Used Lathe Chuck for sale (7,193)

Condition: used, CNC turning machine TRAUB, Type TND 400 Serial No. 708, Year of manufacture 1996 CNC control TRAUB TX 8 F Fgodpfxezacwdj Ap Asf Nominal turning diameter: 400 mm Swinging diameter over bed: max. 470 mm Spindle bore in draw tube: 65 mm Motor power, spindle drive: 22 kW Total power consumption: 35 kW Mains connection: 380 volts, 50 Hz - Electronic handwheel - RS 232 data interface - Turret with 12 tool positions, VDI 40 - Includes 8 tool holders, VDI 40 - 3-jaw chuck, Ø 225 mm, SMW Autoblok, Type KNCS-N-Ø 225-65 Includes a large quantity of chuck jaws - Hydraulic internal expanding cylinder, SMW, Type ZHDAS-130-67 - Chip conveyor, KNOLL, Type 200 S-1/600 - Coolant system - Hydraulic unit (L x W x H 650 x 500 x 1000 mm) Space requirement L x W x H: 4800 x 2000 x 2100 mm Space requirement, base machine L x W x H: 3500 x 2000 x 2100 mm Space requirement, chip conveyor L x W x H: 4500 x 700 x 1550 mm Weight: approx. 5 tons Good condition Machine is ready for demonstration. The internal expanding cylinder for workpiece clamping needs to be repaired.

Condition: good (used), Magnetic plate, clamping plate, permanent magnet, magnetic clamping plate, magnetic clamping plate, permanent magnetic lathe chuck, magnetic round chuck -Magnetic clamping plate: permanent magnetic lathe chuck with chuck flange Fgodpfx Aewn D Twsp Ajf -Recording: MK4 -Clamping surface: Ø 160 mm -Dimensions: Ø 160 x 205 mm -Weight: 9.8 kg

Condition: good (used), Magnetic plate, clamping plate, permanent magnet, magnetic clamping plate, magnetic clamping plate, permanent magnetic lathe chuck Fsdpfexd Upfsx Ap Ajgf -Manufacturer: SFN, magnetic clamping plate permanent magnetic lathe chuck with chuck flange -Type: PUSd-200 -Clamping surface: Ø 200 mm -Bolt circle: Ø 160 mm M10 -Recording dimensions: see photos -Dimensions: Ø 200 x 60 mm -Total weight: 8 kg

Condition: used, Year of construction: 1990, turning diameter 60 mm Fgjdpfx Apet Hw Ats Aof turning length 200 mm number of slides total power requirement 20 kW weight of the machine ca. t dimensions of the machine ca. m

Condition: used, Lathe chucks and holders (VDI 30/40/50) from PLN 5/piece on request Fjdpfx Aey H Ezgop Aogf

Condition: excellent (used), Planspiral chuck Fgedeln Uixopfx Ap Asf Auto Strong Diameter 310 mm Camlock size 8 Taper diameter 139.735 6 stud diameter 25.4 Pitch diameter 171.4 Chuck height including flange 135 mm Weight 53 kg

Condition: excellent (used), I am offering for sale a high-quality RÖHM KFD-HS 200/3 hydraulic lathe chuck, designed for professional CNC lathes. The chuck is in very good technical and visual condition. It looks practically new and appears to have been used only a few times. The working surfaces and guides show only minimal signs of use. The set includes: * RÖHM KFD-HS 200/3 lathe chuck, * 3 standard jaws, * 3 RÖHM 538-55 top jaws, * operating wrench, * sturdy wooden transport box (I am not sure if this is the original box for this chuck). Fgjdjzlaqkspfx Ap Asf Technical data: * Manufacturer: RÖHM * Model: KFD-HS 200/3 * Diameter: 200 mm * Type: hydraulic 3-jaw lathe chuck * Maximum clamping force per jaw (Fmax): 48 kN * Total clamping force (Fges): 110 kN * Maximum rotational speed: 6500 rpm * Identification number: 155099 * Top jaws: RÖHM 538-55 * Country of manufacture: Germany The chuck is ideal for professional applications in machining and working on CNC lathes. It is a robust piece of equipment from the renowned German company RÖHM, which is valued for its high quality and precision.

