Used Schmidt & Partners Cutting Kaitec Fiber Eco 1530 for sale (22,968)

Condition: new, functionality: fully functional, Year of construction: 2026, degree of automation: automatic, actuation type: electric, controller manufacturer: SUDA, controller model: Raytools, laser type: fiber laser, laser source manufacturer: Raycus, laser source model: Raycus 6000W, laser wavelength: 1,064 nm, sheet thickness (max.): 25 mm, sheet thickness steel (max.): 25 mm, sheet thickness stainless steel (max.): 16 mm, sheet thickness aluminum (max.): 14 mm, sheet thickness brass (max.): 8 mm, sheet thickness copper (max.): 6 mm, table length: 3,000 mm, table width: 1,500 mm, working length: 3,000 mm, working width: 1,500 mm, input voltage: 400 V, type of input current: three-phase, type of cooling: water, total length: 8,450 mm, total width: 2,950 mm, total height: 2,320 mm, Equipment: CE marking, centralized greasing system, cooling unit, documentation/manual, dust extraction, emergency stop, fume extraction, safety light barrier, FIBER LASER CUTTING MACHINE MTP F-6000 – 6000W High-performance fiber laser cutting machine designed for precise sheet metal processing. The MTP F-6000 combines a robust machine structure with high-quality components, ensuring excellent cutting quality, high working speed, and long service life. The machine is equipped with a 6000W laser source, an auto-focus cutting head, and a CNC control system. It is ideal for production plants, metal processing companies, and industrial workshops. The heat-treated frame structure ensures resistance to deformation and long-term precision. Key features: 6000W laser source Auto-focus cutting head CNC control system Linear guides Helical rack drive Rigid machine construction Automatic lubrication system Water cooling system Protective enclosure Advantages: High efficiency and cutting speed Excellent edge quality Low operating costs Easy operation Reliable continuous operation Applications: Steel structures production Kodpfxoyv Dx Aj Ah Aedp Sheet metal processing Automotive industry HVAC and ventilation Production of enclosures and metal parts Technical data: Model: MTP F-6000 Working area: 3000 × 1500 mm Laser power: 6000 W Cutting head: Auto Focus Control system: CNC Drive: Servo drives Guides: Linear Transmission: Helical rack Cooling: Water cooling system Lubrication: Automatic Construction: Welded, heat-treated frame Cutting capacity (6000W): Mild steel: up to approx. 25 mm Stainless steel: up to approx. 16 mm Aluminium: up to approx. 14 mm Standard equipment: 6000W laser source Auto-focus cutting head CNC control system Chiller Extraction system Working table Protective enclosure Optional equipment: Air compressor Dust extraction system Exchange table

Condition: new, Year of construction: 2025, Model: C3T Working Area: 3048mm*1524mm Laser Output Power: 6000w/3000w/2000w/1500w Positioning accuracy: ±0.05mm Repositioning accuracy: ±0.03mm Max. linkage speed: 100m/min Max. acceleration: 1G 1. Double Fast Exchange Tables Fast exchange of two tables greatly improves efficiency. Chain-drive system has better rigidity and higher accuracy, saving feeding time. 2. Tenon-and-mortise Welded Bed Use Chinese traditional Tenon-and-mortise structure to provide stronger bearing capacity. Solder joint fixing and structural bearing ensure long-standing operation stability. Welded structure improves shock absorption effect, lowering deviation caused by shock, and offering more accurate cutting. 3. Double Automatic Centering Electric Chucks Ksdpfx Aeg D Nz Reh Aodp Double electric chucks with automatic centering function are easy to operate and require little maintenance. Brand new motor gives accurate control. Modular chuck components are independently developed and can be quickly replaced. 4. Automatic focusing function of laser head By setting perforation focal length and cutting focal length respectively, the cutting is more accurate. Suitable for multiple focal lengths, and focal position will be automatically adjusted based on thickness of different sheets.

