Used Cnc Turning Centre for sale (16,168)

Condition: like new (used), Year of construction: 2018, Swing over bed 641mm, 229mm max. machining diameter, Hodpoy U Hpbsfx Ac Aon 356mm cutting length, 6000rpm spindle, 44mm bar capacity, 12 station turret, 11.2kW spindle motor, +/-50mm Y axis, C axis & Milling, HAAS control, 3 jaw chuck, coolant, Tool Setter,

Condition: used, Year of construction: 2005, Technical details: turning diameter: 275 mm Hjdpfx Aewp D Nbjc Aen turning length: 900 mm spindle passage: 65 mm power capacity at 100 % load: 25/20 kW spindle turning speed range: 1 - 5000 U/min spindle diameter in front bearing: 110 mm c-axis: 1 - 500 U/min. number of workpiece supports: 4 tool turret: 1 x-axis: 290 mm y-axis: 165 mm z-axis: 360 mm b-axis: 360 ° rapid speed: 18/30 m/min number of tools: 2x2 + 2x2 number of driven tools: 2x2 + 2x2 mm toolpiece turning speed range: 8000 / 2000 U/min power capacity: 25% ED 5,8 kW tool taper: TRAUB 60 tool turret: 2/3/4 x-axis: 170 mm z-axis: 600/950 mm y-axis: +/- 60 mm rapid speed: 18/15/30 m/min number of driven tools: 10 mm toolpiece turning speed range: 1 - 6000 U/min power capacity: 25% ED 5,8 kW tool taper: DIN 69880 40 x 63 total power requirement: 95 kW weight of the machine ca.: 16 t dimensions of the machine ca.: 10,0 x 3,5 x 3,0 m with CNC TRAUB TX 8i, Barloader TRAUB Stamag DNH61 / 3000, Main and Sub spindle with C-axis 1 support with B-axis 3 turret supports dust exhauster, coolant attachment with coalescence-seperator and chip conveyor 2 pc. 3-jaw chuck SMW KNCS-N 170-43 2 pc. HAINBUCH Spanntop chuck 40 pc. various tool holder non-driven 6 pc various tool holder driven Spare parts package *

Condition: used, Year of construction: 1990, Technical details: turning diameter: 445 mm turning length: 2000 mm turning diameter over bed slide: 660 spindle bore: 65 mm spindle speeds:: 16 - 3150 U/min. rapid motion - x-axis: 10 mm/min rapid traverse Z-axis: 15 m/min total power requirement: 34 kW weight of the machine ca.: 7,5 t dimensions of the machine ca.: 6 x 2,5 x 2,2 m Hodow I R Ndepfx Ac Asn with CNC Control TX 8 D C-axis driven tooling 14 station turret head 3 jaw chuck dia. 315 mm tailstock, steady as NC-axis diverse driven toolholders diverse turning toolholders chip conveyor and coolant attachment *

