Beli Dmg Ctv-250 bekas (11.043)

Kondisi: bekas, Tahun pembuatan: 2011, Technical Details: Turning length: 310 mm Swing diameter over bed: 500 mm Swing diameter over cross slide: 290 mm Centre distance: 500 mm X-axis travel: 190 mm Z-axis travel: z1: 335 / z3: 370 mm Y-axis travel: 80 mm Njdsw S Efzopfx Abwjlc Spindle speed: 6000 rpm Control: Heidenhain CNC Pilot 4290 Spindle bore: 73 mm Bar diameter: 50 mm Tool turret – number of stations: 12 Tool holder: VDI 30 mm Rapid traverse X + Z axes: 30 m/min Operating hours (power-on): 36,443 h Operating hours (spindle): 8,545 h Interface: yes Total power requirement: 20 kVA kW Chip conveyor dimensions (LxWxH): 3.2 x 0.45 x 1.5 m CNC Slant Bed Lathe With 3-jaw chuck Ø 160 mm incl. matching flange (max. speed 4,500 rpm) and additionally 2 sets of spare jaws. 12-station turret, all stations driven; Sauter disc turret (C-axis = 300 rpm). Main spindle torque: 95 Nm at 100%, 127 Nm at 40%. Chip conveyor 450 K-1/250; year of manufacture: 2000 Electrical cabinet with Rittal cooling The machine does not have a hydraulic chuck. A manual chuck has been installed by the previous owner. The machine is for sale in non-functional condition. There is an unknown malfunction in the turret, so reference runs and axis movement are not possible. Therefore, machining operations cannot currently be performed. The machine is offered for sale as in need of repair! i.D. *

Kondisi: bekas, Tahun pembuatan: 1987, Technical Details: X-axis travel: 700 mm Y-axis travel: 500 mm Z-axis travel: 600 mm Table tilting +/-: A-axis: 20° / 60° Table rotation: B-axis: 360° Control: Maho 432 (3D path control) Max. milling capacity: ST: 60 mm and GG: 22 mm Tool magazine with: 24 positions Spindle speed range: 20 - 6300 rpm Max. table load: 200 kg Nljdpfx Abeu Idbyswjc Spindle taper: ISO 40 (hydraulic clamping) Spindle head swivelling left and right: 90° (manual) Quill stroke: 80 mm Feed rate range: X/Z: 1 - 3000, Y: 1 - 4000, B: 0.1 - 3000°/min. mm/min Rapid traverse: X/Z: 10, Y: 8, B: 20 rpm, m/min Control voltage: 110/220 V Total power requirement: approx. 20 kVA Machine weight approx.: 5.5 t Machine dimensions approx. LxWxH: 3.0 x 2.4 x 2.25 m Space requirement approx.: 5.2 x 5.0 x H: 2.3 m NC rotary table Ø 520 mm with A and B axes Adjustable three-phase motor with 4-speed gearbox Work spindle can be pivoted out for horizontal spindle use Equipment: -Handheld control unit -Coolant system -Machine lighting

Kondisi: baik (bekas), Tahun pembuatan: 2010, diameter mata gergaji: 250 mm, berat keseluruhan: 130 kg, tegangan masuk: 380 V, daya pompa pendingin: 100 W, Huvema HU250 DV cold circular saw for sale Manufacturer: Huvema Model: HU 250 DV Year of manufacture: 2010 Voltage: 400 V 50 Hz Mounted on stand, swiveling head, quick-release clamp. 2-speed motor Coolant system with pump Saw blade dimensions: 250 x 32 mm Cutting capacity at 45° (rectangular): 50 x 60 mm Cutting capacity at 45° (round): 65 mm Nsdotwdvispfx Abwjlc Cutting capacity at 45° (square): 55 mm Cutting capacity at 90° (rectangular): 55 x 95 mm Cutting capacity at 90° (round): 70 mm Cutting capacity at 90° (square): 70 mm Dimensions: Height: 150 cm Width: 60 cm Length: 90 cm Weight: approx. 150 kg

