Used Mfp Fördertechnik 2500 X 250 for sale (66,743)

Condition: used, Year of construction: 2019, operating hours: 1 h, machine/vehicle number: FGWGS854AAD300112, fuel type: diesel, motor manufacturer: Perkins 4016-61TRG3, General information Field of application: Construction Weights Empty weight: 13.380 kg Functional Generator capacity: 2.500 kVA Dimensions of cargo space: 604 x 218 x 290 cm CE mark: yes Other information Fuel consumption: 350.8 L/Hour at 75% Load Prime Generator: Leroy Somer LL9324P Frequency: 50 Voltage: 400 Drill equipment: Battery, Control Panel Production country: CN Lredpfx Acjxtzbmj Aen Additional information Please contact Team DPX for more information = Additional options and accessories = - Battery - Control Panel = Remarks = New and unused 2019 generator set with 0 running hours.

Condition: new, Year of construction: 2025, fuel type: diesel, power: 2,000 kW (2,719.24 HP), motor manufacturer: Perkins 4016-61TRG3, General information Field of application: Construction Weights Empty weight: 13.380 kg Functional Generator capacity: 2.500 kVA Lrsdpfxjwbnhlo Ac Asn Dimensions of cargo space: 604 x 218 x 290 cm CE mark: yes Other information Fuel consumption: 350.8 L/Hour at 75% Load Prime Generator: Leroy Somer LL9324P Frequency: 50 Voltage: 400 Drill equipment: Battery, Control Panel Production country: CN Additional information Please contact Team DPX for more information = Additional options and accessories = - Battery - Control Panel

Condition: excellent (used), Year of construction: 2017, Fastems FMS ONE-XMD-2500 Flexible Manufacturing System with Fastems 8760 MMS Control Ledpfx Ajym A Tljc Ajrn Pallet Dimension 1,000 x 800mm. Pallet Capacity 20 Positions. Maximum Load Ø1,500mm. Maximum Load Height 1,676mm (Including Pallet). Maximum Load Size Ø1,500mm x 1,310mm. Maximum Load Weight 1,850kg (Including Pallet) System. Length 21,960mm. Storage Length 21,600mm. Storage Height 5,106mm. Crane Height 4,976mm/ 4 Bespoke Fixtures & 8 Pallet Bases Included. Please Note: Tombstones Not Included. System Was Last Fully Serviced In 2025, The Only Work Undertaken Was The Precautionary Replacement Of Rails. S/No.29062 (2017). The system will be decommissioned by the OEM, Fastems, which will be at the buyers co

Condition: ready for operation (used), Year of construction: 2019, operating hours: 2,809 h, functionality: fully functional, machine/vehicle number: 7023000520B, turning length: 705 mm, travel distance X-axis: 260 mm, travel distance Y-axis: 50 mm, travel distance Z-axis: 795 mm, swing diameter over cross slide: 742 mm, swing diameter over bed slide: 920 mm, Attention – Images of milling accessories belonging to other machines were mistakenly included in this auction listing and have now been removed. Please refer to the updated scope of delivery as per the current images – approximately half of the accessories shown pertain to this machine. TECHNICAL DETAILS Working Area Swing diameter over bed max.: 920 mm Swing diameter over cross slide max.: 742 mm Max. turning length: 705 mm Bar capacity: 80 mm Travel X-axis: 260 mm Travel Y-axis: 50 mm Travel Z-axis: 795 mm Main Spindle Power: 18.5/15 kW Max. speed: 4,000 rpm Chuck size: 10 inch Spindle bore: 91 mm Front bearing diameter: 140 mm Counter Spindle Power: 11/7.5 kW Max. speed: 4,000 rpm Lodpfxey Rxtwe Ac Aern Chuck size: 6 inch Spindle bore: 45 mm Front bearing diameter: 85 mm Turret and Axes Tool stations: 12 Shank cross-section: 25 mm Max. speed of driven tools: 10,000 rpm Rapid traverse X-axis: 30,000 mm/min Rapid traverse Y-axis: 10,000 mm/min Rapid traverse Z-axis: 30,000 mm/min Rapid traverse B-axis: 30,000 mm/min MACHINE DETAILS Control: M730UM with CELOS Operating hours: 2,770 h Power-on hours: 10,820 h Dimensions & Weight Machine height: 2,000 mm Installation footprint: 3,347 x 2,106 mm Weight: 5,820 kg EQUIPMENT Y-axis Counter spindle Main spindle with 10-inch chuck Counter spindle with 6-inch chuck Chip conveyor High-pressure coolant system Tool measuring device Parts catcher Workpiece ejector Interface for bar loader

