Used Widax Milling Head Ø160 M68 for sale (17,214)

Condition: used, Year of construction: 2014, x-travel 0600 mm y-travel 270 mm z-travel 430 mm table-size 1120 x 260 mm spindle turning speed range 40 - 1600 U/min Ksdpfjz R D Enex Anuenc spindle taper SK 40 feed in x - axis 50 - 1000 mm/min feed range Z-direction 24- 402 mm/min rapid traverse x + z axis 1 m/min rapid motion - y-axis 1 m/min drive capacity - spindle motor 2,2 kW total power requirement 3,5 kW weight of the machine ca. 1,4 t dimensions of the machine ca. 1,7 x 1,4 x 1,75 m Accessories: DRO and machine vice.

Condition: excellent (used), Year of construction: 2000, functionality: fully functional, The machine is in very good condition and comes from a training workshop. Technical details Knodpfx Ajz Rpcrjnujc x-travel 300 mm y-travel 160 mm z-travel 290 mm table surface area 600 x 210 mm tool taper SK 40 spindle turning speed range (16) 40 - 2000 rpm feeds -stepless- 5 - 500 mm/min rapid traverse 1,2 m/min spindle motor 1,5 / 1,9 kW total power requirement 9,5 kVA weight of the machine ca. 830 kg dimensions of the machine ca. 2000 x 2200 x 1655 mm Equipment: * 3-axis positioning control with active digital display Heidenhain TNC 123 - Manual mode: Manual operation and positioning with manual input - Automatic mode: Single-block programme run, programme storage * Fixed angle table * Movable vertical milling head, swivel range +/- 90 degr., quill stroke 60 mm * Coolant equipment * Central lubrication * Tailstock with counter bearing * Manual

Condition: excellent (used), Year of construction: 1994, operating hours: 1,930 h, functionality: fully functional, travel distance X-axis: 7,200 mm, travel distance Y-axis: 4,200 mm, travel distance Z-axis: 1,750 mm, feed rate X-axis: 15,000 m/min, feed rate Y-axis: 15,000 m/min, feed rate Z-axis: 15,000 m/min, total length: 15,000 mm, table length: 5,000 mm, total width: 15,000 mm, spindle speed (min.): 10 rpm, spindle speed (max.): 4,000 rpm, total height: 7,500 mm, table height: 1,350 mm, distance between stands: 3,500 mm, type of input current: AC, table load: 65,000 kg, workpiece weight (max.): 65,000 kg, distance table center to spindle nose: 2,300 mm, overall weight: 2,10,000 kg, spindle motor power: 50,000 W, MACHINE DATA Machine type: Portal milling machine - double column for continuous 5 axis operation Manufacturer: WALDRICH COBURG Model: 15 S - 10 FPF 300 NC Year of construction: 1994 Condition: Fully refurbished 2015 Functionality: fully functional Operating hours: 2,931 h TECHNICAL DETAILS Number of controlled axes: 5 travel distance X-axis: 7,200 mm Knedpfsvv N I Rsx Anuoc travel distance Y-axis: 4,200 mm travel distance Z-axis: 1,750 mm spindle speed (max.): 4,000 rpm working width: 3,500 mm PROVISION Machine location: Ljubljana, Slovenia Availability: now Delivery conditions: FCA Pick up at location: Ljubljana Shipping costs: upon request Planer-milling machine - double column: completely overhauled in 2014 / 2015 by Waldrich Coburg (basically everything except the casting): > New control unit > New cables > New motors > New electrics > Guideways overhauled DESCRIPTION - Heavy double-column machine for processing complex shapes - 2 pallet stations with 2 pallets (load capacity 65t each) - Machine with CNC control SIEMENS 840D sl - In 2014, conversion of the control system to SIEMENS 840D sl (incl. complete cabling and control cabinet) - in 2015 replacement of all axis motors - Various angle milling heads - NC-controlled milling head with 50 kW milling power / clamping 2.5° each with Hirth serration (type USP300C450F15S) - 2-axis NC-controlled fork head with 40 kW milling power (type UFN00SZ500) - Automatic tool changer for 76 tools (ISO 50 and 60) TECHNICAL DETAILS Travel X / Y / Z: 7,200 / 4,200 / 1,750 mm Milling width: 3,500 mm Distance spindle nose to table: 2,300 mm Milling power: 50 kW Speed: 10 - 4,000 rpm Front spindle diameter: 150 mm Spindle holder: ISO 60, ISO50 Control: Siemens 840D sl Pallet size: 3,000 x 5,000 mm Pallet load: max. 65 t Number of pallets: 2 pieces Tool changer: 76 slots Feed rate: 10 - 15,000 mm/min MACHINE DETAILS Pick-up power: 92 kW Weight: 210 t Spindle hours: 2,931 h Switch-on time: 10,870 h Bed dimensions: 12.5 x 2.3 x 0.78 m; 28.5 t Pallet dimensions: 5.35 x 3.0 x 0.4 m; 22 t Main pallet carrier dimensions: 5.1 x 2.9 x 0.5 m; 25 t Dimensions of bed section: 3.8 x 2.9 x 0.5 m; 10 t Milling spindle box dimensions: 4.1 x 1.9 x 1.5 m; 13.5 t Left/right column dimensions: 4.1 x 1.3 x 1.7 m; 10.5 t Exhaust air slide dimensions: 8.5 x 0.7 x 1.2 m; 1.1 t Control cabinet dimensions: 7.9 x 0.6 x 2.1 m; 2.8t THIS IS A TOP CLASS MACHINE FOR MOST ACCURATE WORK; HIGHLY EFFECTIVE. MACHINE IS ASSEMBLED AND UNDER POWER:

