Beli Universal Cnc Milling Machine bekas (66.729)

Kondisi: baik (bekas), Tahun pembuatan: 2007, Fungsionalitas: berfungsi sepenuhnya, de-hu-001 Hnedpszb I Tgofx Agkon

Kondisi: baru, Tahun pembuatan: 2024, Fungsionalitas: berfungsi sepenuhnya, - Swiveling control panel - CNC control SIEMENS 828D - Motor for horizontal and vertical spindle - Feed motors with inverter - Ball screw drives for X/Y/Z axes - Automatic 2-speed gearbox for spindle speeds - 1 pc. long milling arbor 27 mm - 3 pcs. reducing sleeves (MK1, MK2, MK3) - Pneumatic-hydraulic clamping system for the vertical spindle - Spindle guard with safety switch - Safety enclosure in the work area with electrically interlocked doors - Counter-support for horizontal milling Hsdjvupa Rspfx Agkonn - LED work light - Automatic central lubrication system - Safety handwheels for X/Y/Z axes - Coolant system with chip tray - Guideway covers - Base plates and leveling screws - Operating tools - Technical documentation - CE compliant - Colors: * RAL 7024 - Graphite grey * RAL 7035 - Light grey Technical Data: Fixed angle table: - Working surface dimensions: 1,000 x 500 mm - T-slots: Number / Size x Pitch: 8 pcs. / 14 x 63 mm - Max. table load: 250 kg Vertical table: - Working surface dimensions: 1,200 x 250 mm - T-slots: Number / Size x Pitch: 3 pcs. / 14 x 63 mm Travel: - Axis travel: automatic/manual - Longitudinal (X): 600 mm - Cross (Y): 500 mm - Vertical (Z): 400 mm Feeds: - Control: stepless - Range (X, Y, Z): 0 – 2,000 mm/min - Rapid traverse - X, Y, Z axes: 5,000 mm/min - Rapid traverse - Z axis: 4,000 mm/min Horizontal spindle: - Tool holder: DIN 2080 / ISO 40 - Speed range (2 steps): 0 – 3,200 rpm Vertical milling head: - Tool holder: DIN 69871 / ISO 40 - Speed range (2 steps automatic): 0 – 3,200 rpm - Head swivel: ±90° - Distance spindle nose to angle table: min/max.: 70 – 470 mm - Distance spindle center to column: min./max.: 160 / 660 mm Motors: Main drive power: 7.00 kW Feed drive power X-Y-Z: 2.85 kW Dimensions and weight Dimensions (W x D x H): 2,850 x 1,950 x 1,900 mm Weight: 1,950 kg

Kondisi: siap digunakan (bekas), Tahun pembuatan: 1996, Segera tersedia dari lokasi: Mesin Frais CNC Universal Reckermann Tipe Primo II Tahun pembuatan: 1996 Heidenhain TNC 430 Hodszdnt Depfx Agkenn Mounting SK 50 Kecepatan spindle variabel tanpa tingkat: 20 – 2000 rpm Kapasitas meja: 1000 kg Kecepatan feeding variabel: 20 – 6000 mm/menit Perjalanan sumbu X / Y / Z: 1000 / 400 / 350 mm Daya penggerak: 7,5 kW Berat: 4 ton Harga: EUR 2.500,-- belum termasuk PPN, ex lokasi.

Tahun pembuatan: 1991, Kondisi: siap digunakan (bekas), Perjalanan sumbu X/Y/Z: 500mm/380mm/350mm, dudukan alat: SK40, jarak gerak pinol: 50mm, kecepatan putar: 4000 rpm, laju pemakanan: 2m/menit, laju cepat: 4m/menit, ukuran meja X/Y: 800mm/360mm, beban maksimum meja: 250kg. Dimensi mesin X/Y/Z: sekitar 1650mm/2250mm/1850mm, berat: sekitar 1800kg, sistem kontrol: Maho 232. Sumbu Y mengalami gangguan saat laju pemakanan mencapai 50%. Dokumentasi tersedia. Pemeriksaan di lokasi dimungkinkan. Hnjdpfezc Rd Rox Agkon

