Beli Agitator Jet Terarah bekas (3.010)

Kondisi: baik (bekas), For sale is a guide beam agitator (Leitstrahlrührwerk) from Stelzer Rührwerke International GmbH, model SM460-DF. Product details: - 1455 RPM Kedpfx Afofr Icueijdk - 400V - 18.5 kW - Shaft length: 720 mm - Impeller diameter: 280 mm For further details, please refer to the nameplate (see photo).

Kondisi: bekas, For sale is a guide vane agitator from VEM Motors GmbH, model VDE 0530 T1/7.91. Agitator specifications: Kodpega D Ifjfx Afijdk RPM: 1475 Voltage: 380 V Power: 20 kW Shaft length: 800 mm Shaft diameter: 95 mm Total length: 2030 mm Impeller diameter: 450 mm Connection: DN400

Kondisi: bekas, kapasitas tangki: 6.500 l, UMUM Perlengkapan: Kepala semprot, Mata crane Konstruksi: berdiri Catatan: 1 penyok di silinder Diameter dalam: 1.940 mm Tinggi total: 3.900 mm Pengaduk: Jetmixer Tipe penopang: kaki dapat disesuaikan tingginya Kodpfx Afjxqc Uvsijdk Volume: 6.500 liter Material kontak produk: V2A 1.4301 (AISI304) Kondisi: bekas Tinggi silinder: 2.000 mm Penggunaan terakhir: industri makanan (sirup) TANGKI Jumlah kaki: 3 buah PERLENGKAPAN Lubang manusia / Dome: di silinder, di bagian atas Outlet: ujung pipa Ø sekitar 50mm Catatan: Outlet dipotong KUALITAS MATERIAL Material kaki: baja tahan karat PENGADUK 1 Posisi pengaduk: di samping silinder Perlengkapan pengaduk: Jetmixer (pipa untuk mencampur isi tangki menggunakan pompa terkait)

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2010, Fungsionalitas: berfungsi sepenuhnya, nomor mesin/kendaraan: 10071775, tinggi pusat: 150 mm, berat keseluruhan: 100 kg, kecepatan rotasi (maks.): 3.300 rpm, Tanpa harga minimum – penjualan dijamin kepada penawar tertinggi! Setiap penawaran mengikat untuk pengambilan tepat waktu, baik antara 11.05.2026 dan 13.05.2026 atau antara 18.05.2026 dan 21.05.2026! DETAIL TEKNIS Kdedpsyn Hz Njfx Afijk Kecepatan putar: dari 400 hingga 3.300 rpm Jarak antara senter: sekitar 400 mm Tinggi senter: sekitar 150 mm DETAIL MESIN Tegangan kerja: 230 V Frekuensi: 50 Hz Arus nominal: 2,5 A Daya terhubung: 0,56 kW Dimensi & Berat Dimensi (P x L x T): 850 x 300 x 440 mm Berat: 100 kg Referensi eksternal: Bengkel pelatihan – Lot 3

Kondisi: bekas, Kode: 0354 Merek: JET/USA Model: DDS 225 - Standar CE Mesin kalibrasi amplas otomatis 2-roller untuk kayu, furnitur, pertukangan, furnitur custom, panel, pertukangan kayu, plastik, dan berbagai material – Standar CE Fitur: Konstruksi kokoh Penyesuaian roller keluar secara independen dari roller masuk Lapisan karet keras pada roller Konveyor 2 kecepatan Lebar kerja 635 mm Panjang minimum benda kerja 230 mm Tinggi minimum benda kerja 0,8 mm Tinggi maksimum benda kerja 133 mm Dimensi roller 152 x 635 mm Kdsdpfxsy A Syns Afiek Kecepatan putar roller 1400 rpm Kecepatan konveyor 2–3 m/menit 2 lubang hisap dengan diameter masing-masing 100 mm Daya motor 5 Hp Basis tertutup dengan pintu Amplas grit 80 Amplas grit 100 Dimensi keseluruhan (mm): 1150 x 1150 x 1050 (t) Berat (kg): 330

Kondisi: baik (bekas), Trolley alat Facom Jet dengan 8 laci Kjdpfeyzt Nzjx Afiedk Kondisi sempurna, alat Facom. Buatan Prancis. Aksesori seperti yang terlihat di foto. Harga untuk satu set lengkap.

