Used Certuss Universal Tc 700 for sale (10,602)

Condition: used, Year of construction: 2018, functionality: fully functional, travel distance X-axis: 1,520 mm, travel distance Y-axis: 520 mm, travel distance Z-axis: 460 mm, rapid traverse X-axis: 32 m/min, rapid traverse Y-axis: 32 m/min, rapid traverse Z-axis: 32 m/min, controller manufacturer: SIEMENS, controller model: 840D, rotational speed (max.): 12,000 rpm, overall weight: 10,000 kg, spindle speed (max.): 12,000 rpm, spindle nose: ISO 40, number of slots in tool magazine: 32, Equipment: chip conveyor, documentation/manual, rotational speed infinitely variable, Year: 2018, CE compliant CNC: SIEMENS 840D with SHOP MILL 4+1 axes ONLY 18,300 power-on hours Worktable dimensions: 2-piece table - fixed 920x540 mm / rotary-tilting 650x500 mm (with extension ring) Longitudinal X-axis travel: 1520 mm Hfedpfxey Azcle Ai Deg Transversal Y-axis travel: 520 mm Vertical Z-axis travel: 420 mm Spindle taper type: ISO 40 Spindle speed: 12,000 rpm Automatic tool changer: 32 positions Spindle motor power: 15 kW Approximate net weight: 10,000 kg Accessories: Internal coolant Chip conveyor Full upper enclosure Pneumatic door opening BLUM tool presetting and workpiece probe capability

Condition: as good as new (ex-display), Year of construction: 2025, travel distance X-axis: 3,000 mm, travel distance Y-axis: 1,500 mm, travel distance Z-axis: 1,400 mm, rapid traverse X-axis: 30 m/min, rapid traverse Y-axis: 30 m/min, rapid traverse Z-axis: 30 m/min, workpiece weight (max.): 6,000 kg, rotational speed (max.): 10,000 rpm, tool length: 800 mm, New machine HDC3000 with 6 axes • Travel ranges: X=3000 mm, Y=1500 mm, Z=1400 mm • Heidenhain iTNC 640 with handwheel • NC rotary table for 5-sided machining 1250 mm x 1600 mm • 2-axis NC universal drilling and milling head, fully simultaneous and positioning operation • Spindle 10,000 rpm HSK100, S1=220 Nm spindle torque • Tool change system HSK100 / 60 stations – 800 mm tool length • Chip conveyor • Optimized for 5-sided machining including deep hole drilling • Coolant supply system Hjdpfjy Sl Ecex Ai Defg • Internal/external air blow-off device • ICS 60 bar for deep hole machining • Fully enclosed • Large interference circle 2300 mm • Including mounts • Including wash gun • Including warranty • Short delivery time, subject to prior sale

Condition: reconditioned (used), Year of construction: 2010, • Traveling distances X=3100 mm, Y=1950 mm, Z=1390 mm • Heidenhain iTNC 530 with handwheel HR 410 • Machine table for multi side working 3000 mm x 1600 mm • 2-axis NC-universal milling head, for simultaneous and positioning working • Spindel 10.000 U/min HSK 100, 130 Nm Spindle torque • Tool change system HSK 100 / 40 places for 750 mm long tools • Chip conveyor (screw type) in X-axis, for transport into • Chip conveyor scraper belt type (traverse conveyor), Fabr. Knoll • Coolant container 900 l, Fabr. Knoll • Outside air at spindle • IKZ 60 bar for deep hole drilling function • Covering with safety glass pane, open at the top for loading by Hjdpfx Aey Sl Dxei Djfg crane • 2 part sliding doors at the operator side • 2 part sliding doors at the front side, for easy loading • Radio-controlled measuring probe RMP 60 • incl. washing gun • incl. podiums at the front side and operator side • complete factory overhauled and painted new • short time delivery after arrangement • used machine • Y-axis ball screw in September 2021 incl. bearings renewed • X-axis new linear guiding system, July 2023 changed, renewed • Spindle overhauled at Mai 2023 (clamping system new, clamping cartridge new, rotation unit new, general tests) (at 23105 spindle hours)) • can be visited under power at 72793 Pfullingen • optional fixators • optional installation at customers plant • optional transport • 23122 spindle hours in total • 53991 machine hours in total • Year of construction 2010 Subject to prior sale

Condition: used, Workpiece height: max. approx. 10 cm Hodpfow Na Urex Ai Dsfg Workpiece length: approx. 90–200 cm Universally usable Sicko ASF stacking unit with high-lift truck for use as mechanization behind planing machines or similar processing machines. Special price ex location.

