Beli Mesin pengukur koordinat bekas (381)

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2021, jam operasional: 20 h, Fungsionalitas: berfungsi sepenuhnya, nomor mesin/kendaraan: SK02UXKP0365, rentang pengukuran sumbu X: 550 mm, rentang pengukuran sumbu Y: 600 mm, Lelang Zeiss T-Scan Hawk dengan hanya 20 jam operasional! DETAIL TEKNIS Rentang pengukuran maks.: 550 mm x 600 mm Akurasi pengukuran: 0,02 mm + 0,035 mm/m DETAIL MESIN Kelas laser: Kelas 2M (Aman untuk Mata) sesuai IEC 60825-1:2014 Isdpsx Sqfnefx Aa Njtb Jam operasional: 20 PERLENGKAPAN Notebook Perangkat lunak GOM Inspect

Kondisi: hampir baru (bekas), Tahun pembuatan: 2025, Fungsionalitas: berfungsi sepenuhnya, model controller: DC241 EEC, tinggi benda kerja (maks.): 3 mm, sudut putar sumbu A (maks.): 105 °, sudut putar sumbu B (maks.): 180 °, As-new Hexagon Global S Blue Coordinate Measuring Machine! TECHNICAL DETAILS Probe Interface (CMM): TKJ Probe Weight: 350 g Weight: 480 g Measuring Performance Touch Force: 5 µm Measuring Range: 2 mm Maximum Measuring Distance: 14 mm Resolution in Z-axis: 66 nm Lateral Resolution: 6 µm Angular Acceptance: ±30° Max. Measurable Thickness: 3 mm Spot Diameter: 12 µm LED Area Light Illuminated Area: 780 × 780 mm Overall Dimensions: approx. 860 × 840 × 20 mm Weight: approx. 19 kg Load Capacity: max. 50 kg Stylus Shank Diameter: 3 mm Shank Length: 50 mm Ruby Ball Diameter: 5 mm Thread: M3 Angular Rotation Steps: 2.5° A-Axis: ±105° B-Axis: ±180° Rotational Speed: 90° in 2.5 s Max. Extension Length: 450 mm Recommended Drive Torque: max. 1.4 Nm Positioning Repeatability: 0.5 µm at 100 mm from center of A-axis rotation MACHINE DETAILS Control System: DC241 EEC Control Compatibility: HH-C-V2.0, HH-CA-V2.0 with HR-R automatic probe changer rack Electrical Data Supply Voltage: DC 5 V to 6 V Normal Current Consumption: 50 mA Min. Current Consumption: 30 mA Max. Current Consumption: 150 mA (pulsed) Protection Rating: IP40 (IEC 60529) Temperature Range: 16°C to 26°C EQUIPMENT WIN 10 operating system Interactive 3D graphics functionality Computer-simulated measuring machine environment Bidirectional connection to CAD systems IGES, VDA, DXF, and STEP Processing of 2D, 3D, wireframe and surface models Curve (CurveAnalyzer) and surface scanning Incl. PC-DMIS-SHEETMETAL Functions for measuring thin-walled components Automatic white light sensor head – TKJ 2.5 HP-OW-2.14 sensor kit, including controller, reference sphere Ø 30 mm, matte ceramic HP-SX1H scanning probe sensor LED area light for mounting on the coordinate measuring machine Reference price mechanical frame for area light support HP-CTS5.10 optical sensor HP-S-X1C/H stylus adapter (1× M3) HH-C-V2.1 controller HR-OW-2.14 short end cap HR-R3 sensor acceleration HH-CA-V2.0 interface Active probe rack, HR-RA-65 Isdpfox Sx Nusx Aa Nstb HR-X1-3P stylus rack Reference sphere, Ø 60 mm, ceramic, with stand M3 stylus (R-5-SS-3.50) Stylus tray Computer & Software PC-DMIS CAD++ PC-DMIS Operator Interface in conjunction with system order PC-DMIS CWS Interface PC-DMIS probe change support software PC-DMIS Vision for tactile sensors Touchscreen including computer system Table for computer system

