Used Welding Gun for sale (6,713)

Condition: reconditioned (used), Year of construction: 2023, load capacity: 6,000 kg, total height: 1,021 mm, total length: 2,940 mm, total width: 1,900 mm, The PX series welding positioner allows for safe lifting, rotation and tilting to the optimal position of elements for welding or assembly. The tilting cylinders are protected by a metal body, which protects them from mechanical damage or possible splinters created during welding. Specification: Dsdewcff Repfx Agfsur - Model: BEAR PX6000 - Lifting capacity: 6 tons - Rotation, tilt and lifting - Solid and reliable construction - Positioner powered by three-phase current - Table rotation using an electric turntable - Adjustment of the arm height and table tilt using hydraulic cylinders - Control of functions on the positioner housing Ideal for heavy welded elements

Condition: new, Year of construction: 2023, Positioner powered by three-phase current Rotation of table and arm by means of hydraulic swivels Height adjustment of the arm by means of a hydraulic cylinder Controlling functions on the positioner housing Useful in positioning parts in: welding cleaning assembly Increasing work efficiency up to 40% The use of unlimited rotation in 2 axes and, in addition, vertical and horizontal movement, allows any positioning of the attached workpiece (also "overhead"). Duedpfx Agjhtq Nzefjr The 3-axis positioner provides a significant improvement in work culture compared to traditional pan/tilt positioners (optimal positioning of the workpiece, easy operation). Advantages and benefits: For the employer: increased labor productivity by up to 40% through optimum positioning of workpieces - resulting in short amortization time of the device increased production efficiency does not require additional space on the shop floor better quality of welded joints - always possible to weld in the sub-lower position robust design of the device ensures long-term, trouble-free operation For the operator: ensuring ergonomic posture for the working person minimizing the risk of accidents - no changes in the fixing of objects no interruptions in work caused by waiting for the crane easy installation and operation It is possible to fully automate welding by using Kawasaki welding robots. We also offer positioners with a robot and integrated control system. ADDITIONAL OPTIONS: REMOTE CONTROL WITH CABLE TO OPERATE THE POSITIONER PEDAL WITH CABLE FOR OPERATING THE TABLE ROTATION STEPLESS ADJUSTMENT OF THE SPEED OF TABLE ROTATION AND ARM ROTATION FUNCTION OF CONSTANT TABLE ROTATION LENGTH AND SHAPE OF THE ARM SIZE AND SHAPE OF THE TABLE ROTATIONAL MASS We can make the positioner according to the customer's individual guidelines.

Condition: new, Year of construction: 2023, Positioner powered by three-phase current Rotation of table and arm by means of hydraulic swivels Height adjustment of the arm by means of a hydraulic cylinder Controlling functions on the positioner housing Useful in positioning parts in: welding cleaning assembly Increasing work efficiency up to 40% The use of unlimited rotation in 2 axes and, in addition, vertical and horizontal movement, allows any positioning of the attached workpiece (also "overhead"). The 3-axis positioner provides a significant improvement in work culture compared to traditional pan/tilt positioners (optimal positioning of the workpiece, easy operation). Advantages and benefits: For the employer: increased labor productivity by up to 40% through optimum positioning of workpieces - resulting in short amortization time of the device increased production efficiency does not require additional space on the shop floor better quality of welded joints - always possible to weld in the sub-lower position robust design of the device ensures long-term, trouble-free operation For the operator: ensuring ergonomic posture for the working person minimizing the risk of accidents - no changes in the fixing of objects no interruptions in work caused by waiting for the crane easy installation and operation It is possible to fully automate welding by using Kawasaki welding robots. We also offer positioners with a robot and integrated control system. ADDITIONAL OPTIONS: REMOTE CONTROL WITH CABLE TO OPERATE THE POSITIONER Dujdehzuvujpfx Agfsr PEDAL WITH CABLE FOR OPERATING THE TABLE ROTATION STEPLESS ADJUSTMENT OF THE SPEED OF TABLE ROTATION AND ARM ROTATION FUNCTION OF CONSTANT TABLE ROTATION LENGTH AND SHAPE OF THE ARM SIZE AND SHAPE OF THE TABLE ROTATIONAL MASS We can make the positioner according to the customer's individual guidelines.