Condition: used, x-travel 300 mm y-travel 160 mm z-travel 330 mm table surface area 600 x 200 mm table load capacity 200 kg Spindle Speed 40-2.000 U/min. Hfjdpfx Ajy Sbkbsi Dog tool taper SK40 dimensions 1200 x 1160 x 1800 mm machine weight ab. 800 kg

Condition: used, Year of construction: 2018, x-travel 750 mm y-travel 660 mm z-travel 650 mm Control Siemens spindle tunring speed 12.000 U/min tool taper HSK 63 The machine was used for machining aluminum and, in our assessment, is in good used condition. It can be inspected under power by appointment. Technical features & accessories: - Twin spindle - 5-axis - Pallet changer Accessories, tools, and clamping devices shown are only included if explicitly stated in the additional information. Hfsdpsyrt A Iefx Ai Dog Technical data and specifications are subject to change without notice. Prior sale is reserved.

Condition: used, Year of construction: 2010, x-travel 500 mm y-travel 700 mm z-travel 500 mm A-axis 240 (-120/+120) ° C-Axis 360 ° control Siemens 840 D faceplate diameter 440 mm T-slot - width 14 mm T-slot - distance 75 mm max. table load 400 kg max. turning speeds 20.000 min/-1 tool taper HSK 63 A workpiece length 330 mm tool diameter 125 mm change-time chip to chip 4,5 sec Hfedpfx Asxq R E Noi Dog weight of the machine ca. 10,5 t dimensions of the machine ca. 2,5 x 5,2 x 3,5 m In our assessment, the machine is in good used condition and can be inspected under power by appointment. Accessories: - Kuka KR200-3 comp Robot Three identical machines are available. Accessories, as well as the tools and clamping devices shown in the images, are included in the scope of delivery only if explicitly noted in the additional information. Subject to changes, errors in technical data and specifications, and prior sale!

Condition: good (used), Year of construction: 2017, travel distance X-axis: 500 mm, travel distance Y-axis: 450 mm, travel distance Z-axis: 400 mm, 5-axis machining center DMG MORI CMX 50 U including robot Year of manufacture: 2017 Control unit: Siemens Operate Technical Data Travel paths: X-axis: 500 mm Y-axis: 450 mm Z-axis: 400 mm B-axis: -5 to +110° Hfsdpfsy Ry N Tsx Ai Deg C-axis: 360° Main spindle: Tool holder: SK 40 Spindle speed range: 20 - 12,000 rpm Drive power – main spindle (100/40% duty cycle): 13 / 9 kW Worktable: Table size: Ø 630 x 500 mm Tool changer: Number of tool stations: 30 positions Feeds: Rapid traverse (x/y/z): 30 m/min Operating hours: Spindle hours: Technical features & accessories: - Direct absolute measuring system in x, y, and z, including air purge - Blowing air switching via M-function - Production package, consisting of: • Internal coolant supply 12 bar • Chip conveyor, tank 250 L • Enclosure roof • Tool changer door can be opened • Signal lamp • Touch probe PP40 • Tool measurement TS27R • Tool breakage monitoring Robot ROBOJOB Type: Mill-Assist-E Year of manufacture: 2018 Spindle bearings replaced in autumn 2025.

