Used Dvs Buderus Cylindrical Grinding Machine - Universal for sale (65,583)

Condition: good (used), Year of construction: 2018, 0 40 kW air pressure 5 bar range L-W-H 2850 x 2470 x 2290 mm weight 7.000 kg External grinding, internal grinding, hard turning, measurement DVS UGrind – Incredibly impressive. – Efficient complete machining with grinding, turning and measuring tools on a single multifunctional head – Ideal for small to medium batch sizes of shafts and chuck components with a centre-to-centre distance of up to 1,200 mm – Machine bed made of natural granite for high dynamic and thermal rigidity – Consistently precise machining results thanks to a hydrostatically supported tailstock – Faster achievement of targetdimensions thanks to the intuitive DVS UCee operating system – Footprint of just 7 or 8.5 m²,including coolant system. --> BUDERUS, Type: U-Grind 800 Pjdpfxsz Ek Abj Alwjrb --> Control system: Bosch Rexroth MTX, IndraControl L45.1, 15" display --> Centre distance: 1.200 mm --> Max. outer diameter: 350 mm --> Max. workpiece weight between centres: 50 kg - Cross slide: X-axis - --> max. travel: 500 mm --> max. speed: 30 m/min --> resolution: 0.1 µm - Longitudinal slide: Z-axis - --> max. travel: 800 mm --> max. speed: 30 m/min --> Resolution: 0.0005 – 0.1 mm - Multifunction head (B-axis) - --> Swivel range: -45° to +225° --> Swivel time for 180°: Positioning accuracy: 0.0002° --> Repeatability: 1" --> Resolution: 0.001° - External machining - --> Max. machining length: 750 mm --> Peripheral speed: 50 corundum / 80 CBN --> Drive power: 15 kW --> Max. wheel dimensions: Ø400 x 50 x 152.4 mm - Internal machining - --> Max. bore diameter: 250 mm --> Max. bore depth: 235 mm --> Drive power S1: 1.8 – 7.5 --> Speed range: 30.000 to 50.000 rpm - Workpiece spindle C-axis - --> Max. speed: 1.500 rpm --> Drive power: 1.8 kW --> Drive torque: 90 Nm --> Measuring system resolution: 0.001° --> Roundness accuracy: 0.8 µm --> Positioning accuracy: 0.0001° - Tailstock - --> Quill stroke: 50/80 mm --> Quill diameter: 60 mm --> Bearing: hydrostatic --> Fine adjustment for cylindricity corrections: ±40 µm - 3-point centre - --> Clamping range: Ø20 – Ø150 mm --> Coarse adjustment: 40 µm --> Fine adjustment: 2 µm --> Feed rate: infinitely variable Highlights: > Complete machining in a single set-up. Turn whatever can be turned; grind whatever needs grinding. > Short set-up times, quick to programme – a machine that’s a pleasure to work with and gets the job done quickly. > Intuitive and ergonomic: good accessibility, crane loading, intuitive operation via touchscreen and ready-made programme modules. > Compact footprint thanks to integrated coolant treatment > Optional automation solutions: with our ULoad or a customised solution, for example from rbc robotics, the DVS UGrind can also operate fully automatically.

Year of construction: 1987, condition: used, A Studer CNC universal cylindrical grinding machine in need of repair is offered. Mains voltage/frequency: 380V/50Hz, control: Siemens SINUMERIK System 3, drive system: Siemens SIMODRIVE, measuring system: Marposs E5. Including various accessories. Documentation available. An on-site inspection is possible. Pjdpfx Aszxhk Eolworb

Condition: used, MYFORD MG 12 HM UNIVERSAL CYLINDRICAL GRINDING MACHINE MAKE MYFORD, MADE IN ENGLAND MODEL MG 12 HM YEAR MID 90s SWING 127.0 mm LENGTH 305.0 mm PLUS HYDRAULIC MOVEMENT DROP DOWN INTERNAL INFINITELY VARIABLE SPEED CONTROL ON THE WORK HEAD SPARE SWIVELLING WORK HEAD Prodpfxsy Nmg Ao Alweb RANGE OF TOOLING