Condition: good (used), Year of construction: 2004, functionality: fully functional, overall weight: 13,500 kg, CNC turning and milling center with 9 CNC axes, Okuma MacTurn 350 W, Year of manufacture 2004, OSP-E 100L, Additional magazine, Magazine with 80 tool positions, Main spindle with C-axis, Counter spindle with C-axis, Y-axis slide at the top / milling spindle, HSK 63 tool holder, Stepless B-axis as milling spindle, Knsdpfozt Ihmex Anuoc Distance between centers 1500 mm, Spindle bore 80 mm, Max. turning diameter 550 mm, Turning diameter 350 mm, Turret at the bottom with 12 tool positions and driven tools, Interlite compact filter system 900 l, Extraction system, Spindle operating time approximately 18,300 hours, Chip conveyor, Tool changer gripper arm completely renewed, High-pressure coolant, Coordinate measuring machine (CMM) measuring arm, Tool changer overhauled, Main spindle Kitagawa B - 210, Counter spindle Kitagawa B - 208.

Condition: good (used), Year of construction: 2004, functionality: fully functional, CNC turning and milling center with 9 CNC axes, Okuma MacTurn 350 W, Year of manufacture 2004, OSP-E 100L, Additional magazine, Magazine with 80 tool positions, Main spindle with C-axis, Counter spindle with C-axis, Y-axis slide at the top / milling spindle, HSK 63 tool holder, Stepless B-axis as milling spindle, Distance between centers 1500 mm, Spindle bore 80 mm, Max. turning diameter 550 mm, Turning diameter 350 mm, Turret at the bottom with 12 tool positions and driven tools, Interlite compact filter system 900 l, Extraction system, Spindle operating time approximately 18,300 hours, Chip conveyor, Tool changer gripper arm completely renewed, High-pressure coolant, Coordinate measuring machine (CMM) measuring arm, Knodpez Dgudjfx Anusc Tool changer overhauled, Main spindle Kitagawa B - 210, Counter spindle Kitagawa B - 208.

Condition: good (used), Year of construction: 2008, functionality: fully functional, Weiler DZ 40, Year of manufacture: 2008, Siemens 840 D control, Travel X/Z: 200/350 mm, Turning diameter: 180 mm, Max. swing diameter: 560 mm, Y-axis: +/-25 mm, Q-axis / programmable tailstock, Q-axis travel: 360 mm, Q-axis measuring system: rotary, Tailstock: MK 4, Main spindle max. bar capacity: 42 mm, Spindle bore: 52 mm, Rapid traverse X/Z/Q: 30/30/20 m/min, Turret: 16 stations – all driven, VDI 25, Shank diameter: 25 mm, Driven tools up to 4,500 rpm, Knodpfez Dgvnox Anusc Parts catcher, Accessories, Driven tool holders, Fixed holders,