Condition: good (used), Year of construction: 2006, functionality: fully functional, Technical details turning diameter 660/275 mm turning length 1498 mm control Fanuc/Mori Seiki MSX 701 total power requirement 90 kVA weight of the machine ca. 26,6 t dimensions of the machine ca. 5301 x 2997 x 2788 mm Additional information 9-axis CNC turning and milling centre * Fanuc MSX-701 CNC control * Milling spindle at top (B axis), as full 4th axis, positioning 0.0001 deg. * 40-position tool magazine * 10-position turret at bottom, all positions driven * 2 x 3-jaw quick-change chuck KNCS-N 315/91 * KNOLL high-pressure coolant system, pressure setting 12/25/35/45/55/62 and 72 bar, with maintenance-free rotary filter system * Chip conveyor * Drain system for main spindle chuck (controlled via M function) * Drain system for tool cutting edge (controlled via M function) * Coolant gun incl. accessories * Oil mist extraction * Direct measuring system X1, X2, Y-axis * Bar loader interface * Double foot switch for both spindles * Islands and pocket programming for MAPPS * High-speed fixed cycle for MAPPS * Programm memory extension to 8 MB * Programm restart * 3-stage signal lamp * 512 MB memory card (CF card) Swing diameter over cross slide (tool spindle 1): 750 mm Swing diameter over cross slide (turret 2): 400 mm Max. turning diameter (tool spindle 1): 660 mm Max. turning diameter (turret 2): 275 mm Max. machined workpiece length: 1498 mm Max. bar material: 90 mm Travels: Hodozabltepfx Ac Asn X1 axis (tool spindle): 750 mm Y axis (tool spindle): 420 (+/- 210) mm Z1 axis (tool spindle): 1635 + 100 mm for tool change B axis (tool spindle): +/- 120 deg., full B-axis 1 deg. indexed and 0.0001 deg. braked X2 axis (turret): 195 mm Z2 axis (turret): 1525 mm SZ axis (subspindle): 1610 mm Rapid traverse: (X1,Z1) 50 m/min. / (Y,X2,Z2,SZ) 30 m/min. Main and subspindle: Spindle speeds infinitely variable (spindle 1 + 2): 30-3000 rpm. C axis (spindle 1 + 2): 0.001 deg. Main spindle motor: 22/18.5 kW Subspindle motor: 22/18.5 kW Torque (spindle 1 + 2): 1000 Nm Disc turret: Number of tool positions: 10 Speed of driven tools: 6000 rpm. Drive power: 5.5/3.7 kW Milling spindle head: Tool holder: HSK A63 Max. speed: 12,000 rpm Drive power: 18.5/11 kW Torque: 120/44 Nm Tool changer: 40-stations Tool diameter 70/140 mm Tool length 400 mm Tool weight 8/10 kg Total power requirement 90 kVA Main dimensions Length x width x height 5301 x 2997 x 2788 mm Machine weight 26.6 t Accessories: Measuring arm (picture) tool measurement in machine Tool holder + box, reduction sleeves, driven tools Clamping jaws package Collets package

Condition: used, machine/vehicle number: 007841, X axis working area: 4200 mm Y axis working area: 1200 mm Working Table: Pod and Rail Main Electrospindle power: 18 KW Number of controlled axes: 4 axes Hodpfoyg Ef Dsx Ac Ajn Maximum edge height: 64 mm Total number of tool changer positions: 18

Condition: used, Year of construction: 2012, turning diameter 350 mm turning length 650 mm control 840 D SL ShopTurn Siemens greates pass round over bed 385 mm Swing dia. over traverse guideway 350 mm turning speed range - main spindle 0 - 4.500 min/-1 power capacity - main spindel 11,5 / 8 kW max. Torque 340 Nm spindle diameter in front bearing 130 mm spindle bore 87 mm bar material dia. max. 65 mm max. chucking diameter 250 mm spindle head 170 h5 number of toolpositions 12 pos. Shank diameter DIN 69880: 30 mm Number of driven toolspositions 6 pos. Spindle speed - driven tool stations max. 4.500 min -1 power capacity driven tool-stations 5,5 kW x-axis 255 mm z-axis 800 mm tailstock 680 mm taper of center MK 4 clamping capacity 6,8 kN feed speeds 0 - 30.000 mm/min rapid traverse ( X / Y / Z ) 30 / - / 30 m/min Feed force ( X / Y / Z ) 4,5 / - / 6,2 kN total power requirement 28 kW weight of the machine ca. 3,3 t dimensions of the machine ca. 5,0 x 2,5 x 2,3 m CNC Universal Lathe GILDEMEISTER - NEF 400 V3 - C-Axis Hsdoy E Tvvspfx Ac Ajn - Tool-Drive - only ca. 8093h Spindle hours - incl. 1x workbench - incl. 1x tool cabinet - incl. 1x cabinet for VDI tool holders - incl. 8x tool holders - incl. 4x driven tools (2 radial, 2 axial)

Condition: used, Year of construction: 2008, functionality: fully functional, Turning / milling center with counter spindle with 10 CNC axes (X1, X2, Z1, Z2, Y1, Y2, B1, B2, C1, C2) Control: FANUC 31:iA Main Spindle Power: 15/11 kW bar material dia.: 51 mm spindle revolution: 5.000 min-1 Hjdpfx Acszacc To Aon Counter Spindle Power: 11/7,5 kW bar material dia.: 51 mm spindle revolution: 5.000 min-1 Turning and milling spindle Power: 7,5/3,7 kW Turning and milling spindle speed: 12.000 min-1 max. rotation length turret bottom: 1.005 mm Slide cross X1 / X2 / Z1 / Z2 / B2: 455 / 222,5 /1.090 / 1.005 / 1.008 mm Slide cross Y1 / Y2: +/- 70 / +20, -50 mm Swivel range B1 axis: +/- 95 ° Linear rack magazine incl. support robot CNC support steady rest Coolant cyclone filter system incl. 2 pcs. coolant pumping spindle oil cooler