Condition: used, Year of construction: 1990, grinding diameter 360 mm grinding length 1000 mm centre height 180 mm max. workpiece weight between centres 250 kg Maschine mit sehr wenigen Betriebsstunden nach Überholung beim Karstens Fachbetrieb. Zustellsteuerung Jetter Digitalanzeige Innenschleifvorrichtung Reitstock mit Zylindrizitätsfeinverstellung Hydraulische Reitstockpinole Etc... Luftkissenschnellverstellung Schleifspindelstock Pjdpfx Asxbh Ebjlwjrb

Condition: used, Universal external and internal cylindrical grinding machine CINCINNATI - MSO, Type R75 Serial No. 27782, Year of manufacture 1976 Center distance max. 805 mm Workpiece grinding length max. 800 mm Center height 130 mm Swinging diameter max. 250 mm Workpiece grinding diameter max. 250 mm Workpiece weight between centers max. 75 kg Workpiece weight in chuck max. 20 kg Workpiece spindle speed 50 - 390 rpm Prjdpsz Ek Sijfx Alweb Tailstock internal taper MK 5 Tailstock short taper flange DIN 55027, Size 5, Ø 82 mm Tailstock spindle bore 38 mm Headstock internal taper MK 3 Grinding wheel diameter max. 300 mm Grinding wheel width max. 40 mm Grinding wheel peripheral speed 30 m/sec Tailstock quick traverse 50 mm Automatic tailstock feed 0.005 to 0.03 mm Manual feed 0.0025 mm Hydraulic table movement 0.05 - 6 m/min Motor power grinding spindle 3 kW Motor power workpiece spindle 0.75 kW Motor power internal grinding attachment 0.75 kW Power connection 380 Volt, 50 Hz - Feed and plunge system, manual or automatic feed - Grinding spindle swivels +/- 90° - Workpiece spindle swivels 0 to 90° - Table tilt for taper grinding up to 10° - Counter support / quill for the workpiece spindle with internal taper MK 3 - Internal grinding spindle missing, internal grinding attachment for swiveling - Coolant system adjacent - 1 diamond grinding wheel dresser - 3 grinding wheels with grinding wheel arbors - 1 grinding wheel without grinding wheel arbor - 1 grinding wheel puller - 1 reducing sleeve - 3 centering pins - Several drive dogs - Operating manual with electrical diagram Space requirement L x W x H 2350 x 2000 x 1600 mm Weight 2500 kg Good condition

Condition: used, Year of construction: 1989, Technical details: grinding diameter: 300 mm grinding length: 540 mm centre height: 175 mm total power requirement: 20 kVA centre distance: 1000 mm Pedpfxjy Nk Hme Alworb

Year of construction: 2018, condition: used, overall weight: 10,000 kg, total length: 2,300 mm, total width: 6,500 mm, total height: 2,400 mm, BUDERUS CNC 235 – CNC Grinding and Machining Center Machining / Spindle 2 machining areas / channels Max. machining length: 150 mm Max. swing diameter: Ø 310 mm Workpiece spindle speed: 0–3,000 rpm Spindle bore: Ø 45 mm Workpiece spindle positioning via C-axis Table speed X/Z: 0–30 m/min Motor Spindle WMZ / DVS Type: GS 205-045/17 Year of manufacture: 2014 Automation Automatic workpiece feed / conveyor system Coolant / Filtration System LIQUI-Filter GmbH System: UR1060 / MW260 / Gamma 13 Tank capacity: 2,400 l Year of manufacture: 2015 Cooling System HYFRA gamma 13-F-S Cooling capacity: 13 kW at 32 °C Year of manufacture: 2015 Measuring Technology JENOPTIK post-process measuring technology Year of manufacture: 2018 Supply Data 3 × 400 V / 50 Hz Installed power: approx. 45 kW Pedpfszwa Rhox Alworb Compressed air requirement: 15 Nm³/h at 5 bar Control: Siemens SINUMERIK 840D Travel Z-axis: 300 - mm Workpiece diameter over bed max.: 150 mm Weight approx.: 10,000 kg Dimensions (LxWxH) approx.: 2300 x 6500 x 2400 mm Travel X-axis: 1240 - mm Year of construction: 2,018 Condition: good Terms of payment: 100% prepayment before pick-up Terms of delivery: Free loading on truck under power: No