Condition: used, CNC lathe GILDEMEISTER, type GD 160 with Gildemeister - Fanuc Mate TS control - Power chuck BERG, Ø 200 mm Fsdpfx Apey T R Iro Aegf - 12-station tool turret, VDI 40 - 6 tool holders VDI 40, installed Machine footprint with chip conveyor: L x W x H 4200 x 2200 x 2100 mm Weight: approx. 4 tons We are making room Affordable machine – ideal for export

Condition: used, Year of construction: 1999, Technical details: number of spindles: 6 Article: cam-controlled multi-spindle automatic lathe Manufacturer: Schütte Type: SG18 Yob: 1999 six-spindle automatic lathe 6 main spindles as a chucker automatic lathe control Siemens S7-200 PLC loading and disloading in position 6 spindle brake Please, contact us for getting more information and pictures on mail(at) or * Fgedpjw Hb Trsfx Ap Aof

Condition: used, Year of construction: 1995, Technical details: number of spindles: 6 Article: cam-controlled multi-spindle automatic lathe Manufacturer: Schütte Type: SFH130 Yob: 1995 six-spindle automatic lathe 6 main spindles as a chucker automatic lathe control Siemens S7-200 PLC Dnt drive loading and disloading in position 6 Fgsdpfsw Hbz Ajx Ap Ajf additional cooling pump with magnetic spark plug filter Please, contact us for getting more information and pictures on mail(at) or *

Condition: new, Year of construction: 2026, CKT 320 × 750 CNC Lathe is an advanced CNC turning machine designed for precision machining of metal components in medium and large production facilities. Equipped with the Siemens Sinumerik 808D CNC control system and a hydraulic machine configuration, it delivers high productivity, reliability, and excellent machining accuracy. Key Features of the CKT 320 × 750 CNC Lathe The CKT 320 × 750 CNC metal lathe combines precision, flexibility, and durability, meeting the requirements of professional workshops and industrial production environments. As an advanced industrial CNC lathe, it enables complex machining operations such as turning, threading, grooving, and drilling while maintaining excellent component quality. Main Advantages High machining precision – maximum swing over bed of 320 mm, swing over cross slide of 90 mm (optional 135 mm), 51 mm spindle bore, and maximum bar diameter through spindle of 44 mm ensure accurate machining across a wide range of applications. Flexible spindle system – spindle speed range of 100–2500 RPM with an MT5 spindle nose allows machining of various materials, from steel to lightweight alloys. Advanced CNC control – Siemens Sinumerik 808D Advanced with Polish-language interface and Siemens servo drives improves programming efficiency and production performance. Rigid machine construction – net weight of 1040 kg (gross weight 1300 kg) and dimensions of 2370 × 1420 × 2000 mm provide excellent stability when machining workpieces up to 750 mm in length. Efficient tooling system – 4-position turret (optional 6 or 8 positions) with 16 × 16 mm tooling reduces tool change times and improves cycle efficiency. Hydraulic components – hydraulic 3-jaw chuck and hydraulic tailstock ensure fast, precise, and reliable workpiece handling. Long service life and reliability – automatic lubrication system for gears and guideways minimizes wear and extends machine lifetime. Optimized cooling system – protects tools and workpieces, ensuring stable machining conditions and high surface quality. Wide range of applications – suitable for precision turning in mechanical engineering, automotive, and tooling industries. Energy-efficient operation – 5.1 kW (S1) / 3.7 kW motor combines high performance with optimized energy consumption. Customizable configuration – optional features such as Fanuc Oi-TF control, tool probe, and CAD/CAM software integration allow adaptation to specific production requirements. Standard Equipment SIEMENS SINUMERIK 808 Advanced CNC control system with Polish-language interface Siemens servo drives Hydraulic 3-jaw chuck 4-position turret (optional 6 or 8 positions) Complete set of soft jaws Hydraulic tailstock with MT3 center Coolant system Automatic lubrication system for gears and guideways 24V halogen work lighting Technical and operating documentation CE Declaration of Conformity Technical Specifications Specification Value Swing over bed 320 mm Swing over cross slide 90 mm (optional 135 mm) Distance between centers 750 mm Fgodpfxoi Apg Uo Ap Aof Spindle speed range 100–2500 RPM Spindle bore 51 mm Spindle taper MT5 Number of tools 6 Tool size 16 × 16 mm Maximum bar diameter through spindle 44 mm Tailstock taper MT3 Maximum tailstock travel 100 mm Main motor power 5.1 kW (S1) / 3.7 kW Machine dimensions (L × W × H) 2370 × 1420 × 2000 mm Net / gross weight 1040 / 1300 kg