Kondisi: baik (bekas), Mikron WF 41C CNC Universal Milling and Drilling Machine Professional, extremely robust CNC universal milling and drilling machine MIKRON WF 41C Thanks to its sturdy construction, this machine is ideal for workshops, prototyping, maintenance, or demanding toolmaking applications. The machine is equipped with the proven HEIDENHAIN TNC 155 path control system. Thanks to straightforward dialog guidance, it is extremely easy to program directly at the machine, supports graphical simulations, and allows simple uploading of external CNC programs via the serial interface (ideal for CAD/CAM applications). Hnjdpszcqf Iofx Agkjn Technical Specifications Overview CNC Control Model: HEIDENHAIN TNC 155 Operating modes: Manual (like digital readout), positioning with manual input, single block, sequence, program test (graphical simulation) Interface: V.24 / RS-232-C for data transfer Feed Drives & Travel Travel – X-axis (table longitudinal, automatic): 630 mm Travel – Y-axis (spindle slide crosswise, automatic): 500 mm Travel – Z-axis (table vertical, automatic): 460 mm (see p. 1) Feed rate: steplessly adjustable from 1 – 3000 mm/min on all 3 axes Rapid traverse rate: X and Y axes: 6000 mm/min | Z-axis: 4000 mm/min Max. vertical installation height: 559 mm (between vertical milling head and angle table) Spindle Drive Working spindle speeds: 21 geared steps Speed range: 31.5 – 3150 rpm Spindle motor power: 6.0 / 8.0 kW Tool holder: ISO 40 / M16 with draw key (SK 40 DIN 2080) Quill travel (vertical): 90 mm Table Geometry & Workpiece Capacity Angle table clamping area: 500 x 1000 mm T-slots: 7 (spacing: 63 mm, width: 14-H7 mm) Vertical clamping area: 397 x 550 mm (with 4 x 4 threaded M16 holes, 90 mm spacing) Max. recommended workpiece weight: 500 kg Electrical & Cooling Electrical power supply: 13.5 kW Coolant tank capacity: approx. 100 liters Dimensions & Weights Machine dimensions: 1745 mm (L) x 1501 mm (W) x 2124 mm (H) Max. working space required (incl. control arm): 2930 mm (L) x 2115 mm (W) x 2125 mm (H) Machine weight (net): 3,100 kg (incl. vertical milling head and angle table) "Everything from a single source: we are happy to offer tailored bank financing for your project." komplett-konzept.leasingo.de You can find more items – new and used – in our shop! International shipping costs on request!

Kondisi: baik (bekas), Tahun pembuatan: 1998, Mikron UM 710/900 Mesin Frais Universal Mesin frais universal presisi tinggi dari produsen berkualitas asal Swiss, MIKRON, model UM 710/900. Mesin ini berasal dari penggunaan yang terawat dan dikenal karena presisi khas Mikron serta area kerja yang luas (hingga 900 mm langkah sumbu X). Mesin ini sangat ideal untuk pembuatan alat, pembuatan prototipe, pelatihan, atau bengkel perbaikan yang menuntut. Hjdpfx Agjzcqcgskenn Data teknis (informasi pabrikan): Area Kerja & Sumbu: Langkah longitudinal (sumbu X): 710 / 900 mm Langkah melintang (sumbu Y): 630 mm Langkah vertikal (sumbu Z): 500 mm Spindel Kerja: Taper alat: SK 40 / DIN 69871 Tingkat transmisi: 4 Rentang kecepatan putar: dapat diatur (vertikal & horizontal) Penggerak Utama & Feed: Daya penggerak spindel: 11 kW (pada 44% duty cycle) / 7,5 kW (pada 100% duty cycle) Kecepatan feed (X, Y): 0 – 10.000 mm/menit (dapat diprogram) Kecepatan feed (Z): 0 – 8.000 mm/menit (dapat diprogram) Kecepatan rapid traverse (X, Y / Z): 10 m/menit / 8 m/menit Meja Kerja (Meja Sudut): Area penjepitan: 600 x 1.200 mm Rel T-slot: 9 buah (14-H7, jarak 63 mm) Beban maksimum meja: 500 kg Listrik, Dimensi & Berat: Daya terpasang: Total kapasitas terpasang 21,5 kW Tegangan operasi: 3 x 400 V - 50 Hz Sistem pendingin: Kapasitas 150 liter Berat mesin: sekitar 4.300 kg (termasuk pelindung) "Semua dari satu sumber: Kami dengan senang hati menawarkan pembiayaan bank yang sesuai untuk proyek Anda." komplett-konzept.leasingo.de Temukan artikel lainnya - baru dan bekas - di toko kami! Biaya pengiriman internasional atas permintaan!