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2001, Fungsionalitas: berfungsi sepenuhnya, nomor mesin/kendaraan: 1104104, rentang pengukuran sumbu X: 1.205 mm, rentang pengukuran sumbu Y: 2.005 mm, rentang pengukuran sumbu Z: 1.005 mm, berat benda kerja (maks.): 2.000 kg, tinggi benda kerja (maks.): 1.115 mm, The measuring table has been supplemented by milled aluminum plates. These plates are equipped with M6 threaded holes in a 50 mm grid, enabling flexible clamping options for workpieces. TECHNICAL DETAILS Measuring range X-axis: 1,205 mm Measuring range Y-axis: 2,005 mm Measuring range Z-axis: 1,005 mm Drive speed in CNC mode Traverse speed: 8–250 mm/s Measuring speed: 1–3 mm/s Drive speed in J/S mode High speed: 0–80 mm/s Low speed: 0–3 mm/s Fine speed: 0.05 mm/s Acceleration Acceleration per axis: 0.1 G Max. acceleration: 0.17 G Resolution: 0.0001 mm Measuring table Material: Granite Working area: 1,408 mm x 2,980 mm Clamping thread: M8 x 1.25 Max. workpiece height: 1,115 mm Max. workpiece weight: 2,000 kg MACHINE DETAILS Dimensions & Weight Dimensions main unit (D x W x H): 3,230 x 2,150 x 3,585 mm Weight (incl. stand and controller): 5,388 kg Compressed air supply Air pressure: 0.4 MPa Air consumption, normal operation: 100 L/min Air consumption, air supply: 150 L/min Temperature conditions Ambient temperature: 16–26 °C Thermal fluctuation per hour: 2.0 K Thermal fluctuation per day: 5.0 K Vertical thermal gradient: 1.0 K/m Horizontal thermal gradient: 1.0 K/m Accuracy Accuracy ISO 10360-2: E = 4.9 + 5L/1,000 Probing error Itjdex U Sv Hjpfx Aa Nob Probing error ISO 10360-2 (TP2): R = 5.2 µm Probing error ISO 10360-2 (TP200): R = 5.0 µm EQUIPMENT Software: Geopack Cosmos 2.3 Probe head: PH 10 TP 200 Change rack Note: The machine was in operation until 2013 and was then professionally disassembled by the manufacturer. Afterwards, it was stored in an industrial hall. The regular factory calibration was last performed in 2013. The calibration certificate can be viewed as an attachment in the listing.

Kondisi: bekas, Fungsionalitas: berfungsi sepenuhnya, 1 Iedpfsyamwnox Aa Notb

Kondisi: sangat baik (bekas), • Basis aluminium yang kuat dan stabil • Dua rel pemandu untuk pergeseran yang mulus • Layar LCD dengan tampilan yang jelas • Fungsi: ON/OFF, ZERO, HOLD, PRESET • Kualitas asli “Made in Japan” • Nomor seri terbaca – jaminan keaslian • Kondisi sangat baik – alat bekas, sudah diuji Itodpfxsw Rdt Ie Aa Neb • Tidak ada kelonggaran, pengukuran akurat dan konsisten • Siap digunakan – tidak memerlukan aksesori tambahan Alat yang sangat baik untuk bengkel, bagian perkakas, divisi kontrol kualitas, dan pengukuran presisi.

Kondisi: sangat baik (bekas), – Sensor Mitutoyo model 513 454 – Akurasi 0,01 mm – Tipe lever (tuas) – Versi antimagnetik – Made in Japan – Basis magnetik Mitutoyo – model 7011SN – Pengunci ON OFF – Kokoh, stabil, dengan mekanisme pengunci yang presisi – Made in Brazil Itsdsw Rdi Ajpfx Aa Neb – Set sepenuhnya berfungsi. Pengarahan stabil dan pembacaan yang akurat. – Ideal untuk pengaturan alat, pemeriksaan runout, dan pengukuran kontrol.