Kondisi: sangat baik (bekas), Tahun pembuatan: 2023, Dijual: Mesin pengamplasan silinder JET 2244 dengan motor 1,8 HP dan lebar pengamplasan maksimal 560 mm. Mesin dalam kondisi sangat baik, telah dicek dan diservis oleh tim layanan kami. Spesifikasi teknis: - Lebar pengamplasan: 560 mm (1120 mm) - Ketebalan pengamplasan: 0,8 – 102 mm - Kecepatan maju variabel: 0 – 3 m/menit - Dengan osilasi - Kecepatan drum: 1450 rpm - Dilengkapi saluran ekstraksi Ø 100 mm - Daya motor: 1,8 HP / 230 V - Tahun pembuatan: 2023 / seperti baru Mesin berada di A-5431 Kuchl dan dapat dilihat kapan saja selama jam kerja kami. Penjualan sebelumnya dapat terjadi sewaktu-waktu! Kdsdpfxjyzqtqs Afisk Istilah terkait: JET 2244, mesin pengamplasan, silinder, osilasi, pengamplas Referensi: R-L0B6O

Kondisi: baru, Massive cast iron legs for wood lathe/workbench – NEW & extremely robust For sale are 2 heavy-duty, high-quality cast iron legs, perfect as substructures for woodturning lathes, workbenches, or other machinery. The solid construction provides maximum stability and minimal vibrations – ideal for precision work. Thanks to their rugged cast iron build, these legs are virtually indestructible and suitable for professional use. Condition: - New & in original packaging - Unused, incl. accessories (see photo) Technical data: - Weight: 31 kg per leg - Height: 80 cm - Width (bottom): 50 cm - Width (top): 25 cm Kedpfxeyzd Inj Afisdk - Thickness (bottom): 10 cm - Thickness (top): 15 cm Features: - Adjustable leveling feet included → perfect compensation on uneven floors - Threaded holes on top incl. mounting bolts - Sturdy, well-designed construction with cross-bracing for extra rigidity - Individually expandable: simply mount a wooden panel or machinery top Ideally suited for: - Woodturning lathes - Heavy machinery - Workbench projects - DIY industrial-style furniture Shipping / Collection: - Collection preferred - Shipping by freight carrier possible The legs are located in A-5431 Kuchl and can be inspected during our opening hours at any time. Subject to prior sale! Related terms: cast iron machine base, lathe frame, workbench legs, industrial feet, machine feet, cast iron frame, workbench base frame, heavy-duty base feet, metal feet.

Kondisi: diremajakan ulang (bekas), Fungsionalitas: berfungsi sepenuhnya, Kami menawarkan 4 unit turbin Schlick - 320 mm, termasuk motor 7,5kW. Turbin dari Schlick ROTO-JET RB500 5.2/4/7,5 Tipe turbin - 5.2 Kapasitas abrasif - 140 kg/menit Kecepatan abrasif keluar - 70 m/detik Turbin setelah overhaul total. Mesin blasting, pelempar abrasif, sandblasting. Harga per unit - 3.000 Euro. Kdodpovphf Uefx Afiek

Kondisi: siap digunakan (bekas), Tahun pembuatan: 1999, nomor mesin/kendaraan: 9558, Used, fully functional WJS waterjet cutting system with KMT SLIV 50 HP pump and sludge removal. Kjdpfx Afji Hckrjiodk Table size: 4 x 3 meters Cutting head: 4x Abrasive Dynamic The machine is currently dismantled and cannot be inspected. Installation and commissioning will be carried out by us and are not included in the price. The machine can also be completely overhauled (new control cabinet, new control system, as well as new CE certification. This would incur an additional cost of approx. €50,000).