Condition: ready for operation (used), Year of construction: 2013, functionality: fully functional, turning length: 532 mm, turning diameter over cross slide: 500 mm, turning diameter: 325 mm, spindle speed (max.): 3,500 rpm, spindle bore: 65 mm, travel distance X-axis: 195 mm, travel distance Z-axis: 430 mm, rapid traverse X-axis: 30 m/min, rapid traverse Z-axis: 30 m/min, rotational speed (max.): 5,000 rpm, total length: 2,875 mm, chuck outer diameter: 260 mm, total width: 1,675 mm, spindle nose: A2-8, overall weight: 4,650 kg, Equipment: documentation/manual, rotational speed infinitely variable, We have acquired this HWACHEON HI-TECH 200BL MC directly from production in working condition—see the video of the machine operating prior to dismantling. The machine is very comprehensively equipped and comes standard with: - C-axis + driven turret (both positions). - Renishaw probe. - Chip conveyor + collection bin. - Röhm 3-jaw chuck (DURO-NC 260/3) including 2 sets of top jaws. - 13 EWS toolholders, 4 of which are driven. - Various clamping sleeves and collets. - Original HWACHEON and FANUC documentation. The machine can be inspected under power in our showroom! Hedpfx Aceypc H Rj Ajn

Condition: reconditioned (used), Year of construction: 2019, functionality: fully functional, travel distance X-axis: 3,000 mm, travel distance Y-axis: 800 mm, travel distance Z-axis: 720 mm, rapid traverse X-axis: 50 m/min, rapid traverse Y-axis: 50 m/min, rapid traverse Z-axis: 50 m/min, controller model: MAZATROL Smooth, workpiece weight (max.): 2,500 kg, total height: 3,419 mm, total length: 5,250 mm, total width: 4,300 mm, table width: 820 mm, table length: 3,500 mm, overall weight: 16,800 kg, spindle speed (max.): 18,000 rpm, spindle motor power: 35,000 W, number of slots in tool magazine: 48, tool length: 350 mm, tool diameter: 130 mm, tool weight: 8,000 g, input voltage: 400 V, type of input current: three-phase, Equipment: chip conveyor, CNC Machining centre MAZAK VTC 800 30SR TECHNICAL CHARACTERISTICS: Year of manufacturing: 2019 CNC control: MAZATROL Smooth Hedpfx Acoy U Udye Aen Number of simultaneous axes: 5 Stroke X axis: 3000 [mm] Stroke Y axis: 800 [mm] Stroke Z axis: 720 [mm] Feed rate on X, Y and Z axes: 50000 [mm/min] Traversing feeds X, Y and Z axes: 50000 [mm/min] Min. distance spindle nose / table: 140 [mm] Max. distance spindle nose / table: 860 [mm] Table length: 3500 [mm] Table width: 820 [mm] Max. load on table: 2500 [Kg] B axis swivelling stroke: +110 [°] / -110 [°] [°] Table surface: Ø 500 [mm] Stroke C axis: table revolution 360 [°] Spindle type: CAT No.40 Max. spindle speed: 18000 [rpm] Spindle power: 35 [kW] Tool changer magazin number of stations: 48 Max. tool lenght: 350 [mm] Max. weight of single tool: 8 [Kg] Max. tool diameter: 80 - 130 [mm] Machine dimensions: 5250 x 4300 x 3419 [mm] Weight: 16800 [Kg] INCLUDED EQUIPMENT: x1 MAZAK type DS50C-R1-Z5th-axis NC rotary table Ø500 [mm] – 360,000 positions x1 electronic handwheel x1 spindle chiller x1 high-pressure coolant pump 15 [bar] x1 chip conveyor More information upon request.