Kondisi: baik (bekas), Tahun pembuatan: 2009, Fungsionalitas: berfungsi sepenuhnya, de-hu-001 Hnedpfjzaan Tsx Agken

Kondisi: baik (bekas), Tahun pembuatan: 1993, CNC universal milling machine DMG MORI Type: MH 600 C Control: MAHO 532, year of manufacture 1993. Equipped with automatic swiveling milling head (G17/G18) and B-axis rotary table. Without tool changer. For further specifications, please refer to the data sheet. Hedpfxoiihxhs Agkonn Complete machine documentation and data backup available. Good overall condition.

Kondisi: baik (bekas), Tahun pembuatan: 1986, CNC universal milling machine Manufacturer: DECKEL Model: FP5NC Year: 1986 Control: DIALOG 4 Hodpfedtdahox Agkjnn Only spare parts available. Please inquire about the parts you need.

Kondisi: baik (bekas), Tahun pembuatan: 1988, CNC universal console milling machine, manufacturer: KLOPP Type: FWS15 Year: 1988 CNC path control: Heidenhain TNC 155. Travels: X: 1170 mm, Y: 420 mm, Z: 420 mm Clamping table: 1500 x 400 mm Spindle taper: SK50 Spindle power: 15 kW Hnsdpfx Agobu Em Ajken Spindle speeds: 35–3550 rpm Counter bearing for horizontal milling, coolant system, chip tray, various tool holders, complete machine documentation. Machine immediately ready for operation Workshop tested. New parameters and batteries installed on 20/08/2020. Good overall condition. Machine can be demonstrated under power.

Kondisi: bekas, CNC tool milling machine MIKRON type WF 40C/3M with CNC path control Heidenhain TNC 310 Machine No. 440911, year of manufacture approx. 1985, overhauled and control conversion in 11/2000 Travels X: 600 mm Y: 600 mm Z: 460 mm Table size 900 x 550 mm Spindle taper ISO 40 Distance spindle nose - table max. 520 mm Spindle speed 31.5 - 3150 rpm, 21 steps Feed rate 1 - 2000 mm/min. Rapid traverse X and Y = 5000 mm/min; Z = 4000 mm/min. Quill stroke 100 mm Hnsdpfx Asw A Af Iogken Main spindle drive 4 and 5 kW Power connection 400 Volt, 50 Hz, 10.5 kW, 25 Amp. - CNC path control Heidenhain TNC 310, NC software: 286140 07, PLC software: MIKR1 - Spindle speed via 21 gearbox steps - Vertical milling head swivels right and left - Hydro-mechanical tool clamping vertical and horizontal - Central lubrication - Electronic handwheel - 62,815 operating hours (read off the display) - Control cabinet fixed to the rear of the machine - Coolant system integrated in the machine base - Swivelling control panel - Wiring diagram, operating manual for the control available Required space L x W x H 2300 x 2000 x 2150 mm Weight 2900 kg In good condition

Kondisi: bekas, CNC milling machine ABENE type VHF-360TI Serial no. 36084 Year of manufacture 2008 CNC control HEIDENHAIN TNC 320 Hjdpfoty A Ehsx Agksnn Travel distances X: 650 mm, Y: 510 mm, Z: 450 mm Table size 1200 x 400 mm Spindle taper SK 40 Spindle speed 55 - 3000 rpm, 2 stages Feed rate 30 - 4000 mm/min, stepless Rapid traverse speed (X + Y axis) 4000 mm/min Rapid traverse speed (Z axis) 2000 mm/min Distance spindle nose to table 20-495 mm Spindle drive motor power 7.5 kW Power supply 400 Volt, 50 Hz - CNC path control HEIDENHAIN TNC 320 with RS232, USB, and LAN interfaces - Electronic handwheel - Mechanical handwheels for X and Y axis - Spindle speed manually switchable in 2 gear stages (Stage 1 = 55-700 rpm) + (Stage 2 = 701-3000 rpm) - Inclined bed design with side-mounted swiveling spindle head +/- 50° - Inclined bed adjustment manual via hand crank - Hydro-mechanical tool clamping - Automatic central lubrication - Coolant system with electric coolant pump, positioned next to the machine - Machine lamp - Control cabinet mounted to the machine - Displayed control operating hours = 14,780 h - Displayed machine operating hours = 12,980 h - Displayed program run hours = 400 h Space requirement L x W x H 2600 x 2000 x 2000 mm Weight 2500 kg In very good condition.

