Used Electric Welding Machine for sale (85,302)

Condition: used, TIG Welding Machine MESSER GRIESHEIM Type Combitig GW 23 AC/DC The machine only operates with direct current welding and contact ignition Serial No. 445276 Year of manufacture: approx. 1990 Output: 230 Amps = 35% duty cycle Bcsdpjdzqa Isfx Aa Uow 180 Amps = 60% duty cycle 140 Amps = 100% duty cycle Infinitely variable setting range Current type: DC Mains connection: 400 V, 50 Hz, 32 A plug - 2-stroke / 4-stroke welding mode - DC welding with contact ignition works - AC welding and high-frequency ignition do not work - 7 meter hose package with hand torch - Connection plug for remote potentiometer (foot pedal) – foot pedal not included - Air-cooled - Gas pressure regulator Required space (L x W x H): 850 x 480 x 600 mm Weight: approx. 90 kg The welding test shows good results when welding stainless steel with DC; the HF ignition does not work, but the arc can be ignited via brief contact. When welding aluminum with AC, no arc is formed.

Condition: used, Plasma cutting unit MB - Welding Technology Type Plasmaprof 50 Equivalent to CEBORA Machine no. 244311 Year of manufacture: approx. 1992 Power: 50 A = 35% duty cycle Bcjdpfxjdzqa Hj Aa Uew 30 A = 100% duty cycle Adjustment range: 2 steps Torch hose length: approx. 6 meters Compressed air connection: 4.7 bar Power supply: 400 Volt, 50 Hz, 32 Amp plug Installation dimensions (L x W x H): 500 x 350 x 700 mm Weight: approx. 80 kg Good condition

Condition: used, Welding turntable – Welding positioner with enclosure Circular welding device Load capacity approx. 50 kg Chuck diameter 300 mm Chuck rotational speed 1.0–15 rpm Power supply 230 Volts, 50 Hz - Spiral scroll chuck with internally stepped jaws - Infinitely variable speed adjustment via potentiometer - Drive via geared motor, rotation direction left - Start via electrical switch - Welding current transmission via slip ring contact - Extraction connection Ø 160 mm - Internal lighting Door opening W x H 715 x 1060 mm Internal dimensions W x D x H 780 x 780 x 1100 mm Required space W x D x H 900 x 900 x 2300 mm Bsdpfxodzp U Ij Aa Uecw Weight 190 kg

Condition: used, Spot welding machine DALEX type SL 16 EA Machine No. 68611900-5 Year of manufacture: 1986 Rated power at 50% duty cycle: 16 kVA Maximum welding power: 50 kVA Throat depth: max. 500 mm Electrode force: max. 17 - 278 daN Electrode arm diameter: Ø 45 mm Electrode holder diameter: Ø 25 mm Arm spacing: 140 mm / 280 mm Power switch: 8 stages Control: 4 times with single and series spots Operating pressure: 1-6 bar Open circuit voltage: 1.8 to 3.6 volts Connected load: 37 kVA Electrical connection: 400 Volt, 50 Hz - Welding cycle initiated via electric foot switch - Welding time infinitely adjustable - Water-cooled Space required (L x W x H): 1100 x 600 x 1200 mm Bodpswwaz Njfx Aa Ujcw Weight: 200 kg Good condition

Condition: used, Welding edge shaper, edge shaper, edge chamfering machine TRUMPF Chamfering of steel plates for weld seam preparation Type TKF 103 Sheet thickness: 4 - 25 mm Bevel length max: 10 mm Bevel angle: 30° Power: 2000 watts Mains connection: 220 Volt, 50 Hz - equipped with guide bracket for 30° bevel angle - resharpenable steel for high tool utilization Bedpfxodz Sq Ej Aa Uocw - Set up for 20 mm sheet metal For chamfering straight and curved edges with a radius of at least 40 mm. For chamfering edges on flat and curved workpieces as well as pipes with an internal diameter of at least 80 mm. Weight: 14 kg

