Beli Deckel Maho Dmu 50 Eco bekas (327)

Kondisi: bekas, Tahun pembuatan: 2002, x-travel 880 mm y-travel 630 mm z-travel 630 mm Control system: iTNC 530 Heidenhain Main spindle: Speed range – main spindle: 20 – 10,000 rpm Drive power – main spindle: 13 kW Torque: 130 Nm Tool holder: BT 40 DIN 69872 Work table: Clamping surface: 1,250 x 700 mm Max. table load: approx. 500 kg Table diameter: 700 mm T-slots: 11 x 14 x 63 mm Max. table rotation speed: 15 rpm Tool magazine: Number of tool stations: 32 (2 x 16) positions Tool holder: BT 40 Max. tool diameter: 80 / 130 mm Max. tool diameter with free adjacent station: 160 mm Max. tool length: 315 mm Max. tool weight: 8.0 kg Feeds: Feed rate: 20 – 15,000 mm/min Rapid traverse: 12 m/min Total power requirement: 30 kVA Machine weight: approx. 9.0 t Installation dimensions: approx. 4.0 x 3.0 x 2.5 m CNC Universal Machining Centre DECKEL MAHO – DMU 80 T Dcedjvn Ur Sjpfx Adgsb - 5 axes - Rotary table in fixed table - Conversion to SK 40 optionally possible!

Kondisi: sangat baik (bekas), Tahun pembuatan: 2000, jarak pergerakan sumbu X: 800 mm, jarak lintasan sumbu Y: 700 mm, jarak gerak sumbu Z: 600 mm, gerak cepat sumbu X: 30.000 m/menit, pergeseran cepat sumbu Y: 30.000 m/menit, pergerakan cepat sumbu Z: 30.000 m/menit, dehu1930pro Dcedpfxow Rdl Do Adgeb

Kondisi: bekas, Tahun pembuatan: 2011, DMU60: Dedpfx Ajxpt Idsdgscb 5-sumbu Spindel 18.000 rpm Majalah alat 24 posisi Penahan alat SK40 Jam spindle: 15.305 Zeroclamp 6 pot 138 (sistem penjepit titik nol) DMU100: 5-sumbu Spindel 18.000 rpm Majalah alat 32 posisi Penahan alat SK40 Jam spindle: 15.389 Zeroclamp 12 pot 138 (sistem penjepit titik nol)

Kondisi: perlu perbaikan (bekas), Tahun pembuatan: 1995, jam operasional: 18.000 h, Fungsionalitas: fungsi terbatas, jarak pergerakan sumbu X: 880 mm, jarak lintasan sumbu Y: 630 mm, jarak gerak sumbu Z: 630 mm, Perlengkapan: konveyor serpihan, For sale is a DECKEL MAHO DMU 80 T, a robust and precise 3-axis machining center with a large clamping area. The machine is still connected to power and fully functional—a test run can be arranged by appointment. However, an overhaul of the axes is required. Loading on site can be organized. Dcodpfexphdgsx Adgeb Technical data: Travel (X/Y/Z): 880 / 630 / 630 mm Table clamping surface: 1250 x 700 mm Table load capacity: 600 / 500 kg Spindle taper: SK 40 (DIN 69871) Speed range: infinitely variable 20 – 12,000 rpm Control: HEIDENHAIN TNC 426/430 Feed X/Y/Z: infinitely variable 20 – 15,000 mm/min Rapid traverse: 30 m/min Tool changer: 25 positions Tool data: Ø 80 / 130 mm | Max. length 315 mm | Max. weight 8 kg Total power requirement: 60 kW Machine weight: approx. 9.6 t Dimensions (L x W x H): 4.53 x 2.60 x 2.50 m Accessories Electronic handheld control panel Chip conveyor (screw conveyor) Coolant system ✅ Your benefits at a glance: Ready for immediate use – machine is connected and testable Solid 3-axis machining center High spindle speeds & rapid traverses for efficient machining On-site loading possible Attractive price-performance ratio Location: 69181 Leimen Fixed price: €10,000 If interested or to arrange an inspection/test run, please contact us!

