Used Ssb Ds-Ss6063 for sale (2,470)

Year of construction: 2012, condition: excellent (used), Used modern, very clean & fully serviced Bystronic Xact 160 3metre x 160ton cnc pressbrake for sale: Model: Xact 160 Make: Bystronic Xact Smart 160 Year 2012 Cybelec 880S cnc control Itsdpfx Aon E Tryjh Dok Working length mm: 3100mm / 3metre Max. press force kN: 1600 / 160ton 2 axis back gauge – R and X axis 4 axis in total Max.stroke mm: 200 Rapid approach mm/s: 100 Working speed mm/s: 1-10 Return speed mm/s:95 With crowning Weight kg 9800 Machine will come with tooling

Condition: used, Year of construction: 2019, pressure 60.0 t chamfer lenght 1270 mm distance between columns 1000 mm column arm 410 mm ram stroke speed 160 mm/sec work speed 10.0 mm/sec return speed 165 mm/sec work stroke 275 mm dayligth 530 mm table height 900 mm table width 90.0 mm back stop - adjustable 500 mm control DA 66T oil volume 150 ltr. voltage 380 V engine output 7.5 kW Weight 4320 kg range L-W-H 2250 x 1960 x 2750 mm current new price approx. 65.000 euros very rarely used! Special price on request - in checked condition - machine video - ?v=KRifrqTgkVU ----- SPEED BEND PRO CNC press brake: * increased installation height * increased cylinder stroke * and increased bending beam speeds ----- Equipment: - CNC electro-hydraulic press brake - DELEM CNC control model "DA-66T" graphics/touchscreen * 2D graphic touchscreen programming mode * 3D representation in simulation and production * 17" color TFT screen with high resolution * Bending sequence calculation * Product programming and representation in actual size * USB interface - CNC controlled axes: Y1 - Y2 - X - R - CNC electro-motorized back stop (X axis) * on ball screws * Travel path .. 500 mm * Travel speed .. 500 mm/s * with 2x manually adjustable stop fingers - CNC electro-motor height adjustment (R axis) * Travel path .. 250 mm * Travel speed .. 350 mm/s - AMADA/PROMECAM upper tool holder * including clamping jaws with upper wedge camber * 1x ROLLERI split set 60° upper tool - AMADA/PROMECAM lower tool holder * including 1x die shoe "C 1050-R" * 1x AMADA 1-V die 85° - Safety device at the rear (door including safety switch) - BOSCH/HOERBIGER hydraulic components - SIEMENS electrical components - FIESSLER AKAS laser protection device in front of the machine - 2x front support arms with SLIDING system (HIWIN plain bearings) Isdszlulpepfx Ah Detk - 1x freely movable double foot control - CE mark / Declaration of conformity - Operating instructions including circuit and hydraulic diagram

Condition: used, Year of construction: 2004, functionality: fully functional, machine/vehicle number: 22000157, overall weight: 63 kg, Description For machining PVC and aluminium profiles, particularly suitable for the production of window and door frames Type: Stationary screwdriver / screw feeding unit Itedpjxxy R Dsfx Ah Dsk Application area: Reinforcement screwdriving in plastic profiles Year of manufacture: 04/2004 Functions: Automatic screw feeding Feeding unit with automatic depth stop Foot switch activation for ergonomic operation Integrated pneumatic control for compact design Stainless steel hopper for long service life

Condition: used, Double Bench Grinder REMA DS 04/150 Rotation: 2900 RPM Grinding wheel: Ø 150 x 25 mm Motor power: 0,3 kW Voltage: 380 V Width: 450 mm Itsdpfx Ahjzmwmfj Dok Depth: 300 mm Total height: 1100 mm Weight: env. 50 KG

