW (9.99 HP), number of digital displays: 2, warranty duration: 12 months, cone diameter: 400 mm, working length: 3,000 mm, Equipment: cone bending device, documentation/manual, emergency stop, hardened rollers, swiveling upper roller, 4 ROLL DUAL PRE-PINCH ROLLING MACHINE NEW -Width of plate 3000 mm -Thickness of plate rolling 15 mm -Thickness of plate pre-bend 12 mm minimum bending diameter ID 350 mm Rolls dimensions: -Surface length mm. 3100 Iiodpfxewfc S Ts Acrec -Top roll mm. 290 -pinch roll mm. 270 -Power electric 10 Hp Technical data: -rolls hardened surface high resistance -variable rolling speed -Powered driven hydraulic rolls rotation -conical bending attachment roller type -calibration system re-rolling welded shells -deflection pinch pressure adjustable upon the thickness -overload protect complete safe operation of the machine. -control console on wheels with electric joysticks commands -position readout digital display for rolling memorize and repeat

Condition: good (used), Year of construction: 2008, sheet width 2050 mm plate thickness 20.0 mm ST pre-bending 16.0 mm ST diameter of upper rolls ca. 270 mm side roll diameter ca. 240 mm diameter of lower rolls ca. 250 mm Number of working hours ca. 7.800 h Control "EASY PRO" oil volume ca. 200 Liter voltage 380 V total power requirement 13.5 kW weight ca. 9.000 kg Dimensions (only the machine) 4000 x 2080 x 1800 mm Good condition (!!) Current list price approx. 150.000 euros Special price available upon request Features: - Robust electro-hydraulic 4-roll round bending machine * Arc-shaped feed of the side rollers (swing arm technology) - 4-roller design offers a wide range of bending and rounding options * Rolling process completed in a single pass - Mobile control unit * DAVI "DAVI EASY PRO" numerical control * Manual or automatic operation selectable * Programming "Self-Learning" mode available * Control of all rollers and machine axes * Digital position display for the rollers - Curved feed of the side rollers (DAVI "PSG" guide system) * Tight bending radii of up to 1.1 times the upper roller diameter possible * Instead of the usual 1.5 times with linear guides * Optimal bending = short sheet ends during bending - Conical rolling possible via roller tilt * Tight diameters possible due to low machine frame Iiodjzc Rv Tjpfx Acrjc - Electronic roller parallelism - Stepless speed adjustment (max. 5.0 m/min) - Bending on both sides - Forged and hardened rollers with a hardness of 53-55 HRC - Low-maintenance, robust machine design - Easy sheet removal thanks to low machine frame - Sturdy welded steel construction - Electro-hydraulic swivel bearing for easy tube removal - Operating instructions

Condition: as good as new (ex-display), Year of construction: 2024, turntable diameter: 390 mm, bending angle (max.): 360 °, Stierli Radial 2500 CNC bending machine Radial bending machine with large rotary table for bends up to 360°. Bending power 2500 Nm Bending capacity flat steel 60x15 mm S235 Bending capacity round steel ø30 mm S2353 turntable ø : 390 or 550mm Pre-feed machine year 2022 incl. hand- and foot pedal Machine as new Works like a classic hand bender, but driven, very precise and programmable. Incl. stop manual or programmable CNC stop 1, 2 or 3m. The bending angles as well as the stop positions are digitally programmable and can be stored in bending programs. The standard tooling is made by simple bending pins. A driver bends the material around these bending pins. These tools can also be manufactured very easily by the customer. In addition to the standard bending bolts, we (or our customers themselves) also manufacture tools for other sections. Possible are sheet metal bending, flat steel, round steel, various profiles, frames etc.. Bending jaws can also be screwed on, which allows bending of very small radii. (similar to a hand bending machine) Ijdpegqfp Hefx Acreic This machine solves your bending tasks!

Condition: refurbished (used), BENDING ROLL MACHINE ROUNDO SHEET METAL LENGHT 2500mm SHEET METAL THICKNESS 30/25mm 3 ROLLS WEIGHT: 19.000kgr Iodohx N Ukjpfx Acroic

Condition: refurbished (used), BENDING ROLL MACHINE SHEET METAL LENGHT 4000mm SHEET METAL THICKNESS 15mm Iodpfehxyilox Acreic 3 BENDING ROLLS PREBENDING WEIGHT: 23.000kgr THE MACHINE IS IN TOP CONDITION LIKE NEW NEW ELECTRIC PANEL, NEW ELECTRIC CABINET, NEW CABLES, NEW SEALS, MOTOR AND PUMB RESTORATION

Condition: new, bending length: 1550sheet thickness: 3.5upper roll diameter: 110 Technical specifications: - Back roll with motor - Cone bending device - Body is made of St 52 steel - Main motor with brake system - Top and bottom rolls are driven bybrake electric motor, gears and gearbox system Iedpfx Aod Ab N Docrjic - Portable control panel  - Cast iron body - Movement of the back and lower rolls up and down manually - In acccordance with CE norms Options: - Back roll powered by electric motor EURO 1.166,-- - Digital readout for displaying position of the backroll EURO 1.010,-- - Hardened rolls EURO 995,-- - Special voltage EURO 480,-- - Material feeding table - Lower roll is powered by electric motor We have many references!