Condition: excellent (used), Year of construction: 2019, 2-axis positioner - BEAR RT series Robot - Kawasaki BA006L from the year 2019 Dodpomu Agpjfx Agfsur Power source - Fronius TPS 400i from the year 2019 Robot and positioner in very good technical and visual condition - as shown in the photos. In continuous operation.

Condition: new, Year of construction: 2023, SPR type is the most popular and preferred line of our manipulators by customers. By moving the axis of rotation of the arm above the surface of the mounting plate, the weight of the support arm counterbalances the welding element. This technical solution gives a clear advantage over the PX and BE series. It allows for flexible positioning of the welded element (even "upside down"). STANDARD VERSION: Three-phase powered positioner Arm rotation using a hydraulic rotator Table rotation using an electric rotator Height adjustment of the arm using hydraulic cylinder Control of functions on the positioner case ADDITIONAL OPTIONS: Wired remote control Wireless remote control Pedal on the table rotation cable Smooth table rotation adjustment Rotation negative clamp (positioner case) Length and shape of the arm Possibility of individual configuration of the positioner Control of functions using a teach pendant Duodonqzm Dopfx Agfor

Year of construction: 2023, condition: new, Positioner powered by three-phase current Rotation of table and arm by means of hydraulic swivels Height adjustment of the arm by means of a hydraulic cylinder Controlling functions on the positioner housing Useful in positioning parts in: welding cleaning assembly Increasing work efficiency up to 40% The use of unlimited rotation in 2 axes and, in addition, vertical and horizontal movement, allows any positioning of the attached workpiece (also "overhead"). The 3-axis positioner provides a significant improvement in work culture compared to traditional pan/tilt positioners (optimal positioning of the workpiece, easy operation). Advantages and benefits: For the employer: increased labor productivity by up to 40% through optimum positioning of workpieces - resulting in short amortization time of the device Dodpfegmidujx Agfjur increased production efficiency does not require additional space on the shop floor better quality of welded joints - always possible to weld in the sub-lower position robust design of the device ensures long-term, trouble-free operation For the operator: ensuring ergonomic posture for the working person minimizing the risk of accidents - no changes in the fixing of objects no interruptions in work caused by waiting for the crane easy installation and operation It is possible to fully automate welding by using Kawasaki welding robots. We also offer positioners with a robot and integrated control system. ADDITIONAL OPTIONS: REMOTE CONTROL WITH CABLE TO OPERATE THE POSITIONER PEDAL WITH CABLE FOR OPERATING THE TABLE ROTATION STEPLESS ADJUSTMENT OF THE SPEED OF TABLE ROTATION AND ARM ROTATION FUNCTION OF CONSTANT TABLE ROTATION LENGTH AND SHAPE OF THE ARM SIZE AND SHAPE OF THE TABLE ROTATIONAL MASS We can make the positioner according to the customer's individual guidelines.

Year of construction: 2023, condition: new, Positioner powered by three-phase current Rotation of table and arm by means of hydraulic swivels Height adjustment of the arm by means of a hydraulic cylinder Controlling functions on the positioner housing Useful in positioning parts in: welding cleaning assembly Increasing work efficiency up to 40% The use of unlimited rotation in 2 axes and, in addition, vertical and horizontal movement, allows any positioning of the attached workpiece (also "overhead"). The 3-axis positioner provides a significant improvement in work culture compared to traditional pan/tilt positioners (optimal positioning of the workpiece, easy operation). Advantages and benefits: For the employer: increased labor productivity by up to 40% through optimum positioning of workpieces - resulting in short amortization time of the device increased production efficiency does not require additional space on the shop floor better quality of welded joints - always possible to weld in the sub-lower position robust design of the device ensures long-term, trouble-free operation For the operator: ensuring ergonomic posture for the working person Djdpfxohtq Rbs Agfour minimizing the risk of accidents - no changes in the fixing of objects no interruptions in work caused by waiting for the crane easy installation and operation It is possible to fully automate welding by using Kawasaki welding robots. We also offer positioners with a robot and integrated control system. ADDITIONAL OPTIONS: REMOTE CONTROL WITH CABLE TO OPERATE THE POSITIONER PEDAL WITH CABLE FOR OPERATING THE TABLE ROTATION STEPLESS ADJUSTMENT OF THE SPEED OF TABLE ROTATION AND ARM ROTATION FUNCTION OF CONSTANT TABLE ROTATION LENGTH AND SHAPE OF THE ARM SIZE AND SHAPE OF THE TABLE ROTATIONAL MASS We can make the positioner according to the customer's individual guidelines.