Condition: new, Year of construction: 2026, CKT 560 × 1500 CNC Metal Lathe is a professional industrial solution combining advanced CNC technology with a robust machine structure, designed for production facilities requiring the highest standards of machining quality. This industrial CNC lathe enables a wide range of complex operations, including external and internal turning, spherical turning, threading, drilling, grooving, and contour machining. Key Features Exceptional machining accuracy – maximum swing over bed of 560 mm, swing over cross slide of 340 mm, and a 430 mm wide bed ensure high rigidity and precision during demanding operations. Flexible spindle system – spindle speed range of 100–800 RPM and a 75 mm spindle bore (optional 90 mm) with an A2-11 spindle nose allow machining of a wide variety of materials, from steel to lightweight alloys. Intuitive CNC control – Siemens Sinumerik 808D control system with Polish-language interface and Siemens servo drives provides a dedicated operating mode for conventional lathe users, reducing the learning curve for CNC operation. Rigid construction – with a net weight of 3600 kg and dimensions of 3770 × 1500 × 1900 mm, the machine provides excellent stability when machining workpieces up to 1500 mm in length. Efficient tooling system – an 8-position turret (optional 6-position) with 25 × 25 mm tooling enables fast tool changes and reduces production cycle times. Fast setup and adjustment – allows convenient tool setting, work zero positioning, and corrections without the need to write complete CNC programs, making it ideal for single-piece and small-batch production. Enhanced operator safety – controlled rapid movements and spindle speed limitations enable precise and safe machine operation. Extended component life – automatic lubrication of gears and guideways reduces wear and ensures long-term reliability. Optimized cooling system – maintains thermal stability and protects tools and workpieces during intensive machining. Wide range of applications – suitable for precision turning in mechanical engineering, automotive, and tooling industries, for both serial and small-batch production. Energy-efficient performance – the 11 kW main motor provides high productivity with optimized energy consumption. Integrated machining cycles – supports operations such as facing, taper turning, threading, and drilling by entering basic parameters without requiring detailed G-code knowledge. Advanced automation options – available with hydraulic chuck, hydraulic tailstock, bar feeder, and chip conveyor systems. Machine customization options – available upgrades include Fanuc Oi-TF, Siemens Sinumerik 828D, tool probes, and CAD/CAM software integration. Standard Equipment Siemens Sinumerik 808D CNC control Siemens servo drives Manual 3-jaw chuck 8-position turret Complete set of soft jaws Fgjdpfoi Apf Tjx Ap Aef Manual tailstock Coolant system Automatic lubrication system for gears and guideways 24V halogen work lighting User manual EC Declaration of Conformity Technical Specifications Specification Value Swing over bed 560 mm Swing over cross slide 340 mm Maximum workpiece length 1500 mm Spindle speed range 100–800 RPM Spindle bore 75 mm (optional 90 mm) Bed width 430 mm Spindle nose A2-11 Number of tools 8 Tool size 25 × 25 mm Tailstock taper MT5 Maximum tailstock travel 150 mm Main motor power 11 kW Machine dimensions (L × W × H) 3770 × 1500 × 1900 mm Net weight 3600 kg

Condition: used, 4 INGERSOLL adjustable chuck jaws for face plate Chuck jaws for lathe chuck, mechanical clamping device, clamping block No: 39.02.10000 / 501.397 Jaw width 70 mm Jaw length 180 mm Jaw carrier height 150 mm Base plate 325 x 265 mm Fgjdpfx Apeu Axzks Asf - Stepped jaws for turning as turning and drilling jaws - Jaw adjustment via trapezoidal threaded spindle - Jaw carrier with 6 recesses 40 x 30 mm for fastening - Distance between recesses 280 x 133 and 220 x 90 mm (centered) Dimensions L x W x H 325 x 265 x 215 mm Weight per jaw 36.5 kg Weight of all 4 jaws 146 kg Good condition