Condition: ready for operation (used), Year of construction: 1995, operating hours: 39,000 h, functionality: fully functional, Equipment: documentation/manual, A used and functional profile line for rigid PVC-profiles (300 x 100 mm), consisting of: Twin-screw extruder (parallel) Manufacturer: WEBER Type: DS 7.22 Itjdpfx Asyx Dwkoh Djk Year of manufacture: 1995 Machine no.: DS70-043 Operating hours: 39,000 hours Screw diameter: 70 mm Effective screw length: 22 x D Screw geometry: for rigid PVC profiles Torque: 4,500 Nm per screw Screw speed: max. 40 rpm, continuously adjustable Drive motor: DC low-voltage motor, thyristor-controlled Drive power: approx. 25 kW Cylinder heating/cooling zones: 5/3 (air cooling with fan) Adapter heating zone: 1 Tool heating zones: 5 Control: conventional control with digital temperature controllers Degassing: Busch rotary vane vacuum pump (1.5 kW) Output capacity, max.: 120-150 kg/h for hard PVC, depending on material Connected load: approx. 50 kW (without tool) Special accessories: Mass temperature sensor and mass pressure sensor Adapter between extruder connection and extrusion tool Used tool set for a window profile (widening), consisting of: - Extrusion tool ‘widening’, incl. heating bands - Dry calibration - Vacuum tank approx. 2 m long, with 8 slots for calibration discs - 16 calibration discs Vacuum calibration unit Manufacturer: Uniplast / Greiner Type: CAL VAK 4P Year of manufacture: 1992 Machine number: K9209590 Total length: 6500 mm Vacuum pumps: 4 x Speck vacuum pumps (4.3 kW each) Water circulation pumps: 2 x Calpeda (1.1 kW each) Caterpillar haul-off, incl. attached saw Manufacturer: Uniplast / Greiner Type: CAT PUL 2D Year of manufacture: 1992 Machine number: R 9204546 Haul-off: Effective contact length: 2000 mm Pad width: 250 mm Haul-off force, max.: approx. 25000 N Speed range: approx. max. 10 m/min. Profile saw: HM circular saw blade: Ø 450 mm Profile cross-section, max.: approx. 300 x 100 mm Tilting table Manufacturer: Ide Type: ME N 52/2 Year of manufacture: 1994 Length: 6000 mm Support width: 270 mm Note: The complet profile line was overhauled in 2020 and has only been in operation for 325 hours since then.

Condition: used, Bench Grinder REMA DS 12/200 - 1 grind Rotation: 2900 RPM Grinding wheel: Ø 200 mm x 30 mm Motor: 0,9 kW Voltage: 380 V Width: 600 mm Depth: 400 mm Total height: 1100 mm Weight: approx 80 KG Itodpfxozmwl Io Ah Dek

Condition: ready for operation (used), Year of construction: 2021, operating hours: 2,500 h, functionality: fully functional, machine/vehicle number: E1361000, overall weight: 600 kg, load capacity: 8 kg, arm reach: 2,028 mm, pivoting range: 360 °, controller manufacturer: Fanuc, controller model: R-30iB Plus, teach pendant manufacturer: Fanuc, teach pendant model: Fanuc A05B-2256-C101#EGN, control cabinet width: 600 mm, control cabinet height: 600 mm, input voltage: 400 V, input current: 32 A, type of input current: three-phase, welding current (max.): 400 A, Equipment: documentation/manual, Fully functional and in excellent condition robot welding cell. Fanuc arm and 2-axis positioner, Fronius powersource, wire feeding and push-pull torch. FANUC ARC Mate AM-100iC/8L robot R-30iB Plus controller FANUC 2-axis postitioner A05B-1220-J201-N, payload 500kg Fronius TPS 400i powersource with PMC package Thielmanni nozzle cleaner Itjdpfx Ahszu Irnj Dok SICK curtains Installed 2021 Robot station is fully operational, in good condition and can be seen in use.

Condition: used, functionality: fully functional, Year of construction: 2011, operating hours: 23,000 h, load capacity: 9,000 kg, lifting height: 15,500 mm, fuel type: diesel, mast type: duplex, power: 179 kW (243.37 HP), total length: 6,700 mm, drive type: Diesel, construction width: 4,150 mm, Empty container handler Load centre: 1220 Itedszu T Riepfx Ah Djk Mast type: Duplex Transmission: ZF WG210 Condition: Ready for operation and fully functional Technical condition: Normal Elme 594 ND double stacking 20-40ft side spreader Stacking height 6+1 96

Condition: excellent (used), Year of construction: 2020, functionality: fully functional, Complete sawmill for pallet lumber production, consisting of: Individual sale of machine packages is also possible. 1. Log yard Häwa, with root reducer and Valon Kone debarker VK 90. Calibrated factory inlet measurement system, manufacturer Jörg. Sorting with 28 bins. Log length 2.0 - 5.0 m. Log diameter 20 - 90 cm. 2. Sawmill: Möhringer band saw, running band saw with Flexi Drive carriage. Splinter detection device. Log feeding with stepped singulation. Laser measurement system Bidac. Kallfass model trimming. Resawing: EWD Optimes with chipper PF 19 and double-blade saw NKU. Brodbaek edger. Stacking system for main product, empty pallet handling for main and side products. Kuka robot for packing side products and main products, four dimensions possible. Complete mechanization, electrical and electronic control cabinets, etc. Disposal. Itsdpox T Azwefx Ah Djk Detailed plans or a video can be sent upon request.