Condition: good (used), Year of construction: 2004, functionality: fully functional, Gildemeister GMX 400 Year of manufacture: 2004 Control system: Siemens 840 D Powerline Max. turning diameter: 640 mm Turning length: 1,585 mm Standard turning diameter: 400 mm Control: Sinumerik 840D powerline Siemens Distance between centers: 1,930 mm Main spindle: Type: ISM 90 Max. speed: 4,000 rpm Drive power - main spindle: 36 / 45 kW Max. torque: 600 Nm Spindle diameter front bearing: 150 mm Spindle bore: 107 mm Max. bar diameter: 102 mm C-axis: 0.001° Chuck diameter: 315 (max. 400) mm Milling spindle: Max. speed: 12,000 rpm Drive power - milling spindle: 13.2 / 22 kW Max. torque: 100 Nm Tool holder: HSK-A63 Holding torque: 500 Nm y-axis: +/- 110 mm b-axis: +/- 120° c-axis: 1° x-travel: 550 mm Bearing diameter: 80 / 55 mm Tool magazine: Number of tool slots: 120 positions Tool holder: HSK-A63 Max. tool length: 350 mm Chip conveyor Feeds: Rapid traverse X1/Z1: 40/60 m/min Knedeytpfzspfx Anusc Total power requirement: 70 kVA Machine weight approx.: 20.0 t

Year of construction: 2004, condition: ready for operation (used), - USED - TRAVELLING COLUMN CNC MILLING MACHINE WITH ROTARY AND SHIFTING TABLE LONGITUDINAL TRAVEL: 4000 mm TRANSVERSAL TRAVEL: 1250 mm VERTICAL TRAVEL: 2000 mm RAPID FEEDS L-T-V: 20 m/min TRANSVERSAL TRAVEL OF THE TABLE: 2000 mm PALLET: 2000 x 2500 mm; 1200 rpm MAX ADMITTED LOAD: 28000 Kg HEAD: A/B AXIS AUTOMATIC ; ISO50 DIN ; 15-4000 rpm; 30 kW; 650 Nm TOOL MAGAZINE: CHAIN-TYPE ; 41 POS CONTROL UNIT: FIDIA C20 XPOWER HIGH PRESSURE COOLANT: 12 Bar ACCESSORIES: SWARF CONVEYOR ; PORTABLE HANDWHEEL ; LASER TOOL SETTER Knedpewlwhcefx Anuoc

Condition: good (used), Year of construction: 1998, functionality: fully functional, machine/vehicle number: TLUY7024, turning length: 600 mm, turning diameter: 250 mm, spindle speed (min.): 4,000 rpm, spindle speed (max.): 4,000 rpm, spindle bore: 86 mm, rotational speed (min.): 4,000 rpm, bar passage: 76 mm, total height: 1,900 mm, total length: 4,500 mm, total width: 2,200 mm, overall weight: 6,500 kg, Equipment: documentation/manual, Takisawa TA25 CBT lathe Main spindle: collet chuck for SK65BZI collets Tailstock with jaw chuck, alternatively collet chuck for 173E collets Knsdpfoz Smhpsx Anuoc 12-station turret incl. 25 tool holders (6 driven) Fanuc 18-T control + manual guide control Operating hours in automatic mode: 16,800 hours The machine is without a drive in the turret for the driven tools; this has been removed. Otherwise, the machine can be fully used without driven tools and can be inspected while powered on. Complete manuals and documentation incl. FMB 10-65 loading magazine with traversing unit Optically and technically in very good condition, hardly used. Year of manufacture: 2018 D60 conversion kit is installed ex works

Condition: excellent (used), I am selling this machine, connected, can be tested. Max. workpiece diameter ..... 1600 mm Module ..... 16 - Knedpfx Anev Nqppeujc Power of the main electric motor ..... 12 kW Dimensions l x w x h ..... 4300 x 2000 x 3170 mm Machine weight ..... 18500 kg Can send a video of the machine, via whatsapp.