Condition: like new (used), Year of construction: 2020, functionality: fully functional, We present a fully automated fiber laser cutting system with integrated storage, robotic handling, and high-speed precision performance, designed for industrial production environments. KIMLA POWERCUT LF1530 Fiber Laser Cutting System (Fully Automated Line) Model: KIMLA POWERCUT LF1530 Manufacturer: KIMLA Year of manufacture: 2020 Compliance: CE certified Control system: Full CNC digital control Technical Specifications Installation length 12,500 mm Kdedoy Nwtyjpfx Ah Aop Installation width 7,200 mm Installation height 3,000 mm Nominal sheet size (X axis) 3000 mm Nominal sheet size (Y axis) 1500 mm Cutting area X axis 3050 mm Cutting area Y axis 1550 mm Cutting area Z axis 120 mm Max positioning speed (all axes) 230 m/min Max positioning speed (X/Y axes) 230 m/min Max positioning speed (Z axis) 70 m/min Acceleration (X/Y axes) 6G Repeatability 0.001 mm Positioning accuracy 0.002 mm Max workpiece weight 900 kg Laser source Fiber laser, 4000 W (IPG) Pulse frequency ±1–2500 Hz Total power consumption (excluding extraction & chiller) 30 kW Drive system Linear drives on all axes Optical linear encoders Yes Part measurement/scanning system RENISHAW or equivalent, inductive Automatic sheet loading/unloading & storage system Integrated, 12 positions, 2000 kg each Shuttle tables Yes, 3 Table exchange speed 1 m/s Tube cutting option Yes, on third pallet Dynamic motion control (trajectory optimization) Yes Robotic part handling system Yes, robotic arm with full integration Documentation English CE compliance Yes Control system Digital (CNC) Spare parts and tools Yes

Condition: new, functionality: fully functional, Year of construction: 2026, control type: CNC control, degree of automation: semi-automatic, actuation type: electric, Model: C3 Working Area: 3048mm*1524mm Laser Output Power: 40kW/30kW/22kW/20kW/12kW/6kW/3kW/2kW/1.5kW Positioning accuracy: ±0.05mm Repositioning accuracy: ±0.03mm Max. linkage speed: 110m/min Max. acceleration: 1.5G 1.Active Anti-collision Function Effectively reduce the damage rate of laser heads, help you save maintenance cost. 2.One-click Processing All functions of the system are distributed logically and orderly to achieve fully automatic mass production. 3.No Quiver when Cutting Thin Sheet C Series is capable of cutting edges of thin sheets and ensures no quivering marks. 4.Stretching Aluminum Crossbeam Kdjdpfog Iwypsx Ah Aep Rigidity increases by 60% Weight goes down by 20% Equipment running speed increases by 50% 5.Welded Bed with Tenon-and-mortise Joint Each frame of bed is welded after mortise-and-tenon joint to achieve better stability and firmness.

Condition: new, functionality: fully functional, Year of construction: 2025, control type: CNC control, controller manufacturer: Cypcut, laser type: fiber laser, laser source manufacturer: Max Photonics, laser power: 6,000 W, warranty duration: 24 months, Equipment: CE marking, STOCK MACHINE - IMMEDIATELY AVAILABLE New fiber lasers from the HLB series - optimized equipment with an eye on the essentials - low acquisition costs Max Photonics resonator, Raytools auto focus cutting head guarantee high-quality, competitive laser cutting with minimal maintenance costs FURNISHING: Cutting head: Raytools - Auto Focus Resonator 6KW Automatic changing table including light barriers Suction: Welldone CE certified Cypcut control with touchscreen including online programming directly on the control Sheet format 4,000mm x 2000mm Kedpsywufisfx Ah Aedp Connection value max. 30kW Installation area approx. 11,000mm x 4,000mm x 2,200mm The machine is included 24 month guarantee Installation Delivery within Germany and Software/operator training offered Optional: Offline programming CAD CAM software Libellula [CUT] Connect gases, electricity, done. In our exhibition we have various laser machines from our manufacturers under power and various materials for testing. We would be happy to invite you to come and cut your drawings or material. We, the company H+S, have been an exclusive trading company and service provider for YAWEI machines for 15 years, of which we have been selling their fiber lasers for around 8 years. We have already installed more than 300 fiber lasers from YAWEI. Come and see for yourself in your area. Call us and visit us!