Condition: new, functionality: fully functional, Year of construction: 2025, operating hours: 30 h, Equipment: centralized greasing system, dust extraction, emergency stop, fume extraction, safety light barrier, Tube Laser Cutting System Ideal for Entry-Level Applications. Simplicity meets efficiency with the Durma HD-TC COMPACT 60250 entry-level tube laser. Perfect for workshops, metal fabricators, and others looking to step into tube laser processing, this laser offers straightforward operation, reliable performance, and excellent value for money. Discover how the Durma HD-TC COMPACT 60250 can enhance your production with precise cuts and user-friendly technology, adding value to your operation. 3 kW Laser Power Maximum Sheet Thicknesses: - Mild Steel: 12 mm - Stainless Steel: 6 mm - Aluminium: 6 mm - Copper: 3 mm - Brass: 6 mm Capacity: - Maximum Tube Diameter: Ø250 mm - Maximum Square Profile Dimensions: 160x160 mm - Maximum Rectangular Profile Dimensions: 200x150 mm - Minimum Tube Diameter: 16 mm - Maximum Material Length: 6000 mm - Minimum Remnant Length: 65 mm - Unloading Length: 3000 mm - Semi-automatic unloading unit: optional (6m) - Maximum Material Weight: 58 kg/m - Maximum Total Workpiece Weight: 350 kg - Profile types that can be cut: Round, square, rectangular, elliptical - Open profile types that can be cut: I, C, L - Maximum open profile dimensions: 240x240 mm Dynamics: - X-Axis: 40 m/min - Y-Axis: 94 m/min - Z-Axis: 30 m/min - A-Axis: 510 °/s Accuracy: - Positioning Accuracy: ±0.2 mm - Positioning Variation: ±0.05 mm - Tube Center Detection with Capacitive Sensor: Yes Additional Available Configurable Options. LASER POWER: Hfjdpfx Asrkntcsi Dog - Upgrade to DURMA LASER SOURCE BRILASE 4 kW ADVANCED fiber laser source (incl. chiller) + Durma cutting head - Upgrade to DURMA LASER SOURCE BRILASE 6 kW ADVANCED fiber laser source (incl. chiller) + Durma cutting head OPTIONS: - Air filtration system (40 bar N₂ + 16 bar O₂ + 16 bar Air) - Air filtration system (40 bar N₂ + 16 bar O₂ + 40 bar Air) - CNC oscillating head (+/- 45°) - Semi-automatic front loading system - Unloading table (6m) with conveyor - Unloading table (3m) with conveyor - Additional dongle software - Transformer 220, 440, 575V SOFTWARE OPTIONS: - Durma Cloud License + D-Mobile + Smart Watch - STEP file importer

Condition: as good as new (ex-display), Year of construction: 2024, operating hours: 24 h, Make: DURMA Type: HD-TC 60170 Fiber Year of construction: 2024 Automatic loading unit 6000 mm Unloading system 4000 mm Laser power: 2000 Watt Hfedpfxjdx Nfws Ai Djg Control: Siemens Sinumerik 840D Operating hours: 24 h Max. pipe diameter: 170 mm Min. pipe diameter: 20 mm (12 optional) Max. Square profile dimensions: 120x120 mm Max. Dimensions of rectangular profiles: 150x100 mm Max. Profile length: 6500 mm Min. profile length: (for automatic feed) 3000 mm Max. Profile weight: 37.5 kg/m Max. Material thickness: (for 2 kW) 8 mm Min. material thickness: 0.8 mm Length of the last inserted part: 185 mm Positioning accuracy: +/- 0.20 mm Repeat accuracy: +/- 0.05 mm Max. Loading capacity: 3000 kg Profile types: round, square, rectangular, elliptical H,C,U,L *Installation area L/W/H: approx. 16000x7400x2350 mm * Weight: approx. 20000 kg * depending on equipment variant Standard equipment Sinumerik 840D control system Autofocusing PRECITEC Procutter cutting head F150 focus Manual unloading table Manual loading Laser diode for defining position points Central lubrication Chip conveyor External user interface for the output of analog values (power-speed-pressure) External CAD/CAM programming software Lantec with autonesting Work area lighting Warning light Various laser cutting options selectable Remote control: remote maintenance access via LAN connection or WLAN CE marking Extended equipment IPG fiber laser source 2000 Watt (incl. cooler) Automatic loading unit 6000 mm Unloading table 4000 mm Filter, compact dust extraction - Vanterm The machine can be viewed and demonstrated at any time by appointment at our demonstration center in Staufenberg. Further machines are available for demonstration in Staufenberg. We will be happy to send you further information on request.