Kondisi: baik (bekas), For sale: depth gauge from renowned manufacturer Mahr EX 30. Condition: very good. Iedpfx Aou Swkcoa Netb

Kondisi: sangat baik (bekas), Fungsionalitas: berfungsi sepenuhnya, • Hexagon lengan pengukur dengan penutup pelindung dan kotak transportasi plastik • Meja dengan lubang kisi dan rak bawah dengan laci Isdpex Tvf Ajfx Aa Notb

Kondisi: diremaj di bengkel (bekas), Tahun pembuatan: 2011, Fungsionalitas: berfungsi sepenuhnya, rentang pengukuran sumbu X: 300 mm, rentang pengukuran sumbu Y: 200 mm, rentang pengukuran sumbu Z: 150 mm, berat benda kerja (maks.): 16 kg, tinggi total: 1.500 mm, jenis arus masuk: AC (pendingin udara), lebar total: 800 mm, panjang total: 850 mm, jarak pergerakan sumbu X: 300 mm, jarak lintasan sumbu Y: 200 mm, jarak gerak sumbu Z: 150 mm, berat keseluruhan: 77 kg, tegangan masuk: 230 V, tahun perombakan terakhir: 2023, suhu lingkungan (maks.): 30 °C, Perlengkapan: Pelat tipe tersedia, dokumentasi / manual, CNC-controlled measuring machine for automatic optical-tactile measurements using camera and 3D probe. Includes change table and 2 SF modules. PC-DMIS CAD V13 with Step/Dxf programming capability. Ijdsq T R Rhepfx Aa Notb

Kondisi: sangat baik (bekas), Tahun pembuatan: 2008, Fungsionalitas: berfungsi sepenuhnya, nomor mesin/kendaraan: 139437, rentang pengukuran sumbu X: 500 mm, rentang pengukuran sumbu Y: 500 mm, rentang pengukuran sumbu Z: 500 mm, jenis arus masuk: AC (pendingin udara), tegangan masuk: 230 V, sambungan udara terkompresi: 5 batang, tahun perombakan terakhir: 2025, suhu lingkungan (maks.): 35 °C, suhu lingkungan (min.): 13 °C, suhu: 20 °C, tekanan: 4 batang, Perlengkapan: Pelat tipe tersedia, dokumentasi / manual, en Itodpfjx Tg Tkex Aa Neb

Kondisi: bekas, Tahun pembuatan: 2024, produsen pengendali: Sonstige, Beschreibung: Allgemein: Baujahr:2024 Verfahrweg X/Y/Z:800/ 1.500/700 mm Tischbelastung max.:800 kg Messgenauigkeit:0,0005 mm Itodpfx Aoxv Nkuea Neb Wiederholgenauigkeit:0,002 mm Tastsystem:Renishaw PH 10M Plus

Kondisi: sangat baik (bekas), Tahun pembuatan: 1966, Zeiss measuring microscope, type WMM 150/75, year of manufacture 1966. It is used for measuring workpieces of all kinds, particularly gauges such as forms, thread gauges, templates, etc. Right angles x + y and polar coordinates x or y. Its measuring range is 150 x 75 mm. Includes operating manual and accessories. Itsdpfx Aaet T Uavj Nob

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2017, Fungsionalitas: berfungsi sepenuhnya, nomor mesin/kendaraan: SVC5003396, rentang pengukuran sumbu X: 500 mm, rentang pengukuran sumbu Y: 450 mm, rentang pengukuran sumbu Z: 300 mm, Perlengkapan: dokumentasi / manual, Mesin telah diservis oleh produsen pada Agustus 2022! DETAIL TEKNIS Rentang pengukuran sumbu X: 500 mm Rentang pengukuran sumbu Y: 450 mm Rentang pengukuran sumbu Z: 300 mm Total rentang pengukuran: 500 x 450 x 140 mm PERLENGKAPAN Dokumentasi / Buku manual Bola kalibrasi Berbagai perpanjangan probe Sistem pergantian probe 3-kali Renishaw Itedpfx Ajyaq Hysa Nob Bagian pelatihan ZONE3 Perangkat lunak metrologi

Kondisi: siap digunakan (bekas), trad001 Ijdpfx Aasxzn E Ue Njtb

Kondisi: hampir baru (bekas), Tahun pembuatan: 2022, Fungsionalitas: berfungsi sepenuhnya, rentang pengukuran sumbu X: 300 mm, rentang pengukuran sumbu Y: 200 mm, rentang pengukuran sumbu Z: 200 mm, Perlengkapan: Pelat tipe tersedia, Termasuk panel kontrol, PC kontrol, dan perangkat lunak seperti yang terlihat pada gambar. EXW - pengambilan sendiri di lokasi. Perusahaan pembeli harus menandatangani kontrak pembelian dan mengungkapkan/mengonfirmasi pemilik manfaat ekonomisnya. Selain itu, pihak yang menandatangani harus melakukan verifikasi Postident. Itodpeyam S Sofx Aa Njb