Tahun pembuatan: 1996, Kondisi: baik (bekas), A used machining center by DECKEL MAHO equipped with: - MillPlus CNC control - Fixed angular table - Coolant system Dcodpfshzt Thsx Adgsb - Lighting - 25-position tool changer - Documentation Travel X/Y/Z 800/650/550 mm Spindle speed 20–6300 rpm Tool holder SK 40 For further technical data, please refer to the PDF document. Technical data and dimensions subject to change without notice.

Kondisi: bekas, Tahun pembuatan: 2004, jam operasional: 78.592 h, Fungsionalitas: berfungsi sepenuhnya, jarak pergerakan sumbu X: 630 mm, jarak lintasan sumbu Y: 560 mm, jarak gerak sumbu Z: 560 mm, jam operasional spindle: 26.290 h, Motor spindle 12.000 rpm 24 slot magazine SK40 Dsdpfxjw U Tbij Adgjcb 3D path control iTNC 530 Data teknis lebih lanjut dapat ditemukan di lampiran. Catatan: Kami menawarkan solusi pembiayaan fleksibel untuk semua mesin serta layanan pemindahan profesional. Pembongkaran, transportasi, dan pemasangan yang dilakukan secara profesional – semua dari satu sumber. Penagihan berdasarkan kondisi dan jangka waktu individu. Hubungi kami untuk penawaran pribadi Anda.

Kondisi: bekas, Tahun pembuatan: 2007, travel range x-axis: 730 mm y-axis travel: 560 mm z-axis travel: 560 mm Control: iTNC 530 Heidenhain Spindle speed range - main spindle: max. 18,000 rpm Drive power - main spindle: 10 / 15 kW Max. torque: 130 / 87 Nm Tool holder: HSK-A63 Swiveling axis NC: ° Table clamping surface: 1,000 x 600 mm T-slots: 9x 14 x 63 mm Table diameter: 600 mm Dcsdpfx Aowpw E Nedgob Rotary axis C: 360° Max. table load: 500 kg Number of tool stations: 60 positions Tool holder: HSK-A63 Total power requirement: 40 kVA Machine weight approx.: 11.0 t Space requirement approx.: 4.5 x 4.5 x 3.5 m CNC Universal Machining Center DECKEL MAHO - DMU 60 monoBLOCK - 5 axes - NC rotary table - Swivel milling head

Kondisi: bekas, Tahun pembuatan: 1998, dehu-1 Dcsdpfjw Inrvox Adgsb

Kondisi: bekas, Tahun pembuatan: 2007, jam operasional: 86.863 h, Fungsionalitas: berfungsi sepenuhnya, jarak pergerakan sumbu X: 750 mm, jarak lintasan sumbu Y: 600 mm, jarak gerak sumbu Z: 520 mm, model controller: Heidenhain iTNC530, lebar meja: 800 mm, panjang meja: 620 mm, berat keseluruhan: 9.000 kg, kecepatan spindel (min.): 18.000 rpm, jam operasional spindle: 39.186 h, jumlah slot dalam magazin alat: 60, Dijual DMU 70 EVO Linear bekas yang dalam kondisi baik Dcodpfx Aoxcnd Tedgjb

Kondisi: bekas,

Kondisi: bekas, CNC 3+2 Axis Vertical Machining Center DECKEL MAHO Type DMU 35 M CNC Control SIEMENS 810D with ShopMill Serial No. 11065353554 Year of manufacture: 2001 Travel paths: X: 350 mm, Y: 240 mm, Z: 340 mm Table movements: C-axis: 360° Swivel range: +105° / -15° Universal Swivel Rotary Table: 400 x 290 mm, center bore 30H6 Table load: max. 100 kg Distance spindle nose – table: min. 145 mm to max. 485 mm Feed rate: 5,000 mm/min Rapid traverse ( X / Y / Z ): 5 m/min Input increment: 0.01 mm Total power consumption: 15 kVA Spindle speed range: 20 - 6,300 rpm Spindle drive power: 6.3 / 10 kW (100% / 40% duty cycle) Torque: max. 55 / 80 Nm Tool holder: SK 40 DIN 69871 Pull stud: DIN 69872 or ISO 7388/2 Type B Interface: Serial RS232C, LAN (RJ45) Power supply: 400 Volt, 50 Hz, 15 kVA Compressed air connection: 6 bar - CNC control Siemens Sinumerik 810D with ShopMill V05.03.22, NCU 03.03.34-CCU1E, MMC103 - 3 axes controlled (X, Y and Z axes) - Manual swivel rotary table, C-axis = 360° table rotation, B-axis = swivel range +105° / -15° - Direct position measuring system for all 5 axes - Electronic handwheel - Spindle drive via servomotor with toothed belt and 2 gearbox stages - Fully enclosed cabin with sliding door - Swiveling control panel - Coolant nozzles on vertical head - Chip tray with coolant tank and coolant pump - Work area lighting - Documentation available Dodsvt D D Uopfx Adgecb Required space (L x W x H): 2000 x 2000 x 2100 mm Weight: 1750 kg Good condition