Condition: as good as new (ex-display), Year of construction: 2024, Make: DURMA Type: HD-TC 60170 Fiber Year of construction: 2024 Automatic loading unit 6000 mm Unloading system 4000 mm Hfjdpfx Aied Tt Atj Deg Laser power: 2000 Watt Control: Siemens Sinumerik 840D Operating hours: 24 h Max. pipe diameter: 170 mm Min. pipe diameter: 20 mm (12 optional) Max. Square profile dimensions: 120x120 mm Max. Dimensions of rectangular profiles: 150x100 mm Max. Profile length: 6500 mm Min. profile length: (for automatic feed) 3000 mm Max. Profile weight: 37.5 kg/m Max. Material thickness: (for 2 kW) 8 mm Min. material thickness: 0.8 mm Length of the last inserted part: 185 mm Positioning accuracy: +/- 0.20 mm Repeat accuracy: +/- 0.05 mm Max. Loading capacity: 3000 kg Profile types: round, square, rectangular, elliptical H,C,U,L *Installation area L/W/H: approx. 16000x7400x2350 mm * Weight: approx. 20000 kg * depending on equipment variant Standard equipment Sinumerik 840D control system Autofocusing PRECITEC Procutter cutting head F150 focus Manual unloading table Manual loading Laser diode for defining position points Central lubrication Chip conveyor External user interface for the output of analog values (power-speed-pressure) External CAD/CAM programming software Lantec with autonesting Work area lighting Warning light Various laser cutting options selectable Remote control: remote maintenance access via LAN connection or WLAN CE marking Extended equipment IPG fiber laser source 2000 Watt (incl. cooler) Automatic loading unit 6000 mm Unloading table 4000 mm Filter, compact dust extraction - Vanterm The machine can be viewed and demonstrated at any time by appointment at our demonstration center in Staufenberg. Further machines are available for demonstration in Staufenberg. We will be happy to send you further information on request.

Condition: new, Year of construction: 2024, The Durma HD-TC 60220 pipe laser stands for maximum precision and efficiency in the processing of pipe materials. With its impressive maximum pipe diameter of Ø220 mm and the ability to cut both square profiles of 160 x 160 mm and rectangular profiles of 200 x 100 mm, this pipe laser offers exceptional flexibility for a wide range of applications. Hfedpfx Asq Tpkyji Deg Thanks to the advanced automatic loading system, which can handle tubes up to Ø170 mm in diameter, and the ability to process materials up to 6500 mm in length, the HD-TC 60220 is ideal for projects that require fast production with consistently high quality. The minimum material length for automatic loading is 3000 mm, which further increases the efficiency of the machine and reduces processing time. Max. Tube diameter: Ø220 mm Laser power: 3 kW Max. Dimensions of the square profile: 160 x 160 mm Max. Dimensions of the rectangular profile: 200 x 100 mm Min. pipe diameter: 20 mm (12 mm with manual loading) Max. Tube diameter for automatic loading: Ø170 mm Max. Profile dimensions for automatic loading: 150 x 100 mm, 120 x 120 mm Max. Material length: 6500 mm Min. material length for automatic loading: 3000 mm Length of the last piece: 4000 / 6000 mm Unloading length: 150 mm Max. Material weight per meter: 52 kg/m Max. Material weight (total length): 340 kg Max. Loaded weight: 3000 kg Profile types: Round, Square, Rectangular, Elliptical Types of open profiles: L, U

Condition: good (used), Year of construction: 1999, operating hours: 52,324 h, functionality: fully functional, X working area max.: 1270 mm Y working area max.: 1270 mm Control: Bosch Type 3 Basic Standard equipment: - Robust C-frame - Safety light barriers - Coordinate guide with integrated linear magazine - 2 clamping claws - Automatic tool changer - Automatic repositioning - Tool length compensation - Forming capability - Mono tool holder with 360° rotation for all tools - Programmable hold-down device - Multitool drive - Punch slug extraction - Brush tables - Part chute 200 x 200 mm, sorting of parts into 2 containers - NC-controlled, digital, maintenance-free three-phase drives - Network interface RJ34 - 3.5" floppy disk drive - TOPS 2000 graphical programming - Online diagnostics via modem - Operating manual Hjdpfxsy Sat Uj Ai Dsfg + Vibration-damped installation + Multitool + Thread forming + Start post

Condition: reconditioned (used), Year of construction: 1984, Universal tool milling machine Make: DECKEL Model: FP 1 Active Year of manufacture: 1984 - overhauled, repainted, RAL7035 light gray / RAL7012 basalt gray RAL5008 gray-blue Mach. no.: 2101-1067 Milling head type: 2171 Milling head number: 1086 with guarantee geometric acceptance with test report Accessories: - 3-axis active digital display HEIDENHAIN TNC 113 with active function in X and Z axis - Fixed table 600 x 200 (T-slot: 12 mm) - Vertical milling head SK 40 with tightening thread S 20 x 2 - Coolant system Hsdochfyfopfx Ai Dsfg - Operating instructions - used as seen -