Condition: refurbished (used), Year of construction: 2008, functionality: fully functional, Completely overhauled OPS Ingersoll Gantry 800 Eagle die-sinking EDM machine – mechanically and visually in top condition The machine has been thoroughly and professionally overhauled in our facility and is in excellent condition both technically and visually. During the overhaul, more than 70% of the machine was disassembled. All relevant wear parts were carefully inspected and replaced as necessary, including but not limited to ball rollers and drive spindles. A comprehensive geometric measurement, alignment, and additional verification using a laser measurement system were carried out afterwards. The machine bed as well as the entire base were thoroughly cleaned. All pumps were disassembled, cleaned, and overhauled. All hoses, including hydraulic and pneumatic hoses, have been completely renewed. Additionally, the machine has been completely repainted and is also visually in an extremely well-maintained condition. The generator and control system have been cleaned and technically checked. The generator’s climate control unit has also been cleaned to ensure reliable cooling and stable operation. Finally, the machine underwent extensive EDM testing in accordance with OPS Ingersoll’s quality and inspection standards. The machine is immediately ready for operation and ideally suited for reliable production use. Technical data: - Manufacturer: Ingersoll (OPS Ingersoll) - Type: Die-sinking EDM machine - Model: OPS INGERSOLL GANTRY EAGLE 800 - Year of manufacture: 2008 - Control system: EAGLE Powertec PC/NC 2060 - MultiProg Powertec technology programming on PC/NC - Powertec Easy Burn fast programming - Powertec Handheld – multifunctional manual control unit - Manual eroding with Powertec Handheld - High Speed Jump max. 18 m/min - Generator output: 60 Amperes, EAGLE Powertec - Travel distances (X, Y, Z): 550 x 850 x 450 mm - Electrode changer: 20-position pick-up carousel changer - Work tank (W x D x H): 800 x 1100 x 480 mm - Work table (W x D): 760 x 1000 mm - Table load capacity: 2,000 kg Accessories: - CO2 fire extinguishing system - Integrated cartridge filter system Special features: - Linear measuring system on all axes (Z-axis standard on series model) Bedpfx Aoykn Ngea Uecw

Condition: used, Year of construction: 2013, clamping force: 50 kN, displacement volume: 59 cm³, injection pressure: 2,500 bar, overall weight: 3,700 kg, load hours: 29,000 h, screw conveyor diameter: 25 mm, terms of delivery: EXW (ex Works) delivery time: on request terms of payment: 100% prior to delivery Manufacturer: Krauss Maffei Type: KM50-180AX Condition: aus laufender Produktion Operating hours: ca. 26.000 CLAMPING UNIT: - Clamping force: 50 t Öffnungsweg: 300 mm Mould installation height min.: 150 mm Mould installation height max.: 470 mm Tie bar distance (h x v): 410 x 360 mm Plate dimension (h x v): 510 x 460 mm Centering (fix- movingplate): 125 mm INJECTION UNIT: IU180 Screw diameter: 25 mm Injection weight in polystyrol: 54 g Stroke volume: 59 cm³ Einspritzdruck: 2.500 bar CONTROL: MC5 Screen language: DE Operating manuel: DE EQUIPMENT: - Core pulls: 2 x (Hydr. Kernzug-Aggregat) Bodoppigdspfx Aa Uocw Air valves: 2 Hot runner control devices: 6 Robot interface: Euromap 67 Other equipment: Qualitätsüberwachungspacket GENERAL DATA: - Installed heating capacity: 8,1 kW Pump drive power: entfällt Total installed power: Motor + Heizung Total weight: 3.700 kg Total size L x B x H: 4,4 x 1,6 x 1,9 m

Condition: like new (used), Year of construction: 2023, functionality: fully functional, input voltage: 230 V, ground cable length: 3,000 mm, warranty duration: 3 months, type of cooling: air, hose package length: 4,000 mm, welding current (min.): 5 A, welding current (max.): 200 A, For sale: Cjays Tig 200 DC Pulse 5-200 AMP 230 Volt Gas-cooled 2/4 Step Pulse Pre gas / Post gas Up slope / Down slope Start current / End current Elektrode option Steel + Stainless Steel weldable Bjdpfx Asyk Tnzsa Uocw test welding possible Including 4 Meter SR17 welding torch, earht work lead, gas cable, and 3 months warranty. Test welding is possible. A video of the machine in welding condition is possible. We also deliver to countries like Spain, Germany, Austria, Lithuania, Greece and all other countries inside and outside Europe with Euro pallets per freight. All our machines have been serviced and are 100% ready to use unless otherwise indicated. The pictures above show the real machine. We can also offer you other types of machines such as: Used, New, Mig, Mag, Co2, Tig, Pulse, AC/DC, Plasma, Water-cooled, Electrode, Brands we offer: OTC, Migatronic, Lincoln, Miller, Fronius, Kemppi, Parweld, Tico, Lorch, Rehm, Selco, Carl Cloos, Cebora, Esab, Saf, EWM, Ess, Kemper. You always do business with Cjays Lastechniek itself and never with third parties.