Kondisi: baik (bekas), Tahun pembuatan: 2011, jam operasional: 12.926 h, Fungsionalitas: berfungsi sepenuhnya, nomor mesin/kendaraan: 12160000083, jarak pergerakan sumbu X: 936 mm, jarak lintasan sumbu Y: 850 mm, jarak gerak sumbu Z: 651 mm, kecepatan rotasi (maks.): 10.000 rpm, jumlah slot dalam magazin alat: 30, No reserve price – guaranteed sale to the highest bidder! TECHNICAL DETAILS X-axis travel: 935 mm Y-axis travel: 850 mm Z-axis travel: 650 mm Dsdpfewu Em Ssx Adgjcb Table Dimensions: 1,200 x 850 mm Table load: max. 4,000 kg Spindle Spindle speed: 10,000 rpm Power: 44 kW Torque: 288 Nm Tool system Magazine capacity: 30 Tool diameter: 160 mm Tool length: 365 mm Feed rate: max. 40,000 mm/min Rapid traverse: 40 m/min MACHINE DETAILS Dimensions: 5.1 x 3.1 x 3.2 m Weight: 14.6 t Connected load: 63 kVA Operating voltage: 400 V, 50 Hz Program run time: 36,420 h Spindle hours: 12,946 h EQUIPMENT - without magnetic table

Kondisi: siap digunakan (bekas), Tahun pembuatan: 1999, Fungsionalitas: berfungsi sepenuhnya, jarak pergerakan sumbu X: 1.250 mm, jarak lintasan sumbu Y: 880 mm, jarak gerak sumbu Z: 800 mm, kecepatan spindel (maks.): 12.000 rpm, jumlah slot dalam magazin alat: 60, en Dcedpfxjxbz Snj Adgob

Kondisi: baik (bekas), Tahun pembuatan: 1997, Fungsionalitas: berfungsi sepenuhnya, nomor mesin/kendaraan: 570035, jarak pergerakan sumbu X: 710 mm, jarak lintasan sumbu Y: 520 mm, jarak gerak sumbu Z: 520 mm, gerak cepat sumbu X: 30 m/menit, pergeseran cepat sumbu Y: 30 m/menit, pergerakan cepat sumbu Z: 30 m/menit, kecepatan pemakanan sumbu X: 10 m/menit, laju pemakanan gandar Y: 10 m/menit, laju pemakanan sumbu Z: 10 m/menit, tinggi total: 3.300 mm, panjang total: 4.600 mm, lebar total: 5.500 mm, lebar meja: 500 mm, panjang meja: 700 mm, berat keseluruhan: 6.000 kg, kecepatan spindel (min.): 20 rpm, kecepatan spindel (maks.): 12.000 rpm, daya motor spindle: 25.000 W, tegangan masuk: 400 V, jenis arus masuk: tiga fasa, Perlengkapan: dokumentasi / manual, 5-axis machining center, Manufacturer: DECKEL MAHO, Model: DMU 70 V, Year of manufacture: 1996, Serial no.: 570035, Travel (X/Y/Z): 710/520/520 mm, Control: HEIDENHAIN, max. spindle speed: 12,000 rpm, 60-position tool changer, compact filter system INTERLIT SUK200/900, year of manufacture: 1997, fill capacity: 900 l, filter area: 0.2 m³, chip conveyor, internal coolant supply Dcjdporkz A Iefx Adgob Note: 1 tool changer defective