Condition: good (used), Year of construction: 2013, operating hours: 23,758 h, functionality: fully functional, machine/vehicle number: AZ 0170, Very well-maintained and in good condition: CNC lathe SPINNER TC 300-52 SMCY ● Delivery terms: Ex works, loaded onto a truck ● Location: 57562 Herdorf ● Availability: Immediately, by arrangement. The exact collection date will be agreed upon and finalized. Our dismantling team will carry out the loading on site on that day. Please note that the date cannot be changed after it has been set. ● Payment terms: Advance payment - by bank transfer ● Internal No.: TM1 Hedpfxsy E Rx Is Ac Aen ● Can be inspected while powered on: Yes Technical data: Working area: Max. swing diameter: approx. 300 mm Max. turning length: approx. 250 / 200 mm Max. turning diameter: approx. 400 mm Travel ranges: Travel range X/Z: 180 / -400 mm Travel range Y: +40 / -40 mm Max. rapid traverse rate X/Z: 15 / 24 m/min TURRET 1: Max. speed: 5000 rpm Chuck size: 210 mm Spindle bore: 52 mm Spindle power: 15 / 19 kW (Siemens + Fanuc) Torque: 96 / 121 Nm (Siemens + Fanuc) TURRET 2: Max. speed: 7000 rpm Chuck size: 130 mm Spindle power: 6 / 8 kW Torque: 38 / 60 Nm TURRET: Number of tools: 12 Tool holder: VDI 25 Rotating tools: 12 Max. speed: 6000 rpm Power: 3 / 4.6 kW (Siemens) 1 / 1.50 kW (Fanuc) Torque: 9.75 / 14.75 Nm (Siemens) 7 / 31.8 Nm (Fanuc) Scope of delivery: ● Existing manuals/documentation ● Collet chuck (2 pieces, for main and counter spindle) ● Various collets and tool holders, consisting of: Collets type 364 E W25 80-5 from Ø 3–22 mm (in 0.5 mm increments) 2 × combination holders (internal and external cooling), type EWS 17.2525TDX 105 3 × collet holder EWS 31.2525 DTDX105 2 × Garant double holder, axial Attention: ● The tool holders visible on the machine in the turret are not included in the scope of delivery! Dimensions & Weights: ● Footprint L x W x H approx.: 2000 × 1600 × 2000 mm ● Weight approx.: 3500 kg Note: At the end you will find some pictures of the bar feeder. This is not included in the scope of delivery and can be purchased separately upon request and by arrangement. Additional information: ►If desired, we can offer transport to the destination ►The quoted price is net plus VAT ►The goods are sold excluding any warranty ►Technical data without guarantee ►Subject to prior sale ❗The sale of the goods is exclusively to business customers❗

Condition: used, Year of construction: 1995, Machine in parts for sale spare parts ..... CNC lathe, make GILDEMEISTER Type: CTX 600, year 1995 Hodsnximuopfx Ac Asn Forkardt chuck 315 mm, tool turret Tailstock, steady rest Headstock Guide covers and sheets Motors Machine in individual parts for sale ..... Please ask what you need and we will send you an offer.

Condition: good (used), Year of construction: 1996, CNC turning center TRAUB Type:TNC65 DG Year 1996 Control TRAUB TX8F Hsdpfxju Eug Io Ac Aen With lots of accessories.

Condition: used, Year of construction: 2004, functionality: fully functional, turning length: 1,200 mm, Equipment: documentation/manual, Mazak Quick Turn Nexus 350M CNC turning center with Mazatrol 640T Nexus CNC control Year of manufacture: 2004.11 Turning length: 1,200 mm Max. swing diameter: 750 mm Standard machining diameter: 336 mm Max. machining diameter: 420 mm Bar capacity: 102 mm Maximum spindle speed: 4,000 rpm 12-position tool turret Kitagawa 12-inch hydraulic 3-jaw chuck Tailstock Machine weight: 7,500 kg Includes various turret-mounted tool holders, 4 driven tool holders, and additional accessories. Accessories: 4 driven tools Hedpfx Asx Dccyec Aen Mazak tool holders Chip conveyor

Condition: excellent (used), Year of construction: 2006, functionality: fully functional, For sale is a high-quality CNC turning and milling center, a Spinner TC77-SMCY with Siemens Sinumerik control. The machine is equipped with: Y-axis C-axis Counter spindle Powered tools Chip conveyor Extensive tool package Technical data: Bar diameter 77 mm 12-position VDI50 turret Main spindle ASA 8 Counter spindle ASA 6 Speed up to 4000 rpm Turning diameter approx. 500–690 mm Turning length approx. 800–900 mm Y-axis ±60 mm Hodpjy Uwmwjfx Ac Ajn Main and counter spindle Weight approx. 6000–7000 kg