Condition: new, JAINNHER Universal cylindrical grinding machine (SHU-321M / ШУ-321М) For sale is a JAINNHER SHU-321M / ШУ-321М universal cylindrical grinding machine. NEW condition . Surplus Inventory. Quantity discount available. If you are interested, please do not hesitate to contact us! APPLICATION Designed for precision grinding of external, end, conical and internal surfaces of high-precision cylindrical and cone-shaped parts. SPECIFICATIONS: Workpiece diameter Ø 0.025 – Ø 350 mm Distance between centers 750 mm Max. part weight (kg) Centers, 80 / In cartridge, 20 Wheelhead and feed Angle of rotation Deg. ± 15° Standard grinding wheel dimensions: OD x Width x ID, 405 x 32-50 x 152.4 mm Spindle speed rpm 1650/1850/2100 Longitudinal travel length 250 mm Feed handle One turn (diameter) 2 One division (diameter) 5 microns Headstock Spindle rotation Live/stationary center Angle of rotation Towards the operator 30°/From operator 90° Pedpfxshwmhgo Alwsrb Spindle speed rpm 6 speeds 50Hz: 50, 75, 100, 150, 200, 250 Central taper MK No. 4 / Quill taper MK No. 4 Through hole diameter mm 25/Tailstock Quill diameter mm 32 Table Rotation angle toward/away from operator 4°/9° Working distance One revolution 12.5 Feed mm/min. 50-4000 Attachment for internal spindle speed 20 000 rpm. Drive Drive KW (hp) 0.75 (1)/Headstock spindle KW (hp) 3.7 (5) Headstock spindle KW (hp) 0.4 (1/2) Spindle Lubricant Pump KW (hp) 0.1 (1/8)/Coolant pump kW (hp) 0.2 (1/4) Tank capacity Wheelhead spindle grease tank l (gallons) 24 (6) Hydraulic tank l (gallons) 60 (15)/Coolant tank l (gallons) 80 (20) DIMENSIONS: 3560 x 1520 x 1650 mm Net weight Approx. 2300 Kg Included equipment and accessories: Grinding wheels Wear parts kit (for 5000 hours of operation) Spare belts Set of fitter's and assembly tools (Box with tools) Diamond for dressing grinding wheels Spindle for internal grinding Set of mandrels for internal grinding. Adapter flange for 3-jaw chuck 3-jaw chuck ø200 mm. Full list available after request for more information.

Year of construction: 2014, condition: ready for operation (used), A Karstens cylindrical grinding machine from 1992, which was completely overhauled and modernized in 2014, is available. Center width: 1000mm, center height: 180mm, grinding diameter: 360mm, max. workpiece weight center/flying: 250kg/70kg, grinding wheel diameter: 400mm. Spindle holder: MK4, speed: 450rpm, swivel range: 90°, quill holder: MK4, quill stroke: 45mm, quill force: 600N. Table swivel: 10°, infeed spindle: 80mm, rapid traverse: 50mm, coarse adjustment: 280mm, weight: approx. 3800kg. Including 3x centering points and grinding wheels as good as new. Documentation available. On-site inspection is possible. Pedpfx Ajv Suftjlwjrb

Condition: used, Year of construction: 1982, grinding diameter 630 mm grinding length 600 mm centre height 320 mm Maschine wird überholt nach Kellenberger Messprotokoll und neu lackiert. Die anfällige Güttinger Steuerung wird durch die zeitgemäße BEMA X Steuerung ersetzt. Das heißt die Maschine erhält in diesem zuge auch eine komplett neue Elektrik. Siehe Beispielfotos. Maschine mit verstärktem Werkstückspindelstock zum Prsdovq R Uzjpfx Alwjb fliegend Schleifen von schweren Werkstücken. Die Werkzeugmaschine entspricht zum derzeitigen Zeitpunkt nicht den grundlegenden Sicherheits- und Schutzanforderungen wie in der BetrSichV 2015 genannt. Eine Anhebung des erforderlichen Mindest-Schutzzieles ist mittels einer Gefährdungsbeurteilung nach BetrSichV zu ermitteln.