Kondisi: hampir baru (bekas), Tahun pembuatan: 1991, Fungsionalitas: berfungsi sepenuhnya, daya: 30 kW (40,79 hp), tegangan masuk: 200 V, jenis arus masuk: tiga fasa, gaya penekanan: 250 t, lebar meja: 760 mm, panjang meja: 2.700 mm, berat keseluruhan: 35.000 kg, gaya punching: 250 t, Perlengkapan: dokumentasi / manual, penghadang cahaya keselamatan, AIDA NC2-250(1) 250t Eccentric Press in Excellent Condition /ctA2/ Manufacturer: AIDA Model: NC2-250(1) Press Force: 160t Year of Manufacture: approx. 1991 Stroke Length: 170 mm Shut Height Over Table: (adjustable) 280–400 mm Table Dimensions: 2700 x 760 mm Ram Dimensions: 2100 x 700 mm Electrical Power: 3x200V (!!), 30kW – Japanese standard Net Weight: 35,000 kg Dimensions: 2760 x 2800 x 3980 mm Nlodpou Dxb Tefx Abwec Automatic lubrication system. Automatic cutting oil dispensing – RAZIOL EST-02 Optionally available with decoiler and straightening machine.

Kondisi: sangat baik (bekas), Tahun pembuatan: 2018, Fungsionalitas: berfungsi sepenuhnya, jenis arus masuk: AC (pendingin udara), spiral conveyor RNA SRC-N 550mm, vibratory feeder with control unit Manufacturer/Type: RNA SRC-N 250-2R Upper bowl diameter: 550 mm Lower bowl diameter: 250 mm Voltage: 230 Volt, 50Hz Protection rating: IP 44 Vibration frequency at 100Hz: 6000 /min Vibration controller Lower bowl diameter: 250 mm Upper bowl diameter: 380 mm Internal bowl height: approx. 70 mm Nodpfx Abewav R Sewslc Overall dimensions: Height: 700 mm Width: 600 mm Weight: 80 kg In good condition!

Kondisi: baik (bekas), We offer a Heraeus heating and drying oven for sale. Heraeus Heating and Drying Oven Manufacturer: HERAEUS Model: 6200 Condition: Used, in good condition Forced Air Drying Oven: up to 250°C Internal volume: 180 litres Njdjvzqyfjpfx Abwslc Temperature controller and timer Air circulation Electrical specifications: 2800 Watts, single phase, 230 Volts, 50 Hz, 12.3 A, IP20 External dimensions: Width: 800 mm Depth: 890 mm Height: 810 mm Internal dimensions: Width: 510 mm Depth: 550 mm Height: 650 mm Weight: 100 kg

Kondisi: sangat baik (bekas), Tahun pembuatan: 2017, Fungsionalitas: berfungsi sepenuhnya, pergerakan X = 1.450 mm, Y = 700 mm, Z = 550 mm kecepatan cepat 42 m/menit rentang putaran spindle 20 hingga 14.000 rpm Spindle inline dengan daya 20,3 kW / 14,5 kW (40/100% beban) sistem penjepit alat SK40 DIN69871 batang penjepit sesuai DIN69872 pergantian alat dengan magazin 20 posisi SK40 (piringan dengan dudukan dalam rumah dan double gripper) ukuran area penjepitan meja 1.760 x 750 mm Nljdpfx Abjylpf Sswec pembacaan langsung pada sumbu X, Y, Z Mesin terhubung, dapat diuji

Kondisi: sangat baik (bekas), Stepped clamp (28366)\nClamping height: 200 - 250 mm\nT-slot width: 12 mm\nClamping screw: M10\n4 units available\nWeight: 8.5 kg Nlsdpfx Abeln Ulaowec

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2004, jam operasional: 31.960 h, produsen pengendali: HEIDENHAIN, jumlah sumbu: 2, en Nedjx Nr T Uspfx Abwelc