Kondisi: baru, Tahun pembuatan: 2025, Fungsionalitas: berfungsi sepenuhnya, en Itedpfx Aasvwa Uqs Neb

Kondisi: baru, Tahun pembuatan: 2025, Fungsionalitas: berfungsi sepenuhnya, The Azimuth CNC coordinate measuring machine (CMM) by Aberlink is the largest model in our range, embodying over twenty years of experience and excellence in the development of innovative metrology systems. It is specifically designed for the precise measurement of large and heavy workpieces weighing up to 6,000 kg. The revolutionary bridge construction incorporates aluminum honeycomb core panels, originally developed for Formula 1 and aerospace applications. This design offers a remarkable stiffness-to-weight ratio, enhancing both the performance and speed of the Azimuth. With measuring ranges of X 1200 mm, Y 2000 or 3000 mm, and Z 1000 mm, and a volumetric accuracy of up to (2.6 + L/250) µm, the Azimuth ensures the highest precision. The scale resolution is 0.1 µm. A specially developed load plate system allows heavy components to be placed directly on the granite base, with the load transferred straight to the floor without affecting metrological performance. The user-friendly Aberlink 3D measurement software offers a short learning curve, enabling precise measurements to be conducted even without prior knowledge. Free software updates ensure that the system always remains up to date. Itedpfjvwbabsx Aa Njb

Kondisi: baru, Tahun pembuatan: 2025, Fungsionalitas: berfungsi sepenuhnya, Extol – Coordinate Measuring Machine by Aberlink Extol is Aberlink’s coordinate measuring machine, engineered for precise measurement processes in industrial applications. This machine stands out due to its high measurement accuracy and robust construction, making it ideal for demanding manufacturing and quality control operations. Key Features: High Precision: Extol delivers precise measurement results, supporting reliable quality assurance. Ijdpfxevwa Scs Aa Njtb Robust Construction: With its durable build, Extol is perfectly suited for continuous industrial use. Easy Integration: The machine can be seamlessly integrated into existing production workflows, optimizing your manufacturing processes. Choose Extol by Aberlink – for precise, reliable, and efficient measurement technology in your production.

Kondisi: baru, Tahun pembuatan: 2025, Fungsionalitas: berfungsi sepenuhnya, The Horizon CNC coordinate measuring machine (CMM) from Aberlink sets new standards in metrology by utilizing frictionless linear drives, ensuring fast, consistent, and silent movements. This technology minimizes wear and increases reliability, resulting in reduced maintenance requirements. The granite base and granite Y-axis rail take full advantage of the material’s thermal stability to guarantee precise measurements. Itodpfxsvwa Uds Aa Neb The Horizon CMM is available in various sizes, offering travel ranges of X 800 mm, Y 1000 or 1600 mm, and Z 600 mm, making it suitable for different measuring tasks. The volumetric accuracy is (1.8 + L/350) µm with the TP20 probe, (1.7 + L/350) µm with the TP200 probe, and (1.5 + L/350) µm with the SP25M scanning probe. The scale resolution is 0.1 µm. Thanks to the user-friendly Aberlink 3D measurement software, training time is minimal, allowing precise measurements to be performed even without prior experience. Free software updates ensure the system always remains up to date.

Kondisi: baru, Tahun pembuatan: 2025, Fungsionalitas: berfungsi sepenuhnya, rentang pengukuran sumbu X: 280 mm, rentang pengukuran sumbu Y: 280 mm, rentang pengukuran sumbu Z: 150 mm, Discover the Fulcrum, an intuitive coordinate measuring machine that sets new standards in industrial metrology. This innovative measurement system impresses with its accuracy, user-friendly operation, and robust construction—ideal for demanding applications in manufacturing and quality control. Your benefits at a glance: Robust & Reliable: The Fulcrum is engineered for industrial use and withstands even the harshest production environments—ensuring continuous, dependable performance. Easy Integration & Intuitive Operation: Thanks to a user-friendly interface, the Fulcrum can be seamlessly integrated into existing production processes. Increased Efficiency & Time Savings: With rapid measurement cycles and automated data analysis, you can optimize your production workflows and boost your competitiveness. Future-proof & Innovative: Itedpfxjvwa Rle Aa Neb With regular software updates and state-of-the-art hardware, you are investing in a solution that continuously adapts to technological advancements and sustainably enhances your processes. Rely on the Fulcrum to elevate your quality assurance to the next level and optimize your manufacturing processes. Whether for single components or series production, this coordinate measuring machine is your key to greater precision and efficiency in production. See for yourself: Discover how the Fulcrum can revolutionize your production processes. Contact us today for a personal consultation and embark on a future filled with innovation and quality!