Condition: as good as new (ex-display), Year of construction: 2025, Offered is a CNC controled universal cylindrical grinding machine EMAG Weiss W 11 CNC. The machine is suitable for external-interna- face and cylindrical grinding. The W 11 CNC cylindrical grinding machine is perfect for one-offs- / prototype- and serial production. This cylindrical grinding machine is also used for sample production in the field of training and maintenance. CONTROL Eckelmann TECHNICAL DATA Workpiece length: max. 1.500 mm Center height: 200 mm | Option 320 mm Workpiece weight: 250 kg Prsdpfx Aer Ey Huslwsb Workhead: MK 4 | Option MK5 / MK6 Tailstock: MK 4 TOOL CARRIER Single wheel straight / incliend, but also possible 2 wheels on B-axis combined with internal grinding spindle. Price, delivery time and equipment of the machine according to agreement.

Condition: used, Year of construction: 1977, grinding diameter 350 mm grinding length 1000 mm centre height 175 mm grinding wheel diameter 400 mm grinding wheel width 50 mm bore 127 mm MK5 work piece spindle speed 20-400 U/min grinding head swivelling 360 ° grinding spindle head - swivable 180 + - ° grinding spindle speed 1500,1700,2200 U/min 0,001-0,030 mm/Ø 0-0,95 mm/Ø ±8 ° longitudinal feed of the table 1300 mm table speeds 0,02-6 m/min 130 kg 130 inkl. Spannugkg kg 70 mm total power requirement 6,5 kW weight of the machine ca. 2,5 t dimensions of the machine ca. 4,2 x 2,0 m Neu geliefert an Universität. 2018 übernommen. Dann komplett bei BEMA gewartet und an an Einmannbetrieb geliefert. Predpfxoynmpgj Alwsb Nun wird die Maschine nochmal gewartet und Tischgeometrie neu hergestellt. 2-Achsen-Digitalanzeige Fagor nachgerüstet. -Reitstock mit Feinverstellung -Innenschleifeinrichtung -Kühlmittelanlage Zubehör auf Anfrage

Condition: used, Technical details: swing diameter: 200 mm centre distance: 450 mm cross travel: 245 mm longitudinal feed: 830 mm table speed: 0,05-4,5 stufenlos m/min revolution per minute: Schleifspindel 1780, 2050 U/min revolution per minute: Werkstückspindel 50-500 U/min dimensions of grinding wheel: 350x32x127 mm Table dimensions: 2200x280 mm table swivelling to both sides: 9°vor+10°zurück Grad total power requirement: 6,0 kW weight of the machine ca.: 2,2 t dimensions of machine: 2,2x2,05x1,6 m Universal Center Grinding Machine without internal grinding device! - for precision grinding of outer, inner such as cone surfaces - feed of grinding headstock via hydr. or manual possible Prsdpfx Alsu Ng Dgewsb - table feed hydraulic stepless - grinding spindle swivelable with 60 degrees - workpiece headstock 90 degress swiveable with tapper MK4 - tailstock tapper MK 3 equipment: - dressing device/extruder - coolant tank incl. pump and supply i.D. *

Condition: used, Year of construction: 2004, grinding diameter 250 mm grinding length 650 mm centre height 125 mm Maschine wird mit Wartung und neuer Geometrie verkauft Betriebsstunden bisher 12260 Prodpfxsywntys Alweb Reitstock mit Feinverstellung Schleifspindelstock schwenkbar mit 5° Hirtverzahnung Papierbandfilter Marposs Messeinrichtung Innenschleifeinrichtung

Condition: used, grinding diameter 450 mm grinding length 1000 mm centre height 225 mm Fotos von bereits gelieferten Maschinen. Mechanische Überholung: -komplette Maschine nach Kellenberger Messprotokoll überholt -Neue servicefreundliche Kabine -Neulackierung Elektrische Überholung: -FANUC Steuerung mit BLUE-SOLUTION -Neu aufgebauter Schaltschrank -Neue Antriebstechnik -Austausch sämtlicher elektrischer Leitungen Berus Druckschalter etc. Psdpfx Aezkvucolwerb -Neue Absolut-Glasmaßstäbe in x- und z -Neuer Absolut Drehgeber (Bei-B-Achse) Fotos von bereits gelieferter Maschine mit anderen Optionen. Schleikopfvariante UR/RS: -Schleifscheibenanordnung für Aussen -und für Schrägeinstichschleifen hintereinander! -Dadurch jeweils 400mm Scheibendurchmesser! -Dadurch wesentlich geringere Kollisionsgefahr -Einfacheres programmieren -Schleifscheibenausrüstung jeweils 400x63x127mm -Einrichtung zum Betrieb einer HF-Spindel -Spindel optional gegen Aufpreis -B-Achse CNC gesteuert zum Aussen-Plan- und Innenschleifen in einer Aufspannung. Schwenkbereich +10°/-270° -C-Achse zum Polygonschleifen -Unterteil fest -Schleifkopfmotor 10,0 KW -Reitstock -Marposs Messsystem zur Schleifscheibenvermessung. -Längspositionierung Marposs