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2005, jam operasional: 37.064 h, jarak pergerakan sumbu X: 1.000 mm, jarak lintasan sumbu Y: 1.000 mm, jarak gerak sumbu Z: 1.000 mm, produsen pengendali: SIEMENS, model controller: 840D powerline + Shopmill, kecepatan spindel (maks.): 8.000 rpm, daya motor spindle: 44.000 W, jumlah sumbu: 5, This 5-axis DMG DMC 100 H was manufactured in 2005. It features a Siemens 840D Powerline control with Shopmill, travel paths of 1,000 mm in the X, Y, and Z axes, and a spindle speed of up to 8,000 rpm. The machine is equipped with an HSK 100 tool holder, 270/360 tool stations, and two 800 x 800 mm pallets. Take this opportunity to purchase this DMG DMC 100 H horizontal machining center. Contact us for more information. Additional equipment • Electronic handwheel • Operating mode 4 • Oil mist extractor • Internal coolant supply (IKZ): 40 bar • Paper band filter • Chip rinsing gun Machine advantages Nlodpfx Abeyaaugswjc Technical features of the machine • Number of pallets: 2 • Pallet size: 800 x 800 mm • Tool positions: 270 / 360 • Touch probe: Renishaw OMP 60 • Spindle power: 44 kW (40% duty cycle) or 32 kW (100% duty cycle) • Maximum torque: 1241 Nm (40% duty cycle) or 827 Nm (100% duty cycle) Additional information Machine is still under power.

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2005, jam operasional: 53.201 h, kecepatan spindel (maks.): 4.000 rpm, jarak pergerakan sumbu X: 550 mm, jarak lintasan sumbu Y: 220 mm, jarak gerak sumbu Z: 1.585 mm, produsen pengendali: SIEMENS, berat alat: 10.000 g, jumlah sumbu: 7, This 7-axis Gildemeister GMX 400 Linear was manufactured in 2005. It features a maximum turning diameter of 640 mm and a turning length of 1585 mm. The machine is equipped with a Siemens Sinumerik 840D Powerline CNC control and offers rapid traverse speeds of 40 m/min in the X axis. If you are looking for advanced turning and milling capabilities, consider the Gildemeister GMX 400 Linear turn-mill center we have for sale. Contact us for further details. • B-axis swivel range: ±120° • C-axis resolution: 0.001° • Rapid traverse (X/Y/Z): 40 / 24 / 60 m/min • Max. turning diameter: 640 mm • Standard turning diameter: approx. 400 mm • Max. turning length: 1585 mm • Bar capacity: approx. 90-92 mm • Chuck diameter: 250 mm • Counter spindle speed: 4000 rpm • Max. torque: approx. 600-730 Nm • Milling spindle: Integrated motor spindle (ISM) with B-axis • Milling spindle speed: 12,000 rpm Njdpfx Abey Uvxxjwelc • Milling spindle power: 13.2 / 22 kW • Milling spindle max. torque: approx. 100 Nm • Turret: 12-station driven turret • Tool shank: 40 mm, DIN 69880 • Tool length limitation: 200-350 mm • Max. tool diameter: 80-140 mm • Max. tool projection: 60-70 mm • Connected load: 100 kVA • Additional notes: Linear drive technology; Made in Germany; Machine under power and available for inspection Technical Specification Counter Spindle: Yes Driven Tools: Yes

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2006, jam operasional: 15.869 h, jarak pergerakan sumbu X: 1.035 mm, jarak lintasan sumbu Y: 560 mm, jarak gerak sumbu Z: 510 mm, produsen pengendali: HEIDENHAIN, model controller: iTNC 530 E, kecepatan spindel (maks.): 12.000 rpm, jumlah sumbu: 4, Mesin 3-sumbu tipe DMG DECKEL MAHO 1035V ini diproduksi pada tahun 2006. Mesin ini memiliki panjang lintasan 1.035 mm pada sumbu X, 560 mm pada sumbu Y, dan 510 mm pada sumbu Z. Dilengkapi dengan kontrol Heidenhain iTNC 530 serta magazin alat dengan kapasitas 30 posisi. Jika Anda mencari kemampuan pemesinan berkualitas tinggi, pertimbangkan pusat pemesinan vertikal DMG DECKEL MAHO 1035V yang kami tawarkan untuk dijual. Silakan hubungi kami untuk informasi lebih lanjut. Njdpfxjy Uvnye Abwelc - Nomor perangkat lunak PLC: 4B0000_HEDR_02C - Status pengembangan: L3 - DSP1: 340514 03.1 - ICTL1: 340517 01 - Waktu operasi kontrol: 40.697 jam - Waktu operasi mesin: 38.700 jam - Waktu berjalan program: 15.863 jam - Waktu titik referensi sumbu 1: 14.213 jam / 15.835 jam - Waktu siklus penukar alat: 1.585 jam - Taper spindle: SK 40 - Kapasitas magazin alat: 30 posisi (magazin rantai) - Probe pengukur: Heidenhain TS640 - Handwheel elektronik: Heidenhain - Daya terpasang: 35 kVA - Arus nominal maksimum (A Jn max): 50 A - Sekring / arus masukan: 63 A - Tegangan jaringan: 400 V - Frekuensi: 50/60 Hz - Tegangan kontrol: 230 V - Catu daya DC: 24 V - Sistem pelumasan sentral: Unit pompa Vogel dengan gemuk cair Divinol Lithogrease 000 - Unit pengatur pneumatik: Unit filter dan pengatur udara terintegrasi dari SMC / Festo - Konveyor serpihan tidak termasuk dalam paket penjualan Spesifikasi Teknis Pendingin melalui spindle: Tidak