Kondisi: diremaj di bengkel (bekas), Tahun pembuatan: 2012, jam operasional: 1.785 h, Fungsionalitas: berfungsi sepenuhnya, berat keseluruhan: 65 kg, Mesin sandblasting dry ice dari Cold Jet dalam kondisi sangat baik. Berfungsi sempurna dan telah diuji. Tahun produksi: 2012, termasuk nosel. Perawatan dilakukan secara rutin. Hanya dapat digunakan dengan blok es kering! Kodpjyzqy Defx Afiedk

Tahun pembuatan: 2005, Kondisi: siap digunakan (bekas), de-1 Kdsdpfxjyypmgj Afijk

Kondisi: diremajakan ulang (bekas), Tahun pembuatan: 2013, Fungsionalitas: berfungsi sepenuhnya, tegangan masuk: 230 V, berat keseluruhan: 135 kg, frekuensi input: 50 Hz, daya: 0,74 kW (1,01 hp), diameter nosel ekstraksi: 100 mm, tinggi penggerindaan: 160 mm, kecepatan rotasi (maks.): 1.400 rpm, Mesin amplas spindle bekas JET JOVS-10 adalah mesin amplas yang ringkas dan serbaguna, ideal untuk pekerjaan pengamplasan presisi pada radius dalam, kontur, dan tepi. Sangat cocok untuk bengkel dan usaha kerajinan, dengan konstruksi yang kokoh, pengoperasian yang mudah, dan kinerja yang andal. Perlengkapan mesin Unit amplas spindle Berbagai selongsong amplas dan diameter spindle Kdodpfeu E Tb Rsx Afiok Meja kerja yang stabil Penggantian alat yang mudah Desain kompak Sambungan ekstraksi debu

Kondisi: bekas,

Kondisi: hampir baru (bekas), DEMONSTRATION MACHINE For sale is an as-new JET double-cylinder sanding machine DDS-237, equipped with a powerful 400V motor rated at 7.5 HP and a maximum sanding width of 940 mm. The demonstration machine is in excellent condition. Technical specifications: - Motor: 400 V / 7.5 HP - Sanding drum speed: 1,400 rpm - Feed rate: 3 m/min - Max. sanding width: 940 mm - Sanding thickness: 0.8 to 133 mm - Minimum workpiece length: 230 mm - Sanding drum size: 152 x 940 mm each - Sanding belt width: 75 mm or 100 mm - Extraction port: 2 x 100 mm diameter - Dimensions (LxWxH): 1,090 x 1,420 x 1,090 mm - Weight: 440 kg The machine is located in A-5431 Kuchl and can be inspected at any time during our business hours. Subject to prior sale! Ksdpfx Afjycc R Neijdk Forwarding shipping: Austria: €180.00 incl. VAT Germany: €210.00 incl. VAT South Tyrol: €240.00 incl. VAT Related terms: JET DDS-237, double cylinder sander, wide-belt sanding technology, wood refinement, 7.5 HP drive, 400V industrial, 940mm working width, feed system, workshop machine, professional sanding machine Reference: R-A0117

Tahun pembuatan: 2021, jam operasional: 1 h, Kondisi: seperti baru (mesin pameran), The CE100 series is an electrically driven high-pressure unit designed for operating pressures from 300 to 2000 bar and flow rates from 21 to 135 l/min. The frame consists of hot-dip galvanized sheet metal components and stainless steel side frames. Four rubber feet ensure stable positioning. A lifting eye facilitates the transport of the machine. Comparable, but not Dynajet, Falch, Hammelmann, Kamat, Kärcher, Oertzen, Uraca, Woma, etc. Available models: ----- 50 Hz - bar - l/min. CE100-300-135 CE100-500-80 CE100-1000-42 CE100-1400-28 CE100-2050-21 For 60 Hz and further versions, please refer to the data sheet or inquire directly. Kdsdpjhga N Tjfx Afiok General specifications: ----- Drive motor output: 75 kW (50Hz) / 90 kW (60Hz) Voltage: 400V (50Hz) - 440V (60Hz) Current: 81A (50Hz) - 108A (60Hz) Dimensions: 1800 mm x 1050 mm x 1400 mm Weight: 2000 kg Supplied with standard accessories.