Condition: new, Year of construction: 2020, PRICE: 2500 EUR Type: S 120 l Complete stainless steel Hopper capacity 120 liter Single working shaft Rotation of shaft in both directions Protection cover Electric power: 3 kW Voltage: 220 V / 50 Hz Installation dimensions of machine in cm: Width: 91 Lodpfx Aof S A Ivoc Asrn Lenght: 65 Height: 87 Delivery time: after advanced payment, one working day

Condition: good (used), spindle bore 80 mm distance between centers 2500 mm weight approx. 4500 kg swing diameter 880 mm 4.5/900 rpm length 490 cm Lodpfx Asw Rcgmoc Asrn height 145 cm width 150 cm digital readout on X and Z axes rapid traverse sold with 3-jaw chuck, 4-jaw chuck, and steady rest

Condition: like new (used), Year of construction: 2009, functionality: fully functional, We are selling this grinding machine, which is connected and available for testing. Lrjdpfxoxxrzzo Ac Aon Machine parameters: - Grinding of rotational parts clamped between centers with an accuracy of 0.001 mm - Max. swing diameter: 0–1,450 mm - Max. turning length: 6,000 mm - Max. workpiece weight: 20,000 kg (25,000 kg with steady rests) - Grinding wheel diameter: 915 mm - Wheel width: 100 mm - Non-contact measurement of dimensions, tolerances, and workpiece geometry, including printout of measurement protocol - 100% ultrasonic measurement possible - CNC control with capability for profile grinding (taper, concave and convex, CVC) - Grinding of ceramic and metallic coatings using diamond and ceramic grinding wheels The machine is currently completing an order.

Condition: excellent (used), Year of construction: 2011, machine/vehicle number: WIL134, Demag EPKE Overhead Crane Gantry Crane Bridge Crane incl. Steel Structure + Pendant Control Steel Structure Dimensions approx.: Length 44m x Width 11.2m, with 1x bridge crane 2,500kg Lifting height 6m, lifting speed 0.8/4.5m/min, reeving 4/1 Payload/Lifting Capacity: 2.5t - 2,500kg Technical Data of the System: Crane runway/steel construction consisting of HEA/HEB180/240 beams, running rails HEB280 Length outer edge steel structure: approx. 44m Total width outer edge (steel structure): approx. 11.2m Overall crane height: approx. 5.2m Top of rail: approx. 4.87m Bottom of rail: approx. 4.59m Top of bridge: approx. 4.52m Bottom of bridge: approx. 4.83m Hook height: approx. 4.3m Crane gauge: approx. 10.8m Column spacing: to be advised Some columns are partially set in concrete; these will be cut 5cm below the top edge of the floor! System is supplied complete: Steel structure fully assembled incl. conductor rail 1x bridge incl. travel drives and hoist Demag DR 2.5t NL Crane is dismantled and immediately available. The item is located at 75053 Gondelsheim Very good condition, see pictures Shipping by freight carrier or self-collection by appointment only. Lodpow Ixz Uofx Ac Aorn