Year of construction: 2023, condition: new, Positioner powered by three-phase current Rotation of table and arm by means of hydraulic swivels Dusdpehzuv Hsfx Agfer Height adjustment of the arm by means of a hydraulic cylinder Controlling functions on the positioner housing Useful in positioning parts in: welding cleaning assembly Increasing work efficiency up to 40% The use of unlimited rotation in 2 axes and, in addition, vertical and horizontal movement, allows any positioning of the attached workpiece (also "overhead"). The 3-axis positioner provides a significant improvement in work culture compared to traditional pan/tilt positioners (optimal positioning of the workpiece, easy operation). Advantages and benefits: For the employer: increased labor productivity by up to 40% through optimum positioning of workpieces - resulting in short amortization time of the device increased production efficiency does not require additional space on the shop floor better quality of welded joints - always possible to weld in the sub-lower position robust design of the device ensures long-term, trouble-free operation For the operator: ensuring ergonomic posture for the working person minimizing the risk of accidents - no changes in the fixing of objects no interruptions in work caused by waiting for the crane easy installation and operation It is possible to fully automate welding by using Kawasaki welding robots. We also offer positioners with a robot and integrated control system. ADDITIONAL OPTIONS: REMOTE CONTROL WITH CABLE TO OPERATE THE POSITIONER PEDAL WITH CABLE FOR OPERATING THE TABLE ROTATION STEPLESS ADJUSTMENT OF THE SPEED OF TABLE ROTATION AND ARM ROTATION FUNCTION OF CONSTANT TABLE ROTATION LENGTH AND SHAPE OF THE ARM SIZE AND SHAPE OF THE TABLE ROTATIONAL MASS We can make the positioner according to the customer's individual guidelines.

Condition: new, Year of construction: 2023, Positioner powered by three-phase current Rotation of table and arm by means of hydraulic swivels Height adjustment of the arm by means of a hydraulic cylinder Controlling functions on the positioner housing Useful in positioning parts in: welding cleaning assembly Increasing work efficiency up to 40% The use of unlimited rotation in 2 axes and, in addition, vertical and horizontal movement, allows any positioning of the attached workpiece (also "overhead"). The 3-axis positioner provides a significant improvement in work culture compared to traditional pan/tilt positioners (optimal positioning of the workpiece, easy operation). Advantages and benefits: For the employer: increased labor productivity by up to 40% through optimum positioning of workpieces - resulting in short amortization time of the device increased production efficiency does not require additional space on the shop floor better quality of welded joints - always possible to weld in the sub-lower position robust design of the device ensures long-term, trouble-free operation Dodpjhzuwcofx Agfjur For the operator: ensuring ergonomic posture for the working person minimizing the risk of accidents - no changes in the fixing of objects no interruptions in work caused by waiting for the crane easy installation and operation It is possible to fully automate welding by using Kawasaki welding robots. We also offer positioners with a robot and integrated control system. ADDITIONAL OPTIONS: REMOTE CONTROL WITH CABLE TO OPERATE THE POSITIONER PEDAL WITH CABLE FOR OPERATING THE TABLE ROTATION STEPLESS ADJUSTMENT OF THE SPEED OF TABLE ROTATION AND ARM ROTATION FUNCTION OF CONSTANT TABLE ROTATION LENGTH AND SHAPE OF THE ARM SIZE AND SHAPE OF THE TABLE ROTATIONAL MASS We can make the positioner according to the customer's individual guidelines.