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2012, jam operasional: 27.000 h, jarak pergerakan sumbu X: 1.000 mm, jarak lintasan sumbu Y: 1.250 mm, jarak gerak sumbu Z: 1.000 mm, berat keseluruhan: 21.000 kg, kecepatan spindel (maks.): 18.000 rpm, jumlah sumbu: 5, This 5-axis DMG MORI DMC 100U duoBlock was manufactured in 2012. It features a pallet clamping area of 1000 × 800 mm, rapid traverse speeds up to 60 m/min, and a high-speed spindle with 18,000 rpm. The machine is equipped with a 60-position tool changer and a 980-liter coolant system. Accessories such as a chip conveyor, oil mist separator, and BLUM laser tool measurement enhance the machine’s functionality. If you are seeking high-quality milling capabilities, consider the DMG MORI DMC 100U duoBlock we have for sale. Contact us for further information. • Worktable: • Number of pallets: 2 (working/preparation area) • Pallet clamping area: 1000 × 800 mm • Pallet weight: 630 kg • Axis travels: • B: 210° • C: 360° • Motions: • Acceleration (X/Y/Z): 7.0 / 6.5 / 6.5 m/s² • Resolution (X/Y/Z): 0.001 mm • Positioning tolerance (X/Y/Z): 0.006 mm • Positioning tolerance (A/B/C): 8 / 6 / 5 arcsec • Workpiece capacity: • Max. diameter: 1000 mm • Max. height: 1600 mm • Max. weight: 2000 kg • Spindle: • Torque: 119 Nm (40% duty cycle) • Tool changer: 60 positions • Coolant unit: 980 liter high-pressure through-spindle coolant with paper belt filter • Availability: In excellent condition, available for demonstration (video available) Additional Equipment • 7 additional pallets • Chip conveyor • Oil mist separator • Infrared measuring probe Nsdpjx D Eh Ejfx Abwslc • BLUM laser tool measurement • 3D Quick Set preparation • Cooling • Blown air through the spindle • Maintenance kit (filters, scrapers, installation tools) • Complete manuals (English, Estonian and digital copy)

Tahun pembuatan: 2016, Kondisi: siap digunakan (bekas), Tersedia sistem penanganan robot Fanuc/DMG Mori untuk mesin CNC yang telah digunakan dengan CTX. Tipe robot: Fanuc M-20iA, Gripper 1: Gripper ganda, Gripper 2: Gripper poros, berat maksimum benda kerja pada mode gripper tunggal/ganda: 10kg/2x5kg, diameter maksimum benda kerja: 125mm, berat: sekitar 1075kg. Termasuk berbagai rak dan pelindung keamanan. Dokumentasi tersedia. Pemeriksaan di lokasi dimungkinkan. Njdpfxszcfk Ss Abwjlc

Kondisi: bekas, Tahun pembuatan: 2000, Pusat Pemesinan 5-Sumbu Pabrikan: DMG Tipe: DMU125 P Tahun: 2000 Kontrol: Heidenhain TNC430 Nljdpjuwnzvefx Abwjc Mesin dengan kepala frais HV dan meja putar NC. Dudukan spindle ISO 50 Kecepatan spindle hingga: 8000 rpm Jarak gerak X 1250 mm Y 880 mm Z 800 mm Sumbu A dan B Majalah alat pos.120. Dokumentasi mesin tersedia.