Condition: good (used), Year of construction: 2000, Morgan Rushworth NC Downstroking Pressbrake – Year 2000 120 tonnes x 4000 mm. NC Backguage. Safety Guards. Top and Bottom Tooling and Toolholders. Iedpfjxau Eljx Ah Detk

Condition: used, functionality: unexamined, Pair of screws for extruder Weber DS-63, parallel Manufacturer: Hans Weber Maschinenfabrik GmbH Type: DS 63 Itedezrt Enepfx Ah Djk Serial no.: 063.008271.r.1004 Screw diameter: 2 x 63 mm Screw length: 17 x D Condition: used

Condition: like new (used), functionality: fully functional, Year of construction: 2018, operating hours: 74 h, machine/vehicle number: PC16 / P1551, Screw compactor and two 16 Cu Mtre closed skip units all manufactured to the highest specification by De Rooij in the Netherlands. All the equipment has been used inside a security shredding unit since new. It was decommissioned in 2023 and has only seen 74 hours of use since new. This equipment has been used by a bank for shredding currency and confidential wastes, and always situated inside a secure building. All in excellent condition and perfect working order. Itodpov Ilphsfx Ah Djk

Condition: used, mileage: 90,000 km, power: 96 kW (130.52 HP), first registration: 12/2013, overall weight: 3,500 kg, color: white, gearing type: mechanical, Year of construction: 2013, Equipment: ABS, crane, IVECO DAILY 35S13 / 4x2 HUBARBEITSBUHNE + CRANE Imported / Accident-FREE IN GOOD CONDITION! ? YEAR OF PRODUCTION: 2013 ? MILAGE: 90 000 km EQUIPMENT: ? ABS ? C. LOCKING ? EL. WINDOWS ? POWER STEERING ? Immobiliser ? TACHOGRAPH TOTAL WEIGHT: 3 500 kg WHEELBASE: 377 cm TIRE SIZE: 225/65R16C SUSPENSION: SPRING CRANE: MULTITEL 160 ALU/DS TEL: KUBA - POLSKI, ENGLISH, DEUTSCH, ITALIANO SEBASTIAN - POLSKI, DEUTSCH, ITALIANO, ????? LASZLO - MAGYAR Itodpsy Sq H Sjfx Ah Dek COSTEL - ROMÂN? (Romana facem toate formalitatile pt export inclusiv nr) RADEK - ????? Ref. nr: 0038

Condition: excellent (used), METALLKRAFT Profile Steel Shear / Punch HPS 65 DS Combined Hydraulic Profile Steel Shear and Punch with Punching Station, Notching Station, and Flat Steel, Angle Steel, and Profile Steel Shear – enables simultaneous operation at punching and profile steel shear. Punching Station - Punching Force: 65 t - Punching Capacity: max. Ø 26 x 20 / Ø 57 x 10 mm* - Throat Depth: 305 mm - Stroke Length: max. 55 mm - Number of Strokes: 25 strokes/min - Working Height: 900 mm Rod Steel Shear - Cutting Capacity Round: max. Ø 45 mm* - Cutting Capacity Square: max. 45 x 45 mm* Angle Steel Shear - Cutting Capacity L-Profile 90°: 120 x 120 x 12 mm* - Cutting Capacity L-Profile 45°: 70 x 10 mm* - Cutting Capacity U/I Profile: 120 x 58 mm - Cutting Capacity T-Profile: 90 x 11 mm - Working Height: 1,140 mm Flat Steel Shear - Cutting Capacity 90°: max. 300 x 20 / 375 x 15 mm* - Miter Cut 45°: max. FL 100 x 15 mm* - Blade Length: 380 mm - Working Height: 900 mm Notching Station - Material Thickness: max. 10 mm* - Notching Width: max. 45 mm - Notching Depth: max. 90 mm - Notching Station: 100 x 100 x 10 mm Machine Data - Motor Power: 5.5 kW | 400 V - 50 Hz - Dimensions (LxWxH): 1700 x 950 x 1880 mm - Weight (net): approx. 1,600 kg Shipping on pallet via freight forwarder possible Europe-wide. Additional machines available! Take a look at our listings. If you have any questions, feel free to contact us by message or phone: Maschinenhandel Nord Gerstenstraße 2 17034 Neubrandenburg Ijdpfx Ahoxizano Dotk