Kondisi: baik (bekas), Tahun pembuatan: 1990, 1 used, well-maintained CNC-controlled tool milling machine in travelling column design, equipped with GRUNDIG Dialog 11 CNC path control Table size: 1600 x 675 mm Tool holder: SK / ISO 40 Travel paths: X-axis, longitudinal 1200 mm Y-axis, transverse 600 mm Z-axis, vertical 500 mm Table load capacity: 2000 kg Spindle speed range: 20 – 6300 rpm Feed range, stepless: 2 – 10,000 mm/min Rapid traverse (all axes): 10 m/min Quill stroke: 80 mm Drive power 100% duty cycle: 7.5 kW 40% duty cycle: 12 kW Hsdpfjhhuf Hox Agkjnn Machine dimensions (L x W x H): 3600 x 3000 x 2300 mm Machine weight: 6800 kg Control cabinet dimensions: 1700 x 900 x 1750 mm Control cabinet weight: 470 kg Accessories / Special Features: • CNC tool milling machine suitable for tool and jig construction, training, and mould-making applications • CNC path control GRUNDIG Dialog 11 • Screen graphics, dialog-guided input, 3D linear interpolation, circular interpolation, helical interpolation, polar coordinate input, numerous drilling and milling cycles, cycle input supported by graphics, “contour pocket” milling cycle for automatic rough-milling of irregular pockets, including those with islands, coordinate system offset and rotation • Electronic handwheel • RS 232 interface • Swiveling vertical milling head +/- 90° • Hydraulic tool clamping, DIN 2080 with clamping groove, Ott system • Quill adjustment 80 mm • Horizontal milling device • Fully enclosed safety cabin • Ball screw spindles in all 3 axes • Coolant system • Machine lighting Siegfried Volz Werkzeugmaschinen Rüschebrinkstr. 151-153 D - 44143 Dortmund - Wambel

Kondisi: baik (bekas), Tahun pembuatan: 1986, cnc-deckel-fp5nc-1986 Hnedpfx Aey H Ifbogken

Kondisi: bekas, CNC universal coordinate drilling and milling machine FEHLMANN model PICOMAX 100-CNC 3 CNC control HEIDENHAIN TNC 155 Serial no. 16186651 Year of manufacture: 1986 Spindle taper FEHLMANN SF32 Drilling capacity Ø 30 mm in steel Tapping up to M20 in steel Travel distances X: 850 mm, Y: 435 mm Quill stroke Z: 210 mm Vertical head movement 580 mm Feed rate X and Y 1 to 8000 mm/min Feed rate Z 1 to 4000 mm/min Rapid traverse X and Y 8 m/min Rapid traverse Z 4 m/min Clamping surface of table 1570 x 500 mm Distance spindle nose – table 130 - 720 mm Spindle overhang – column 450 mm Spindle speed 50 - 7100 rpm, infinitely variable Spindle drive 10 kW Total connected load 20 kW Hedpshik Ezsfx Agkjnn Power supply 400 Volt, 50 Hz - CNC control HEIDENHAIN TNC 155 with TFT monitor - 3-axis control: X, Y and Z (quill adjustment) - hydro-mechanical tool clamping FEHLMANN SF32 - tapping device - cable remote control for machine operation and axis movement - motorized vertical movement of milling head with cutoff via adjustable limit switches - 3D probe RENISHAW, type MP 11F with Fehlmann SF32 holder - 20 tool holders FEHLMANN SF32 - swing tool rack with 21 tool positions - coolant system integrated in machine base - control cabinet fixed to the machine - documentation: operating instructions, control manual, and electrical diagrams Space requirement (L x W x H): 2350 x 2000 x 2300 mm Weight: 3.2 tons Very good condition