Condition: refurbished (used), Year of construction: 2013, travel distance X-axis: 550 mm, travel distance Y-axis: 850 mm, travel distance Z-axis: 450 mm, workpiece weight (max.): 2,000 kg, table width: 760 mm, distance table to quill: 585 mm, table length: 1,000 mm, workpiece length (max.): 1,095 mm, workpiece width (max.): 795 mm, workpiece height (max.): 480 mm, overall weight: 6,800 kg, year of last overhaul: 2025, table load: 2,000 kg, rapid traverse Z-axis: 18 m/min, Equipment: documentation/manual, OPS INGERSOLL GANTRY EAGLE 800 Overhauled Year of construction 2013 EAGLE Powertec PC/NC control 3060 22" screen with touchscreen operation MultiProg Powertec technology programming on PC/NC Powertec Easy Burn quick programming Powertec Handheld multifunctional manual control unit Manual eroding with Powertec Handheld EAGLE Powertec - PT 60 fine finishing generator, 60 amps Bedpfx Aajyi Uais Uscw High Speed Jump max. 18,000 mm / min. Travel (X, Y, Z) 550 x 850 x 450 mm Distance table / electrode chuck min. 135 mm / max. 585 mm Electrode changer 20-fold pick-up disk magazine Work bowl (W x D x H) 800 x 1,100 x 480 mm Work table (W x D) 760 x 1,000 mm Load capacity 2,000 kg Top load 200 kg Machine dimensions W x D x H 1,436 x 2,940 x 2,730 mm Integrated cartridge filter system Accessories: CO2 fire extinguishing system Electrode clamping system EROWA ITS , Hirschmann or System 3R (customer request) ECOTEC energy-saving function Standby mode for Gantry Eagle Multiprog Powertec technology programming on CD for external programming station

Condition: used, Welding transformer, high-current transformer, transformer for spot welding machines, projection welding machines, seam welding machines ELREX type 3x ET70.0.G Serial no. Year of manufacture approx. 1990 Comprising three water-cooled transformers with water-cooled rectifier block Technical data: Total rating at 50% duty cycle: 210 kVA (total output from 3 transformers) Bcodedzp Txopfx Aa Usw Secondary voltage: 7 – 10.5 volts (adjustable in 4 steps via terminal connectors on the transformer) Secondary current at 50% duty cycle: 20.1 kA (total from 3 transformers) Primary connection: 380 volts, 50 Hz (three-phase) Details per each transformer: Rating at 50% duty cycle: 70 kVA (per transformer) Secondary voltage: 7 – 10.5 volts (adjustable in 4 steps via terminal connectors on the transformer) Secondary current at 50% duty cycle: 6.7 kA (per transformer) Primary connection: 380 volts, 50 Hz (two-phase) Cooling water requirement per transformer: 4 liters/min. Insulation class: F - Water-cooled transformer - Water-cooled rectifier block mounted on secondary side - DC power output via contact surfaces 50x50mm with M20x1.5mm threaded holes - Temperature sensor on each rectifier element and on each transformer winding - Connection cable: 7-core, cross section 50 mm², length approx. 6 m Overall dimensions (WxHxD): 700 x 710 x 440 mm Total weight: 480 kg Good condition

Condition: used, functionality: fully functional, Spot Welding Machine Fab. Dalex Type SF 8 Technical Data Manufacturer: Dalex Type: SF 8 Rated power at 50% duty cycle: 8 kVA Bjdpfx Aajx Ic T Ae Ujcw Rated primary voltage: 380 V / 50 Hz Max. welding power: 23.7 kVA Max. short-circuit current: 8.8 kA Cooling water flow rate: 4 l/min Electrode force: 17 to 390 daN Open circuit voltage: 2 to 3.2 V Stages: 4 Throat depth: 235 mm Dimensions: L 750 x W 350 x H 1100 mm Weight: 77.5 kg All information without guarantee. A demonstration can be arranged at any time in our exhibition hall.