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2002, jam operasional: 37.369 h, Fungsionalitas: berfungsi sepenuhnya, nomor mesin/kendaraan: 1112.000594 3, jarak pergerakan sumbu X: 630 mm, jarak lintasan sumbu Y: 560 mm, jarak gerak sumbu Z: 560 mm, lebar meja: 1.000 mm, panjang meja: 600 mm, kecepatan rotasi (maks.): 12.000 rpm, TECHNICAL DETAILS Working Spindle Tool holder: SK 40 Work Table Clamping surface: 1,000 × 600 mm T-slot spacing: 63 mm Number/size of T-slots: 9 / 14 H7 Dsdpfewx Ekxjx Adgjcb Tool Magazine Magazine positions (2 × 12 positions): 24 pieces Tool diameter magazine 1: 130 mm Tool diameter magazine 2: 80 mm Tool length from spindle nose: 315 mm Tool weight with automatic tool change: 8 kg Total tool weight in magazine: 100 kg Main Drive Speed: 12,000 rpm Tool holder: SK 40 MACHINE DETAILS Control: Heidenhain TNC 426/430 Electrics Machine connection: 3N/PE–50/60 Hz, 400/230 V Standard power consumption: 38 A Standard power input: 26 kVA Standard fuse protection: 50 A Rated power: 35 kVA Transport Transport weight machine with tool changer: approx. 6,700 kg Transport dimensions machine (L x W x H): approx. 3.50 x 2.70 x 2.21 m EQUIPMENT Tool changer available

Kondisi: baik (bekas), Tahun pembuatan: 2004, jam operasional: 64.500 h, Fungsionalitas: berfungsi sepenuhnya, nomor mesin/kendaraan: 1505709006, jarak pergerakan sumbu X: 750 mm, jarak lintasan sumbu Y: 600 mm, jarak gerak sumbu Z: 520 mm, kecepatan rotasi (maks.): 42.000 rpm, jumlah slot dalam magazin alat: 60, sudut putar sumbu B (maks.): 180 °, Machine in good condition, inspection report available TECHNICAL DETAILS Travel X: 750 mm Travel Y: 600 mm Travel Z: 520 mm Table Clamping surface: Ø 700 × 500 mm Central/max. table load: 350 kg NC rotary-swivel table: 700 × 500 mm B-axis: 180° C-axis: 360° Dcjdpfx Aswrz Nwsdgeb Spindle Spindle speed: 42,000 rpm Tool holder: HSK E50 Spindle cooler: available Control CNC control: HEIDENHAIN iTNC 530 Electronic handwheel: available Preparation for 3D probe HEIDENHAIN TS 641: without probe BA: 4 Tool management Tool changer: 60 positions Speed Rapid traverse: 50 m/min MACHINE DETAILS Machine dimensions (L × W × H): 3,200 × 2,650 × 2,800 mm Machine weight: 9 t Total power requirement: 50 kVA Power supply: 400 V Operating hours Power-on hours: 141,300 h Spindle hours: 64,500 h Control power-on time: 146,100 h EQUIPMENT - 5-axis simultaneous HSC machining center - NC rotary-swivel table with B and C axes - Chip conveyor included - Electronic handwheel for manual operation - Laser for tool measurement - Prepared for 3D probe HEIDENHAIN TS 641 - Integrated oil mist extraction - Spindle cooling available - No internal coolant (IKZ) available

Kondisi: baik (bekas), Tahun pembuatan: 1999, jam operasional: 52.964 h, Fungsionalitas: berfungsi sepenuhnya, jarak pergerakan sumbu X: 800 mm, jarak lintasan sumbu Y: 650 mm, jarak gerak sumbu Z: 550 mm, model controller: Heidenhain MillPlus, kecepatan spindel (maks.): 12.000 rpm, No reserve price – guaranteed sale to the highest bidder! TECHNICAL DETAILS X-axis travel: 800 mm Y-axis travel: 650 mm Dcodpfx Aswnbqgedgsb Z-axis travel: 550 mm Control unit: Heidenhain MillPlus Table Table length: 1,100 mm Table width: 650 mm Maximum table load: 800 kg Feed rate X-axis: 20,000 mm/min Y-axis: 20,000 mm/min Z-axis: 20,000 mm/min Spindle Spindle taper: ISO 40 / BT / MT Spindle power: 15 kW Maximum speed: 12,000 rpm Tool changer Number of tools: 24 Number of controlled axes: 3 MACHINE DETAILS Length: 3,400 mm Width: 2,400 mm Height: 2,800 mm Weight: 8,700 kg EQUIPMENT - 4th axis - Chip conveyor - Coolant system - Electrical cabinet