Condition: excellent (used), With DRO With internal grinding attachement Center height 240 mm Distance between centers 2500 mm Grinding wheel 700 x 200 x 305 Grinding wheel speeds 890 / 1'120 rpm Workpiece spindle head 90° rotation Taper in tailstock MK5 Misc. accessories Prjdpfx Alszhmfyowjb MARCELS MASCHINEN AG

Condition: used, Year of construction: 1982, grinding diameter 630 mm grinding length 600 mm centre height 320 mm Machine with heavy duty workhead. Prodpfx Alev Dxxzoweb Machine will be partial overhauled before delivery. Machine will get a geometry protocoll according to the Kellenberger new machine guideline

Condition: used, Year of construction: 1982, Technical details: grinding diameter: 350 mm grinding length: 1000 mm centre height: 225 mm grinding length: max. 1600 mm centre distance: 1540 mm spindle bore: 38 mm max. swivability: 90 ° Podpow Rktzofx Alworb weight of the machine ca.: 6,0 t dimension machine xH: 4,4 x 2,45 x 2,3 mm Machine with CNC package and DFU connection Multi-range measuring head for interrupted surface Tailstock with cylinder error correction Final balance balancing device *

Year of construction: 1988, condition: used, Tschudin cylindrical grinding machine. Predpfx Aloz Dpzmewsb

Condition: used, Year of construction: 1980, Technical details: grinding diameter: 380 mm Prsdpfxjwy Ri Ns Alwob grinding length: 1000 mm centre height: 180 mm grinding wheel diameter: 400 mm max. workpiece weight between centres: 250 kg total power requirement: 10 kW weight of the machine ca.: 4,1 t dimensions of the machine ca.: 3 x 2 x 1,6 m with internal grinding attachment with fixed and swivelling headstock with coolant tank *

Condition: excellent (used), grinding diameter 155 mm grinding length 400 mm centre height 80 mm Q U O T A T I O N We are pleased to offer you ex our stock, subject to prior sale, and error in technical data : STUDER (CH) Universal Precision Cylindrical Grinding Machine Model S 20-12 Year Height of centers / Grinding Ø 80 / 160 mm Center distance / Grinding length Z-axis 400 / 420 mm Internal Grinding Ø mm Workpiece weight flying / between centers max. 5 / 20 kg Table speeds 0,1 – 3,5 m/min Table way automatic, min. 1 mm Podpfx Alozbczxsworb Table swivable max. 30 ° Universal Grinding Head cross way max 170 mm Rapid infeed way 30 mm Infeed way 1,9 mm Feeds 0,001 – 0,04 mm/Ø Swivable 10 / 30 ° Grinding wheel dimension : bore x width x Æ 127 x 30 x 300 mm Internal Grinding device separately mounted mm Workhead Fitting taper/conus MK 2 Speeds 60 – 1.200 rpm Spindle drive 2,2 kW Total electric load approx.. 5 kW - 400 V – 50 Hz Weight approx. 1.000 kg Accessories / Special Features: • Electrohydraulic conventional control with PHILIPS Digital Readout for the infeed (x-axis) • Preinstalled automatic cycles for plunge-in grinding, traverse grinding, internal grinding with roughing, finishing, fine-finishing, spark-out • Separately mounted Internal Grinding Device with belt-driven internal grinding spindle • Workhead with Quck-release collet chuck, swivable 90° • (right now the machine is not equipped with a tailstock, an original STUDER tailstock; used can be supplied for approx.. EUR 5.000,--) • Wet grinding equipment with coolant filtration unit, separate electric cabinet, manuals Condition : Very good ! Universal machine for all sorts of grinding tasks ! Video : ! Delivery : immediately available, FCA Metzingen Payment : 100 % Net, before loading