Condition: excellent (used), Year of construction: 2020, operating hours: 2,139 h, functionality: fully functional, machine/vehicle number: NL257200651, turning length: 700 mm, turning diameter: 366 mm, spindle motor power: 19 W, spindle speed (max.): 4,000 rpm, spindle bore: 91 mm, travel distance X-axis: 260 mm, travel distance Z-axis: 795 mm, overall weight: 5,800 kg, We are offering this very well-maintained and low-hour DMG MORI NLX 2500/700 CNC turning and milling center, year of manufacture 2020. Manufacturer: DMG MORI Model: NLX 2500/700 Year: 2020 Condition: Excellent Category ID: 1128 Type ID: 2239 Ledpjyxglkefx Ac Aorn Type: CNC Turning and Milling Center Machine hours: 7,598 h Program runtime: 2,139 h Details: Base machine: NLX 2500/700 with driven tools and C-axis Universal lathe with 3 axes Turning length: 700 mm Main spindle with integrated motor spindle ISM 80 (bar capacity in mm) AC motor with 15 / 18.5 / 18.5 kW power (100% / 50% / 25% duty cycle) 4,000 rpm Hydraulic clamping system (see clamping cylinder/chuck) C-axis with hydraulic spindle brake 10-station BMT turret 10-station driven tool turret NC tailstock CELOS® with Mitsubishi control M730UM Control: Mitsubishi M730UM controller with CELOS CELOS - ERGOline Touch Spindle: Main spindle (Spindle 1) standard Spindle options: Oil blower cooler for circulating coolant oil Chuck for main spindle: Main spindle (Spindle 1) 10" hollow chuck Ø254 mm Main spindle (Spindle 1) hollow clamping cylinder for 10" chuck Ø254 mm BB210A821 Chuck options: Double foot switch with protective cover Tool turret: Rotating tools with 40/14 Nm, 10,000 rpm 12-station BMT60 turret for MC configuration Overhang for driven tools 100 mm (limited Y-axis travel) Tailstock: NC tailstock taper for live center MK 5 (live center not included) Coolant / Chip removal: Use of water-soluble coolant (emulsion) Hinged belt chip conveyor, discharge right (500,700) Coolant system with increased pressure, 5 bar I/F for oil mist separator (extraction opening Ø 150 mm + electrical components) (AFS 1100) AFS 1100 oil mist separator Measuring / Monitoring: Manual tool presetter (swiveling, standard) Additional options: Customer voltage: 380 V Frequency: 50 Hz Metric setting SCHNEIDER transformer 45 kVA Technology cycles: Alternating spindle speed Control options: X-axis direction ISO Last maintenance: April 2024

Condition: new, 16000 kg length 6000 mm width 2500 mm loading area height 700 mm Heavy-duty trailer - industrial trailer - Made in Germany - Available immediately from stock Frame: - Frame made of stable profile steel - Platform made of impregnated softwood - Protected all around with a steel edge, statically designed Lrsdshrrp Rspfx Ac Asn - 6 lashing rings welded on Steering: - The steering takes place via 2 axles with Ackermann steering - the steering drawbar is removable and can be hooked in on both sides - Steering angle approx. 42° - all rotating parts are with maintenance-free slide bearings (lubricated for life) Equipped with ball bearings - Towing eye: 40 mm Ø with wear ring - Fork support height adjustment for better coupling to the towing vehicle Wheels - the trailer is equipped with 4 heavy-duty wheels with elastic rubber covering Ø425mm, total width 300mm and ball bearings.

Condition: like new (used), 24000 kg length 5000 mm width 2500 mm loading area height 700 mm Lrjdpsxcuyusfx Ac Aon

Condition: good (used), Year of construction: 2019, operating hours: 14,085 h, lifting height: 3,250 mm, fuel type: electric, mast type: duplex, battery manufacturer: Hawker, battery capacity: 775 Ah, battery voltage: 80 V, fork length: 1,200 mm, Weights Empty weight: 5.280 kg Battery Battery: 775 Ah, 80 V, Year of manufacture 2019, Brand of battery Hawker Functional Lredpfjv S E Rtox Ac Aen Lifting capacity: 2.500 kg Number of valves: 3 CE mark: yes Maintenance, history and condition Number of owners: 1 Technical condition: good Visual appearance: good Other information Fork carriage: Sideshifter Additional information Please contact Bas Sindorf for more information