Kondisi: seperti baru (mesin pameran), Tahun pembuatan: 2021, rentang pengukuran sumbu X: 500 mm, rentang pengukuran sumbu Y: 500 mm, rentang pengukuran sumbu Z: 300 mm, Perlengkapan: dokumentasi / manual, pencahayaan, AIM coordinate measuring centers are the technological successors of the globally deployed Mahr multisensor coordinate measuring machines. Technical data: Measuring range: 500 x 500 x 300 mm Dimensions: 1520 x 1040 x 2040 mm Weight: approx. 1,200 kg Max. workpiece weight: on glass plate approx. 40 kg Accuracies: U1=1.9 + L/200 U2=2.4 + L/150 U3=2.9 + L/100 (L= measuring length in mm) Higher accuracy available on request Travel speed: 200 mm/s Acceleration: 400 mm/s² Scale resolution: 0.0001 mm Multisensor unit (MSH): optical/tactile/laser -Includes high-precision USB camera with 2-step zoom and telecentric optical path -Includes PTL01 TTL point laser, high-precision, telecentrically coupled -Includes Renishaw TP200 integrated tactile probing system, expandable as an option -Includes Quad-Light LED power ring light, programmable incident light -Includes LED power transmitted light -Includes Nikon precision lens 5x (optionally 3x, 10x, 20x, 50x) C-mount technology -Includes calibration standard with factory calibration certificate, consisting of glass plate “circle,” calibration sphere, and setting ring -State-of-the-art PT200 CNC controller system in a robust industrial-grade control cabinet -PCI-BUS system for fast internal data transfer during real-time operation -19" pull-out controller rack for optimal service access -Modular controller design, open for future upgrades and retrofits -Service-optimized controller layout for quick access and short service times -Integrated 64-bit broadband bus technology with real-time data transfer -4-channel online temperature compensation preparation “on board” Itedpeg Ewk Rofx Aa Nob -Active safety technology for drives, light management, and sensor systems -Online remote connection for remote maintenance and online system checks -LS circuit breakers for rapid troubleshooting during service -Firmware adaptation for volumetric 3D full error compensation Includes powerful OptiCheck3D 5.0 software Commissioning, training and start-up support (programming) available as a special package!