Condition: used, Technical details: Fedpfxeu Idw Is Ap Ajgf number of spindles: 11 Stück number of stations: 11 Stück taper: SK 40 air pressure - required: 6 - 7 bar total power requirement: 13 kW weight of the machine ca.: 10,2 t space requirements of the machine approx.: 4,0 x 4,0 x 3,4 m dimensions of machine: 3,4 x 3,45 x 2,9 m dimensions electric cabinet: 2,1 x 0,4 x 1,9 mm Transfermachine (drilling & cutting) Accesssories optional please enquire to this additional position! - workpiece holding turret Ø 1000mm with tool holder for 8 tool clamping stations, self centering clamping chuck jaws between the jaws, max. 20mm chuck jaw stroke ( oil pneumatic circulation) - 11 working stations with Sk40 intake (right 4x Drill-& Mill spindle and 1x mitU-axis , left 4x Drill-& Mill spindle ) - drill unit 8x spindle stroke 125mm, feed 0 - 2 m/min, 164 - 1005 rpm with 12 gears stages - thread cutting unit working stroke 125mm, rotation direction clockwise and counter clockwise, 31,5 - 194 rpm with 12 gears stages - opposite located drill units 8 pieces with SK 40 holder - coolant device with supply - control via switch panel - with swarf basin L: 1200 x W: 740 x H: 220mm i.D. *

Condition: used, Technical details: number of spindles: 15 Stück number of stations: 8 Stück control: PS 2000 weight of the machine ca.: 17,0 t total power requirement: 83,0 kW dimensions of machine: LxBxH: 2400x2800x2800 mm dimensions electric cabinet: Nr.1:LxBxH: 1000x850x2350 mm dimensions electric cabinet: Nr.2: LxBxH: 1250x650x2230 mm dimensions electric cabinet: Nr.3: LxBxH: 650x600x1700 mm dimensions electric cabinet: Nr.4: LxB.H: 1000x500x1350 mm space requirements approx. LxWxH: 5,0 x 6,2 x 3,8 m TRANSFER MACHINE with 3 work station and 15 drill & mill spindles for example the production of a high quantity of armatures Other technical information about the machine: - workpiece carrier: workpiece holding barrel Ø 800mm for 8 work piece - clamping station, cycle time of 10 sec. - drilling and milling unit: SK 40 intake; spindle stroke 125 mm; standard feed rate 1m/min; rapid traverse feed rate 4m/min; RPM max. 2240 rpm - right 3x drill-& mill spindle, 1x thread cutting spindle, 1x U-axis such as radial 2x drill-& mill spindle slideable, 1x thread cutting spindle slideable and 2x U-axis slideable - left 3x drill-& mill spindle, 1x thread cutting spindle, 1x U-axis such as radial 2x drill-& mill spindle slideable, 1x thread cutting spindle slideable and 2x U-axis slideable - 1.Thread-cutting unit: SK 40 Intake; Quill Ø 125 mm; quill-stroke 125mm; RPM 35.5 - 900 rpm; right/left - 2.Thread-cutting unit: SK 40 Intake; Quill Ø 125 mm; quill-stroke 80mm; RPM 45 - 560 rpm; right/left Equipment: Fodpfou Idxfsx Ap Asgf - 2 hydraulic aggregate - chip conveyor - belt filter produced by Filtertechnik Gera (fleece band 430mm) - control panel - manual switch i.D. *

Condition: used, Technical details: Fgedpfx Aeu Idwbep Asf spindle taper: 40 number of spindles: 9 Stück weight of the machine ca.: 10,0 t total power requirement: 13 (17,5 PS) kW dimensions of machine: LxBxH: 4100x3400x3200 mm dimensions electric cabinet: LxBxH: 2100x350x1900 mm TRANSFER MACHINE DRILL AND THREADCUTTING MACHINE - ROTARY TRANSFER MACHINE with 9x Drill-& Mill Spindles - right 2x Drill-&Mill Spindle from that 1x with U-axis flexible and 1x thread cutting unit with 9 stages flexible - left 2x Drill-&Mill Spindle from that 1x with U-axis flexible and 1x thread cutting unit with 9 stages flexible, such as radial 2x Drill-&Mill spindle and 1x thread cutting unit 9 stages, flexible - workpiece carrier with 8 clamping stations: workpiece holding barrel Ø 1000 mm (oil-pneumatic cycle), clamping station self-centering clamping jaws - Drilling: SK 40 intake; spindle stroke 125 mm; standard feed rate 0 - 2 m/min; RPM at 12 stages with 164-1005 rpm - Drill- and facing unit; SK 40 intake; spindle stroke 90 mm; standard feed rate 0 - 2 m/min; rapid traverse feed rate 7.5 m/min; RPM at 12 stages with 166 - 1020 rpm - 3 piece thread-cutting units: SK 40 Intake; Working stroke 125 mm; RPM at 12 stages with 31.5 - 194 rpm; clockwise and counterclockwise - 6 piece opposing drill units: SK 40 intake Equipment: - coolant system with feed - operation through control panel - chip box - counting mechanism - elevated platform with stairs i.D. *