Condition: new, bending length: 1050sheet thickness: 5upper roll diameter: 110 Technical specifications: - Back roll with motor Ijded Ab N Hspfx Acroic - Cone bending device - Hardened and polished rolls - Body is made of St 52 steel - Main motor with brake system - Top and bottom rolls are driven bybrake electric motor, gears and gearbox system - Portable control panel  - Cast iron body - Movement of the back and lower rolls up and down manually - In acccordance with CE norms Options: - Back roll powered by electric motor EURO 1.166,-- - Digital readout for displaying position of the backroll EURO 1.010,-- - Hardened rolls EURO 725,-- - Special voltage EURO 480,-- - Material feeding table - Lower roll is powered by electric motor We have many references!

Condition: used, Year of construction: 1997, Technical details: Iedpfxeyh D Nnj Acrsic sheet width: 3050 mm plate thickness: 16 mm pre-bending: 12 distance between columns: 5200 mm roll dia. top roll: 330 mm roll dia. bottom roll: 360 mm Total power requirement: 15 kW weight of the machine ca.: 18,0 t dimension machine xH: 5,3 x 2,4 x 2,0 m

Condition: new, Year of construction: 2025, control type: NC control, actuation type: hydraulic, number of rollers: 3, roller (top) diameter: 150 mm, side roll diameter: 130 mm, working width: 2,050 mm, sheet thickness (max.): 6 mm, sheet thickness steel (max.): 6 mm, Equipment: cone bending device, documentation/manual, emergency stop, foot remote control, hardened rollers, swiveling upper roller, STANDARD EQUIPMENT - Steel construction main frames - Hydraulic top roll opening head - Movable control panel - Centrally driven rolls powered by electric motor - Hydraulic up/down movement of rear and lower roll - Precision bending with main motor equipped with brake - Conical bending and pre-bending system - Upper and lower roll driven by planetary gearbox - Rear roll ball support system for easier plate handling - Compliance with EU safety directives - High-strength forged steel rolls made of SAE 1050 (CK45) certified steel - Hardened shafts - Digital indicators (2 pcs) - Operating manual OPTIONAL EQUIPMENT - Overhead crane (elevator) for support during large-diameter bending - Hydraulic side supports for large-diameter bending - Ground and polished rolls - Wire grooves on roll ends - NC control unit - Dual-speed operation - Stepless speed adjustment - Ejector system - Hydromotor option TECHNICAL SPECIFICATIONS Bending Length: 2050 mm Pre-Bending: 3/4 mm Bending: 4/6 mm Upper & Lower Roll Diameter: 150 mm Side Roll Diameter: 130 mm Min. Bending Diameter: 225 / 750 mm Motor Power: 2.2 + 1.1 kW Bending Speed: 6 m/min Tank Capacity: 25 l Length: 3800 mm Width: 950 mm Height: 1100 mm Iedpfxexw D Udj Acrsic Weight: 2250 kg

Condition: new, Year of construction: 2025, control type: NC control, actuation type: hydraulic, number of rollers: 3, roller (bottom) diameter: 250 mm, roller (top) diameter: 250 mm, side roll diameter: 200 mm, roller length: 2,550 mm, sheet thickness (max.): 10 mm, STANDARD EQUIPMENT - Steel construction main frame - Hydraulic top roll opening head - Movable control panel - Motor-driven central rolls - Hydraulic up-down movement for rear and lower rolls - Precision bending with braked main motor - Cone bending and pre-bending system - Lower and upper rolls driven by planetary gearbox - Rear roll ball system facilitating sheet movement - Compliance with EU safety directives - High-strength forged steel rolls manufactured from SAE 1050 (CK45) certified steel - Hardened shafts - Digital indicators (2 units) - User manual OPTIONAL EQUIPMENT - Overhead crane (elevator) for supporting large diameter bending - Hydraulic side supports for large diameter bending - Ground and polished rolls - Wire grooves at roll ends - NC control unit Iedpfow Slcgox Acroic - Dual speed operation - Infinitely variable speed adjustment - Ejector system - Hydro-motor option TECHNICAL SPECIFICATIONS Bending length: 2550 mm Pre-bending: 6/8 mm Bending: 8/10 mm Top & Bottom Roll Diameter: 250 mm Side Roll Diameter: 200 mm Min. Bending Diameter: 375 / 1250 mm Motor Power: 7.5 + 1.5 kW Bending Speed: 5 m/min Tank Capacity: 25 l Length: 4500 mm Width: 1200 mm Height: 1370 mm Weight: 4800 kg