Kondisi: diremajakan ulang (bekas), Tahun pembuatan: 2025, jam operasional: 20 h, Fungsionalitas: berfungsi sepenuhnya, rentang pengukuran sumbu X: 1.000 mm, rentang pengukuran sumbu Y: 1.000 mm, rentang pengukuran sumbu Z: 350 mm, berat benda kerja (maks.): 50 kg, masa garansi: 12 bulan, tinggi total: 1.950 mm, jenis arus masuk: AC (pendingin udara), lebar total: 1.900 mm, panjang total: 2.020 mm, jarak pergerakan sumbu X: 1.000 mm, jarak lintasan sumbu Y: 1.000 mm, jarak gerak sumbu Z: 350 mm, berat keseluruhan: 5.800 kg, tegangan masuk: 230 V, sambungan udara terkompresi: 6 batang, tahun perombakan terakhir: 2025, Perlengkapan: Pelat tipe tersedia, dokumentasi / manual, pencahayaan, Reference Measuring Device Mahr OMS 1000 Multisensor The all-round measuring center for the broadest range of components or pallet measurements Factory-refurbished premium multisensor measuring center with warranty and guarantee, rebuilt 2025. Includes the latest software update, 18-month free software update service, free lifetime software hotline and user support. Delivery with factory service or by forwarding agent, worldwide. Online or optionally on-site demos with customer parts, application-specific consultation by accredited Profitech metrology labs during project planning. Full service available: – Delivery, installation, commissioning, accuracy acceptance according to standards, certification and comprehensive acceptance documentation. Customized training programs also available as online courses. Rental, rent-to-own, or direct financing through Profitech without a financial institution possible. Measuring system can be configured individually for customer requirements. Measuring accuracy: E1= 1.3 + L/400µm E2= 0.9 + L/600µm E3= 2.2 + L/300µm Measuring range: approx. 1000x1000x350 mm Including optical sensor (camera & laser) Renishaw TP200 touch probe system incl. standard force module CNC control incl. manual control panel Itedpexbpgtjfx Aa Nob 27" flat screen monitor Evaluation station incl. Windows 10 operating system (Windows 11 available on request) New Opticheck 3D 5.0 software Active (pneumatic) vibration damping for measurements near the production line Optical sensor: • Pure grayscale image processing • Fast digital image processor • Automatic feature and edge filter • Error documentation by program-controlled video image saving • Multifunctional multi-window technique • White, telecentric transmitted light • Coaxial incident light • 3D multisensor head Laser sensor: Ready for laser autofocus. Software-based intensity control for adaptation to different materials. Software: • Full version WITHOUT subscription model or maintenance contract • User-friendly, interactive programming • Symbolic representation of program structure • Multitasking enables parallel measurement and evaluation • Powerful base editor for customer-specific programs • Automatic sensor calibration • Geometric elements: point, line, circle (circumscribed, least squares, and enclosing), ellipse, plane, cylinder, cone, sphere • Geometric functions: intersection, distance, angle, perpendicularity, symmetry • Form & positional tolerances: straightness, roundness, flatness, cylindricity, parallelism, perpendicularity, inclination, position, symmetry, concentricity, runout, total runout, flatness, total flatness • Maximum material condition (MMC) • Current tolerance tables for common DIN standards • Software module for creating any plant-specific tolerance tables

Kondisi: baru, Tahun pembuatan: 2018, NEW MACHINE at special price Tactile Coordinate Measuring Machine from Innometrik Measuring range: 1200 x 3000 x 1000 mm Maximum workpiece weight: 1000 kg Accuracy MPEE: 2.2 + L / 350 (in µm) Scale resolution: 0.1 / 0.5 µm - Air bearings on all axes Linear speed: 300 mm/s Volumetric speed: 520 mm/s Probe system: Renishaw TP200 incl. 3 modules (SF, HF, LF) and 3-fold probe changer Itsdsdyl H Nopfx Aa Nsb Software: OptiCheck 4.5 & Virtual DMIS (separate partitions); alternatively Polyworks available as per customer requirement -Incl. PC (Windows 7), alternatively Windows 10 -Incl. 2 monitors -Incl. mouse/keyboard Image: Sister machine

Kondisi: diremaj di bengkel (bekas), Tahun pembuatan: 2025, jam operasional: 16 h, Fungsionalitas: berfungsi sepenuhnya, rentang pengukuran sumbu X: 400 mm, rentang pengukuran sumbu Y: 400 mm, rentang pengukuran sumbu Z: 300 mm, masa garansi: 12 bulan, jarak pergerakan sumbu X: 400 mm, jarak lintasan sumbu Y: 400 mm, jarak gerak sumbu Z: 300 mm, tegangan masuk: 230 V, tahun perombakan terakhir: 2024, Perlengkapan: Pelat tipe tersedia, dokumentasi / manual, pencahayaan, de-fi Iedpjd Ah Nxjfx Aa Netb

Kondisi: diremajakan ulang (bekas), Tahun pembuatan: 2025, jam operasional: 20 h, Fungsionalitas: berfungsi sepenuhnya, rentang pengukuran sumbu X: 600 mm, rentang pengukuran sumbu Y: 600 mm, rentang pengukuran sumbu Z: 350 mm, berat benda kerja (maks.): 25 kg, masa garansi: 12 bulan, jenis arus masuk: AC (pendingin udara), jarak pergerakan sumbu X: 600 mm, jarak lintasan sumbu Y: 600 mm, jarak gerak sumbu Z: 350 mm, sambungan udara terkompresi: 5 batang, Perlengkapan: Pelat tipe tersedia, dokumentasi / manual, pencahayaan, h2-en-20240617-001 Itsdpodz Szvofx Aa Njb