Condition: used, Year of construction: 2014, machine/vehicle number: S6F143651, FANUC 31iB control system, power 29 kW, main and counter spindle, spindle speed max. 5,000/7,000 rpm, travel distances X/Z = 260/610 mm, 12-position tool changer with powered tools (VDI 40), max. turning diameter/turning length = 320/550 mm, part ejector, operating hours approx. 400 hours. Hsdey U R Nxjpfx Ac Aon

Condition: used, Year of construction: 2018, machine/vehicle number: S4E184751, FANUC 18i-TF control system, twin-spindle, travel ranges X/Y/Z = 160/+40/-30/510 mm, 12-position tool turret with driven tools VDI 25, maximum speed 6,000 rpm, chip conveyor, remote control, front-end bar feeder TOP etl 8-50, year of manufacture 2018, serial number 95692, L = 5,000 mm, RITTAL control cabinet, remote control. Hedpfxey U R N Ee Ac Aen

Condition: used, Year of construction: 2016, machine/vehicle number: S4E163551, Control system: FANUC Oi-TD, remote control, single spindle, maximum speed 6,300 rpm, power 13 kW, 12-position tool changer with powered tools (VDI 25), chip conveyor, maximum turning length/diameter = 670/220 mm, maximum bore diameter 45 mm, control cabinet: RITTAL, stated B/h = 16,500. Hjdpfoy U R Riox Ac Ajn

Condition: used, Year of construction: 2011, machine/vehicle number: S4BZ4751, FANUC 18i-TB control, twin spindle, travel ranges X/Y/Z = 160/+40/-30/510 mm, 12-position tool turret with driven tools VDI 25, maximum speed 6,000 rpm, chip conveyor, remote control, front-end bar feeder TOP etl 8-50, year of manufacture 2011, serial number 92230, L = 5,000 mm, control cabinet RITTAL, remote control. Hedpey U R Rpjfx Ac Aon

Condition: used, Year of construction: 2010, machine/vehicle number: R2EY2851, Control system: GE-FANUC Oi-TC, remote control, single spindle, maximum spindle speed 6,300 rpm, power 13 kW, 12-position tool changer with powered tools (VDI 25), chip conveyor, maximum turning length/diameter = 670/220 mm, maximum bore diameter 45 mm, control cabinet RITTAL, stated B/h = 23,500. Hjdey U R R Aspfx Ac Ajn

Condition: used, Year of construction: 2021, machine/vehicle number: S4E213351, Control system: FANUC Oi-TF, remote control, single spindle, maximum speed 6,300 rpm, power 13 kW, 12-position tool changer with driven tools (VDI 25), chip conveyor, maximum turning length/diameter = 670/220 mm, maximum bore diameter 45 mm, control cabinet by RITTAL, stated B/h = 6,500. Hsdjy U R N Sepfx Ac Aen

