Used Universal Milling Head Sk50 for sale (18,990)

Condition: excellent (used), 1 used, very well-maintained universal milling head System "HURON" with hydraulic tool clamping, coolant through spindle (IKZ), compressed air, and electrical tool release signal. Manufacturer: SEMPUCO, Origin Germany Model: KFU 2-45 Version 025 Technical data: Spindle connection, DIN 2079: ISO 50, for tools according to DIN 69871 + 69872, Type A Overhang: 377 mm Max. speed range: 3500 rpm 3750 rpm 50% duty cycle/hour 3750 rpm 30% duty cycle/hour Max. drive power: 15 / 22 kW Operating pressure for tool release: 100 + 5 bar Pressure through the spindle, coolant: max. 80 bar Pressure through the spindle, air: max. 10 bar Dimensions L x W x H: 450 x 305 x 360 mm Weight: approx. 180 kg Accessories / Special features: • 2 manual swiveling axes System "HURON" • Hydraulic tool clamping • Electrical tool release signal • IKZ - Coolant through the spindle • Compressed air through the spindle for blowing out the tool holder • For retrofitting to conventional, NC, or CNC milling and bed milling machines or boring machines (e.g.: AUERBACH, UNION, MTE, LAGUN, CORREA, ZAYER, CME, AYCE, SACEM, JUARISTI, ARSENAL, ...) Siegfried Volz Werkzeugmaschinen Dodpfxozavrbj Apbscn Rüschebrinkstr. 151-153 DE - 44143 Dortmund-Wambel / Germany

Condition: new, 1 brand-new universal milling head system "HURON" with hydraulic tool clamping Manufacturer: EMENA - MTE, Origin: Spain Model: VAR 3 - BF, BM, COMPACT Technical data: Spindle mounting: DIN 69871 ISO 50 Overhang: 358 mm Max. speed range: 3000 rpm Max. drive power: 22 kW Mounting flange: Outer diameter: Ø 306 mm Dimensions L x W x H: 460 x 306 x 360 mm Weight: approx. 150 kg Accessories / Special features: • 2 swivel plane system "HURON" • Hydraulic tool clamping • For retrofitting to conventional, NC or CNC milling machines or panel milling machines or drilling machines (e.g.: MTE, LAGUN, CORREA, ZAYER, CME, ANAYAK, AYCE, SACEM, JUARISTI, UNION, ARSENAL, AUERBACH, ...) Delivery time: approx. 12-14 weeks after order receipt Siegfried Volz Werkzeugmaschinen Rüschebrinkstr. 151-153 Djdpfx Apjzdbxbjbocn DE - 44143 Dortmund-Wambel / Germany

Condition: like new (used), 1 unused universal vertical milling head, suitable for an ORADEA / EURO-MILL FUS 32 Design: “MAHO”, ISO 40 shank, quill stroke 100 mm, designed drive power approx. 3-4 kW, max. speed 2000 rpm, … Dcedpfx Aeddtwbepbon Optional accessories: - Multiplier, gear ratio 1:4, ISO 40 shank Price: EUR 499.00 - Attachment for automatic feed device for the vertical milling head quill, “MAHO” system, 6 feeds 0.02 - 0.2 mm/rev Price: EUR 1,880.00 - Cross milling head, additional head for the vertical milling head with spindle taper ISO 30, rotatable, 360 degrees Price: EUR 585.00 plus statutory VAT. Siegfried Volz Werkzeugmaschinen Rüschebrinkstr. 151-153 DE - 44143 Dortmund - Wambel / Germany

Condition: excellent (used), Knuth UFM 2 Universal Milling Machine Technical Specifications Travel X-axis (manual) 800 mm Travel X-axis 750 mm Travel Y-axis 300 mm Travel Z-axis 400 mm Table size 1320x320 mm T-slots 5x14x63 mm Feeds Y-axis travel (8) 20 - 360 mm/min Z-axis travel 600 mm/min Spindle speed (12) 58 - 1800 min-1 Vertical spindle taper SK 40 Distance between spindle nose and table 0 - 400 mm Head swivel 45° Taper of horizontal spindle SK 50 Drive Main motor power 4 kW Motor power in the Z-axis 0.75 kW Feed motor power 0.55 kW Coolant pump motor 0.09 kW Coolant pump capacity 25 l/min Dimensions and Weight Dimensions 1900x1720x1750 mm Weight 2100 kg Dcsdpfxenfu Ris Apbsn You can find more new and used items in our shop! International shipping costs available upon request!

Condition: ready for operation (used), Year of construction: 1989, Immediately available from training center: Universal Milling Machine Horizontal - Vertical WMW Auerbach Type FW 250 x 1000 / 2 Year of manufacture: 1989 Table: 1250 x 250 mm Table load capacity: 1250 kg Travel X/Y/Z: 700 / 400 / 500 mm Heidenhain 3-axis digital readout SK 40 Dedpfx Ajz Ixliopbscn Spindle speeds: 55 – 2800 rpm Feeds: 10 – 630 mm/min, stepless Vertical head Horizontal milling device Drive power: 6.3 kW Weight: 2.5 t Offered at EUR 2,000 – plus VAT, ex location

Condition: ready for operation (used), Year of construction: 1970, Immediately available, free of any insolvency claims: Universal milling machine SHW with swivel head, vertical head, and horizontal milling attachment Type UF 1 Year of manufacture 1970 Table 700 x 310 mm Dcedsz Ixlpopfx Apben Travel distances X/Y/Z 550/340/420 mm Spindle taper SK 40 Spindle speeds 46 – 2200 rpm Quill travel 80 mm Ram stroke 200 mm Feeds 12 – 254 mm/min Weight 2 tons SK 40 collets Hydraulic vise Weight 2 tons Price: EUR 1,750.00 plus VAT, ex works.

Condition: new, 1 brand new universal milling head in standard or extended version for retrofitting to conventional, NC, or CNC milling machines or drilling machines of any type, system "HURON", swiveling over 2 levels, every angle adjustable Mounting: ISO 40 Overhang: approx. 360 mm Designed drive power: 10 HP Max. speed: 1,800 rpm Weight in standard version: approx. 82 kg Accessories / Special Features: • Manual tool clamping • The main spindle and all shafts and engagements are made of case-hardened and tempered chrome-nickel steel • 2 axes that can rotate relative to each other, allowing every setting angle! System „HURON“ • Tapered engagements are ground according to the „KLINGELNBERG“ system • The roller bearings of the main spindle consist of tapered high-precision rollers • 1 tool clamping screw Delivery time: approx. 12-14 weeks after order receipt Dsdpfx Apjdbny Eebscn Siegfried Volz Werkzeugmaschinen Rüschebrinkstr. 151-153 DE - 44143 Dortmund - Wambel / Germany

Condition: used, Year of construction: 2017, machine/vehicle number: O3pl, functionality: fully functional, power: 0.75 kW (1.02 HP), input voltage: 230 V, input frequency: 60 Hz, type of input current: AC, rip fence adjustment: manual, actuation type: pneumatic, rotational speed (max.): 12,000 rpm, rotational speed (min.): 12,000 rpm, table width: 330 mm, table length: 2,400 mm, total length: 2,600 mm, total width: 800 mm, total height: 1,800 mm, overall weight: 540 kg, PEMAC 03PL 3-head copy milling machine – Year of manufacture 2017 – Ready for immediate use Very well-maintained PEMAC 03PL copy milling machine for aluminum profiles, manufactured in 2017. The machine has always been used in a commercial setting, has been well-maintained, and is in fully working condition. Inspection and test runs are possible. Dcjdozlar Ujpfx Apbjn Specifications Year of manufacture: 2017 230V (1-phase) 3 milling heads Spindle speed: 12,000 rpm Working pressure: 6–7 bar Weight: approx. 540 kg Included 35 used and new milling cutters Video of the machine in operation available Optionally available: Tekna TK280 punching machine (2012) Compressor Asking price: €6,500. Serious offers will be considered.

Condition: used, Univ. universal tool milling machine DECKEL, Type FP 1 Machine No. 51265, Year of manufacture approx. 1967 Travel distances X: 300 mm, Y: 150 mm, Z: 340 mm Table size 600 x 200 mm Spindle mounting SK 40 - S20 x 2 Dedpfeghtvasx Apbscn Spindle speed 40-2000 rpm, 16 speeds Motor power 1.0 and 1.6 kW, pole-changing Mains connection 380 volts, 50 Hz - Feed in the X and Z axes - Spindle speed via 2 motor speeds and 8 gear stages - Quill movement on the vertical milling head 60 mm - Swivel, rotary, and tilting angle table - Coolant pump in the machine base - Adjacent control cabinet Space required L x W x H 1100 x 1100 x 1600 mm Weight 690 kg Good condition

Condition: ready for operation (used), Kölsch / Beichle Uni1-Uni4 / Universal milling machine - Universal rotary table - Coordinated milling paths X / Y / Z - Suitable for general milling operations and partial and full circular milling - Additional three-jaw chuck Dimensions: L x W x H 1.7 x 1 x 1.9 meters / Weight 950 kg Errors and omissions excepted. Dcodpfx Apsz Eyyijbjn

Condition: used, Year of construction: 1998, travel distance X-axis: 600 mm, travel distance Y-axis: 400 mm, travel distance Z-axis: 430 mm, total height: 2,150 mm, total length: 1,900 mm, total width: 1,400 mm, rotational speed (max.): 2,500 rpm, rotational speed (min.): 50 rpm, type of input current: three-phase, table length: 400 mm, table width: 800 mm, MEXPOL D40A1 Universal Tool Milling Machine with HEIDENHAIN Digital Readout and Counter Support For sale is a robust MEXPOL D40A1 universal tool milling machine, manufactured in 1998. This machine is ideally suited for toolmaking, general mechanical engineering, single-part and small-series production, as well as repair and training workshops. The milling machine is equipped with a HEIDENHAIN ND 780 digital readout, which enables precise and convenient operation. The sturdy cross table with T-slots offers versatile clamping options. In addition, the machine features a coolant system and a counter support for supporting milling arbors during horizontal milling operations. The swiveling milling head expands the range of applications and enables flexible machining of various workpieces. The machine is in a well-maintained, used condition and was in operation until recently. Technical data: Manufacturer: MEXPOL Type: D40A1 Year of manufacture: 1998 Factory number: 50443 Machine type: Universal/Tool Milling Machine Spindle mount: SK 40 Speed range: 50 - 315 + 400 - 2500 rpm (9 steps) Feed rate range: 10 - 63 + 80 - 500 mm/min (9 steps) Travel (X / Y / Z): 600 × 400 × 430 mm Table dimensions: 800 x 400 mm T-slots: 7 pcs, 14 mm wide 3-axis digital readout: HEIDENHAIN ND 780 Coolant system Dcedpfx Apezfxubobsn Counter support Swiveling milling head Equipment: HEIDENHAIN ND 780 3-axis digital readout, swiveling Swiveling control panel Coolant system Hydraulic tool clamping Drilling quill Counter support for milling arbor operation Work light Handwheels for all axes Fold-up, all-around chip guard with gas springs Total weight: approx. 1,500 kg Machine dimensions: approx. 1900 × 1400 × 2150 mm (L x W x H) Subject to prior sale and errors.

Condition: used, cutter head, milling holder, carbide cutter, indexable insert cutter, face milling head, milling head, cutter head shell milling cutter, face milling cutter, corner milling cutter, angle milling cutter, shell angle milling cutter -Cutter head: face milling cutter SK50 -Type: Ø 140 mm -Number of teeth: 12, without indexable inserts -Hole diameter: 40 mm / bolt circle diameter 66 x 14 mm -Dimensions: Ø 173 x 60 mm -Weight: 5.0 kg Dcedpfxjval Rvs Apben

Condition: used, cutter head, milling holder, carbide cutter, indexable insert cutter, face milling head, milling head, cutter head shell milling cutter, face milling cutter, corner milling cutter, angle milling cutter, shell angle milling cutter -Cutter head: face milling cutter SK50 with extension -Type: Ø 140 mm -Recording: SK50 -Dimensions: Ø 140 x 335 mm -Weight: 13.1 kg Dcsdpfju Uwvnjx Apbon

Condition: good (used), Year of construction: 2014, Knuth Sinus 330 x 1500 Knuth Sinus 330 x 1500 lathe, manufactured in 2014, in very good original condition. The machine comes from a special production run by a renowned German machine tool company. CE compliant!! Technical data: Year of manufacture: 2014 Knuth Sinus 330 x 1500 Working area: Workpiece length: 1,500 mm Turning diameter over bed: 660 mm Turning diameter over cross slide: 440 mm Turning diameter without bridge: 900 mm Bridge length: 320 mm Bed width: 400 mm Dcodpfx Apez Irwfebsn Travel distances: Travel X-axis: 368 mm Travel Z1-axis: 230 mm Swivel range of top slide: 45° Main spindle: Spindle speed: 25 rpm - 1,600 rpm Spindle bore: 105 mm Spindle mounting: D1-8 Spindle taper: ø 113 mm / 1:20 Rapid traverse: Rapid traverse X-axis: 2,000 mm/min Rapid traverse Z-axis: 4,000 mm/min Tailstock: Tailstock spindle diameter: 90 mm Tailstock taper: 5 MK Tailstock quill stroke: 235 mm Tailstock cross slide: ± 12.5 mm Drive power: Motor power, main drive: 7.5 kW Dimensions and weights: Dimensions (L x W x H): 3.21 m x 1.23 m x 1.6 m Weight: 2,800 kg About the machine: The Sinus D is the largest series in the universal lathe segment. Conventional lathes like this are characterized by their robust design and high versatility. The design follows a classic design, but is based on a heavy, one-piece cast machine bed. As with heavy-duty lathes, the power transmission between motor and spindle is also achieved here via a manual lamellar clutch. With integrated functions such as the removable bed bridge, rapid traverse, and a taper turning device, this series offers optional solutions for machining long workpieces or large flanges. One-piece heavy cast bed with high stability Massive headstock with large spindle bearings Rapid traverse in 2 axes for fast positioning Taper turning attachment for additional applications Well-designed safety features You can find more lathes from well-known manufacturers on our website.

Condition: good (used), Universal tool milling machine Mikron WF 2 Manufacturer: Mikron Type: WF 2 Machine category: Universal tool milling machine Spindle speeds: 12 Speed range: 50–2240 rpm Spindle speed step: 1.4 Feeds: 18 Feed range: 8–400 mm/min Feed step: 1.25 Rapid traverse rate: 1400 mm/min Milling spindle motor: 2-speed, 1.2/1.8 kW at 1400/2800 rpm Feed motor: 0.55 kW at 1400 rpm Coolant pump motor: 0.1 kW at 2800 rpm Longitudinal travel X: 420 mm Transverse travel Y: 250 mm Vertical travel Z: 335 mm automatic / 340 mm manual Vertical travel with optical measuring system: 300 mm automatic / 310 mm manual Clamping surface of fixed angle table: 250 × 700 mm Machine weight with vertical milling head and angle table: approx. 770 kg Weight with all accessories: approx. 1250 kg Position indicator: digital for X/Y/Z Machine vice: included Dedozw U Nfopfx Apbocn Tool holders and collets: extensive range of accessories available Operating manual: included No guarantee is given for the accuracy, completeness, or up-to-dateness of the information provided.

Condition: used, Univ. universal milling machine DECKEL, Type FP 1 Machine No. 28317, Year of manufacture approx. 1960 Travel distances: X: 245 mm, Y: 150 mm, Z: 340 mm Table size: 600 x 210 mm Spindle mount, horizontal: MK 4 - S20 x 2 Spindle speed, vertical: 95-1900 rpm, 12 steps Spindle speed, horizontal: 60-1200 rpm, 12 steps Motor power: 0.8 and 1.1 kW, pole-changing Power connection: 380 Volt, 50 Hz - Spindle speed controlled via 2 motor speeds and 6 gear stages - Feed in the X and Z axes - Coolant system with mechanical pump in the machine base Djdpfsiy Ekvjx Apbscn - Quill travel on the vertical milling head: 60 mm - Vertical milling head swivels +/- 90° - Metal substructure made of angle iron with machine feet Space requirement L x W x H: 1100 x 900 x 1650 mm Weight: 650 kg Good condition

Condition: used, Univ. universal milling machine DECKEL, Type FP 1 Machine No. 33064, Year of manufacture approx. 1960, overhauled in 2012 Dcsdsdzp T Ejpfx Apbon Travel distances: X: 300 mm, Y: 150 mm, Z: 330 mm Table size: 600 x 210 mm Spindle mount: MK 4 - S20 x 2 Spindle speed, vertical: 95-1900 rpm, 12 steps Spindle speed, horizontal: 60-1200 rpm, 12 steps Motor power: 1.1 and 1.4 kW Power connection: 380 Volts, 50 Hz - Feed in the X and Y axes - Quill movement on the vertical milling head - Fixed angle table - Coolant system with mechanical pump in the machine base - Adjacent control cabinet with cable plug connection Space required L x W x H: 1100 x 900 x 1600 mm Weight: approx. 900 kg Good condition Machine was overhauled in 2012.

Condition: used, Year of construction: 2017, Control DMG MORI SLIMline x-travel 500 mm y-travel 450 mm z-travel 400 mm b-axis -5 / + 110 ° 360 ° table dimensions 630 x 500 mm rapid traverse 30 m/min turning speed range 20 - 12.000 U/min Drive power (40/100%) 13/9 kW tool taper SK 40 number of tool places 30 Pos. Number of working hours ca. 11.605 h spindle hours ca. 4.061 h In our assessment, the machine is in good used condition and can be inspected under power by appointment. Technical features & accessories: - Chip conveyor - Internal coolant supply (ICS) - Coolant spray gun - Electronic handwheel Dodpfxjz I D Ame Apbocn - Direct position measuring system (X, Y, Z) - Renishaw probe kit - Oil and emulsion mist separator Accessories, tools, and workholding devices shown are included in the scope of delivery only if specified in the additional information. Subject to change, errors in technical data and specifications, and prior sale.

Condition: used, Univ. universal tool milling machine DECKEL, type FP 1 Machine no. 52185, year of manufacture 1968 Travel distances: X: 300 mm, Y: 150 mm, Z: 340 mm Table size: 600 x 250 mm Spindle mount: SK 40 - S20 x 2 Spindle speed: 40-2000 rpm, 16 steps Motor power: 1.0 and 1.4 kW, pole-shifting Power connection: 380 volts, 50 Hz - Feed in the X and Z axes - Two motor speeds and 8 gear stages - Quill travel on the vertical milling head: 60 mm - Fixed tilting table Dcodpfx Asdzqb Sspbsn - Coolant system in the machine base - Adjacent control cabinet - Counter holder with counter bearing for horizontal milling, SK 40 Space requirement L x W x H: 1200 x 1100 x 1600 mm Weight: approx. 1000 kg Very good condition

Condition: used, Year of construction: 1987, Universal CNC Milling Machine CNC MAHO MH 400 E Travel X: 400 mm Travel Y: 375 mm Travel Z: 250 mm Numerical Command CNC PHILIPS 432 Table: 700 x 270 mm Cone: SA40 Spindle speed: from 80 to 4000 RPM Year of construction: 1987 Central lubrication Manually swivel head Supplied with doc + machine parameters Dcodpfxszy Rrze Apbjn Voltage: 380 V Width: 2200 mm Depth: 2000 mm Total height: 2000 mm Weight: approx 1,5 T

Condition: used, Univ. Universal milling machine TOS, type FN 32 Year of manufacture: approx. 1980 Travel distances: X: 450 mm, Y: 240 mm, Z: 380 mm Table size: 700 x 300 mm Spindle mount: SK 40 - M16 Spindle speed: 63-2000 rpm, 18 steps Feed rate: 8-400 mm/min, 18 steps Rapid traverse rate: approx. 1400 mm/min Dedpfxjz Ebu Us Apbscn Tailstock travel: 90 mm Main spindle motor power: 2.2 kW Connection power: 400 Volt, 50 Hz - 2-axis digital display Heidenhain, type 731B for the X and Y axes - Vertical milling head with boring quill, swiveling +/- 90° and horizontally extendable - Spindle speed via 18 gear stages - Coolant system in the machine base - Electrical control cabinet on the side of the machine - Fixed angle table - Support for horizontal milling - Keyway broaching attachment, 16 to 105 strokes, stroke up to 70 mm, swiveling +/- 90° - 1 piece tool holder SK 40 with slitting cutter - Control cabinet located beside the machine Space requirement L x W x H: 1500 x 1200 x 1970 mm Weight: 1650 kg Good condition

Condition: good (used), functionality: fully functional, Internal article number: 26092 Original Deckel high-speed milling head SK40 Compatible with Deckel FP1 / FP2 Well-maintained original condition! Dcedpfoz Ha Euox Apbsn This high-speed milling head comes from an educational institution and is in good condition.

Condition: good (used), Year of construction: 1998, Mikron UM 710/900 Universal Milling Machine High-precision universal tool milling machine from the Swiss quality manufacturer MIKRON, model UM 710/900. The machine comes from a well-maintained environment and impresses with the renowned Mikron precision and generous work area (up to 900 mm travel in X). It is ideally suited for toolmaking, prototype construction, training, or demanding repair workshops. Technical data at a glance (manufacturer's specifications): Work area & axes: Longitudinal travel (X-axis): 710 / 900 mm Transverse travel (Y-axis): 630 mm Dcjdpfjzcqcgjx Apbjn Vertical travel (Z-axis): 500 mm Spindle: Tool holder: SK 40 / DIN 69871 Gear stages: 4 Speed range: adjustable (vertical & horizontal) Main drive & feed: Spindle drive power: 11 kW (at 44% duty cycle) / 7.5 kW (at 100% duty cycle) Feed rate (X, Y): 0 – 10,000 mm/min (programmable) Feed rate (Z): 0 – 8,000 mm/min (programmable) Rapid traverse (X, Y / Z): 10 m/min / 8 m/min Work table (rotary table): Clamping surface: 600 x 1,200 mm T-slots: 9 pieces (14-H7, spacing 63 mm) Max. table load: 500 kg Electrical system, dimensions & weights: Connected power: Total installed rated power 21.5 kW Operating voltage: 3 x 400 V - 50 Hz Coolant system: 150 liter capacity Machine weight: approx. 4,300 kg (incl. safety cabin) Product video “Everything from a single source: We will gladly offer you suitable bank financing for your project.” More items – new and used – can be found in our shop! International shipping costs available upon request!

Condition: used, CNC Universal Coordinate Drilling and Milling Machine FEHLMANN Type PICOMAX 100-CNC 3 CNC Control HEIDENHAIN TNC 155 Manufacturer's No. 16186651 Year of Manufacture 1986 Spindle Taper FEHLMANN SF32 Drilling Capacity Ø 30 mm in steel Thread Cutting up to M20 in steel Travel X: 850 mm, Y: 435 mm Quill Stroke Z: 210 mm Vertical Movement of Milling Head 580 mm Feed X and Y 1 to 8000 mm/min. Feed Z 1 to 4000 mm/min. Rapid Traverse X and Y 8 m/min. Rapid Traverse Z 4 m/min. Table Clamping Surface 1570 x 500 mm Distance Spindle Nose - Table 130 - 720 mm Overhang Spindle - Column 450 mm Spindle Speed 50 - 7100 RPM, stepless Spindle Drive 10 kW Total Connected Load 20 kW Mains Connection 400 Volt, 50 Hz - CNC Control HEIDENHAIN TNC 155 with TFT monitor - 3 axes controlled, X, Y and Z quill adjustment - hydro-mechanical tool clamping FEHLMANN SF32 - threading device - cable remote control for machine operation and axis movements - motorized vertical movement of the milling head with shutdown via adjustable cams Dcedpfxehik Ezo Apbon - 3D probe RENISHAW, Type MP 11F with FEHLMANN SF32 mount - 20 tool holders FEHLMANN SF32 - swiveling tool holder with 21 tool positions - coolant system in the machine frame - control cabinet fixed to the machine - documentation: operating manual, control manual and electrical diagrams Space Required L x W x H 2350 x 2000 x 2300 mm Weight 3.2 tons very good condition

Condition: used, Year of construction: 1992, functionality: unexamined, machine/vehicle number: FBZ-8732, travel distance X-axis: 2,500 mm, type of input current: three-phase, input voltage: 380 V, CNC bed-type milling machine Anayak FBZ-HV-2500 with a swiveling universal milling head, year of manufacture 1992, Fidia control system. Serial no. FBZ-8732, connection 380 V, 50 Hz, 60 A, 40 kW. Longitudinal travel X 2,500 mm, bed-type table with continuous T-slots. Equipment: Irudex chip conveyor with chip collection cart, hydraulic unit with hydraulic ring for hydraulic tool release, control panel with keyboard, safety guard with viewing window. Location: Homburg (Saar), Germany. Inspection by appointment. Price on request, net plus VAT, ex works; dismantling and loading by arrangement. All information without guarantee. Dcsdpfxez A Uitj Apbsn