Kondisi: baru, Tahun pembuatan: 2024, Power: 1.35 kW Speed range: 230 – 3100 rpm Number of speed steps: 9 Spindle mount: MT2 (Morse taper 2) Drilling stroke: 85 mm Kodpfx Asuix Sgofijdk Spindle reach: 140 - 540 mm Table size: 500 x 740 mm / load capacity: 250 kg Head tilt: 90° left / 45° right Column diameter: 80 mm Quick-action chuck: 1 - 16 mm Weight: 240 kg

Kondisi: hampir baru (bekas), Tahun pembuatan: 2008, jam operasional: 12 h, Fungsionalitas: berfungsi sepenuhnya, masa garansi: 12 bulan, en Cold Jet Aero 75 DX Machine - Like New Condition This machine is ideally suited for industrial cleaning applications, including heavy-duty and large-scale projects. Its advantage lies in the minimal use of new-generation electronics, making it more robust and less prone to faults. Recognized as one of the most aggressive dry ice blasting units on the market, this machine is in excellent condition. Cold Jet Aero 75 DX Dry Ice Blasting Machine – Full Equipment Package • COLD JET AERO 75 DX DRY ICE (Only 12 Operating Hours) • 1 x 20’ Blasting Hose • 1 x Cold Jet Applicator • 2 x Nozzles (NEW) Regarded as one of the best performing machines globally, the absence of complex electronics ensures unmatched reliability and cost-effective maintenance. Kdedpfx Afewg R Edeiek For further information or to schedule a viewing, please contact DrDryice. All machines are supplied with a 1-year warranty. We offer repair and maintenance services for Cold Jet machines. New Cold Jet machines also available – contact us for details. Worldwide shipping available. Keywords: Cold Jet dry ice machine for sale, used dry ice blasting machine, buy dry ice blaster, CO2 cleaning equipment for sale, industrial dry ice cleaning system, secondhand Cold Jet, Cold Jet Aero 75 DX, refurbished dry ice machine, cryogenic cleaning equipment, non-abrasive cleaning, maintenance cleaning, production line cleaning, mold cleaning without disassembly, coating removal dry ice, rust removal, electrical panel cleaning, food industry cleaning, automotive cleaning, printing press cleaning, high pressure dry ice blaster, 20 ft blasting hose, dry ice blasting gun, venturi nozzle, Kärcher Ice Blaster, ASCO Jet, Cryoblaster, ICS Dry Ice, Nozzitec, Triventek, Cryonomic, Südstrahl, White Lion, ICEsonic, industrial cleaning equipment Europe, export dry ice machine, DrDryice.

Kondisi: hampir baru (bekas), Tahun pembuatan: 2018, jam operasional: 47 h, Fungsionalitas: berfungsi sepenuhnya, fr_FR Kdodoydpy Tspfx Afisk

Kondisi: hampir baru (bekas), Tahun pembuatan: 2007, jam operasional: 151 h, Fungsionalitas: berfungsi sepenuhnya, masa garansi: 12 bulan, Coldjet Aero30-machine is als nieuw Deze machine is geschikt voor industriële reiniging, van kleinere tot zeer grote projecten. Het voordeel van deze machine is dat hij niet is uitgerust met de nieuwste generatie elektronica. Het is een van de krachtigste en meest agressieve machines op de markt. Deze machine verkeert in uitstekende staat. Cold Jet Aero 30 Droogijsstraalmachine compleet met de volgende uitrusting: COLDJET AERO 30 DROOGIJS (151 BEDRIJFSUREN) - 1 x 20’ straalslang Ksdjwg R Rmopfx Afiedk - 1 x Cold Jet applicator - 2 x nieuwe sproeiers Een van de beste droogijsstraalmachines ter wereld. Geen elektronica, dus uiterst betrouwbaar. Daarbij is het onderhoud relatief voordelig. Voor vragen of het maken van een afspraak voor een bezichtiging, neem contact op met Dr.Dryice. Alle verkochte machines komen met 1 jaar garantie. Onderhoud en reparatie van Cold Jet-machines mogelijk. Ook levering van nieuwe Cold Jet-machines – neem contact met ons op. Wereldwijde verzending mogelijk. Cold Jet droogijsmachine te koop, droogijsmachine te koop, droogijsstraalmachine te koop, droogijs straalmachine kopen, dry ice blaster for sale, dry ice blasting machine for sale, industrial dry ice blaster for sale, CO2 cleaning machine for sale, Cold Jet Aero 30 te koop, Cold Jet Aero 40FP te koop, Cold Jet Aero 40HP te koop, Cold Jet Aero 75 te koop, Cold Jet Aero 75 DX te koop, Cold Jet Aero75 DX, Cold Jet 75DX, gebruikte Cold Jet machine, tweedehands droogijsstraalmachine, Cold Jet Aero series, Cold Jet i3 MicroClean, Cold Jet E-CO2, Cold Jet SDI Select 60, Cold Jet IceRocket, Cold Jet Elite 20, Cold Jet Dry Icepress, Cold Jet pelletizer, dry ice blaster, dry ice cleaning machine, industrial dry ice cleaning system, pellet dry ice blaster, dry ice blasting equipment, cryogenic cleaning machine, CO2 blasting machine, carbon dioxide blaster, industriële reiniging, machine cleaning, onderhoudsreiniging, productielijnreiniging, matrijsreiniging zonder demontage, verfverwijdering droogijs, coatingverwijdering droogijs, roestverwijdering, brand- en roetschadereiniging, elektrische kast reiniging, cleaning voor voedingsindustrie, cleaning automotive, reiniging drukpers, 20 bar droogijsstraalmachine, hogedruk droogijs blaster, non-abrasive cleaning machine, refurbished droogijsmachine, 20 ft straalslang, droogijsstraalpistool, venturi nozzle, Kärcher Ice Blaster, Kärcher IB 7/40, Kärcher IB 15/120, ASCO Jet, Cryoblaster, ICS Dry Ice, Nozzitec, Triventek, Cryonomic, Südstrahl, White Lion dry ice blaster, ICEsonic dry ice blaster, droogijsstraalmachine Nederland, droogijsmachine Noordwijkerhout, industrial cleaning equipment Europe, export droogijsmachine, DrDryice