Year of construction: 2023, condition: new, Positioner powered by three-phase current Rotation of table and arm by means of hydraulic swivels Height adjustment of the arm by means of a hydraulic cylinder Controlling functions on the positioner housing Useful in positioning parts in: welding cleaning assembly Increasing work efficiency up to 40% The use of unlimited rotation in 2 axes and, in addition, vertical and horizontal movement, allows any positioning of the attached workpiece (also "overhead"). The 3-axis positioner provides a significant improvement in work culture compared to traditional pan/tilt positioners (optimal positioning of the workpiece, easy operation). Advantages and benefits: For the employer: increased labor productivity by up to 40% through optimum positioning of workpieces - resulting in short amortization time of the device increased production efficiency does not require additional space on the shop floor better quality of welded joints - always possible to weld in the sub-lower position robust design of the device ensures long-term, trouble-free operation For the operator: ensuring ergonomic posture for the working person minimizing the risk of accidents - no changes in the fixing of objects no interruptions in work caused by waiting for the crane easy installation and operation It is possible to fully automate welding by using Kawasaki welding robots. We also offer positioners with a robot and integrated control system. ADDITIONAL OPTIONS: REMOTE CONTROL WITH CABLE TO OPERATE THE POSITIONER PEDAL WITH CABLE FOR OPERATING THE TABLE ROTATION STEPLESS ADJUSTMENT OF THE SPEED OF TABLE ROTATION AND ARM ROTATION FUNCTION OF CONSTANT TABLE ROTATION Duodpfx Agsiuna Esfer LENGTH AND SHAPE OF THE ARM SIZE AND SHAPE OF THE TABLE ROTATIONAL MASS We can make the positioner according to the customer's individual guidelines.

Year of construction: 2023, condition: new, SPR type is the most popular and preferred line of our manipulators by customers. By moving the axis of rotation of the arm above the surface of the mounting plate, the weight of the support arm counterbalances the welding element. This technical solution gives a clear advantage over the PX and BE series. It allows for flexible positioning of the welded element (even "upside down"). STANDARD VERSION: Three-phase powered positioner Arm rotation using a hydraulic rotator Table rotation using an electric rotator Height adjustment of the arm using hydraulic cylinder Control of functions on the positioner case ADDITIONAL OPTIONS: Wired remote control Wireless remote control Pedal on the table rotation cable Dujdpfxenqzrpo Agfor Smooth table rotation adjustment Rotation negative clamp (positioner case) Length and shape of the arm Possibility of individual configuration of the positioner Control of functions using a teach pendant

Condition: good (used), Year of construction: 2020, functionality: fully functional, type of input current: three-phase, 🔥 FOR SALE: Fiber Laser Welding Machine — XTW-1000 (2020) A professional-grade fiber laser welding machine, model XTW-1000, manufactured in June 2020, is for sale. The machine is in excellent working condition and ready for immediate use. This unit is perfectly suited for precision welding of stainless steel, carbon steel, aluminum, copper, galvanized sheet, and various metal alloys. Laser welding is 4–10 times faster than conventional TIG/MIG welding, produces clean and smooth welds with minimal heat distortion, and requires little to no post-processing work. 📋 TECHNICAL SPECIFICATIONS • Model: XTW-1000 • Laser type: Fiber laser • Output power: 1000 W • Laser wavelength: 1080 nm • Laser spot size: 1–2 mm • Rated power: 7500 W Duodpfoyzcg Nsx Agfer • Supply voltage: 220V / 50Hz • Current: 30 A • Laser safety class: Class 4 • Serial number: 202005145 • Manufacturing date: 2020-06-01 • Certification: CE ✅ APPLICATIONS • Sheet metal processing & manufacturing • Stainless steel product & kitchen equipment fabrication • Automotive repair & bodywork • Elevator & staircase manufacturing • Tool & hardware production • Custom metalwork & repair workshops 📞 For further details and pricing — contact the seller!

Condition: used, table length 1500 mm table width 1500 mm table height 200 mm weight of the machine ca. 750 kg Dujdpfx Aeyy A Hmegfsr

Condition: used, Shielding Gas Welding Machine MIG-O-MAT Type U 405 Serial No. Year of manufacture 1991 Output 400 amps = 60% duty cycle 280 amps = 100% duty cycle Adjustment range 18 steps Torch hose length 5 meters Duedpfjyy Dfqsx Agfsr Power supply 380 V, 50 Hz, 32 amp plug - Spot and interval welding function - 2-stroke and 4-stroke welding functions - Wire feed with 2-roller drive - Water-cooled - Shielding gas pressure regulator - Supplied with 1.2 mm welding wire Dimensions L x W x H: 1300 x 500 x 900 mm Weight approx. 200 kg In good condition