Condition: new, functionality: fully functional, Year of construction: 2026, control type: CNC control, degree of automation: semi-automatic, actuation type: electric, All-round fiber laser metal tube cutting machine Multiple function options help the laser tube cutting machine be used in numerous tube cutting processes. The slender nozzle allows the laser tuber cutter to avoid interference and cut various types of tubes, including special-shaped tubes like H-Beam, P-Beam, I-beam, etc. Cutting machine clamping becomes convenient, easy and fast, with 3 seconds at the soonest to clamp and high repeat precision Cutting performance and efficiency are improved by maintaining gas flow steady with little turbulence. Kdsdshwrhbopfx Ah Aop BodorGenius, combined with the lightning-quick piercing process, completes the whole piercing during it moves down on Z-axis. Thanks to the technology, no reworking is necessary for medium and thick sheet piercing. Angle steel and channel steel cutting are standard with no need fior additional installation. Optimized edge searching method and algorithm guarantee higher cutting precision and better steadiness of the laser cutter. Condition: New Laser Type: Fiber Laser Laser Power: 1500W, 2000W, 3000W, 6000W Maximum machinable tube length: 6500mm/9200mm Chuck drive types: NC electric chuck Graphic Format Supported: AI, BMP, Dst, Dwg, DXF, DXP, LAS, PLT CNC or Not: Yes Cooling Mode: WATER COOLING

Condition: new, Year of construction: 2025, Working Area: 24500mm*3200mm Laser power: 40000w/30000w/20000w/12000w/6000w Kdsdog Dgbaspfx Ah Aop Applicable Material: metal Condition: New Laser Type: Fiber Laser Cutting Speed: 80m/min Graphic Format Supported: AI, BMP, Dst, Dwg, DXF, DXP, LAS, PLT Cooling Mode: WATER COOLING Certification: CCC, CE, GS, ISO, Sgs Laser Source Brand: IPG/MAX Warranty: 3 years 1.Ultra Large Cutting Area Maximum cutting area could be 24500mm*3200mm. 2.Active Anti-collision Function Effectively reduce the damage rate of laser heads, help you save maintenance cost. 3.Gas-saving Nozzle with Steady Flow Cutting performance and efficiency are improved by maintaining gas flow steady with least turbulence.

Condition: new, Year of construction: 2025, Model: CT Working Area: 3048mm*1524mm Laser Output Power: 6000w/3000w/2000w/1500w Positioning accuracy: ±0.05mm Repositioning accuracy: ±0.03mm Max. linkage speed: 100m/min Max. acceleration: 1G 1. Double Fast Exchange Tables Fast exchange of two tables greatly improves efficiency. Chain-drive system has better rigidity and higher accuracy, saving feeding time. 2. Tenon-and-mortise Welded Bed Kdjdpfx Aeg I H Iyeh Aep Use Chinese traditional Tenon-and-mortise structure to provide stronger bearing capacity. Solder joint fixing and structural bearing ensure long-standing operation stability. Welded structure improves shock absorption effect, lowering deviation caused by shock, and offering more accurate cutting. 3. Double Automatic Centering Electric Chucks Double electric chucks with automatic centering function are easy to operate and require little maintenance. Brand new motor gives accurate control. Modular chuck components are independently developed and can be quickly replaced. 4. Automatic focusing function of laser head By setting perforation focal length and cutting focal length respectively, the cutting is more accurate. Suitable for multiple focal lengths, and focal position will be automatically adjusted based on thickness of different sheets.

Condition: new, Year of construction: 2026, type of cooling: water, ELM3015 is a single-platform metal sheet fiber laser cutting machine. It adops an open design, and the whole plate-welded machine bed is stable and reliable. This machine has the advantages of fast cutting speed, good cutting effect, low operating cost, diverse processing, stability and so on. Available laser power range is 1500W. Higher powers on request. Kdjdsv N A A Uspfx Ah Aop The machine is delivered ready for operation.

Condition: new, Year of construction: 2026, For sale: FIBER LASER 1530 with a working area of 1550 x 3050 mm. Available with laser source power: 2kW, 3kW, 4kW, 6kW, 8kW, or 12kW. Available IMMEDIATELY! SPECIFICATION: Kodpfx Ahsn Nvxco Aodp Source from 2000W Linear drives BOSCH REXROTH Control system BOSCH REXROTH PRECITEC PROCUTTER laser head with autofocus Distance control system Vision system Pallet exchange system Full machine enclosure Nozzle cleaning system Remote service access #plotter #CNC #millingmachine #millingrouter #machiningcenter #3axis #4axis #5axis #3D #3Dprint #MDF #HPL #Plywood #chipboard #steel #aluminium #brass #stainlesssteel #castiron #polypropylene #polycarbonate #acrylic #fermacell