Condition: new, Universal milling machine Hfedpfxsg Anfne Ai Deg Make: OPTimill Model: MT 60 Item no.: 3336090 Condition: New machine Travels: - X-axis 750 mm - Y-axis 230 mm - Z-axis 360 mm equipped as standard with - 3-A digital readout DPA 31 PLUS - Automatic feed in X-axis - B 18 drill chuck holder - Gear rim drill chuck 3-16 mm / B 18 - Reducing sleeve MK 2 with drive-out slot - Reducing sleeve MK 3 with drive-out slot - T-nuts - Coolant device - LED lamp - Operating tool - Operating instructions

Condition: used, Universal tool milling machine Brand: OPTIMUM Model: MT 100 Year of manufacture: 2018 – workshop tested Machine no.: J33021808035 Geometric acceptance with test report Accessories: - 3-axis digital display DPA 2000 - Vertical milling head SK 40 with drawbar thread M 16 - Fixed table 1,120 x 260 mm (T-slot: 14 mm) - Machine lamp Hjdpow Rlvqsfx Ai Dofg - Coolant system - Manual central lubrication - Operating manual Used as seen, without warranty The machine technically corresponds to the state of the art at the time of manufacture.

Condition: new, Universal milling machine Make: OPTimill Model: MT 50 Item no.: 3336005 Condition: New machine Travels: - X-axis 580 mm - Y-axis 200 mm Hfodpfxjbnfxue Ai Djg - Z-axis 340 mm serially equipped with: - 3-A digital readout DPA 31 PLUS - Automatic feed in X-axis - Long milling arbor 16 mm - Mandrel long 22 mm - Drill chuck holder B 18 - Gear rim drill chuck 3-16 mm/B 18 - Reducing chuck MK 2 with drive-out slot - Reducing sleeve MK 3 with drive-out slot - Machine light - Coolant device - Operating tool - Operating instructions

Condition: reconditioned (used), Year of construction: 1988, Universal tool milling machine Make: DECKEL Model: FP 3 L Active Year of manufacture: unknown - overhauled, repainted, RAL7035 light gray / RAL7012 basalt gray RAL5008 gray-blue Mach. no.: 2302-2319 Milling head type: 2271 Milling head number: 700-0883 with guarantee geometric acceptance with test report Accessories: - 3-axis active digital display HEIDENHAIN TNC 111 - Universal table 1000 x 520 mm (T-slot: 16 mm) - Vertical milling head SK 40 with Tightening thread S 20 x 2 Hfedpfeh Rv U Ejx Ai Djg - Central lubrication, electric - Coolant system - Operating instructions - Drill grinding device with diamond disk -used, as seen-

Condition: ready for operation (used), Year of construction: 2001, functionality: fully functional, machine/vehicle number: 15025703124, Used 5-axis machining centre with double table Manufacturer: DECKEL MAHO Model: DMU 70VL Hodpeyk S Hpefx Ai Defg Year of manufacture: 2001

Condition: like new (used), Year of construction: 2016, power: 200 kW (271.92 HP), overall weight: 7,500 kg, MEBOR multilame saw, year of manufacture 2016. In very good working condition! Almost like new. Hodpfxoy Sganj Ai Djfg

Condition: excellent (used), Year of construction: 2008, functionality: fully functional, nominal power (apparent): 9 kVA, overall weight: 1,800 kg, number of spindles: 4, number of slots in tool magazine: 21, input voltage: 380 V, CNC BROTHER model TC-S2A 1 unit manufactured in 1999 Hfsdpfx Aioyh N Rwo Djg 1 unit manufactured in 2008 3 axes Simple table Without hydraulic station Without vapor recovery system

Condition: used, Year of construction: 2015, machine/vehicle number: 121951124, Empty weight: 9.360 kg Lifting capacity: 700 kg Working height: 1.960 cm Hfsdpfexwi Ivsx Ai Djg Front tyres / undercarriage remaining: 60 Rear tyres remaining : 60 Tyre brand: - Transport dimensions (LxWxH): 4.51x1.22x3.34 Please contact PFEIFER GROUP for more information