Condition: used, Technical details: spindle taper: SK40 spindle stroke: 175 mm number of spindles: 8 Stück number of stations: 5 Stück cycle time: 15-20 sec revolutions per minute: bohren/drill/taladrar 225...1037 U/min. revolutions per minute: gewinde/threading/roscar 50...316 U/min. feed: 0,2 m/min total power requirement: 30 (40PS) kW weight of the machine ca.: 9,0 t space requirements of the machine approx.: 3,9x2,4x2,5 m dimensions of machine: L:3,9xB:2,2xH:2,7 m dimensions L x W x H: +Anlage/plant/planta 2,7x2,52x2,25 m The machine will be on a General overhaul (pictures from original condition at the former Company) The machine has been constructed for the metal cutting process of workpieces in one clamping session. Especially blanks made of brass with a diameter 90mm x approx 100mm length would be machined with this machine. description: - workpiece support with switch plate with clamping station type round table with horizontal axis with 5 workpiece stations processing units: Fgedpfju Idycox Ap Aof - drill spindle and thread cutting units - drill capacity up to 2 3/4" and 81,53mm in brass - thread cutting up to 2 1/2" und metric thread Machine is equipped with a feeding-and unloading unit for workpieces. ( feed capacity 3 -4 pieces/min and cycle time 15 - 20 sec.) furthermore incl. coolant device i.D. *

Condition: used, Technical details: number of spindles: 9 Stück total power requirement: 83,0 kW weight of the machine ca.: 17,0 t TRANSFERAUTOMAT with 9x drill-and mill spindles - right 3x drill-& mill spindle, 9 stages, driven, fixed and left 3x drill-& mill spindle 9 stages, driven, fixed such as radial 3x drill-& mill spindle with 9 stages, driven, fixed Fgsdeu Idvkjpfx Ap Ajf i.D. *

Condition: used, Technical details: number of spindles: 9 Stück weight of the machine ca.: 10,2 t Transfer machine with 9 Drill-& Mill spindles - right 2x drill -& mill spindle and 1x thread cutting spindle with 9 stages - left 2x drill -& mill spindle and 1x thread cutting spindle with 9 stages such as radial 2x drill-& mill spinlde flexible and 1x thread cutting spindle 9 stages, flexible i.D. Fgodpsu Idwnjfx Ap Aef *

Condition: used, Technical details: number of spindles: 15 Stück number of stations: 8 Stück control: PS 2000 total power requirement: 83,0 kW weight of the machine ca.: 17,0 t space requirement of the machine approx.: LxBxH: 5,0 x 6,2 x 3,8 m dimensions of machine: LxBxH: 2400x2800x2800 mm dimensions electric cabinet: Nr.1: LxBxH: 1000x850x2350 mm dimensions electric cabinet: Nr.2: LxBxH: 1250x650x2230 mm dimensions electric cabinet: Nr.3: LxB.H: 650x600x2300 mm dimensions electric cabinet: Nr.4: LxBxH: 1300x650x2350 mm TRANSFER MACHINE with 3 work station and 15 drill & mill spindles - for example the production of a high quantity of armatures Other technical information about the machine: - workpiece carrier: workpiece holding barrel Ø 800mm for 8 work piece - clamping station, clock cycle of 10 sec. - drilling and milling unit: SK 40 intake; spindle stroke 125 mm; standard feed rate 1m/min; rapid traverse feed rate 4m/min; RPM max. 2240 rpm - right 4x drill-& mill spindle with 18 stages and 1x thread cutting spindle hydr. 14 up to 224 U/min, left 4x drill and mill spindle with 18 stages and 1x thread cutting spindle hydr. from 14 up to 224 U/min such as radial 3x drill -and mill spindle from that 1x U-Axis and 1x thread cutting spindle 1.Thread-cutting unit: SK 40 Intake; Quill Ø 125 mm; quill-stroke 125mm; RPM 35.5 - 900 rpm; right/left 2.Thread-cutting unit: SK 40 Intake; Quill Ø 125 mm; quill-stroke 80mm; RPM 45 - 560 rpm; right/left Equipment: - 2 hydraulic aggregate - chip conveyor - belt filter produced by Filtertechnik Gera (fleece band 430mm) - control panel - manual switch i.D. Fgjdpfx Apeu Idxro Asf *