Condition: new, Dittel Marposs WB HEAD-ST50X120 / FC NP TF 0950 / O3PL2024504 Electromagnetic measuring head for installation, serial number: O14LW1379, unused, 100% functional, scope of delivery as shown in the photos. Knedpfei D Upvox Anuoc

Condition: used, Year of construction: 2007, turning diameter 65 mm turning length 150 mm Knodpfx Aezdk Evsnuec control Siemens 840D spindle passage 75 mm turning length 150 mm c-axis 2x 0,001 ° gripping station 65 mm speeds 5000 U/min rapid traverse 30 m/min turret (x-stations) 3x12 Number of axles 10 St. number of toolholder-holes 36 chip conveyor ja / yes kW coolant filtering unit ja / yes kW Number of working hours 35000 h total power requirement 22 kW weight of the machine ca. 9 t dimensions of the machine ca. 4,4 x 2 x 2,3 + Iemca m DMG Sprint 64 Linear CNC lathe, built in 2007, 10 axes, 2 spindles, 3 turrets with Iemca Master 880 loading magazine Accessories: a large number of tool holders in total 104 off, 24 of them are driven tool holder

Condition: as good as new (ex-display), functionality: fully functional, travel distance X-axis: 2,050 mm, travel distance Y-axis: 3,010 mm, travel distance Z-axis: 290 mm, warranty duration: 24 months, Top-of-the-line CNC portal milling machine as a demonstration system. Particularly suitable for processing non-ferrous metals, plastics, wood, and composite materials. vhf machines have been manufactured in Germany for over 35 years and are characterized by their ease of operation and high reliability. A professional service team ensures prompt support. Features: - Large vacuum table with a clamping area of 2,000 x 2,500 mm - T-slot clamping area at the front of 2,000 mm x 500 mm - Water-cooled spindle (40,000 rpm, S1 = 2.3 kW) - Automatic tool changer for 4 tools - Dust and chip extraction system including vacuum cleaner - Electrically controlled minimum quantity lubrication system - System cabinet for manufacturing computer and control components Price approximately 30% below the new price of the machine plus delivery, installation, and software Ksdsz Sy A Sspfx Anuenc Complete equipment and options available upon request.

Condition: ready for operation (used), travel distance X-axis: 1,500 mm, travel distance Y-axis: 700 mm, travel distance Z-axis: 550 mm, spindle speed (max.): 2,066 rpm, spindle speed (min.): 30 rpm, Huron MU6 Universal Milling Machine Model: MU6 Table Size: 2000 x 460mm ‘X’ Longitudinal Travel: 1500mm ‘Y’ Cross Travel: 700mm ‘Z’ Vertical Travel: 550mm Spindle Speeds: 30 – 2066 RPM Ksdpfx Anjz S Nkrouenc Spindle Taper: 50 INT Machine with: Digital Readout

Condition: excellent (used), Year of construction: 2023, 400mm swing, 220mm max diameter, 490mm between Centres, Siemens 828 Control, 65mm bar capacity, 12 station VDI30 turret, 17kW Spindle Motor, Spindle Speed 4000rpm, 0.001 degree C axis, +/- 35mm Y axis, Knedpfx Aez Srv Djnuec low volt light, coolant, Tool setter, Tailstock, swarf conveyor

Condition: used, machine/vehicle number: 1811, 18er Valve Monobloc volumetric piston filler with 6 head capper filling valves: 18 capacity / hour ca.: 9000 Kjdpfoz S Rcijx Anujnc capping heads: 6 working direction: right-left (CCW)

Condition: excellent (used), Catalog number 6747 TECHNICAL DATA - max. planing width 170mm - max. planing height 130mm 7 spindles: 1) horizontal lower 170mm 4kW 2) vertical right 130mm 5.5kW Knjdpfjzwwmajx Anusc 3) vertical left 130mm 5.5kW 4) vertical right 130mm 5.5kW 5) horizontal upper 170mm 4kW - 5 spindles with electrically adjustable up/down movement 6) horizontal lower 170mm 5.5kW 7) universal 170mm, adjustable at an angle of 180° 7.5kW - diameter of all spindles 35mm - all spindles adjustable up/down and left/right - 6 toothed feed rollers on top, including 2 double rollers - 4 rubber feed rollers on top - feed rollers with pneumatic pressure - 1 pressure roller on the side - 2 guide strips on the table - electric adjustment of planing thickness 0.37kW - length of the infeed table 2480mm - stepless adjustment of feed speed - feed motor 2.2kW - diameters of dust extraction nozzles 1x135mm, 5x120mm - dimensions (L/W/H) 5550x1900x1660mm - weight approx. 3500kg ADVANTAGES - German-made - with 7 heads - universal spindle - used planer, very good condition Net price: 27900 PLN Net price: 6488 EUR Net price calculated based on an exchange rate of 4.30 PLN/EUR (price may change in case of significant exchange rate fluctuations)