Condition: ready for operation (used), Year of construction: 2016, functionality: fully functional, machine/vehicle number: 7024NL256160890J, spindle speed (max.): 10,000 rpm, travel distance Y-axis: 200 mm, rotational speed (max.): 4,000 rpm, bar diameter (max.): 80 mm, distance between centers: 700 mm, Condition: Ball screw drives in X, Y, and Z axes replaced; major maintenance package carried out approx. one year ago (machine has not been in operation since)! TECHNICAL DETAILS Distance between centers: 700 mm Spindle speed range: 1 - 4,000 rpm Tool spindle speed: 10,000 rpm Bar capacity: 80 mm Mounting: MT5, revolving tailstock Without center Turret: 12 stations, bolt-on turret Overhang for driven tools: ±100 mm Assemblies: Integrated MK4 bearing for live center Chip and coolant system: Scraper-type chip conveyor with magnetic separator, discharge height approx. 1,000 mm Coolant system: high pressure 5 bar, pump 800 W, delivery rate 20 l/min Coolant shower at chuck, including high-performance pump Compressed air blow-off system for tool holder sleeves Compressed air blow-off system for tailstock live center Line filter for coolant system MACHINE DETAILS Control: M730UM, CELOS - ERGOline Touch Ljdpfx Acjy A Icrs Asrn Total power: 18.5 / 18.5 / 15 kW (25% duty cycle / 50% duty cycle / continuous) Tool spindle power: 5.5 / 5.3 / 7 kW (3 min / 5 min / continuous) EQUIPMENT Interface for oil mist separator (diameter: 150 mm) Signal beacon: red, yellow, green, blue EtherNet/IP interface for automation Robot interface for portal robot DMG Mori Seiki Transformer: 45 kVA, three-phase autotransformer X-axis direction ISO Note: The machine is supplied without a chuck, tool pre-setter, or workholding devices.

Condition: new, empty load weight: 500 kg, maximum load weight: 2,000 kg, overall weight: 2,500 kg, loading space length: 4,400 mm, loading space width: 1,900 mm, loading space height: 180 mm, tire size: 185/70r13, Car transporter from the manufacturer ANSSEMS, model AMT2500.440x190. As standard equipment, the Anssems car trailer features an aluminum floor, lashing eyes on the outside of the frame and on the top of the side panel, aluminum loading ramps that can be slid under the loading platform, low chassis, detachable sideboards at the front and rear that can be used as wheel chocks, a winch adjustable and extendable on the left and right sides, a rear support set, a support wheel, and a V-shaped drawbar. We also offer accessories for Anssems car transport trailers, such as a tarpaulin cover, wheel chocks, a toolbox, car tie-down straps, and anti-theft devices. --- You can find all our cost-effective offers on our website. Lrodpfxjf Dtx Se Ac Ajn --- Delivery throughout Germany is possible (except for the islands)! Please ask us for the corresponding prices. --- PKW-Anhänger-Center Ahrens, Moordeicher Landstraße 37, 28816 Stuhr near Bremen, Tel: 0, Fax: Pickup times: Monday - Friday – hours Pickup is not possible on Saturdays!

Condition: new, empty load weight: 410 kg, maximum load weight: 2,090 kg, overall weight: 2,500 kg, loading space length: 3,010 mm, loading space width: 1,500 mm, loading space height: 350 mm, tire size: 185/70R13, Sturdy braked low-loader with tandem axle from the manufacturer ANSSEMS model BSX2500 301x150. As standard equipment, the Anssems box trailer with brake has aluminum side walls, internal locks, external lashing eyes, profile channels for mounting accessories or load securing, very stable welded steel frame, railing on the side, front high frame, front flap, pull-out supports for tailgate, support wheel and a V-drawbar. Lrjdpsrz Rydefx Ac Asn We also offer accessories for Anssems car trailers such as tarpaulin and frame, flat tarpaulin, net hooks, grid attachment, side wall attachment, rear support set, tool box, lashing eyes, straps and lock.

Condition: new, empty load weight: 490 kg, maximum load weight: 2,500 kg, overall weight: 2,500 kg, loading space length: 4,050 mm, loading space width: 1,780 mm, loading space height: 300 mm, tire size: 185/70R13, Felge schwarz, High loader tandem from the manufacturer ANSSEMS model PSX2500 405x178 Go-Getter. Lodpfxoq Rfk De Ac Aorn The standard equipment of the Anssems flatbed high loader with brake includes aluminum drop sides, all folding and removable, stable eccentric locks, lashing eyes on the outside and inside, profile channels for mounting accessories or load securing, very stable welded steel frame, pull-out supports for tailgate, support wheel and a V-drawbar. We also offer accessories for Anssems car trailers such as high tarpaulin, flat tarpaulin, net hooks, grid attachment, side wall attachment, rear support set, accessory box, straps and anti-theft device.