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. Complete machine documentation and data backup available. Good overall condition. Nljdpjiihxhsfx Abwoc

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2015, jam operasional: 6.361 h, Fungsionalitas: berfungsi sepenuhnya, jarak pergerakan sumbu X: 600 mm, jarak lintasan sumbu Y: 560 mm, jarak gerak sumbu Z: 510 mm, gerak cepat sumbu X: 36 m/menit, pergeseran cepat sumbu Y: 36 m/menit, pergerakan cepat sumbu Z: 30 m/menit, produsen pengendali: Siemens, model controller: 840D ShopMill, panjang benda kerja (maks.): 900 mm, lebar benda kerja (maks.): 560 mm, tinggi benda kerja (maks.): 630 mm, berat benda kerja (maks.): 600 kg, tinggi total: 3.000 mm, panjang total: 4.000 mm, lebar total: 5.000 mm, lebar meja: 900 mm, panjang meja: 560 mm, beban meja: 600 kg, berat keseluruhan: 5.000 kg, kecepatan spindel (maks.): 12.000 rpm, jam operasional spindle: 6.361 h, hidung spindel: SK40 (DIN69871), jumlah spindel: 1, jumlah slot dalam magazin alat: 30, tegangan masuk: 400 V, Perlengkapan: dokumentasi / manual, kecepatan rotasi dapat diubah tanpa batas, konveyor serpihan, Mesin DMG MORI ecoMill 600V buatan Jepang ini kami ambil dalam kondisi operasional langsung dari produksi dan masih dalam keadaan bersih. CMX 600V (ecoMill 600V) dilengkapi dengan konstruksi rangka-C (konfigurasi klasik) dan meja yang dapat bergerak (sumbu-X), dirancang untuk pekerjaan milling umum/serbaguna. Opsi & aksesori tambahan: - Siemens 840D SlimLine termasuk simulasi 3D. - PROGRESSLine (menampilkan sisa waktu produksi dan jumlah produk untuk satu proses pemesinan penuh). - Konveyor serbuk serpihan Nledpfxoy Dg Euj Abwsc - Pistol pembilas - Persiapan untuk pendinginan internal. - Dokumentasi asli

Kondisi: sangat baik (bekas), Tahun pembuatan: 2012, nomor mesin/kendaraan: 11920000463, Fungsionalitas: berfungsi sepenuhnya, jarak pergerakan sumbu X: 1.000 mm, jarak lintasan sumbu Y: 1.000 mm, jarak gerak sumbu Z: 1.000 mm, jumlah slot dalam magazin alat: 60, panjang meja: 8.000 mm, lebar meja: 1.000 mm, daya motor spindle: 35.000 W, pergerakan cepat sumbu Z: 60 m/menit, gerak cepat sumbu X: 60 m/menit, pergeseran cepat sumbu Y: 60 m/menit, hidung spindel: HSK-63, Perlengkapan: dokumentasi / manual, kecepatan rotasi dapat diubah tanpa batas, konveyor serpihan,

Kondisi: bekas, Tahun pembuatan: 2007, de-to-hu-it-lt-lv-nb-nl-pl Nlsdpfx Absyb S Ibswoc

Kondisi: sangat baik (bekas), Tahun pembuatan: 2015, drehdurchmesser-100mm Njdpfx Aboy T R Rtjwelc

Kondisi: sangat baik (bekas), Tahun pembuatan: 2008, x-axis travel 630 mm y-axis travel 560 mm z-axis travel 560 mm Control system MillPlus HEIDENHAIN Table size - longitudinal 1000 mm Nledpfx Aevwgp Ujbwsc Table size - cross 600 mm Spindle speeds 12,000 rpm Number of axes 4 Rapid traverse 30 m/min Tool changer 24 positions Machine weight approx. 9 t The DMU 60 monoBlock is in very good condition and immediately available. Accessories: - Touch probe - Internal coolant supply (IKZ) 50 bar