Condition: used, grinding diameter 350 mm grinding length 600 mm centre height 175 mm grinding wheel diameter 400 mm grinding wheel width 50 mm bore 127 mm MK5 work piece spindle speed 20-400 U/min grinding head swivelling 360 ° grinding spindle head - swivable 180 + - ° grinding spindle speed 1500,1700,2200 U/min 0-9,99 mm/Ø 0-9,99 mm/Ø ±10 ° longitudinal feed of the table 1100 mm table speeds 0,02-6 m/min 130 kg 130 inkl. Spannung kg cross travel max. 270 mm 80 mm tailstock quill taper MT 3 quill travel 30 mm total power requirement 6,5 kW weight of the machine ca. 3,05 t dimensions of the machine ca. 4 x 2 m Overhauled according to Kellenberger guidelines including new, modern and future-proof control system. Photo of already delivered machine in centre distance 1000mm. -Operation via the touch panel is extremely simple. -The symbols on the control panel are practically identical to the original original control system, so there is no need for familiarisation. -Diagnostic function with display of PLC messages and digital I/O -Dressing function can be extended or changed at the customer's request. -Orientated spindle stop of the workpiece spindle possible on request. -New maximum infeed of 40 mm can be extended on request. -Digital display in 2 axes. Resolution x-axis 0.5my Options: -Encoder with digital display in the workpiece headstock -Rotary encoder with digital display in the grinding headstock (no height adjustment with spindle possible) with spindle possible) -New stable internal grinding device diameter 80mm or 100mm with height adjustment. -Increase of the centre height to max. 225mm -Speed control for the grinding spindle Included: -Operating tool -Clamping tube for chuck Further accessories on request. The x-axis of the machine has an electronically controlled infeed system with stepper motor drive. Hydraulic longitudinal and rapid traverse table movement. Versatile application in production for external cylindrical and internal internal grinding or for external, face and internal grinding in one clamping Podpfxeuxft Ej Alwsrb clamping of individual parts. Possible options: -Semi-automatic dressing cycles for external and internal grinding -automatic dressing compensation. -Measuring control

Condition: used, Year of construction: 1999, grinding diameter 350 mm grinding length 1000 mm centre height 175 mm Control FANUC 18i-TA GENERALÜBERHOLT Foto von ähnlicher bereits gelieferter Maschine - Schleifscheibenausrüstung LINKS 500mm - Schleifscheibenausrüstung RECHTS 400mm - Innenschleifeinrichtung 120mm für riemengetriebene Innenschleifspindeln (standard) - CNC-Steuerung FANUC 18i-TA - vorbereitet für Messsteuerung Marposs kombiniert (Minialsar, Positionar)mit E5N - B-Achse - Kel-Set - hydraulischer Pinolenrückzug - Mikroverstellung am Reitstock - Werkstückspindelstock mit schwenkbarem Unterteil - Schleifscheibenausrüstung LINKS 500mm - Schleifscheibenausrüstung RECHTS 400mm Pjdpfxsy U N Hpj Alwerb - Innenschleifeinrichtung 120mm für riemengetriebene Innenschleifspindeln (standard) - CNC-Steuerung FANUC 18i-TA - vorbereitet für Messsteuerung Marposs kombiniert (Minialsar, Positionar)mit E5N - B-Achse - Kel-Set - hydraulischer Pinolenrückzug - Mikroverstellung am Reitstock - Werkstückspindelstock mit schwenkbarem Unterteil

Condition: like new (used), Year of construction: 2019, functionality: fully functional, CNC cylindrical grinding machine Lizzini IG-FL Year of manufacture: 2019 Condition: Absolutely new Control system: Siemens 840D sl Equipment: - 2 external grinding wheels Pjdpfx Aljz E Hyvoworb - 1 internal grinding attachment with C-axis and fully controlled B-axis Distance between centers: 1000 mm Distance between centers (height): 200 mm

Condition: used, Year of construction: 2002, grinding diameter 250 mm Podpfx Alsvx Dvujworb grinding length 400 mm centre height 125 mm Control Fanuc 21i-T Maschine gewartet und teilüberholt. -Neue Schleifspindellagerung -Neue x-Achs Spindel -Obertisch überschliffen -Neue Geometrie Tischgeometrie -Neue Geometrie WSS zu Schleifspindeln B-Achse mit 1° Hirth Verzahnung Längspositionierung HF-Innenschleifspindel GAP Papierbandfilter