Condition: new, Year of construction: 2025, Dimensions (L/W/H) 7000x2300x2100 mm Kdedpfx Ajv A E T Aoh Asp Weight 3200 kg Total power requirement 28 kw

Condition: new, Year of construction: 2025, Dimensions (L/W/H) 3800x2300x2100 mm Weight 1900 kg Kdodpfxsv A Ha Rj Ah Aep Total power requirement 13 kw

Condition: new, Year of construction: 2025, Dimensions (L/W/H) 4000x2300x2100 mm Kdodpjv A E Tvefx Ah Ajp Weight 2300 kg Total power requirement 21 kw

Condition: new, functionality: fully functional, Year of construction: 2025, laser power: 30,000 W, travel distance X-axis: 3,050 mm, travel distance Y-axis: 13,050 mm, travel distance Z-axis: 450 mm, positioning accuracy: 0.03 mm, repeat accuracy: 0.02 mm, workpiece weight (max.): 2,000 kg, input voltage: 380 V, input frequency: 50 Hz, total length: 16,800 mm, total width: 2,200 mm, total height: 5,120 mm, warranty duration: 24 months, working range: 13,000 mm, Equipment: cooling unit, All New Full Cover Fiber Laser Cutting Machine | GS-CE PRO Series | 6000-40000W MACHINE AVAILABLE ON HAND This GS-CE series FULL COVER FIBER LASER CUTTING MACHINE offers maximum safety for metals cutting. Thanks to its full cover structure and protective glass observation window, you can observe the operation and avoid hazards such as laser radiation, sparks, etc. It also has a fast exchange table, and the exchange is within 10s. It will be your ideal solution for safe and efficient metal cutting! Working platform size: 4000mm*2000mm Laser power 6KW-40KW GS-4020CE PRO Intelligent anti-collision function Automatic lubrication Laser fault alarm Cooling fault alarm Laser protection glass Ksdpev Hnl Asfx Ah Aodp Water cooler TÜV CE certificate Optional function: automatic loading and unloading system Control unit supports graphic formats: AI, BMP, Dst, Dwg, DXF, DXP External programming System complete incl. cooler, extraction system and safety light barriers

Condition: new, Year of construction: 2025, Model: C3 Working Area: 3048mm*1524mm Laser Output Power: 40kW~1.5kW Positioning accuracy: ±0.05mm Repositioning accuracy: ±0.03mm Max. linkage speed: 110m/min Max. acceleration: 1.5G 1.Active Anti-collision Function Effectively reduce the damage rate of laser heads, help you save maintenance cost. 2.One-click Processing All functions of the system are distributed logically and orderly to achieve fully automatic mass production. 3.No Quiver when Cutting Thin Sheet C Series is capable of cutting edges of thin sheets and ensures no quivering marks. Kdodpfx Asg Rguysh Aep Ytyixk 4.Stretching Aluminum Crossbeam Rigidity increases by 60% Weight goes down by 20% Equipment running speed increases by 50% 5.Welded Bed with Tenon-and-mortise Joint Each frame of bed is welded after mortise-and-tenon joint to achieve better stability and firmness.

Condition: used, Fiber laser, fiber laser cutting system with flat bed and tube laser Laser cutting machine, laser cutting system, laser machine Manufacturer: DURMA Type: HD-F III 3015 III BH-IPG 2kW Serial No.: 822817712 Year of manufacture: 2017 with IPG laser source SIEMENS SL 840D + CAD software + nesting software Working area: 3000 x 1500 mm Kodpfx Aokdnv Tsh Asdp Tube cutting device: up to Ø 400 mm Laser power: 2000 watts (fiber laser) Output power: 0.2..2 kW Wavelength: 1070..1080 nm IPG power consumption: 6.4 kW/hour - Polarization random - Collimating focal length FC 100 mm - Focusing focal length FF 150 mm - Fiber diameter in single mode 50, 100, 200, 300 µm - Max. power consumption 42 kW - Power consumption machine 20 kW - Power consumption filter 4 kW - Power consumption cooler 10+1 kW - Power consumption resonator 7 kW Mild steel sheet thickness max. 12 mm - Stainless steel sheet thickness max. 6 mm - Aluminum sheet thickness max. 6 mm - Copper sheet thickness max. 3 mm - Brass sheet thickness max. 6 mm Working area X-axis 3060 mm Working area Y-axis 1530 mm Working area Z-axis 160 mm Sheet size max. 3048 x 1524 mm Sheet weight max. 200 kg/m² - IPG fiber laser resonator (see separate document) - Water cooling unit for laser source and cutting head (see separate document) - Under-table extraction and extraction filter system (see separate document) - with 2-position shuttle table - Tube laser with 4-jaw chuck and large spindle bore next to the flat bed - Guides for tube laser on linear guides - with CAD software - with nesting software - with tube laser software very good condition