Kondisi: bekas, Tahun pembuatan: 2002, x-travel 880 mm y-travel 630 mm z-travel 630 mm Clamping surface of table 1250 x 700 mm Integrated NC rotary table, 700 mm diameter Spindle taper SK 40 Spindle taper DIN 69871 Spindle speeds - stepless 20 - 12,000 rpm Control HEIDENHAIN Control TNC 430 Feed rates x/y/z - stepless 20 - 15,000 mm/min Rapid traverse 30 m/min Tool changer 32 (2 x 16) positions Tool diameter 80 / 130 mm Max. tool length 315 mm Max. tool weight 8 kg NC rotary table - max. speed 15 rpm Table load capacity 600 / 500 kg Dcodpfxstqqmbe Adgeb Milling head - swivelling + / - 12 / 90 ° Total power requirement 60 kW Machine weight approx. 9.6 t Machine dimensions L x W x H 4.53 x 2.60 x 2.50 m = 5-axis machining centre, table clamping surface 1250 x 700 mm with integrated NC rotary table (= 4th axis), programmable milling head (= 5th axis) Accessories: electronic handwheel, chip conveyor (auger conveyor), coolant system.

Tahun pembuatan: 2000, Kondisi: sangat baik (bekas), I have for sale a Deckel Maho DMU 100T Machining Centre. Control system: Heidenhain MillPlus Machine technical condition: Very good Year of manufacture: 2000 Country of origin: Germany Machine specifications: X-axis travel: 1080 mm Y-axis travel: 710 mm Z-axis travel: 710 mm Swivelling head Maximum spindle speed: 12,000 rpm Tool magazine: 32 tools (2x16 tools) High-pressure coolant Through-spindle coolant Heidenhain linear scales on all axes Dcedpolffzcjfx Adgjb Chip conveyor Central lubrication Hydraulic tool clamping Spindle taper: SK40 Complete programming manual Documentation Machine weight: 10 t Loading included in the price Stal-Com has been specialising for 17 years in the sale, servicing, and training on CNC machines from the DMG group. We specialise in all models of Gildemeister lathes and Deckel Maho Machining Centres. All our machines undergo a meticulous technical inspection. In addition to clients from Poland, our machines are purchased by customers throughout Europe and some parts of Asia. Each machine can be inspected during operation, as we also carry out machining services. Upon purchasing a machine from us, we provide personnel training and can also assist in setting up part production at your site. We cooperate long-term with many companies, supplying them with successive machine tools. Stal-Com Rafał Dziendziel

Kondisi: sangat baik (bekas), Tahun pembuatan: 2006, jam operasional: 35.319 h, Fungsionalitas: berfungsi sepenuhnya, nomor mesin/kendaraan: 11460000643, jarak pergerakan sumbu X: 1.250 mm, jarak lintasan sumbu Y: 1.000 mm, jarak gerak sumbu Z: 10.000 mm, kecepatan spindel (min.): 10 rpm, kecepatan spindel (maks.): 10.000 rpm, tegangan masuk: 400 V, jenis arus masuk: tiga fasa, 5-axis machining centre, Manufacturer: DECKEL MAHO, Model: DMU 125 P duoBLOCK, Year of manufacture: 2006, Recorded operating hours (h): 35,319, Serial No.: 11460000643, Travel paths (X/Y/Z): 1,250/1,000/1,000 mm, Max. spindle speed: 10,000 rpm, 60-position tool changer, B-axis, swivelling 190°, HEIDENHAIN Mill Plus control, internal coolant supply, tool measuring system, chip conveyor, DMG filter system, Serial No.: 13812-01560, DMG WK331 cooler unit Djdpfxerkz Tfo Adgjcb

Kondisi: siap digunakan (bekas), Number of tool positions: 25, max. spindle speed: 6300 rpm, taper: SK40 with DIN 7388 pull stud, connected load: 35 kVA, control: Deckel Maho MillPlus, operating/ spindle hours: 56,344/ 14,965 h, equipped with chip conveyor and 600 L coolant tank, without tools and clamping devices. Dodelbmtnjpfx Adgscb