Kondisi: hampir baru (bekas), jam operasional: 12 h, i3 Microclean UPGRADE DX PELLET SANDERS (€2000) Kdjdexga Tzopfx Afisk Met deze machine kunt u ook losse 3mm pellets gebruiken! En uiteraard ook blokken. Zo goed als nieuw, inclusief 1 jaar garantie Compleet met slangen en straalmondstuk. De COLD JET machine is geschikt voor industriële reiniging, zowel kleine als zeer grote projecten. Het voordeel van deze machine is dat hij niet is voorzien van de nieuwste generatie elektronica. Het is een van de krachtigste machines op de markt. Deze machine verkeert in uitstekende staat. Cold Jet i3 Microclean & Dry Ice Press. Stralen compleet met de volgende uitrusting: COLD JET i3 Microclean (12 UUR GEBRUIKT) 1 x 20' straalslang 1 x Coldjet applicator 1 x nozzle Een van de beste machines ter wereld. Geen elektronica. Daarom zeer betrouwbaar en voordelig in onderhoud. Voor vragen of het plannen van een bezichtiging, neem contact op met DrDryice. Alle verkochte machines worden geleverd met 1 jaar garantie. Reparaties en onderhoud aan Cold Jet machines mogelijk. Wij leveren ook nieuwe Cold Jet machines. Neem contact met ons op. Wereldwijde verzending mogelijk. Cold Jet droogijs machine te koop, droogijs machine te koop, droogijsstraalmachine te koop, droogijs straalmachine kopen, dry ice blaster for sale, dry ice blasting machine for sale, industrial dry ice blaster for sale, CO2 cleaning machine for sale, Cold Jet Aero 30 te koop, Cold Jet Aero 40FP te koop, Cold Jet Aero 40HP te koop, Cold Jet Aero 75 te koop, Cold Jet Aero 75 DX te koop, Cold Jet Aero75 DX, Cold Jet 75DX, gebruikte Cold Jet machine, tweedehands droogijsstraalmachine, Cold Jet Aero series, Cold Jet i3 MicroClean, Cold Jet E-CO2, Cold Jet SDI Select 60, Cold Jet IceRocket, Cold Jet Elite 20, Cold Jet Dry Icepress, Cold Jet pelletizer, dry ice blaster, dry ice cleaning machine, industrial dry ice cleaning system, pellet dry ice blaster, dry ice blasting equipment, cryogenic cleaning machine, CO2 blasting machine, carbon dioxide blaster, industriële reiniging, machine cleaning, onderhoudsreiniging, productielijn reiniging, matrijsreiniging zonder demontage, verfverwijdering droogijs, coating removal dry ice, roestverwijdering, brand- en roetschade reiniging, elektrische kast reiniging, food industry cleaning, automotive cleaning, printing press cleaning, dry ice blaster 20 bar, high pressure dry ice blaster, non abrasive cleaning machine, refurbished dry ice machine, 20 ft blasting hose, dry ice blasting gun, venturi nozzle, Kärcher Ice Blaster, Kärcher IB 7/40, Kärcher IB 15/120, ASCO Jet, Cryoblaster, ICS Dry Ice, Nozzitec, Triventek, Cryonomic, Südstrahl, White Lion dry ice blaster, ICEsonic dry ice blaster, droogijsstraalmachine Nederland, droogijsmachine Noordwijkerhout, industrial cleaning equipment Europe, export dry ice machine, DrDryice