Condition: ready for operation (used), Year of construction: 2015, - USED - FIBER LASER CUTTING MACHINE WITH PALLET CHANGER and LOADING/UNLOADING SYSTEM X-AXIS TRAVEL: 4000 mm Y-AXIS TRAVEL: 2000 mm Kjdpsxqtx Sjfx Ah Ajdp Z-AXIS TRAVEL: 115 mm RAPID FEEDS X-Y-Z: 245 m/min WORKING AREA: 4000 x 2000 mm ADMITTED LOAD ON TABLE: 1250 Kg SOURCE: TRUDISK 5001 ; 5000 W WEIGHT: 15000 Kg OVERALL DIMENSIONS: 10900 x 5700 x 2400 mm NOTE: LIFT MASTER COMPACT LOADING/UNLOADING SYSTEM

Year of construction: 2012, operating hours: 14,534 h, condition: ready for operation (used), General Data Machine weight 13000 kg Control Unit Brand BYSTRONIC Model ByVision Cutting Main Drive Laser power 3000 W Kedsx D R Ttopfx Ah Aedp Table Table load 750 kg This Bystronic Bysprint Fiber 3015 3kW was manufactured in 2012. It features a max laser power of 3,000 W and handles sheet sizes up to 3000 × 1500 mm. It supports a max cutting thickness of 20 mm for steel and 12 mm for stainless steel and aluminium. If you are looking to get high-quality cutting capabilities, consider the Bystronic Bysprint Fiber 3015 3kW machine we have for sale. Contact us for more information about this machine. Application Types Cutting

Condition: ready for operation (used), functionality: fully functional, Year of construction: 2019, operating hours: 13,265 h, sheet thickness steel (max.): 20 mm, sheet thickness stainless steel (max.): 15 mm, sheet thickness aluminum (max.): 15 mm, sheet thickness brass (max.): 6 mm, sheet thickness copper (max.): 6 mm, travel distance X-axis: 4,000 mm, travel distance Y-axis: 2,000 mm, TECHNICAL DETAILS X-axis: 4,000 mm Y-axis: 2,000 mm Maximum Speed: 140 m/min Control: SINUMERIK 840D SL Laser Excitation: Diode Module Chiller Unit: Air/Water LASER DATA - TRUDISK 3001 Laser Power: 3,000 W Sheet Thickness, Mild Steel: 20 mm Sheet Thickness, Stainless Steel: 15 mm Sheet Thickness, Aluminum: 15 mm Sheet Thickness, Copper: 6 mm Sheet Thickness, Brass: 6 mm MACHINE DETAILS Length: 11,150 mm Width: 6,650 mm Height: 2,200 mm Base Machine Weight: 12,000 kg Laser Beam On Time: 13,265 h (03.02.2023) Laser On Time: 3,172 h (03.02.2023) EQUIPMENT - Semi-automatic pallet changer - Laser beam guidance via fiber optic cable - Linear motor technology - Integrated control cabinets - Slag boxes - Laser diode positioning - TruDisk driven by machine - PierceLine - FocusLine - NitroLine - Transport and positioning device - Automatic nozzle cleaning - Universal laser cutting head - Protective window monitoring - ControlLine - Lens protective glass Kedpfexl T Rwsx Ah Aodp - Internet teleservice - Programmable gas pressure - FastLine - Multi-sheet processing - Condition monitor - Micro-welding - Central Link - CE certifications - Compact dust collector - Extraction unit - Automatic pallet changer (with light barriers)