Condition: excellent (used), Year of construction: 2017, Welding system with KUKA KR 16 L8 ARC HW welding robot, KRC4 controller, FRONIUS CMT welding machine, KP1-HC2000R1000 positioner, year of manufacture 2017 KR 16 L8 ARC HW welding robot Serial no.: 867100 Year of manufacture: 2017 Number of axes: 6 Djdpfx Agjyv Ex Defeur Reach: 2015 mm Payload: 8 kg Weight: 240 kg Controller: KRC4 Serial no.: 330800 KP1-HC2000R1000 positioner Serial no.: 152229 TransPuls Synergic 4000 CMT R welding machine Serial no.: 28245624 100% duty cycle: 320 A 60% duty cycle: 365 A 50% duty cycle: 400 A VR7000-CMT 4R/G/W/F++ wire feeder Safety system Torch cleaning station Reference run limit switch – Safe operation RotoLab – Torch angle correction Festo air preparation unit Pneumatic control unit Torch cleaning station

Condition: used, Welding fume extraction, filtration unit, dust extraction by LINCOLN NORWELD Central extraction system, extraction plant, silo filter, cartridge filter, pulse jet filter, dedusting filter Type FU-80-A Serial no. 001799 Year of manufacture: 1996 Airflow rate max. 6000 m³/h (depending on fan capacity) Filter area 80 m² (4 units of 20 m² each) Extraction inlet at filter entry Ø 250 mm Exhaust outlet at filter exit Ø 250 mm Compressed air connection 4 bar - without fan, without filter control - Filter category C, 99.9% separation efficiency - Pneumatic filter cleaning - Filter inlet with pneumatic shut-off valve - 4 used filter cartridges, Ø 325 mm, length 1200 mm - Service access hatch 240 x 240 mm Space required (L x W x H): 1400 x 1600 x 2970 mm Weight: approx. 300 kg In good condition Dodexf Up Iepfx Agfsur

Condition: excellent (used), Year of construction: 1996, ESAB LHF 400 Welding Rectifier / Electrode Welder Infinitely variable welding current range up to 400 A, power 400 A at 35% duty cycle, 315 A at 60% duty cycle, weight 165 kg, ... Dujdpfov N Hkcox Agfjr Siegfried Volz Machine Tools Rüschebrinkstr. 151-153 DE - 44143 Dortmund - Wambel

Condition: used, functionality: fully functional, type of input current: three-phase, total height: 670 mm, total width: 420 mm, total length: 800 mm, input voltage: 400 V, ground cable length: 4,000 mm, overall weight: 85 kg, hose package length: 3,500 mm, electrical fuse: 16 A, welding current (max.): 210 A, Equipment: type plate available, Fronius Vario-Star 210 MIG/MAG Shielded Gas Welding Machine 210 ampere shielded gas welding machine 3.5 meter torch hose package 4 meter ground cable 0.8 mm wire spool Pressure regulator Additional accessories for aluminum welding Operating manual with spare parts lists Technical Specifications: Maximum welding current: 210 A at 60% duty cycle 2-roll wire feed for steel / aluminum / stainless steel Ø 0.6 / 0.8 / 1.0 mm 10-step rotary switch for voltage selection Dodsyzztnepfx Agfjur Stepless wire feed adjustment 2T and 4T trigger modes Spot welding function Interval welding function AL2300 torch for 0.8 mm wire with 3.5 m gas-cooled hose package Connection: 3-phase, 400 V / 16 A Dimensions (L x W x H): 800 x 420 x 670 mm Weight: 85 kg Accessories: Various contact tips, nozzle holders, nozzles, stop for spot welding Including setup for aluminum welding: 1x aluminum wire spool 1 mm 2x feed rollers for 1 mm wire 1x AL2300 torch G/F/3.5m for 1 mm with 3.5 m gas-cooled hose package The machine is ideally suited for sheet metal welding and is often used in automotive repair workshops. It can also be used for rapid battery charging and jump-starting vehicles. The machine can be tested under power during our business hours or by appointment. Sale due to upcoming retirement.