Condition: refurbished (used), Year of construction: 2006, travel distance X-axis: 1,000 mm, travel distance Y-axis: 1,500 mm, travel distance Z-axis: 650 mm, table width: 1,140 mm, table length: 1,640 mm, workpiece length (max.): 1,770 mm, workpiece width (max.): 1,270 mm, workpiece height (max.): 680 mm, feed rate Z-axis: 12 m/min, table load: 7,500 kg, Status: completely overhauled Control: Mitsubishi - 64 bit CNC Bcjdpjyh A Naefx Aa Uow Generator power: 70 amps - multipulse Travel paths (X, Y, Z): 1000 x 1500 x 650 mm Electrode changer: 30-way pick-up plate changer Work container (W x D x H): 1770 x 1270 x 680 mm Workpiece clamping table (W x D): 1640 x 1140 mm Load capacity: 7,500 kg Accessories: - CO2 fire extinguishing system - Cartridge filter system - HSJ technology (High Speed Jump)

Year of construction: 2025, operating hours: 50 h, condition: like new (used), functionality: fully functional, Schtec WD 720 Double-Headed Corner Welding Machine for PVC Profiles For sale: Schtec WD 720, a precise and reliable double-head welding machine for welding plastic window and door profiles. This machine welds two corners simultaneously in one operation and is suitable for variable angles from 60° to 180°. Thanks to its highly accurate welding tolerance of 0.2 mm, the WD 720 delivers strong, tight, and aesthetically perfect joints – suitable for both white and colored profiles. Key Features: • Simultaneous welding of two corners • Variable welding options between 60° – 180° • Can also be used as a single-head welding machine • 0.2 mm weld seam limitation (for white and colored profiles) • Manual positioning of the movable head • Pneumatic braking system for stable fixation • Individually adjustable heating, temperature, and time parameters • Digital touchscreen control panel • Special heating plates for uniform heat distribution • Easy cleaning system for the heating plates • Durable Teflon system for extended service life • Specially designed jig system for more efficient operations Application Bjdpfxsykkx Ds Aa Ujcw The Schtec WD 720 is ideal for medium-sized production companies seeking a reliable and precise welding solution. The combination of double-head welding, user-friendly operation, and high weld quality makes this machine suitable for series production of window frames.

Condition: used, Year of construction: 2025, operating hours: 200 h, functionality: fully functional, machine/vehicle number: 4 kopslasmachine Schtec, Equipment: 4 in one shovel, Schtec Four-Head Welding and CNC Corner Cleaning Line for uPVC Windows For sale: Professional four-head welding machine with CNC corner cleaning unit from the brand Schtec, suitable for the manufacturing of uPVC windows and doors. This complete line is configured for serial production and is fully adjusted for the Dutch market to work with Deceuninck profile systems. As a result, the machine can be deployed immediately in Dutch window production without any additional modification. Specifications and Features: - Four-head welding machine – simultaneous welding of all four corners Bodpfoykkw Tox Aa Uscw - CNC-controlled corner cleaning unit – clean, precise finishing - High dimensional accuracy and consistent weld quality - Suitable for various window and door sizes - Industrial design for continuous operation - User-friendly control system - Calibrated for Deceuninck profiles (Dutch market) This machine is ideal for companies looking to increase their production capacity or to upgrade and professionalize their current production line. The combination of four-head welding and automatic CNC cleaning delivers high output with minimal post-processing required.

Condition: used, functionality: unexamined, No. 453 Ess TM 30-151MS-1/2 No. 7/0501 Tool EI 84, BI210770 No. 454 Grau ASM 30-60 1990 No. 7.040.90, EI 30-60, BI210790 No. 455 Ess TM 30-122 Tool EI 66 TM 30-122 /S1/2-2/N4, No. 82/0701, Control PLS 510/MS54/82/0702 No. 456 Grau ASM 60-120, 1988, No. 8.020.88 BI210810 No. 457 ESS TMR /IA/S4/30-84 EI 84 Rotary Table No. 83/0137 Control Type PLS 511.03.MS 53, No. 83/0138 Tools EI 48,54,60,66,84,66/84 No. 478 Waasner TKSM/H No. 5709 EI 66, cooling unit and transformers missing Bcedpfeyntu Ajx Aa Ujw No. 479 Waasner TKSM/H. No. 5519 EI 66, cooling unit and transformers missing No. 480 Ess TM 30-151 MT-MS-40-4 No. 9/1105 9/1106 1979 MIG / MAG Tools EI 66, EI 78