Condition: used, Year of construction: 2013, operating hours: 51,438 h, functionality: fully functional, turning length: 2,000 mm, turning diameter: 630 mm, spindle motor power: 34 W, spindle speed (max.): 4,000 rpm, spindle bore: 102 mm, travel distance X-axis: 650 mm, travel distance Y-axis: 400 mm, travel distance Z-axis: 2,050 mm, rapid traverse X-axis: 40 m/min, rapid traverse Y-axis: 30 m/min, rapid traverse Z-axis: 40 m/min, type of input current: AC, feed rate X-axis: 40 m/min, feed rate Y-axis: 40 m/min, feed rate Z-axis: 30 m/min, total height: 2,670 mm, total length: 7,601 mm, total width: 4,215 mm, spindle nose: 220h5, overall weight: 24,000 kg, Equipment: documentation/manual, Control system: Siemens 840D sl with ShopTurn Year of manufacture: 2013 Spindle hours: 16,310 Location: Germany Equipment: -Main spindle ISM 102 -Counter spindle ISM 102 -Milling spindle HSK63A 12,000 rpm -Eccentric turning and milling -Milling of gears using the involute method -Easy Tool Monitor for Siemens control system -Chuck flushing system, external -Chuck flushing system, counter spindle Knedpfx Anez Tc Tpjuoc -Differential pressure monitoring for H-spindle -Differential pressure monitoring for C-spindle -Coolant supply through the counter spindle -Partially hollow chuck, Ø 104 mm -Tailstock function for the counter spindle -Rest support for rest 30-245 mm -Rest slide, NC-controlled -BFA 8/20/80 bar, 980 l, cooler -Hinged belt chip conveyor -Automatic sliding hood, electric -Tool measuring device -Chain magazine for 120 tools HSK63A -Signal light, 4-way -Cleaning of the safety glass -Coolant spray gun -Control cabinet lighting -Oil mist separator Including the following overhaul/repair measures: -General overhaul of main spindle S1 HSK 63 12,000 rpm -Replacement of safety glass -Replacement of hoses (pneumatics, cooling system, CNC)

Condition: used, total height: 3,200 mm, total width: 3,200 mm, total length: 8,000 mm, Year of manufacture: 1996 Empty weight: 26.000 kg Price: On request Bed Milling machine Bed Miller Model: CNC Manufacturer: Anayak Type: FBZ-HV-4000 CNC: Heidenhain Year: 1996 Bed-dimensions: 4500x800mm X-travel: 4000mm Y-travel: 935mm Z-travel: 1000mm Rotatable Fräsekopf Spindle-speed: 3000rpm Knedpfxjz R N Dde Anujc Spindle-take: ISO 50 Incl. peripherals and documents Dismantled for transport Video available! Machine-dimensions: 8000x3200x3000mm Machine-weight: 26000kg - Year: 1996 - Documentation available: Yes - CE marking present: Yes - Serial number: 11676-FBZ - Drive system: CNC - Control system brand: Heidenhain - Number of axes [pcs]: 3 - X-axis travel [mm]: 4000 - Y-axis travel [mm]: 935 - Z-axis travel [mm]: 1000 - Table length [mm]: 4500 - Table width [mm]: 800 - Tool holder: ISO50 - Max. spindle speed [rpm]: 3000 - Transport dimensions: 8000mm x 3200mm x 3200mm (l x w x h) - Transport weight [kg]: 26000kg - Transport packages [pcs.]: 1 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: good (used), Year of construction: 2011, operating hours: 18,000 h, functionality: fully functional, turning length: 740 mm, turning diameter: 430 mm, spindle bore: 65 mm, travel distance X-axis: 280 mm, travel distance Y-axis: 100 mm, travel distance Z-axis: 750 mm, rotational speed (max.): 5,000 rpm, rotational speed (min.): 10 rpm, bar passage: 65 mm, overall weight: 8,000 kg, Equipment: documentation/manual, rotational speed infinitely variable, Turn-milling center EMCO HYPERTURN 665 MC Plus Year of manufacture: 2011 Control system: Sinumerik 840D Operating hours: 18,300h (according to hour meter) Technical data: Main spindle speed: 0 - 5,000 rpm Drive power: 21/29 kW (100/40%) Torque: 250 Nm Spindle mounting: KK6 Bar diameter: 65 mm Counter spindle speed: 0 - 7,000 rpm Drive power: 17/21 kW (40/100%) Torque: 130 Nm Spindle mounting: KK6 Milling spindle speed: Mounting: Capto C4 Number of magazine positions: 23 Travel ranges: X1/Z1: 280/750 mm Knjdpez Tc Umjfx Anuec X”/Z2: 205/750 mm Y-axis: +/- 50 mm Lower turret: Mounting: VDI 30 Number of positions: 12 Number of powered tools: 12 Accessories: - Emco short magazine LM 1200 - Chip conveyor - High-pressure coolant system - Parts catcher - Extensive equipment with tool holders