Condition: excellent (used), Year of construction: 2010, functionality: fully functional, Kaltenbach KDS 615 / KBS 750 CNC Drilling / Sawing Line – Year 2010. 3 Spindles. Automatic Tool Changer. Hard Stamping. Gripper feed. 16 metres Infeed. 16 metres Outfeed. Infeed and Outfeed Cross Transfers. KALTENBACH KDS 615 3 axes CNC drilling machine KDS 615: Drilling spindle speed range 100 - 2500 rpm Drilling spindle drive power x 15 kW Total drill length. 160 - 460 mm Drill feed range 40 - 1000 mm/min Work piece width: 620 mm Workpiece height: 440 mm Drill diameter: 10 - 40 mm Number of drill axes: 3 KALTENBACH KBS750 Itodpfx Ahezcqmxo Dek Working range 90° 750 x 500 mm Working range 60° 650 x 500 mm Working range 45° 520 x 500 mm Working range 30° 390 x 500 mm Drive power5,5 kW

Condition: used, Year of construction: 2015, Technical details: Isdpfjzq S E Rox Ah Djtk pressure: 220 t chamfer lenght: 4280 mm distance between columns: 3760 mm weight of the machine ca.: 18 t

Condition: like new (used), Year of construction: 2022, overall weight: 250 kg, BOGE DS 350 refrigerant air dryer Isdpfxjxcb Ede Ah Djtk

Condition: good (used), Year of construction: 1998, machine/vehicle number: D 028005, Offer 26157 Technical data: - Grinding wheel diameter: approx. 300 mm - Grinding wheel width: approx. 40 mm - Grinding wheel bore: approx. 70 mm - Disc speed: 1450 rpm - Working height: 1050 mm - Drive: 400 V / 1.1 kW - Space requirement: approx. W 800 x H 1200 x D 600 mm - Weight: approx. 150 kg Ijdszi Sx Iopfx Ah Detk

Year of construction: 2022, condition: ready for operation (used), controller manufacturer: SIEMENS, table load: 3,000 kg, Automated sheet metal storage system manufactured in 2022. This TRUMPF Automated Sheet Metal Production System features a storage height of 7,900 mm and a maximum load per storage location of 3,000 kg. It includes 266 storage locations and supports sheet formats of 3,050 x 1,525 mm. If you are looking to get high-quality automated storage capabilities, consider the TRUMPF Automated Sheet Metal Production System we have for sale. Contact us for further details. • Storage system: STOPA Compact II • Type: Automated sheet metal storage system with chaotic storage management • Storage height: 7,900 mm • Sheet format: 3,050 x 1,525 mm • Maximum load per storage location: 3,000 kg • Number of storage locations: 266 • Total storage capacity: 798 t • Configuration: 8 sections/towers, up to 37 storage levels per section • Pallet format: GF 3050 x 1525 x 90 mm • Pallet types: SPO, SPMgl • Loading heights: 185 / 275 / 460 mm • Functions: Automatic material storage and retrieval; automatic material supply to connected production cells; storage interface for integrated production machines • Storage control • Server operating system: Windows Server 2022 • Central storage management and automated material flow management • Integration with TRUMPF production equipment • Connected production cells • TRUMPF TruLaser 5030 fiber (L76) • Machine type: CNC 2D fiber laser cutting machine • Working area: 3,000 x 1,500 mm • Laser source: TruDisk 6001, 6,000 W • CNC control: Siemens SINUMERIK 840D sl • TRUMPF TruMatic 6000 fiber • Machine type: Combined CNC punching and fiber laser cutting machine • Working area: 3,050 x 1,550 mm • Laser source: TruDisk 3001, 3,000 W • Maximum punching force: 180 kN • Linear tool magazine: 25 positions • TRUMPF TruBend Center 7030 (B34) – Cell 1 • Machine type: Automatic panel bending center • Max bending length: 3,123 mm • Max thickness: structural steel 3.0 mm; stainless steel 2.2 mm; aluminum 4.0 mm • Max box height: 220 mm • TRUMPF TruBend Center 7030 (B34) – Cell 2 • Same specifications as Cell 1 • System functionality (summary) • Central automated storage and retrieval of raw sheet material • Automatic supply of material to connected laser, punch-laser, and panel bending cells • Automatic transfer between storage and production stations Itjdpfxozu Sugs Ah Dok • Centralized, high-capacity sheet handling • Main system configuration • 1 x STOPA Compact II automated sheet storage system • 1 x TRUMPF TruLaser 5030 fiber 2D laser cutting cell • 1 x TRUMPF TruMatic 6000 fiber punching and laser cutting cell • 2 x TRUMPF TruBend Center 7030 automatic panel bending cells Additional equipment • For TRUMPF TruLaser 5030 fiber (L76) • Automatic pallet changer • LiftMaster Compact 1530 (automatic loading and unloading) • STOPA storage connection/interface • For TRUMPF TruMatic 6000 fiber • SheetMaster 3000 x 1500 mm (automatic sheet handling) • GripMaster 3000 x 1500 mm • Storage system integration/interface • For TRUMPF TruBend Center 7030 (both cells) • 2-axis part manipulator • 5-axis rear stop • Rotary manipulator • ToolMaster Bend • Automatic loading and unloading • Storage interface • System-wide • Central storage management server (Windows Server 2022)