Condition: reconditioned (used), Year of construction: 2016, operating hours: 9,701 h, functionality: fully functional, travel distance X-axis: 450 mm, travel distance Y-axis: 200 mm, travel distance Z-axis: 425 mm, rapid traverse X-axis: 40 m/min, rapid traverse Y-axis: 40 m/min, rapid traverse Z-axis: 40 m/min, nominal power (apparent): 35 kVA, controller manufacturer: FANUC, controller model: series 31i-B5, overall weight: 3,300 kg, spindle speed (max.): 42,000 rpm, spindle nose: A2-4", number of spindles: 2, number of slots in tool magazine: 72, tool length: 150 mm, tool diameter: 80 mm, input voltage: 400 V, type of input current: three-phase, Equipment: documentation/manual, CNC machining centre WILLEMIN MACODEL W508MT TECHNICAL CHARACTERISTICS: Year of manufacturing: 2016 Hjdpey Uwp Ejfx Ac Asn CNC control: FANUC series 31i-B5 Number of simultaneous axes: 5 Stroke X axis: 450 [mm] Stroke Y axis: 200 [mm] Stroke Z axis: 425 [mm] Traversing feeds X, Y and Z axes: 40000 [mm/min] Axes acceleration: 10 [m/s²] Max. bar diameter in turning spindle: 42 [mm] Main spindle max. speed: 6000 [rpm] Main spindle max. power: 7.5 [kW] Angular A axis stroke: 360 [°] Resolution A axis: 0.001 [°] Drive A axis: Torque-motor Spindle taper A axis: A2-4" B axis swivelling stroke: -15 [°] / +100 [°] Resolution B axis: 0.001 [°] Drive B axis: Torque-motor Spindle type: HSK-E40 Max. spindle speed: 42000 [rpm] Tool changer magazin number of stations: 72 Max. tool lenght: 150 [mm] Max. tool diameter: 80 [mm] Tool change time: 1 [sec] Chip to chip time: 3 [sec] Lubrication tank capacity: 150 [l] Collant pump flow rate: 60 [l/min] Rated current: 50 [A] Total power required: 35 [kVA] Supply voltage: 400 [V] Working hours: 9701 [h] Machine weight: 3300 [Kg] INCLUDED EQUIPMENT: x1 Back working unit with integrated 3-position turret on linear slide x1 Vise on back working unit x1 Counter-spindle on back working unit x1 42,000 rpm spindle with air/oil lubrication x1 RENISHAW OMP40-2 part probe x1 BLUM LaserControl NT laser measuring system for tool setting and tool monitoring x1 DETECTOR FRANCE type 202 tool breakage detection device x1 A2-4" collet chuck Set of 58 HSK-E40 tool holders x1 Self-tightening drill chuck LNS Super Hydrobar bar feeder, type 6.42 HS 3.2 Various equipment for LNS Super Hydrobar bar feeder Set of technical manuals x1 parameter backup system Machine visible under power in our premises by appointment. Price on request, loading on truck included. Possibility of shipping Worldwide. The information on this page has been obtained by the best of our ability. Therefore, its accuracy can not be guaranteed. Machines similar to Mikron, Hermle, DMG Mori, Mazak, Hedelius, AXA, Chiron, Matec, Reiden, Lagun, Haas, and Alzmetall, including CNC milling, drilling, and tapping machines, as well as CNC grinding machines.

Condition: used, machine/vehicle number: 007734, X axis working area: 3050 mm Y axis working area: 850 mm Main Electrospindle power: 5 KW Hsdpfx Acew Idb He Aen Total number of drilling spindles: 19

Condition: used, machine/vehicle number: 007289, X axis working area: 3200 mm Y axis working area: 900 mm Main Electrospindle power: 4.5 KW Hedpfewukyqox Ac Ajn Number of controlled axes: 3 axes Total number of drilling spindles: 16

Condition: used, Year of construction: 2020, operating hours: 17,031 h, machine/vehicle number: 00830004341, Catalog No.: 2.2, as a twin-spindle machine, SIEMENS 840D sl Operate control system, max. speed of turning and milling spindle: 10,000 rpm, max. drive power: 20 kW, max. torque: 120 Nm (100% ED), largest turning diameter: 360 mm, largest turning length: 1,200 mm, bar capacity: 102 mm, Capto C6 tool changer, tool magazine chain with 80 magazine positions, Y-axis travel: +/- 120 mm for eccentric machining, swivel range of the B-axis: +/- 110°, special equipment: hydraulic self-centering steady rest (25-199 mm), counter-spindle with tailstock function, fine chip removal system for cast iron machining, groove milling function, connection to central oil mist extraction system, external programming option via Mastercam, chip conveyor, subject to prior sale. Hsdpfx Acoy T Nw Ee Asn

Condition: used, Year of construction: 2020, operating hours: 13,641 h, machine/vehicle number: 00820028701, Catalog No.: 2.3, as a twin-spindle machine, with SIEMENS 840D sl Operate control system, max. speed of turning and milling spindle: 10,000 rpm, max. drive power: 20 kW, max. torque: 120 Nm (100% duty cycle), largest turning diameter: 360 mm, largest turning length: 800 mm, bar passage: 102 mm, Capto C6 tool changer, tool magazine chain with 80 magazine slots, Y-axis travel: +/- 100 mm for eccentric machining, swivel range of the B-axis: +/- 110°, special equipment: counter-spindle with tailstock function, groove stop function, connection to a central oil mist extraction system, external programming option via Mastercam, chip conveyor, subject to prior sale. Hsdpfxey T Nxcj Ac Ajn