Condition: excellent (used), Year of construction: 2013, operating hours: 1,50,494 h, functionality: fully functional, GRAF welding and cleaning line, year 2013. Working direction from left to right. SL4U four-head welding machine, max. dimensions 2800 x 3200 mm, min.400 mm, flash 0.2 mm. WP CNC 2 TR cleaning machine. Cooling station. Knives for cleaning flat, grooved and smooth surfaces. It has only performed 150,494 cycles - very good technical condition. Djdpfx Aeyyxvwogfour

Condition: good (used), Year of construction: 2007, functionality: fully functional, filter area: 64 m², suction capacity: 4,500 m³/h, negative pressure: 3,200 Pa, Dust extraction, welding fume extraction, cartridge filter self-cleaning, pneumatic, vacuum for plasma, laser , sandblasting, soda blasting, shot blasting and all kinds of dry dust. Brand : ESTA Model : DUSTEX F-64 The filter is cleaned by compressed air pulses during operation, which makes the device highly efficient. Fan on the clean side which reduces the risk of explosion to a minimum. Parameters : Capacity - 4500 m3/h Vacuum - 3200 Pa Filtration area - 64 m2 Cartridge filter cartridges - 4 pieces. 4 Kw motor. Inlet diameter - 280mm Complete with HEPA filter of filtration class H13 Dsdpjvkd Rpjfx Agfeur The device from the year 2007

Condition: good (used), Container rotating device, welding rotating device, welding rotating device, welding device, welding rotary table, welding rotary and tilting table, welding rotating device, welding rotary tilting table -Welding turning device: turning length 3130 mm -Turntable: Ø 800 mm Dedpfx Ajxm Sqrsgfjur -Peak height: 870 mm -Speed: electrically continuously variable 0-3 rpm -Drive: Servo motor 1/1.6 kW with cooling, see photo of nameplate -Direction of rotation: Right/left rotation -Transport dimensions: 3890/900/H1420 mm -Weight: 880 kg

Condition: good (used), Max. welding power 20 kVA Short circuit power 25 kVA Nominal power at 50 % ED 10 kVA Throat 500 mm Max. Secondary short circuit current 10 KA Connected load 15 kVA Dimensions W x D x H 400 x 1100 x 1150 mm Weight 200 kg Accessories / Special features: - Water cooling by external connection - Adjustable current time 0 - 10 - Adjustable electrode force by adjusting the spring - Mechanical foot switch Note / Reference value: With a max. secondary short-circuit current of 10 KA, a max. sheet thickness (normal sheet) of 2.5 mm can be welded. Siegfried Volz Machine Tools Dujdjfi Tl Hopfx Agfor Rüschebrinkstr. 151-153 D - 44143 Dortmund - Wambel

Condition: good (used), Welding current range - 200 A Weight: 158 kg Duedpfx Asfkpgdogfsr Accessories / Special features: - separate ESAB A 10 wire feed unit with 2-roll wire feeder - including hose package and ground cable Siegfried Volz Werkzeugmaschinen Rüschebrinkstr. 151-153 D - 44143 Dortmund - Wambel / Germany

Condition: used, tank capacity: 10,000 l, GENERAL INFORMATION Equipment: Level indicator (without guarantee) Design: vertical External diameter: 2,000 mm Internal diameter: 1,800 mm Total height: 5,200 mm Insulation: present Max. excess pressure: 5.00 bar Support type: height-adjustable feet Location: Bremen Technical documents: Drawing, TÜV certificates Nameplate: Volume: 10,000 liters Cylinder wall thickness: 5 mm Product-contacting material: V2A 1.4301 (AISI304) Condition: used Cylindrical height: 4,000 mm Previous use: Ice water tank in a dairy plant TANK Max. permitted operating temperature: 20 °C Number of feet: 4 pcs INSULATION Insulation jacket: hermetically welded Insulation jacket material: stainless steel EQUIPMENT Manhole / dome: in the cylinder Duedpjxqcpyofx Agfer Outlet: pipe end approx. Ø 40 mm Note: slight residues, outlet end cut off MATERIAL SPECIFICATION Feet material: stainless steel TECHNICAL DATA / DIMENSIONS Bottom wall thickness: 7 mm

Condition: used, GENERAL Heat exchange surface: 4.0 m² Insulation: available Other information: Heat exchange surface: 4 (2 x 2) m² Side A: Volume: 9 liters Permissible operating overpressure: 7 bar Permissible operating temperature: -40/+20°C Side B: Volume: 29 liters Permissible operating overpressure: 8 bar Permissible operating temperature: -40/+20°C Location: Bremen Nameplate: Condition: used Last application: Pharmaceutical chemistry Duedpoxqclbefx Agfor INSULATION Insulation material: Armaflex