Kondisi: sangat baik (bekas), de-to-en-001 Kdodpfx Afox Sqzveisk

Kondisi: baru, Fungsionalitas: berfungsi sepenuhnya, For sale: New JET Table Saw JTS-600XL Showroom Machine at a special price! Entry-level machine with precision-ground cast iron table and sliding table for accurate cuts; tiltable saw unit! - Precision-ground cast iron table – The solid table made from high-quality cast iron ensures a flat working surface and enables accurate cuts - Sliding table – Made from anodized aluminium extruded profile (1,600 mm) - Robust rip fence – An integrated fine adjustment mechanism and guidance on a round rod make the rip fence an indispensable aid - User-friendly operation – Large cast iron handwheels ensure effortless adjustments - Outrigger table for greater flexibility – Measuring 460 × 600 mm, with a telescopic crosscut fence up to 2,200 mm, the outrigger table offers space for large-format workpieces Technical Data - Motor: 230 V / 1.5 kW - Saw blade speed: 4000 rpm - Saw blade / bore diameter: 250 / 30 mm - Saw blade tilt: 0° – 45° - Max. cutting depth at 0°: 80 mm - Max. cutting depth at 45°: 54 mm - Max. cutting width at fence: 610 mm - Table size: 800 x 350 mm - Table extension: 415 x 350 mm - Table extension right: 800 x 270 mm - Precision sliding table: 1600 x 255 mm - Max. cutting length: 1600 mm - Dimensions: 1650 x 2200 x 1100 mm - Weight: 157 kg Scope of Delivery - Sliding table 1600 x 255 mm - Circular saw blade Ø 254 x 30 x 3 mm – 36 teeth, carbide-tipped - Rip fence - Outrigger table 460 x 600 mm with telescopic crosscut fence 2200 mm - Dust extraction port Ø 100 mm Shipping Freight shipping: - Austria: €70 incl. VAT - Germany: €90 incl. VAT - South Tyrol: €130 incl. VAT You will be contacted by the carrier by phone one business day prior to delivery. The delivery time will be coordinated, and you can communicate any special requirements (access/restrictions). On delivery, the goods will be unloaded using a tail lift to the kerbside or house entrance. Kdodpfx Aoyk Abwjfijk Collection is possible at our KUCHL and SÖDING locations. After receiving your order, we will check the earliest possible pickup time and contact you. The machine can be inspected at any time during our opening hours. Subject to prior sale! Related terms: circular saw, table saw, saws, panel saw

Kondisi: diremajakan ulang (bekas), Tahun pembuatan: 2006, panjang meja: 3.500 mm, lebar meja: 1.500 mm, Water Jet Sweden NC 3515 D 5-axis Images show the current condition - Two Z-axes - 1 x 45° cutting head, 1 x 2D - Control system will be renewed - Will be sandblasted and repainted - Pump optionally available - Available 12-16 weeks after order Kdsdpfx Aonab Rzsfijk Special features: - Can be individually customized to customer requirements - 12 months or 2,000 operating hours warranty (excluding spare and wear parts) We offer a discount when signing a maintenance or service contract! Contact us for your tailor-made offer!

Kondisi: baik (bekas), Tahun pembuatan: 2002, Fungsionalitas: berfungsi sepenuhnya, Mesin Pemotong Jet Air IR Produsen: WATER JET Ingersol Rand Model: OEM 30 S/N: 0211141 Tahun pembuatan: 2002 Kontrol: TH 2030 baru dan belum pernah digunakan Pompa telah direkondisi total Kodpfxoyrfg Ee Afijdk Area kerja: 3000 x 1500 mm Tekanan kerja maksimum: 60 KSPI Tegangan operasi: 400 V Tegangan kontrol: 24 V Sekring utama: 63 A Arus nominal: 55 A Frekuensi: 50 Hz