Condition: good (used), Year of construction: 1998, functionality: fully functional, CNC turning machine EMCOTURN 365 MC with counter spindle Ksdpfx Anez Tc Uteujnc Year of manufacture: 1998 Control system: Sinumerik 840D Accessories: - Parts collector - Chip conveyor Further details to follow Includes a wide range of accessories.

Year of construction: 2005, condition: good (used), functionality: fully functional, machine/vehicle number: 8382, 2-head welding machine for PVC profiles Kjdpfx Anezdq Ttoujnc

Condition: good (used), Year of construction: 1990, 1 used universal tool milling machine Knsdpfez S Ubcjx Anuec Manufacturer: Deckel, Type: FP 5 CC Year of manufacture: 1990 Control system: Dialog 11 X-axis travel: 800 mm Y-axis travel: 600 mm Z-axis travel: 550 mm Spindle speed: 25 - 6,300 rpm Tool holder: SK 40 Drive power: approx. 12 kW Machine weight: approx. 5000 kg

Condition: used, machine/vehicle number: 2820-0419, x-travel:500 mm y-travel:400 mm z-travel:400 (340) mm table surface area:710 x 430 mm turning speed range:40 - 4000 U/min feed range:02 - 3600 mm/min rapid feed:4,0 m/min milling-head swivable +/-:90° quill stroke:80 mm spindle taper:SK 40 control:Contour 3 total power requirement:5,5 kW weight of the machine ca.:1,9 kg Knsdpjh Ra Nisfx Anujc dimensions of the machine ca.:2 x 1,4 x 1,8 m Deckel Model FP3 A - Spilndle Head can be swiveled 90 ° (Left of Right) - Universal tilting rotary swivel table (Size - 710 x 430 mm - Deckel Contour 3 CNC control Systems. - Hydralic Tool clamping system SK40 with Pull studs DIN 2080 or DIN 69872 - Portable Electronic Handwheel for All Axis Control Central Lubricant system, Chip tray with Splash cabin will provide complete protection, clean and safe working Area.

Condition: used, Year of construction: 2013, x-travel 700 mm y-travel 700 mm z-travel 700 mm control 840 D sl Siemens Max. Speed Subspindle 10.000 min/-1 power capacity - main spindel 42 kW max. Torque 236 Nm tool taper HSK-A 63 DIN 69893 Number of pallet-stations 10 pos. size of pallet 500 x 500 mm max. workpiece weight 600 kg max. workpiecediameter 800 mm max. workpiece height 1.000 mm number of toolpositions 180 pos. tool taper HSK-A63 max. tool diameter 80 mm max. tool-dia with free toolbox 160 mm max. tool length 550 mm max. tool weight 12,0 kg change-time tool to tool 0,9 sec change-time chip to chip 2,8 sec rapid traverse ( X / Y / Z ) 60 m/min feed speeds max. 60.000 mm/min Accelaration x/y/z: 6 / 6 / 5 m/s² feed power 10 kN total power requirement 67 kW weight of the machine ca. 9,7 t dimensions of the machine ca. 7,5 x 5,0 x 2,8 m CNC - Machiningcenter Horizontal Knsdpfoz I Dy Sox Anujc DECKEL MAHO - DMC 65 H duoBLOCK