Condition: excellent (used), Year of construction: 1998, Frame dowel and slot mortising machine from Hofmann HT 200 U with angle adjustment Specialized drilling machine for stair construction, window manufacturing, and universal applications thanks to pneumatic height adjustment. Angled doweling and baluster/rail drilling are easily possible due to the swiveling drilling unit. Motor with pole-change switch, two speeds Hfjdpeyfta Tefx Ai Dsg Motor output 1.5 / 1.8 kW, 1400 / 2800 rpm Motor can be started via a practical handle switch Precision drill chuck with two inserts: 16 mm and M10 thread Table size approx. 1100 x 240 mm Linear laser for precise workpiece positioning Drilling unit can be rotated 65 degrees to the left and right Pneumatic adjustment of working height, allows doweling on two levels without repositioning Desired drilling heights for each drilling level can be set with a handwheel and digital counter; switching between levels is pneumatic and is operated from the front Cross adjustment approx. 320 mm, stepless or in a 12 mm grid Drilling stroke approx. 200 mm 2 pneumatic workpiece clamps, positionable at the front and back of the table 2 swiveling workpiece supports 2 side stops, can also be used as front support Mobile base Extraction port 80 mm 4 used but good drills: 9, 12, 16, 19 mm Few touch-ups on the paint, excellent condition, see original photos A used swiveling slot mortising machine in this condition is very rarely available. CE mark Operating manual Dimensions: approx. 1200 x 1200 x 1200 mm (LxWxH), weight 310 kg. The machine can be demonstrated at our premises by appointment. We only offer machines that are ready for demonstration and available in our warehouse – see “more offers from this supplier.”

Condition: excellent (used), Year of construction: 2006, functionality: fully functional, Deckel Maho DMU 50 evo Linear with Heidenhain TNC 530 Control – TOP Condition Technical Data: >> Year of manufacture: 2006 >> Control: Heidenhain iTNC 530 >> Travel (X/Y/Z): 500 / 450 / 400 mm >> C-axis: 360 degrees >> B-axis: 0 to 161.955 degrees >> Tool holder: HSK A63 >> Max. spindle speed: up to 18,000 rpm >> Feed rate steplessly programmable in X, Y, Z: up to 20,000 mm/min C and B axes steplessly programmable up to rapid traverse speed >> Rapid traverse Y/Z axes: 50 m/min X-axis: 80 m/min (linear drive) B-axis: 40 rpm C-axis: 50 rpm >> Tool magazine: double gripper, 60 tool positions >> Clamping surface: Ø 500 x 380 mm Distance between T-slots: 63 / 14H7 >> Table load: 200 kg >> Dimensions and weight (approx.): Machine without control panel and accessories Depth: 3.0 m, Width: 2.4 m, Height: 2.6 m Weight: approx. 7,000 kg >> Operating voltage: 400 V >> Electronic handwheel: Heidenhain HR 410 >> Power connection: 17 kVA >> Chip conveyor >> Active spindle cooling >> Mist extraction unit >> High-pressure coolant supply (IKZ) 40 bar >> Coolant purification system (fleece filter system) >> Rinse gun >> Visiport >> Measuring system with air purge >> Prepared for robot loading >> 3D probe Heidenhain TS640 >> 3D Quick Set >> Kinematics Hfsdpfxoy R Dgpo Ai Dsg >> Blum laser for tool measurement and breakage control >> Complete documentation The following works have been carried out: >> Main spindle completely overhauled >> Complete maintenance: all cooling and pneumatic hoses replaced, new filters, fluids and belts replaced. Scrapers etc. fully cleaned. >> Geometrically measured (acceptance protocol available) About the machine: For sale is a Deckel Maho DMU 50 evo Linear machining center with Heidenhain TNC 530 3D path control. The machine is in excellent condition. The main spindle has been overhauled (exchange spindle), fully serviced, and an acceptance protocol is available. Invoices for the overhaul totaling €42,000 (net) are available. You are welcome to view and test the machine under power at our premises.

Condition: used, Year of construction: 2002, functionality: fully functional, grinding width: 1,100 mm, overall weight: 6,600 kg, type of input current: three-phase, The machine is in working condition. 2+2 level grinding is possible. Hjdjyybgrepfx Ai Dofg