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2015, jam operasional: 1.748 h, jarak pergerakan sumbu X: 635 mm, jarak lintasan sumbu Y: 510 mm, jarak gerak sumbu Z: 460 mm, produsen pengendali: SIEMENS, model controller: SINUMERIK 840 D, tinggi total: 2.650 mm, lebar total: 2.530 mm, lebar meja: 790 mm, panjang meja: 560 mm, beban meja: 600 kg, berat keseluruhan: 3.900 kg, kecepatan spindel (maks.): 12.000 rpm, daya motor spindle: 17.000 W, jumlah slot dalam magazin alat: 20, panjang produk (maks.): 2.050 mm, jumlah sumbu: 3, This 3-axis DMG MORI ecoMill 635 V was manufactured in 2015. It features a travel range of 635 mm on the X-axis, 510 mm on the Y-axis, and 460 mm on the Z-axis. The machine is equipped with a robust table measuring 790 x 560 mm and supports a maximum table load of 600 kg. If you are looking for high-quality machining capabilities, consider the DMG MORI ecoMill 635 V vertical machining center we have for sale. Contact us for further details. • CNC control: electronic handwheel • Operating hours: Power-on time approx. 13,550 h; Spindle cutting time approx. 1,748 h • Table: 790 × 560 mm • Spindle: 12,000 rpm; SK40 / ISO40; Power approx. 13-17 kW • Tool magazine: 20 slots; automatic double-arm tool changer • Rapid traverse: 30 m/min • Coolant: flood coolant system • Drives: digital AC servo drives • Electrical: 400 V / 50 Hz / 3-phase; rated power 17 kVA • Other: Machine is connected and under power; very low spindle milling hours for its year; in good technical condition Additional equipment • Scraper chip conveyor Nledpfey T R I Eex Abwec • Discharge height: 950 mm • Tank capacity: 200 l • Coolant spray gun for chip removal • Standard 4-color signal light • PROGRESSline & Planolight package Technical Specification Taper size SK 40

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2021, kecepatan spindel (maks.): 6.500 rpm, berat keseluruhan: 6.000 kg, Diameter batang (maks.): 42 mm, jarak pergerakan sumbu X: 50 mm, jarak lintasan sumbu Y: 350 mm, produsen pengendali: MITSUBISHI, model controller: M730UM, jumlah sumbu: 10, This 10-axis DMG MORI Sprint 42/10 linear was manufactured in 2021. It features a maximum spindle speed of 6,500 rpm and is equipped with a high-pressure coolant system rated at 20 bar. The machine comes with a 3,200 mm long bar feeder and offers advanced capabilities for precision turning. If you are looking for a high-quality lathe, consider the DMG MORI Sprint 42/10 linear model we have available for sale. Please contact us for further information. • Maximum spindle speed 1: 6,500 rpm • Maximum spindle speed 2: 6,500 rpm • Maximum Z-axis travel: 120 mm • Electrical phases: L1, L2, L3, N, PE • Power consumption: 57 kVA • Maximum input current: 82 A • Main fuse: 100 A • Short-circuit withstand capacity: 5 kA • Maximum voltage: 440 V • Operating voltage: 400 V • Voltage tolerance: ±10% • Frequency: 50 Hz • AC voltage: 230 V • DC voltage: 24 V • Counter spindle flushing: Included • Internal coolant supply to counter spindle: Included • Internal coolant supply to main spindle: Included • Radial driven drilling and milling unit for turret: Included • Axial driven drilling and milling unit for turret: Included • Angle-adjustable drilling and milling unit: Included • High-pressure coolant system: 20 bar • Bar feeder: IEMCA BOSS 552 • Bar feeder length: 3,200 mm Njdpfxsy T Hzuo Abwolc Technical Specification Through-spindle coolant: Yes Counter spindle: Yes Driven tools: Yes

Kondisi: bekas, Tahun pembuatan: 2009, de-hu-001 Nodpfjy Ty A Sex Abwolc

Kondisi: bekas, Tahun pembuatan: 2019, en-DEMO-001 Nledpfx Abox H Tt Dswec