Condition: repair required (used), functionality: limited functionality, Cup filling machine from Hugart. It was packing 400g cups. Two line machine with an efficiency of 3600 cups per hour. I needs mechanical and electrical repairs. I can sell it as it is, but I can also recondition it and fit with a desired cup format. Details to be discussed. Isdpsxz Uiaofx Ah Detk

Year of construction: 2024, operating hours: 10 h, condition: excellent (used), functionality: fully functional, load capacity: 3,000 kg, machine/vehicle number: 0000, Aluminum crossbeam ATV-Q with 4 swivel lifting hooks, adjustable - The lightweight H-shaped crossbeam made of aluminum has a load capacity of 3,000 [kg]. Type ATV-Q-3-3x3, brand Tiger Hebezeuge. The crossbeam has been used only a few times and a maximum of 500 kg has been lifted with it. It shows only minimal signs of wear. See photos. Purchased in June 2024. The new price is €6,100.00 plus 19% VAT and shipping costs (approx. €380). Selling because it is no longer needed. Please contact me if you have any questions. Ijdpezn Raujfx Ah Dotk Description according to the manufacturer: Aluminum crossbeam with 4 swivel lifting hooks - H-shaped crossbeams made of aluminum. Product features: Type: ATV-Q-3-3x3 Load capacity: 3,000 [kg] Hook spacing: 420-3,000 [mm] Hook spacing, cross profile: 400-3,000 [mm] Aluminum load beam for crane operation Lightweight crane crossbeam in H-shape made of aluminum Suspension for single hooks, DIN 15401 With four adjustable safety lifting hooks (rotatable by 360° under load) With a quick-release system to quickly adjust the lifting hooks a) on the main profile in a grid of 50 mm b) on the cross profile in a grid of 50 mm All parts are made of either aluminum or polyamide (with the exception of the bolts and suspension hooks) The two cross profiles can be removed from the main profile Surface: plain Product description: Aluminum crossbeam ATV-Q with 4 swivel lifting hooks, adjustable - The lightweight H-shaped crossbeam made of aluminum. This aluminum crossbeam in H-shape consists of a main beam and 2 cross beams. The crane crossbeam can not only be adjusted in many ways but also easily disassembled. This simplifies transport and saves space if the crossbeam is not needed. The load-bearing devices have a type plate with manufacturer, load capacity, weight and type number, as well as a QR code with access to the EC declaration of conformity. Safety note: Note on the safe storage of crossbeams According to DGUV rule 109-017, chapter 7.5, load-bearing devices must be placed or laid down in such a way that they cannot tip over, fall or slide off.