Kondisi: bekas, CNC tool milling machine MAHO type MH 400 E Hsdpsh Ic Ufsfx Agkjnn Machine no. 43072 Year of manufacture: 1989 Travel paths X: 400 mm Y: 250 mm Z: 375 mm Table size 700 x 270 mm Distance spindle nose / table max. 410 mm Tool holder ISO 40 with pull stud type B Spindle speed 80 - 4000 rpm, 18 steps Feed rate 1-1500 mm/min, stepless Rapid traverse (X, Z, and Y) 2.5 m/min Quill stroke vertical 50 mm Spindle drive 2.2 kW Power connection 400 volts, 50 Hz, 19 kVA - Swiveling control panel with CNC path control PHILIPS 432 - LCD monitor VISCOTECH - Hydro-mechanical tool clamping - Swiveling device for vertical milling head - Splash guard enclosure as a table housing with 3 upward-folding doors - Electrical control cabinet permanently mounted on the machine - V24 interface (RS 232) for data transmission - 52,470 operating hours, main switch on - Rigid angle table - Coolant device with coolant pump located next to and under the machine - Centralized lubrication system Vogel - Operator manual, electrical diagram Required space (L x W x H) 2250 x 1800 x 1850 mm Weight approx. 1.5 tons Good condition

Kondisi: sangat baik (bekas), Tahun pembuatan: 1998, jam operasional: 17.260 h, Table size: 1000 x 500 mm Tool holder: ISO 40 Travel distances: X-axis 800 mm / Y-axis 500 mm / Z-axis 420 mm Distance between horizontal spindle axis and table: 210 – 630 mm Distance between vertical spindle nose and table: 130 – 550 mm Table load capacity: max. 500 kg Spindle speed range: 50 - 4000 rpm Infinitely variable feed range: 5 - 2000 mm/min Rapid traverse in all axes: 8 m/min Vertical milling head, swiveling: ± 90° Manual adjustment quill stroke: 100 mm Drive power: 7.5 kW Dimensions L x W x H: approx. 3000 x 2400 x 1975 mm Weight: approx. 3000 kg Accessories / Special features: • CNC path control HEIDENHAIN TNC 410 • Electronic handwheel HEIDENHAIN HR 410 • SIEMENS AC servo drives • Data interface V 24/ RS 232 • Swiveling vertical milling head ± 90° (right + left) with 100 mm quill adjustment Hjdoxtu H Nspfx Agkonn • Hydraulic tool clamping, vertical + horizontal ISO 40 • Swiveling device for the vertical milling head • Very wide speed range up to 4,000 rpm • Vibration-free operation thanks to stable, heavily ribbed gray cast iron guides • Ball screw spindles for X, Y and Z axes • All electrical controls on one side, integrated in movable control panel • Fixed angle table with folding chip guard • Coolant system integrated in machine base • Hydraulic unit • Central lubrication • CE compliant Operating hours: 17,256 Spindle hours: 3,816 Image: shows brochure photo Siegfried Volz Werkzeugmaschinen Rüschebrinkstr. 151-153 DE - 44143 Dortmund - Wambel / Germany

Kondisi: baik (bekas), Tahun pembuatan: 1987, Immediately available ex-stock. Hnedpfx Agswazwkeksn CNC control: Heidenhain TNC 155 Travel path X: 600 mm Travel path Y: 200 mm Travel path Z: 150 mm Max. workpiece weight: 300 kg Table clamping surface: 800 x 300 mm Table height: 800 mm Spindle speeds, stepless: 40–2000 rpm Drive power: 4 kW Stepless feeds in all directions Dimensions (L x W x H): 2200 x 2700 x 2400 mm Weight approx.: 2000 kg

Tahun pembuatan: 1997, Kondisi: siap digunakan (bekas), 1 Hodpfeyddyujx Agkonn

Tahun pembuatan: 1997, Kondisi: siap digunakan (bekas), Number of axes: 4, X-axis travel: 600 mm, Y-axis travel: 400 mm, Z-axis travel: 400 mm, Tool holder: ISO 40, Spindle speed: 20–4500 rpm, Feed rate: 1–4000 mm/min, Number of tool stations: 16, Max. tool diameter: 80/100 mm, Max. tool length: 250 mm, Max. tool weight: 6 kg, Control: Heidenhain CNC 234, Connected load: 40 kVA, Machine dimensions (LxWxH): 4700 mm / 4100 mm / 2300 mm, Weight: approx. 2.8 t, Operating hours: 43,408 h. The front door guide rail is damaged. Documentation available. An on-site inspection is possible. Hnsdpfxjulzlcs Agkon