Condition: new, Year of construction: 2025, control type: NC control, actuation type: hydraulic, number of rollers: 3, roller (bottom) diameter: 250 mm, roller (top) diameter: 250 mm, side roll diameter: 200 mm, roller length: 3,100 mm, sheet thickness (max.): 9 mm, overall weight: 5,400 kg, STANDARD EQUIPMENT Steel construction main frames Hydraulic upper roll opening head Movable control panel Motor-driven central rolls Hydraulic up/down movement for rear and bottom rolls Precision bending with braked main motor Cone bending and pre-bending system Upper and bottom rolls driven by planetary gearbox Rear roll ball support system for easier sheet movement Compliance with EU safety directives High-strength, forged steel rolls manufactured from SAE 1050 (CK45) certified steel Hardened shafts Digital readouts (2 units) Operator's manual OPTIONAL EQUIPMENT Overhead crane (elevator) for support in large diameter bending Hydraulic side supports for support in large diameter bending Ground and polished rolls Wire grooves on roll ends NC control unit Dual-speed operation Infinitely variable speed adjustment Ejector system Hydraulic motor option TECHNICAL DATA Bending Length: 3050 mm Pre-bending: 5/7 mm Bending: 7/9 mm Top & Bottom Roll Diameter: 250 mm Side Roll Diameter: 200 mm Min. Bending Diameter: 375 / 1250 mm Motor Power: 7.5 + 1.5 kW Bending Speed: 5 m/min Tank Capacity: 25 L Length: 5000 mm Width: 1200 mm Height: 1370 mm Iedpfx Acjw Slbvsrsic Weight: 5400 kg

Condition: good (used), Scharringhausen round bending machine Type: UDR-X1-3 Capacity: 3000 x 30 mm Tube length: 3100 mm Upper tube diameter: 470 mm Lower tube diameter: 410 mm Engine power: 70 HP Dimensions: 830x245x295 cm LxWxH Iodpfx Acsimmb Ioreic Weight: ca 55000 KG Included documentation Movie available!

Condition: excellent (used), Year of construction: 2001, sheet width 3100 mm plate thickness 6.0 mm ST pre-bending 4.0 mm ST diameter of upper rolls 200 mm side roll diameter 165 mm diameter of lower rolls 190 mm bending speed ca. 5.0 m/min Control DIGI oil volume 80.0 Liter voltage 380 V total power requirement 6.0 kW weight 6000 kg range L-W-H 5250 x 1500 x 1400 mm very good condition (!!) Current new price approx. 80,000 euros Special price on request Features: - Robust electro-hydraulic 4-roll bending machine * 4-roll concept offers a wide range of bending and rounding options - MG swivel control panel * Operation - control of all rolls and machine axes * Digital position display * Manual operation via joysticks - Two central rolls are driven directly by hydraulic motors - Conical rolling possible via inclined position of the rolls - Parallelism of the side rollers via torsion shafts - Bending on both sides - Diameters of up to 1.1 times the upper roller diameter are possible - Forged and hardened rollers with a strength of 53-55 HRC - Low-maintenance, stable machine concept - Permanent lubrication of all bearings - Stable steel welded construction - Electro-hydraulic folding bearing for easy pipe removal - Pressure gauge/pressure display for the rollers - Safety device (safety line with switch unit) Isdpfx Acjx Sr Dfjreic - Operating instructions (PDF)

Condition: new, neu ca. 12 Wochen ab Auftrags Türkei 28450 € 543.4 € 1550 mm 7 mm 7 mm 4.5 mm Iodpfx Acoyb Szhjrjic 4.5 mm 3.5 mm 150 mm 150 mm 130 mm 1,5 / 6 m/min 4 kW 3750 mm 960 mm 1100 mm 2500 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: (time of deliver with options approx. 10 weeks) 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, sheet width 1600 mm plate thickness 6 mm pre-bending 4 mm upper roll diameter 140 mm lower roll diameter 140 mm side roll diameter 120 mm min. bending diameter Oberwalzen-Ø x 3 total power requirement 3 kW weight of the machine ca. 2.000 kg Overall size 3700x1300x1280 mm Accessories / equipment: - Conical bending device - induction hardened rolls - digital display for side rollers - Machine made of steel construction - Separate control panel - two speeds - all rollers on ball bearings Isdoyv N E Ujpfx Acrsic - Folding and support bearing from the top roller is actuated from the control panel. When the folding bearing is opened, the roller moves automatically upwards. - Conical adjustment of the rollers via control panel - Central rollers are via hydraulic motor and rotary reduction gear driven. (Top and bottom rollers) - Calibration