Year of construction: 2010, condition: like new (used), Used Trumpf Trubend Series 3000 CNC pressbrake for sale VIDEO BELOW: Used Trumpf Trubend 3120 for sale 3metre x 120ton 6 axis plus pressbrake for sale. Brand/make: TRUMPF Model: TRUBEND 3120 Type: CNC hydraulic Press Brakes New 2010 Location: United kingdom Low hours – 14,000 Specification Convert Specs to Imperial Tonnage 119.749 t / 120ton Type: hydraulic downstroke Overall Length 3.1 m /3metre BH 2.7 m Stroke 199.9 mm Number of axis: 7 axis 5 axis back gauge Weight 18298 (LBS) Control CNC (T3000) 132 Ton X 10′ Trumpf TruBend 3120 CNC Press Brake Year: 2010 Specification from new: Machine Iodpehtm Ikefx Ah Djtk – Stable machine frame as welded all-steel construction – Ram, highly resistant to torsional forces – Spherical ram suspension, with ram tilt – Electro-hydraulic downstroking drive with 4-cylinder technology – Proportional valve technology – Modern block hydraulics – Electronic pressure balance – Measuring system with glass scale and frame deflection compensation – Hydraulic oil filled in the machine (lifetime lubrication) – Oil cooler Backgauge System – Backgauge system 2-axes with rack and pinion-drive for X- and R-axis, – 2 pieces back gauge fingers with safe adjustment in front of the machine Tool Holder – TRUMPF Upper tool clamping, manual and hardened – Lower tool clamping, manual and hardened Crowning – Self-regulating crowning system – Additional hydraulic CNC-crowning Control – Machine control: T3000 colour, DELEM based on Real Time for Windows – USB interfaces for keyboard, mouse, etc. Safety – Footswitch for Emergency up, down and emergency stop – Safety equipment: Side doors and manual shutter roller at the rear Services – Installation, start-up and instruction Options for Backgauge System – Back gauge system 5 axis Options for Tool Holder – Amada US Style fast clamping of upper tool holders (segmented, on entire working length) Options for Safety Device – BendGuard Options for Material Handling – Support bracket (2 pc) Delivery – June 2011 Video below: Used Trumpf V and C series cnc pressbrakes also available in stock for sale. We are always interested in buying used Trumpf pressbrakes and machines such as: TruBend 3066 TruBend 3100 TruBend 3170 TruBend Series 5000 TruBend 5085 Trubend 5130 TruBend Series 7000 TruBend 7050 TruBend 7036 TruBend 7050 TruBend Series 8000 TruBend 8230 Trubend 8400

Condition: ready for operation (used), Offered for sale is a fully automatic KASTO vertical bandsaw. Round cutting capacity: 10mm-260mm, max. square cutting capacity X/Y: 260mm/260mm, min./max. cut-off length: 5mm/600mm, feed length: 600mm, min. remnant length: 10mm, max. cutting speed: 125m/min, saw blade dimensions X/Y/Z: 4115mm/41mm/1.3mm, control: KASTO minipos 807, weight: approx. 2200kg. Inspection by appointment is possible. Itedpfjzrzn Rjx Ah Dek

Condition: used, Year of construction: 1970, functionality: fully functional, machine/vehicle number: 2.1902.01, table length: 7,000 mm, feed rate X-axis: 30 m/min, planing height: 6,900 mm, table width: 1,800 mm, The Waldrich Coburg 7DS4039 is a heavy-duty gantry or double-column planing and grinding machine (planer-type milling machine) designed for machining large and heavy workpieces. Machines from this manufacturer are primarily used in large-scale machinery construction, turbine manufacturing, printing machine production, as well as tool and die making. Iodpfxoyt Ey Ue Ah Dotk This machine features a robust portal design, high rigidity, and spacious working areas, making it particularly suitable for roughing and finishing operations on large steel or cast constructions. Waldrich-Coburg machines are renowned for their high precision and long service life in heavy-duty machining. Workpiece weight: 15–30 tons The quoted price does not include dismantling, packaging, or shipping. Sale from site; subject to prior sale. The machines are sold in used condition; any warranty or guarantee is excluded.

Condition: used, Year of construction: 2012, Trio FDS3000 skinner for up to 150 cod fillets a minute. 460mm wide conveyor. Itsdpfszawqrjx Ah Dsk