Condition: not inspected (used), Year of construction: 1991, functionality: unexamined, machine/vehicle number: 14098/91, short-circuit current: 1,200 A, overall weight: 3,000 kg, total width: 2,400 mm, total height: 2,700 mm, total length: 2,500 mm, No reserve price – guaranteed sale to the highest bidder! Bidding requires timely collection between 08/04/26 and 16/04/26! MACHINE DETAILS Electrical Data Electrode force: 26,550 N Operating voltage: 380 V Connected load: 474 kVA Rated power: 3 x 50 kVA Rated current: 228 A Secondary voltage: 3.5 - 6.3 V Rated secondary current: 17,400 A Short-circuit current: 1,200 A Secondary short-circuit current: 92,000 A Mains frequency: 50 Hz Dimensions & Weight Dimensions (L x W x H): 2,500 x 2,400 x 2,700 mm Weight: 3,000 kg Bcedoyk Up Tjpfx Aa Uow

Condition: refurbished (used), functionality: fully functional, ground cable length: 4,000 mm, warranty duration: 3 months, type of cooling: air, hose package length: 8,000 mm, welding current (min.): 5 A, welding current (max.): 200 A, Parweld XTT202P ACDC – Gas-cooled TIG welding machine 3 Months Warranty Refurbished, tested, and ready-for-use Suitable for: Daily ACDC welding work under 5mm, hobby, DIY, novice professionals. Not suitable for: Production welding, machine construction, construction above 5mm Specifications: Bcjdpsyi Ubysfx Aa Ujw • 200 AMP • 230 Volt • ACDC • Pulse • 2/4 stroke • Gas before current / Gas after current • Start current / End current • Up slope / Down slope • AC Balance / AC Frequency • Pulse Frequency / Bi level • Electrode option Includes: 8 metre PRO26 welding torch, earth cable with clamp, gas hose, and trolley. Visits by appointment only. Test welding is possible. A video of the machine in welding condition is possible. We also deliver to countries like Spain, Germany, Austria, Lithuania, Greece and all other countries inside and outside Europe with Euro pallets per freight. All our machines have been serviced and are 100% ready to use unless otherwise indicated. The pictures above show the real machine. We can also offer you other types of machines such as: Used, New, Mig, Mag, Co2, Tig, Pulse, AC/DC, Plasma, Water-cooled, Electrode, Brands we offer: OTC, Migatronic, Lincoln, Miller, Fronius, Kemppi, Parweld, Tico, Lorch, Rehm, Selco, Carl Cloos, Cebora, Esab, Saf, EWM, Ess, Kemper. You always do business with Cjays Lastechniek itself and never with third parties.

Year of construction: 2011, condition: used, functionality: fully functional, machine/vehicle number: 425-00030/11, Soyer Stud Welding Machine Automatic stud feeder and SOYER BMS-10P-KU welding unit, including equipment. One head is equipped with lift-welding function, up to M12. Technical Data: - Threaded studs M3 - M8 up to length 40mm - Studs Ø3 - 8mm up to length 40mm - Welding sockets IG M3 - M6 Bcsdpfx Aajyn Dx Ee Usw Max. Travel Distances: X: 800mm Y: 1030mm Z: 150mm Defects: - Digital display for lift block 2 no longer functions (no functional limitation) - Spray unit head 2 is clogged (can currently be operated manually only) (nozzle needs to be cleaned/replaced)

Condition: used, Year of construction: 2012, clamping force: 100 kN, displacement volume: 201 cm³, injection pressure: 2,000 bar, overall weight: 5,400 kg, load hours: 55,400 h, screw conveyor diameter: 40 mm, terms of delivery: EXW (ex Works) delivery time: on request terms of payment: 100% prior to delivery Bcsdpfx Aajylpy Ae Uow