Year of construction: 2025, condition: new, machine/vehicle number: AB2024, Pclass = working area X 1250mm x Y 1250mm x Z 25mm Kdsdpfx Ahsdvik Nj Aep skyCUBE P laser processing center - the new Pclass, more productive with a larger work surface than laser cutting machine for your metals Laser processing simple and high-precision - laser engraving, cutting at high speed and quality

Condition: new, Year of construction: 2026, Pclass = working area X 1250mm x Y 1250mm x Z 25mm Kdedecwph Tjpfx Ah Asp skyCUBE P laser processing center - the new Pclass, more productive with a larger work surface than laser cutting machine for your metals Laser processing simple and high-precision - laser engraving, cutting at high speed and quality

Condition: new, Year of construction: 2026, SL class = machining area X 1250 mm x Y 2500 mm x Z 100 mm High-precision linear motor axis system with 6 KW laser power (* Prices depending on equipment and laser power, this is a brand new laser machine from our production) Ksdpfx Ahek Ranzo Aodp Laser processing easy and high-precision - Laser cutting with high speed and quality

Condition: new, Year of construction: 2025, laser type: fiber laser, laser power: 6,000 W, laser wavelength: 1,064 nm, working length: 1,250 mm, working width: 1,250 mm, Equipment: CE marking, cooling unit, documentation/manual, P class = machining area X 1250 mm x Y 1250 mm x Z 100 mm Kedpfxek Ran Ee Ah Ajdp High-precision linear motor axis system with 6 kW laser power (* Prices vary depending on the configuration and laser power; this is a brand-new laser machine manufactured by us.) Laser machining: simple and highly precise – laser cutting with high speed and quality.

Condition: excellent (used), functionality: fully functional, Year of construction: 2018, Max. sheet size: 3000 x 1500 mm Fiber laser 3 kW Max. material thickness: Carbon steel: 20 mm, Stainless steel: 12 mm, Aluminum: 12 mm, Copper: 6 mm Accuracy: Repeatability ±0.05 mm Sheet change time: 27 sec. Cutting hours: 15400 h Length: 10495 mm Width: 6903 mm Height: 2880 mm Weight: 13000 kg Kjdjyr N Uajpfx Ah Aedp

Condition: excellent (used), functionality: fully functional, Year of construction: 2022, operating hours: 11,500 h, machine/vehicle number: 3098, laser hours: 6,900 h, laser power: 10,000 W, sheet thickness (max.): 30 mm, sheet thickness steel (max.): 30 mm, power: 10 kW (13.60 HP), year of last overhaul: 2024, working range: 4,020 mm, Equipment: cooling unit, documentation/manual, safety light barrier, MSF Pro 4001.20LB MicroStep CNC cutting system from the MSF Pro series with the following features: • 2D laser cutting head with an IPG YLS 10000 U fiber laser source • Fully automatic shuttle table • Fully automatic HSK 63 drilling spindle • Powerful Donaldson DFPRO 6 filter system with 7.5 kW Technical specifications: Machine designation: MSF Pro 4001.20LB Working area: approx. 4,000 x 2,000 mm Guides: high-precision linear guides Ksdpovw Tdlsfx Ah Asdp Drives: maintenance-free Panasonic AC servo motors Transverse speed: up to 100,000 mm/min Measuring system: IRC 2500 (incremental encoder) Z-axis positioning speed: 18 m/min Z-axis travel range: 150 mm Acceleration Z-axis: 0.75 G Positioning accuracy (Pa*): 0.07 mm according to VDI/DGQ 3441 Repeatability (Ps*): 0.03 mm according to VDI/DGQ 3441 Ambient temperature: +10 °C to +35 °C Relative humidity: 0 to 90% EX-TRABEAM® Pro laser cutting head Cleaning and calibration station (LU3K) Automatic nozzle changer (8 nozzles) Fully automatic drilling spindle Technical specifications: Drilling from/to: Ø 4 mm - Ø 30 mm Threading from/to: M5 - M20 Max. material thickness: up to 25 mm* Power: 21 kW Revolutions: up to 10,000 rpm Tool cooling: internal cooling Tool change: automatic Automatic drilling tool measurement Pneumatic hold-down device Brush For removing drilling chips Donaldson® DFPRO 6 Cyclopeel filter system Fan power: 7.5 kW Flow rate: 4,500 m³/h Asper Nesting® | Automatic nesting software With witt Gas Mixer Machine has always been operated under a maintenance and support contract