Tahun pembuatan: 1994, Kondisi: siap digunakan (bekas), A Hermle CNC universal milling and drilling machine is available. Travel X/Y/Z: 700mm/550mm/500mm, quill stroke: 95mm, spindle power: 12kW, spindle speed: 4,200 rpm, spindle swivel: +/-75°, tool holder: SK40, clamping force: 12kN, feed rate: 10m/min, rapid traverse: 10m/min. Machine dimensions (X/Y/Z): approx. 4,400mm/4,250mm/2,300mm, weight: approx. 4,500kg, control: Heidenhain TNC 425. Documentation available. Inspection on site is possible. Hjdpfsw D Evlox Agkonn

Kondisi: siap digunakan (bekas), Speed: 3,150 rpm, Travel X/Y/Z: 710 mm / 500 mm / 500 mm, Number of spindle speeds: 21, Feed rate: 2,000 mm/min, Spindle taper: ISO40 / M16, Distance spindle head to table: 559 mm, Table dimensions X/Y: 500 mm / 1,000 mm, T-slot spacing: 63 mm, Max. workpiece weight: approx. 500 kg. Machine dimensions X/Y/Z: approx. 2,700 mm / 2,300 mm / 2,200 mm, Weight: approx. 3,300 kg, Control: Heidenhain TNC 155. Documentation available. Hodpjtuwk Uefx Agksnn

Tahun pembuatan: 1990, Kondisi: siap digunakan (bekas), Verfahrweg_XYZ_700mm_550mm_500mm_Tischdimensionen_XY_1000mm_490m m_Werkzeugaufnahme_SK40_Drehzahl_3150Umin_Pinolenhub_100mm_Maschi nendimensionen_XYZ_ca_3500mm_2500mm_2100mm_Gewicht_ca_3300kg_Steu erung_Heidenhain_415_Betriebsstunden_ca_64000h_Inklusive_Kuehlmit telpumpe_und_ein_gekap Hsdsxvrvgspfx Agkenn

Tahun pembuatan: 1991, Kondisi: siap digunakan (bekas), X-axis: 1600 mm, Y-axis: 800 mm, Z-axis: 800 mm, Tool holder: ISO 50, Spindle speed: 20–4000 rpm, Feed rate: 1–4000 mm/min, Max. rapid traverse: 10 m/min, Number of tool stations: 36, Max. tool diameter: 160/210 mm, Max. tool length: 315/400 mm, Max. tool weight: 15 kg, Control: Heidenhain iTNC 530, Connected load: 40 kVA, Machine dimensions (LxWxH): 5080 mm / 3650 mm / 2005 mm, Weight: approx. 16 t, Documentation available, complete retrofit in 2015. Hnodpfx Aeulzk Sjgken

Tahun pembuatan: 2008, Kondisi: siap digunakan (bekas), Horizontal spindle diameter: 100 mm, horizontal spindle speed: 3,600 rpm, horizontal spindle power: 25 kW, horizontal spindle torque: 920 Nm. Vertical milling spindle swivel range: +/-90°, vertical spindle diameter: 90 mm, vertical spindle speed: 3,600 rpm, vertical spindle power: 25 kW, vertical spindle torque: 920 Nm. Travel X/Y/Z: 1,500 mm / 500 mm / 450 mm, feed rate X/Y/Z: 4,000 mm/min, feed force X/Y/Z: 12 kN / 12 kN / 15 kN, rapid traverse X/Y/Z: 15 m / 10 m / 10 m/min. Table dimensions X/Y: 1,800 mm / 500 mm, number of T-slots: 5, center slots: 18H7, clamping slots: 18H9, center distance: 100 mm, table load capacity: 2,000 kg. Distance spindle-table (horizontal): 450 mm; distance between spindle and counter-support lower edge (horizontal): 345 mm; distance vertical spindle lower edge-table: 350 mm–800 mm; distance column brush to vertical spindle center: 100 mm–600 mm. Machine dimensions X/Y/Z: approx. 3,400 mm / 2,900 mm / 2,600 mm, weight: approx. 5,600 kg, control: Heidenhain, Operating hours: 61,440 h. An on-site inspection is possible. Hsdpfxeulku Hs Agksnn