Condition: new, empty load weight: 580 kg, maximum load weight: 1,920 kg, overall weight: 2,500 kg, axle configuration: 1 axle, loading space length: 3,001 mm, loading space width: 151 mm, loading space height: 153 mm, loading space volume: 7 m³, suspension: other, tire size: 185/70r13, Covered trailer, braked low-loader tandem from the manufacturer ANSSEMS, model GTT2500, 301x151 VT3. As standard equipment, the Anssems box trailer with brakes features a lockable cover with railing, aluminum side panels, a ramp, internal latches, adjustable lashing eyes, profile channels for attaching accessories or securing the load, a support wheel, and a V-drawbar. Financing: Available with NO down payment!!! Other sizes, configurations, and more affordable models can be found in our shop: ----- All our cost-effective offers can also be found on our website. Ledpfxef Nt D Ro Ac Aorn Delivery throughout Germany (except to the islands) is possible! Please ask us for prices. ----- PKW-Anhänger-Center Ahrens, Moordeicher Landstraße 37, 28816 Stuhr near Bremen, Tel: 0, Fax: Pick-up times: Monday - Friday – [Time] Pick-up is not possible on Saturdays!

Condition: ready for operation (used), Year of construction: 2008, operating hours: 56,089 h, Swing diameter over bed/cross slide: 820mm/550mm, distance between centers: 2666mm, max. turning diameter: 610mm, max. workpiece length: 2500mm, travel X/Z: 410mm/2560mm, travel Y: -80mm/100mm, max. workpiece weight without/with tailstock: 500kg/1500kg, tool positions: 12, rapid traverse X/Z/Y: 24m/30m/12m/min, feed force X/Z/Y: 17kN/20kN/17kN. Machine dimensions X/Y/Z: approx. 5500mm/2250mm/2550mm, weight: approx. 15000kg, operating hours: approx. 56089. Documentation available. An on-site inspection is possible. Expected to be available from mid-2026. Lrsdpfx Ajw Dfhuec Ajn

Condition: ready for operation (used), Year of construction: 2020, functionality: fully functional, machine/vehicle number: NTX26200912, turning length: 1,530 mm, turning diameter: 670 mm, spindle speed (max.): 12,000 rpm, travel distance X-axis: 675 mm, travel distance Y-axis: 300 mm, travel distance Z-axis: 40 mm, rotational speed (max.): 4,000 rpm, number of slots in tool magazine: 76, Simultaneous 5-axis machining with direct drive (DDM) in the B-axis Ledpjyap Shsfx Ac Ajrn HIGHLIGHTS Milling spindle: compactMASTER with the shortest length of 350 mm Machining option: 6-sided complete machining thanks to powerful counter spindle TECHNICAL DETAILS X1-axis travel: 675 mm (+550 / -125 mm) Y1-axis travel: 300 mm (+/-150 mm) Y2-axis travel: +/-40 mm Machining area Maximum machining area: Ø 670 mm x 1,530 mm Control Control type: FANUC F31iB5 with CELOS Operation: CELOS - ERGOline Touch Spindle Main spindle: standard spindle Ø 91 mm, 4,000 rpm Counter spindle: Standard spindle Ø 91 mm, 4,000 rpm Chuck Main spindle chuck: Hollow chuck 10", Ø 254 mm Chuck for counter spindle: KITAGAWA 10" hollow chuck BB210A821 Protection: Double foot switch with protective cover for main and counter spindle Travel control: Automatic travel control of the clamping cylinder for the main spindle and counter spindle Turning-milling spindle Spindle (B-axis): Standard speed 12,000 rpm (FANUC) Tool holder: Capto C6 Positioning: B-axis with 0.0001° accuracy for 5-axis machining Tool turret Type: Turret 2 with tailstock function Equipment: 10-station turret for tool holders attached with screws Milling performance: 6,000 rpm, 40 Nm (turret 2, FANUC) Tool magazine Capacity: 76 tools Tool holder: CAPTO C6 Measuring and monitoring Tool presetting: Manual tool presetting device for main and counter spindle, removable (standard) Distance measuring system: Direct distance measuring system in the X, Y and Z axes of the turning-milling spindle Sensor system: Spindle sensor measuring system with radio signal transmission, Renishaw RMP600 Automation Signal lamp: 4-color (red, yellow, green, blue) Interface: For bar feed device (LNS, IRCO, IEMCA, Edge Technologies, multiple) MACHINE DETAILS Machine dimensions (L x W): 5,825 x 2,830 mm Cooling media and chip disposal Chip conveyor: Ejection on the right, hinged belt + Drum filter Coolant: Use of water-soluble cooling lubricants (emulsion) Pressure: High-pressure coolant system with 70 bar Coolant supply: Through the spindle for the tool spindle and lower turret Filter system: Knoll/Interlit Compressed air system Blow-off system: For chucks on the main and counter spindle Oil mist system Oil mist separator: Extraction opening Ø 200 mm, AFS 1600 Filter and cooling system Filter system: INTERLIT TMF300/980 compact filter system, 70 bar Additional pressure: 15 bar for turret II with lifting pump (FANUC/MITSUBISHI) Cooler: INTERLIT auxiliary cooler, 15 kW