Condition: used, Collet set, chuck collet holder for draw-in collets WEILER Collet chuck, collet holder, collet device Suitable for WEILER Praktikant lathe, year of manufacture 1984 Draw-in collet type: FM 613 / 386E DIN 6341 Collet diameter: 32 mm Collet length: approx. 115 mm Collet thread: TR 32 x 1.5 mm - Collet holder sleeve with MK 5 external taper (Ø 44 mm) - Draw tube with internal thread M 32 x 1.5 mm, handwheel for manual tightening of the collet Fjdpfjy Ra Dqex Ap Ajgf - 15 pieces FAHRION collets: Ø 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 mm - fits WEILER Praktikant and should also fit WEILER Matador Total weight: 10.5 kg Very good condition

Condition: used, Turret lathe, lathe with copying device, UMA Type F1 NK 60 Copying lathe for chucked workpieces Machine No. 28-0031, Year of manufacture 1971 Turning diameter max. 150 mm Fjdoib D H Repfx Ap Aegf Swing diameter over bed 400 mm Turning length approx. 200 mm Spindle bore in the machine spindle approx. 42 mm Spindle speed 580 - 930 - 1480 - 2380 rpm, 4 steps Main motor power 5.5 kW Power connection 380 Volt, 50 Hz - Spindle flange for chuck mounting, short taper 55021, size 6, flange outer diameter Ø 180 mm - Spindle speed via 4 gear stages - Hydraulic clamping device with expanding mandrel, without spindle bore, clamping diameter Ø 15 mm - Right side with copying slide, copying device SAUTER Type KMCA 61, with hydraulic feed movement - Left side with cross slide with hydraulic feed movement - Coolant system installed under the machine bed - Hydraulic unit located behind the machine - Operating manual, electrical diagram, hydraulic diagram Space requirement for turret lathe with hydraulic unit L x W x H 2900 x 1900 x 1700 mm Space requirement for turret lathe L x W x H 2400 x 1900 x 1500 mm Space requirement for hydraulic unit L x W x H 1400 x 850 x 1700 mm Weight of turret lathe 2400 kg Weight of hydraulic unit 400 kg Total weight with pallet 3000 kg Good condition

Condition: used, Dividing Head Center Height: 100 mm Fgjdpfx Apoy E T Dgj Aef Transmission Ratio: 40:1 Spindle Taper: SK 40 with M16 draw thread Clamping Surface: 240 x 200 mm Grid Pattern on Clamping Surface: 210 x 125 mm, Ø 14 mm - 3-jaw chuck Ø 125 mm with step jaws - Crank handle with indexing plate and sector arms - Crank handle with swing-out indexing plate for direct dividing - 1 indexing plate with hole counts: 15, 18, 21, 29, 37, 43, 51 - 1 indexing plate with hole counts: 16, 19, 23, 31, 39, 47, 53 - 1 indexing plate with hole counts: 17, 20, 27, 33, 41, 49, 57 - 24-position index (15° increments), graduated scale on work spindle - Complete dividing head, rotatable and tiltable on the base plate Dimensions (L x W x H): 410 x 370 x 300 mm Net weight: 48 kg Good condition

Condition: used, Year of construction: 1989, functionality: fully functional, workpiece weight (max.): 13,000 kg, TORNIO PARALLELO usato da 500x5000mm, TIANSHUI SPARK mod. CW61100E, anno '89. Fgsdpfx Aszg Tz Ssp Asf

Condition: excellent (used), diverse lathe chucks and face plates as shown in the pictures Fgjdpsfr T N Uofx Ap Aef