Condition: used, Year of construction: 2012, clamping force: 100 kN, displacement volume: 201 cm³, injection pressure: 2,000 bar, overall weight: 5,400 kg, load hours: 55,800 h, screw conveyor diameter: 40 mm, terms of delivery: EXW (ex Works) delivery time: on request Bcjdoylpyvopfx Aa Uew terms of payment: 100% prior to delivery

Year of construction: 2016, condition: ready for operation (used), An industrial TIG welding power source Merkle in AC/DC version is available. Insulation class: S, Cooling: AF, Voltage: 400V, Power factor: 0.95. Documentation available. An on-site inspection is possible. Bcodpfx Aaoynatro Usw

Condition: good (used), - Capacity 100 kVA - Pneumatic - Throat depth 570 mm Bcodpfjykcnqsx Aa Uow - 380 V

Condition: excellent (used), functionality: fully functional, WMA WMP 08 Spot Welders in TOP Condition, The unit shows barely any signs of use and has only been operated very occasionally. Air-cooled one-handed spot welding unit for vehicle manufacturing, tank construction, steel cabinet fabrication, sheet metal processing, and the wire industry. - Trouble-free welding of all sheet metals - Galvanized sheets can be welded perfectly thanks to controlled current rise and fall - Air-cooled, equipped for external water cooling - Tools can be easily changed using standardized rotating connectors - Only one plug required for welding current, control cable, and water cooling - Always reproducible welding results thanks to built-in automatic energy control Microprocessor Thyristor Control - Constant current regulation - Continuous process monitoring - Simple and ergonomic operation - All set parameters and process values are visible at a glance - Changes to welding parameters allowed only for authorized personnel - Management of configuration and program settings possible via a central PC WMA WMS 108 Microprocessor Thyristor Control - 7 time settings - 8 program slots - Built-in controller - Automatic mains frequency detection 50/60 Hz - Power outage-proof parameter storage - 'with/without current' toggle at the press of a button Additional configuration parameters (locked for user): - Program selection - Advance contact - Advance contact time - Two-hand lock (check) - Locking start signal - Current flow control - Response threshold - Current flow monitoring - Monitoring time - Current flow control - Power factor adjustment - Delay first half wave Bedpfx Asxrb Tgsa Ujcw External inputs (24V, DC stabilized and switching): - Thermal switch - Thyristor temperature - EMERGENCY STOP - Start 1 - Start 2* - Pressure contact - Program 1* - Program 2* - Pre-stroke ON - Program interruption after hold time (only force) - Two-hand lock (check)* * These functions can be activated or locked via configuration parameters. External outputs (24V, DC unstable ± 20%; + switching, max. 5 W): - Solenoid valve pre-stroke - Solenoid valve welding - Relay advance contact - Relay ready for operation Dispatch via freight carrier possible upon prior arrangement. #8407

Condition: good (used), Year of construction: 2014, Tecna 3484 Universal Spot Welding Station 8 kVA Bsdpfx Ajl Smn Sea Uecw Universal welding station 8 kVA, manually operated gun, double program. Simultaneous connection of two tools with automatic recall of the corresponding welding program, saving time and avoiding errors in terms of simple and safe work flow. Body repairs: resistance spot welding of sheet metal, smoothing with dent spotter (nails and washers), local heating (carbon electrode), screw and rivet welding, dent removal of stainless steel sheet. Synchronous SCR welding control, setting of welding time in cycles and pulses, setting of welding current and compensation function. Mains supply: 400V Mains frequency: 50 / 60 Hz Fuse: 25 A Rated power at 50 %ED: 8 kVA Max. Welding power: 35 kVA Max. Secondary current: 6,4 kA Heat current 100 %: 0,88 kA Year: 2014 Weight: 85 kg Financing through our bank is also possible. komplett-konzept.leasingo.de Further articles - new and used - you will find in our store! International shipping costs on request!

Condition: used, total width: 800 mm, total height: 1,600 mm, total length: 1,200 mm, Empty weight: 500 kg Bsdpfx Aaewyktno Ujcw - Documentation available: No - CE certificate present: No - Serial number: 4234 - Configuration: Pneumatic - Power [A]: 450 - Power [kVa]: 50 - Transport dimensions: 1200mm x 800mm x 1600mm (l x w x h) - Transport weight [kg]: 500kg - Transport packages [pcs.]: 1 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum