Used Jago Hole Line Boring Machine for sale (69,972)

Condition: excellent (used), Year of construction: 2010, functionality: fully functional, IMSA DRILLING MACHINE Model MF1100BBLL 6P Chsdpoz An Tnsfx Afgec Year 2010 Control unit: SELCA 4045 X-axis travel: 2200 Y-axis travel: 1000 Table length: 1000 Table width: 1200 Maximum workpiece size (length x width x height): D.2100 x H.1300 Table surface: Tapped holes Maximum workpiece weight: 10000 Spindle speed: 4000 Spindle connection: ISO 40 Torque (continuous / 10 min): 1200 Nm Number of tools: 108 6-position pallet changer MACHINE EQUIPPED WITH A LANCE CHANGER AND TOOL CHANGER FOR MILLING HEAD MACHINE IN EXCELLENT CONDITION AVAILABLE FOR INSPECTION WHILE IN OPERATION

Condition: used, Horizontal Boring Machine CORNAC C100 Travel X: 1000 mm Travel Y: 1000 mm Travel Z: 1260 mm Fixed table Cone: SA 50 Chedpfjz Hv Hhjx Afgjc Spindle: Ø 100 mm Spindle exit: 550 mm Rotation: from 10 to 1250 RPM Table size: 1550 x 980 mm Surfacing plate: Ø 520 mm Spindle motor: 9,5 kW Scale 3 axes HEIDENHAIN Automatic Feeds: X - Y - Z Supplied with a set of cones Voltage: 380 V Dimensions (L x W x H): 4500 x 2100 x 2450 mm Weight: approx 8 T

Condition: used, Technical details: x-Travel: 530 mm table cross travel (Y-axis): 5200 mm w-axis: - mm drilling depth in one stroke: ca. 4000 mm metrical thread cutting: 0,25 -560 M total power requirement: 35 kW bed width: 560 mm centre distance: 5700 mm centre height: 500 mm swing diameter over bed: 1000 mm turning diameter over support: 800 mm range of feed in x - axis: 0,0063 - 4,0 mm/U range of feed in y - axis: 0,0063 - 4,0 mm/U spindle bore: 135 mm range drill spindle revolution per minute: max.1400 U/min range drill spindle revolution per minute: min. 7,1 U/min speed steps work spindle: 24 steps tailstock taper MT: MK 6 tailstock quill stroke: 300 mm dimension machine approx.LxWxH: 12,0 x 2,5 x 2,0 m The machine was retrofitted/overhauled in 2007. Special-purpose machine suitable for deep-hole drilling and/or heavy-duty turning operations. Chedpozxlv Ejfx Afgec Inch thread range: 1/16 – 80 TPI 3-jaw chuck, chuck diameter: Ø 315 mm 2 steady rests Faceplate: Ø 800 mm without jaws PARAT quick-change tool holder, Type 4 3 pices Coolant system HEIDENHAIN PT 880 4-axis DRO Boring bar for deep-hole drilling Drilling head for deep-hole drilling Infinitely variable boring-bar feed Various accessories *

Condition: used, functionality: fully functional, Year of construction: 1989, For sale: TRUMPF MINIMATIC 100 punching machine. Lightly used, in excellent condition, and comes with many tools. The machine is connected and can be tested. We can provide training on how to use the machine; all instructions are available. Csdpfxoy Udrmo Afgshc Specifications: Make: TRUMPF MINIMATIC 100 Made in: Germany Year: 1989 Capacity: 15 T / 150 kN Other: Automatic 9-tool changer Weight: 5T If you have any further questions, please do not hesitate to ask.

Condition: excellent (used), Year of construction: 2018, functionality: fully functional, drilling depth: 1,600 mm, feed length X-axis: 3,000 mm, feed length Y-axis: 2,100 mm, feed length Z-axis: 1,500 mm, overall weight: 50,000 kg, feed rate X-axis: 10,000 m/min, feed rate Y-axis: 10,000 m/min, feed rate Z-axis: 10,000 m/min, spindle speed (max.): 4,500 rpm, drill diameter: 40 mm, table length: 2,100 mm, table width: 1,900 mm, CNC Heidenhain iTNC 640 AXES OF MOVEMENT Maximum drilling depth in a single operation (V axis): mm 1,600 Table travel, horizontal movement (X axis): mm 3,000 Vertical movement (Y axis): mm 2,100 Column approach movement (milling) (Z axis): mm 1,500 Drilling slide tilting (resolution 0.001°) (A axis): +30° / -15° Table rotation (resolution 0.001°) (B axis): 360° Max axis feed rate: mm/min 10,000 DEEP HOLE DRILLING AND MILLING SPINDLE – ISO 50 Solid drilling capacity: mm 5 – 25 Maximum drilling diameter: mm 40 Adjustable spindle speed: rpm 1 – 4,500 Spindle power S1: kW 17 Spindle torque: Nm 324 Standard drilling tool holder: mm Ø 25 x 70 Maximum internal spindle pressure: bar 120 Taper type: ISO 50 DIN 69871/A Coolant system: Yes ROTARY TABLE Rotary table dimensions: mm 1,900 x 2,100 Table rotation (resolution 0.001°) (B axis): 360° Table load capacity in rotation: kg 20,000 T-slots: mm 22 OIL SYSTEM Hydraulic pump motor power: kW 4 – 7.5 Self-regulated oil pressure: bar 15 – 120 Self-regulated oil flow rate: l/min 5 – 80 Oil tank capacity: L 800 – 1,000 Cooled oil temperature: 25 – 32 °C Filtration grade: micron 16 MACHINE DIMENSIONS AND WEIGHT Width x Length x Height: mm 7,000 x 7,900 x4,700h Codpfx Ajywnr Njfgehc Machine weight: kg 50,000 DRILLING CAPABILITIES WITH GUN DRILLS Maximum depth: mm 1,600 Maximum rotation speed: rpm 4,500 Minimum drilling diameter: mm 6 Maximum drilling diameter: mm 40 THREADING HEAD “IMSASISTEM” WORKING FEATURES Max rotation speed: rpm 4,500 Maximum threading on C40 steel: M36 Machine equipped with: • Remote electronic handwheel Heidenhain • ISO 50 tool changer magazine with 40 positions • Fume extraction system 4,000 m³/hour • Through-spindle air/oil system • M24 threads on table side • Various tools and equipment • Tool rack with assorted gun drills • User and maintenance manual and CE declaration of conformity

Condition: used, Machine type: Horizontal table-type boring machine Manufacturer: CORNAO Model: BS65N S1893 Year of manufacture: 1983 Condition: Used Motor power: 6.5 kW Voltage: 400 V Chsdpfoui H U Njx Afgoc Required air pressure: 5 bar Weight: 1,900 kg Control system: A.I.F

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 Chodpfx Ajzw U Nfefgoc 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 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, Radial drilling machine WEBO Type R4bR Serial No. 15 / E195 Year of manufacture: approx. 1965 Drilling capacity: 50 mm Spindle taper: MT 5 Maximum spindle outreach: approx. 1250 mm (to column) Clamping surface: 1400 x 1000 mm Column diameter: 315 mm Spindle speed: 30 - 1325 rpm, 9 steps Chodpfou T Ty Hex Afgoc Feed: 0.12 - 2 mm/rev, 9 steps Electrical connection: 380 Volt, 50 Hz - Spindle speed in 9 steps - Motorized height adjustment of the boom Required floor space for operation (L x W x H): 220 x 100 x 285 cm Transport dimensions (L x W x H): 220 x 100 x 260 cm (without motor for height adjustment) Weight: approx. 2.8 t.

Condition: good (used), Year of construction: 2007, functionality: fully functional, drilling depth: 1,150 mm, overall weight: 12,000 kg, drill diameter: 32 mm, Heidenhain iTNC530 cnc control 12-fold tool changer Technische Daten / technical details: Wege: / travels: X-Achse längs (Tisch) / X-axis longitudinal (table) 1800 mm Z-Achse quer (Ständer) / Z-axis cross (column) 1700 mm W-Achse quer (Bohreinheit) / W-axis cross (drilling unit) 1150 mm Y-Achse senkrecht (Bohreinheit) / Y-axis vertical (drilling unit) 1200 mm B-Achse (Rundtisch) / B-axis (rotary table) 360 ° A-Achse (Bohreinheit) / A-axis (drilling unit) -25 - +15 ° Bohrbereich-Tiefbohren (ELB): / drilling area-deep drilling (ELB): Durchmesserbereich / diameter range 6-32 mm max. mögliche Bohrtiefe / max. drilling depth 1150 mm Antriebsleistung / drive capacity 40 kW Gewicht der Maschine ca. / weight ca. 12000 kg Technische Daten, Zubehör und Beschreibung der Maschine sind unverbindlich - Technical data, accessories and description of the machine are not binding. Chedpfx Afjwcldajgoc For more technical details please look at the photos

Condition: reconditioned (used), Year of construction: 1990, Motors 2x1.85A 50Hz 380V 2800 rpm Air operating pressure 6 bar 30 spindles D=10 mm mount Combination foot switch Emergency stop switch Codpfxjv Nptmo Afgehc Main switch Manual height adjustment Manual side adjustment

Condition: good (used), Year of construction: 1990, type of input current: three-phase, Film wrapping machine + shrink tunnel KUPER DUPLEX 2100/650 + KUPER ST/I-1400 Film wrapping machine Manufacturer: Kuper Type: DUPLEX 2100/650 Year of manufacture: 1995 Film roll width at the top: 2000 mm Film roll width at the bottom: 2000 mm Packaged goods height (passage height): 650 mm Film roll diameter: 400 mm Compressed air: min 5 bar Compressed air consumption (per cycle): approx. 16 L swing arm with chain lift Cedpokn Rz Hofx Afgshc seal bar length 2100 mm "Siemens" control panel overall dimensions: 3000x2000x2300 mm Shrink tunnel: Manufacturer: Kuper ST/I-1400 year of manufacture: ca 1988 max capacity: width: 1350mm height: 650mm work length: 3000mm 2 pcs centrifugal fan blow-off units heating power: 59 kW temperature range 230 °C endless conveyor belt throughput speed 5 m/min Length: 3500 mm Width: 2350 mm Height: 1850 mm

Condition: used, Year of construction: 2019, - Magazine loading system - Clamping table for frame parts - 3 horizontal, longitudinal drilling units from the rear - 4 vertical drilling units from above 1 Drilling machine Manufacturer: KOCH Type: BL 2500 NC select line - used - Year of manufacture: 2019 Workpiece dimensions Workpiece length 150 - 2500 mm Workpiece width 20 - 300 mm Workpiece thickness 10 - 50 mm Material: Solid wood Magazine loading system 1 with workpiece return. Workpiece insertion via 2 parallel-controlled servomotors. The number of workpieces in the magazine depends on the workpiece weight. Manual workpiece insertion Clamping table for frame parts 1 By inserting 3 support segments into the longitudinal drilling units, workpieces can be inserted manually and clamped with clamping cylinders and templates. This also allows for special workpiece dimensions. Work cycle triggering via 2 manual controls on the swappable control panel. 3 horizontal, longitudinal drilling units from the rear Construction width 160 mm Drilling motor 2 kW Longitudinal adjustment (X) with LCD display Vertical adjustment (Z) With dust extraction 4 vertical drilling units from above (supported on one side in a linear guide) Adjustable over the entire working width (X), reading LCD display. Adjustable in working depth (Y), reading LCD display One vertical clamping cylinder mounted directly on the unit Counterpieces for through-holes are available as an option. Drilling motor 1.5 kW at 50 Hz Drilling stroke 50 mm Speed 2,800 rpm Total drill length 70 mm With 4 rotary indexing heads with quick adjustment (for vertical drilling units) with fixed stops at 0 and 90 degrees Positioning control KOCH NUMERIC Basic 1 Positioning control with Beckhoff C6920 industrial PC Intel Celeron 2.2GHz CPU 2.5 320GB HDD 1x RS232, 2x USB, 1x Ethernet available 15-inch touch panel Operating system Windows 7: English User interface in English Input of all machine commands via the touch panel Software is prepared for an online connection. The configuration of the online connection (network) and commissioning are carried out by the customer or their software company. USB port on the PC 4 x Dynamic NC axis (with bearing control) for Z axes Connection data 1 Electrical connection 400 V, 50 Hz, 3 phases Voltage fluctuations max. + 6 % to - 10 % If protected by an RCD (residual current device) on the customer's side, an all-current sensitive (R CCB, Type B) RCD with a rated residual current of /= 300 mA must be used. Chodpfozuynhox Afgsc Air connection 7 bar Dust extraction air velocity min. 30 m/s Note: The technical data and descriptions are a transcript of the original order confirmation. The data is for informational purposes only and is not binding.

Condition: used, Year of construction: 1979, functionality: fully functional, machine/vehicle number: Ob 21882, spindle speed (max.): 700 rpm, feed length X-axis: 15,000 mm, feed length Y-axis: 5,150 mm, feed length Z-axis: 1,600 mm, total width: 6,400 mm, total length: 19,300 mm, total height: 10,370 mm, feed length W-axis: 2,000 mm, spindle diameter: 250 mm, table height: 400 mm, table length: 8,000 mm, table width: 5,665 mm, overall weight: 137,000 kg, year of last overhaul: 2006, grinding spindle motor power: 83,000 W, type of input current: three-phase, We offer for sale a Škoda W250H floor boring machine. This machine is designed for machining heavy and large-sized components for the energy, shipbuilding, metallurgical, mining, and machine production industries. The machine is equipped with a Siemens Sinumerik 840D control system, enabling the execution of demanding boring, drilling, and milling operations. Complete technical documentation is available. Upon request, we can provide additional photos, videos, and information regarding the machine's equipment and technical condition. Chjdszrwq Iopfx Afgec Standard equipment: Tool and measuring instrument storage rack, mounted on the spindle box. Optional equipment: Cooling system with coolant Rotary table 4000x3550 3 x angular heads

Condition: used, Year of construction: 1987, Technical details: spindle diameter: 110 mm x-travel: 1985 mm y-travel: Spindelstock vert. 1270 mm z-travel: Tisch längs: 1260 m. Setzstock/1490 m. Setzstock mm table adjustment: nein ° B-axis (table): 360 W-axis (spindle longitudinal): axial: 710 mm U-axis: Planschieber radial: 250 mm control for program: Heidenhain 320 tool taper: ISO 50 table-size: 1600 x 1400 mm table rotating: 360 ° table load: 6,3 t range drill spindle revolution per minute: 6,3 ... 1250 / 4 step U/min Csdpeu Utwbefx Afgshc revolution per minute: Plansupport: 6,3 ... 315 / 2 step U/min feed steps: Tisch: 5...2500 und Spindelstock vert. 5...2500 mm/min total power requirement: ca. 90 kW weight of the machine ca.: 30 t Tailstock Facing slide 700 Electronic handwheel max. turning Ø for drilling: 630mm max. turning Ø for facing: 1250mm At the moment the Horizontal Boring and Milling Machine has an electrical fault in the control (unknown). Our offer/sale is as described and as is! *

Condition: good (used), Year of construction: 2004, Deep-hole drilling machine TBT Varioflex MD 30-1, serial no. 106254-11, year of manufacture 2004, 70 kW, SIEMENS 840D control system, tool changer, chip conveyor, paper band filter system, with a comprehensive set of drilling tools, drilling slide stroke 2,200 mm, drilling depth 1,500 mm, weight approx. 15,000 kg. Chjdez Iccfepfx Afgoc

Condition: used, Year of construction: 1979, We are offering this used Schneider SL 1 long-hole drilling machine, model SL 1 7429, manufactured in 1979, for sale. Manufacturer: Schneider Model: SL 1 Machine No.: 7429 Year of Manufacture: 11/79 The advertised price is €1,400 net (negotiable). Cedpjz Afd Dofx Afgehc If you have any questions or require further information, please feel free to send us a message or call us.

Condition: good (used), travel distance X-axis: 350 mm, travel distance Y-axis: 250 mm, travel distance Z-axis: 350 mm, workpiece weight (max.): 200 kg, table width: 300 mm, overall weight: 800 kg, type of input current: three-phase, table length: 600 mm, workpiece length (max.): 400 mm, Fast-Hole EDM Brand: Tecnosystem Model: D3-DM Csdpfx Aoz Dt Ukjfgjhc FAGOR 3-Axis NV 300E Coordinate Display Travel: - X-axis: 350mm - Y-axis: 250mm - Z-axis: 350mm Electrode rotation speed: 200 rpm Head travel: 200mm Table dimensions: 600x300mm Maximum workpiece weight: 200kg Dielectric fluid capacity: 200L Drilling capacity: Drill/electrode diameters from 0.3mm to 6.3mm. Maximum electrode length: 400mm Weight: 800kg The Tecnosystem D3-CM is a fast-hole EDM machine (or EDM drilling machine/super-drilling machine). In machining workshops, it is commonly used as auxiliary equipment for wire cutting to create the initial holes through which the cutting wire is subsequently passed. Function: Fast drilling using an electric arc on conductive materials (hardened steels, etc.) using rotating tubular electrodes made of brass or copper. Key applications: Drilling threading holes for EDM wire, extracting broken taps, and creating small cooling or ejection holes in molds and dies. System: High-pressure injection of dielectric fluid through the tubular electrode.

Condition: new, functionality: fully functional, drilling depth: 55 mm, rotational speed (min.): 2,800 rpm, power: 3 kW (4.08 HP), table height: 875 mm, type of input current: three-phase, input voltage: 400 V, input frequency: 50 Hz, High productivity for drilling furniture sides The MAGGI Boring System 46 is a semi-automatic multi-spindle drilling machine, equipped with two parallel vertical heads, each with 23 drilling spindles. It is the ideal solution for furniture manufacturers who frequently drill holes in the sides of cabinets, bookshelves, wardrobes, or shelving units. Thanks to the two drilling heads, the machine drills two parallel rows of holes in a single work cycle, significantly reducing production time compared to a machine with a single head. Manufacturer MAGGI – Italy Number of spindles 46 pieces Spindles left - right 11 left, 12 right Distance between spindles 32 mm Distance between outer spindles 145 – 625 mm Distance front unit-fence 15 – 494 mm Distance rear unit-fence 160 – 639 mm Maximum vertical drilling depth 55 mm Maximum drilling tool diameter (Ø) 40 mm Drill shank diameter (Ø) 10 mm Chedpfx Aozp H Nzofgjc Hydraulic piston stroke 70 mm Maximum panel thickness 50 mm Maximum workpiece size 3000 x 700 mm Table height from the ground 875 mm Workpiece clamping pistons 6 pieces Number of motors 2 pieces Motor power 2 HP/ 1.5 kW Motor speed 2800 rpm Required air pressure 6-8 bar Air consumption 20 l/cycle Exhaust hood diameter (Ø) 80 mm Overall dimensions 1206 x 1180 x 1163 mm Net weight 366 kg Supply voltage 400 V – 3 Phase – 50 HZ

Condition: like new (used), Year of construction: 2018, functionality: fully functional, travel distance X-axis: 500 mm, travel distance Y-axis: 400 mm, travel distance Z-axis: 400 mm, total height: 1,800 mm, total length: 1,500 mm, total width: 1,700 mm, overall weight: 1,550 kg, The machine comes from a training workshop and has hardly ever been used. Condition: Like new. Chodpfx Afjzq Hzyegjc

Condition: good (used), Year of construction: 2001, Quickwood Rustication / Brushing Line on 03 sides with 02 brushes per side Codpfx Ajvy Eu Isfgohc

Condition: used, Year of construction: 2006, Solid drill diameter / mm bore depth / mm number of spindles / 2-machine package: Froriep deep hole drilling machine & Irle finishing machine Perfectly matched duo for deep hole drilling and precise finishing of large workpieces A specialised machine package is available for sale – two perfectly matched systems for the complete machining of long, heavy workpieces with the highest demands on precision and efficiency. MACHINE 1 Froriep CNC deep hole drilling machine – the prefabrication specialist Year of manufacture: 2006 Control system: Siemens Sinumerik 840D Max. drilling depth: 8,850 mm Workpiece diameter: 150 – 900 mm Speed range: 1 – 300 rpm Feed rate: 0.5 – 4,500 mm/min Drive power: 129 kW Swing diameter over bed: 1,000 mm Clamping diameter faceplate: 900 mm Weight: approx. 47,000 kg Ideal for precise pre-drilling of deep holes – including faceplate, steering ring MACHINE 2 Irle machine – high-precision finishing Power: 129 kW Control: Siemens NC control Speed range: 2 – 300 rpm (stepless) Feed: 3 – 4,500 mm/min (in steps) Centre distance: 11,000 mm Swing diameter over bed: 1,250 mm Clamping range of steady rests: 150 – 1,100 mm Workpiece length: up to 11,000 mm Workpiece weight: up to 10 tonnes Max. outer diameter: 850 mm With up to 50,000 Nm torque, perfect for smooth drilling, honing and demanding finishing processes. Chodpfx Aouddimsfgec Your advantages at a glance - Complete solution from a single source – from pre-drilling to finishing - Large workpieces up to 11 metres and 10 tonnes in weight - High process reliability thanks to perfect machine synchronisation - Ready for immediate use, well maintained and from ongoing operation - Ideal for mechanical engineering, energy, oil & gas, hydraulics and large parts manufacturing

Condition: good (used), Bacciottini Pit Stop DG LINE 8000 Automatic Creasing Machine Fully operational and ready to use. This is the most efficient creasing and perforating system on the market, featuring a robust design. Made in Italy. Non-stop vacuum feeding with the ability to add material during operation. Built-in compressor. The set includes creasing and perforating tools. Technical data: Maximum sheet size: 500 x 700 mm Min. sheet size: 80 x 100 mm Maximum speed (for A4 format): 8000 sheets/h Material weight: 80-400 GSM Maximum number of creases per sheet: 20 Gap distance: 0.1 mm Setting accuracy: 0.1 mm Power supply: 230 V Power consumption: 2 kW Weight: 180 kg Dimensions: 1500 x 750 x 1200 mm Chedpfx Afjzt H Rasgoc

Year of construction: 1987, condition: ready for operation (used), A complete Wagner WBX 1003 boring mill is available. Control: CNC Systems WB 1000, documentation is available. Codpfxettv Uaj Afgshc

Condition: good (used), Year of construction: 2013, Ref. -No.: 10636 Manufacturer: TOS VARNSDORF Type: WHN 13 CNC Year of construction: 2013 Type of control: CNC-Steuerung Control: Heidenhain 530 Storage location: Halberstadt Country of origin: Czech Republic X-Travel: 3500 mm Y-Travel: 2000 mm Z-Travel: 1250 mm W-Axis: 800 mm B-Axis: 360 ° Table Load: 15.000 kg Tool Taper: SK 50 Turning Speeds: 1400 RPM Spindle Speed: 2000 RPM Table size: 1800 x 2200 mm Further information: - The control system was converted to a HEIDENHAIN 530i in 2013. - All drives were upgraded to digital. Thrust bearing replacement on the tower also renewed in 2013. - Accessories: - 3D probe - Heidenhain, large spindle support Cedjzc D E Iopfx Afgehc - 1x Heidenhain axis module (completely overhauled), - 1 new axis module is installed in the machine. - Newly packaged spare parts, covers from the machine. - All bearings have been replaced on the machine in recent years. - Tools and milling cutter heads are available. The machine is first-hand. The machine is still powered up and in production. The machine can be viewed by appointment.

Condition: good (used), Jig boring mill, fine boring mill, plate boring mill, table boring mill, boring mill, milling machine, -Table dimensions: 700 x 405 mm -Travel paths: Z 330 mm/Y 410 mm/X 630 mm -Quick stroke: 155 mm -Recording: MK4 -Speeds: 31 - 1500 rpm -Dimensions: 1570/1800/H2600 mm -Weight: 2600 kg Csdpfx Aod Tk Stsfgehc