Kondisi: bekas, Tahun pembuatan: 2004, Fungsionalitas: berfungsi sepenuhnya, We offer you: Universal Machining Centre Manufacturer: Deckel Maho Model: DMU 80 T Year of manufacture: 2004 Control: Heidenhain MillPlus Technical specifications: X-axis travel: 880 mm y-axis travel: 630 mm z-axis travel: 630 mm Max. spindle speed: 12,000 rpm Dedpevx Tidefx Adgecb Table size: 1,250 x 700 / ⌀ 800 mm Max. table load: 700 / 500 kg Centering bore: ⌀ 50 mm Tool holder: SK40 Tool changer: 32 (2x16) positions Max. tool diameter: 130 / 80 mm Max. tool length: 250 mm Max. tool weight: 8 kg Feed rate (x/y/z): 20 – 15,000 mm/min Rapid traverse (x/y/z): 30 m/min Machine weight: approx. 10 t Operating hours: approx. 92,738 h Spindle hours: approx. 16,096 h Technical features: - Internal coolant supply (IKZ) Accessories: - Chip conveyor - Probe Accessories, tools, and clamping devices shown are only included if specified in the additional information. Subject to changes and errors in technical data and specifications, and prior sale!

Kondisi: baik (bekas), Tahun pembuatan: 2008, jam operasional: 23.532 h, Fungsionalitas: berfungsi sepenuhnya, nomor mesin/kendaraan: 11760001053, jarak pergerakan sumbu X: 450 mm, jarak lintasan sumbu Y: 400 mm, jarak gerak sumbu Z: 480 mm, produsen pengendali: Heidenhain, model controller: iTNC 530, kecepatan rotasi (maks.): 18.000 rpm, No reserve price – guaranteed sale to the highest bidder! TECHNICAL DETAILS Working Area Travel paths: 450 mm x 400 mm x 480 mm Main Drive Motor spindle: 18,000 rpm incl. active cooling Power: 15 kW (40% duty cycle); 10 kW (100% duty cycle) Dcjdpsu Ra I Iofx Adgob 3D Control: Heidenhain iTNC 530 Tool Holder Type: SK 40 according to DIN 69871 Tool clamping: according to DIN 69872 Equipment Swivel head: controlled NC swivel milling head (B-axis) Tool changer: pick-up system, 16 magazine slots SK 40 Rotary table: NC rotary table, diameter 450 mm Chip conveyor: available Controller: 3D path control Power-on hours: 55,916 h Spindle hours: 23,532 h Please refer to the attached technical drawings (see link below). EQUIPMENT Tool changing device Chip conveyor 3D path control

Kondisi: sangat baik (bekas), Tahun pembuatan: 2000, Centrum Obróbcze Deckel Maho DMU 80T na sprzedaż – 4 osie Sterowanie: Heidenhain Stan techniczny maszyny: idealny Rok produkcji: 2000 Kraj produkcji: Niemcy Parametry techniczne: - Przejazd w osi X: 880 mm Dedpfx Ader Rp Tdegscb - Przejazd w osi Y: 650 mm - Przejazd w osi Z: 650 mm - Automatyczna skrętna głowica - Maksymalne obroty wrzeciona: 12 000 obr./min - Magazyn narzędzi: 24 szt. (2 x 12 narzędzi) - Liniały pomiarowe Heidenhain na wszystkich osiach - Chłodzenie przez wrzeciono - System chłodzenia wysokociśnieniowego - Transporter wiórów - Centralne smarowanie - Hydrauliczne mocowanie narzędzi - Stożek wrzeciona: SK40 W zestawie: - Pełna instrukcja programowania - Dokumentacja techniczna - Załadunek w cenie

Tahun pembuatan: 2005, Kondisi: siap digunakan (bekas), A CNC milling machine that has been converted to a horizontal configuration is available. Travel range X/Y/Z: 800mm/700mm/600mm, repeat accuracy: mm. Table diameter: 630mm, max. table load: 600kg, tool magazine: 60 slots, tool holder: 60, tool diameter: 100mm/160mm, tool length: 350mm, max. tool weight: 10kg, feed rate: 50m/min, rapid traverse: 50m/min. Machine dimensions X/Y/Z: approx. 6600mm/5400mm/2750mm, weight: approx. 10,200kg, control system: iTNC 530. Documentation available. On-site inspection is possible. Djdpfxsv Ampro Adgjcb