Condition: reconditioned (used), Robotic welding system with a two-station positioner. For sale: a robotic welding system from Yaskawa Motoman, including an RM2-500 positioner. Robot: EA1400 NX100 and so on. We can assemble and commission the system. We also offer training and instruction. The system will be refurbished according to the customer's requirements. Lrsdpfxsgttyte Ac Ajn We are a YASKAWA system partner and offer you complete service for your Motoman robot and your systems.

Condition: new, pressure: 63bending length: 2500column width: 1980motor: 11slide stroke - max.: 150opening width: 400CNC Press break KK Industries 63x2500 4 Axis Y1-Y2-Y-X-R mit CNC Bombing Technical Parameters:Pressing Force: 63 t Bending Length: 2500 mm Distance Between Columns: 1980 mm Throat Depth: 300 mm Slider Stroke: 150 mm Maximum Opening: 400 mm Slider Down Speed: 180 mm/s Slider Return Speed: 170 mm/s Slider Working Speed: 14 mm/s Main Motor Power: 11 kW CNC System: ZY68 Number of Control Axes: 4+1 Oil Tank Capacity: 150 L Back Gauge:X-Axis:X-Axis Travel: 600 mm X-Axis Speed: 200 mm/s Positioning Accuracy: ±0.10 mm Repeat Positioning Accuracy: ±0.015 mm Motor Power: 0.85 kW R-Axis:R-Axis Travel: 150 mm Lsdpfsv Trgqjx Ac Aorn R-Axis Speed: 100 mm/s Positioning Accuracy: ±0.10 mm Repeat Positioning Accuracy: ±0.015 mm Dimensions and Weight:Length: 2750 mm Width: 1350 mm Height: 2320 mm Weight: 4000 kg Delem T53 Control System (additional cost 5,000¤)

Condition: new, pressure: 60bending length: 2550column width: 2100daylight: 550stroke lenght (max.): 270column throat depth: 450messurements (LxWxH): 3220 x 2250 x 2560weight approx.: 5200motor power: 5,5 Lredpfx Ajd I Annec Ajn

Condition: good (used), Year of construction: 2002, Make: PLEIGER Type: HF 75 / 115 S 30 Control: Siemens Simatic panel Year: 2002 Stroke speed slide step 1 : 4 - 20 M/Min Stroke speed slide step 2 :0,3 - 3 M/Min Rotation chuck step 1 : 300 Rpm and 320 Nm Rotation chuck step 2: 100 Rpm and 1290 Nm Horizontal deep hole honing machine Horizontal tube honing machine Horizontal cylinder honing machine Horizontal pipe honing machine Fine finishing of cylindrical bores Specifications Metric US Standard Drilling depth 11500 mm Power on spindle 55 kW Speeds / ranges 300 Rpm Dimensions (Estimate) Length 25000 mm Width 2000 mm Height 2000 mm Lredpfekvnc Ssx Ac Asn Weight 30000 kg Please Note: The information on this page has been obtained to the best of our ability and belief, and from the manufacturers where possible. It is given in good faith, but its accuracy can not be guaranteed. Accordingly, it will not form a representation or constitute contractual terms. We advise you to check any vital details!

Condition: ready for operation (used), GMN TSE 75cdu x 250/15000 high-speed spindle, serial number as shown in the photo, used, with normal signs of wear, 100% functional, scope of delivery as shown in the photos. Lredpfxji Eabco Ac Ajn

Condition: ready for operation (used), GMN TSE 80 x 250 - 6007 spindle SN: R307943 with Siemens 1LA5073-4AB95-Z motor SN: EJ797957201009, used, in good maintained condition, 100% functional, scope of delivery as per photos. Ljdpfey Npdwjx Ac Aern