Used Fishing Net for sale (17,047)

Year of construction: 1991, condition: good (used), Used progressing cavity pump Manufacturer: Netzsch Nljdpfxoilpvte Ah Uok Type: NE60B Machine number: 224898 Year of construction: 1991 Dimensions: L 2500xW 400xH600 mm

Condition: new, Year of construction: 2025, Overbelt magnetic separator, magnetic tape, overbelt magnet, magnet separator, metal detection, demetallization plant Our all-round talent - overbelt magnetic separator is for sale Permanent overbelt magnetic separator TYPE PEM1200 1200x550x200mm ===== 4x ring screw for suspension PU conveyor belt endless GB30 black matt Magnet dimensions: 700x230x120mm 7 x T20 studs high-frequency welded High-quality triple aluminum construction Inner bearing lubrication for 10,000 operating hours. Degree of protection: IP-55 Nedpfshupkmox Ah Uolk 0.18 KW three-phase gear motor GEMOTEG 2 pcs. side protection plates V4A Magnetic core encased in soft iron, so that a very high permeability can be guaranteed. Underbody tightly closed and sealed with stainless steel plate and pole pieces.

Condition: good (used), functionality: fully functional, Magnetic drum for sorting magnetic parts Nsdpjwigquofx Ah Uslk

Condition: like new (used), Year of construction: 2009, functionality: fully functional, machine/vehicle number: 01096472, cooling capacity: 3.76 kW (5.11 HP), type of cooling: water, operating temperature: 5 °C, Equipment: cooling unit, FOCS-W-1502 with 2X BITZER CSH7571-70CVY-40P along with 4X GRUNDFOS NBE.NKE circulators including controller with DECS cooling tower. The price is per piece, there are three available. Njdoul T U Aepfx Ah Ujlk

Condition: new, Year of construction: 2019, functionality: fully functional, cooling capacity: 18.7 kW (25.42 HP), type of cooling: air, overall weight: 205 kg, total width: 570 mm, total length: 1,450 mm, total height: 1,200 mm, warranty duration: 6 months, heating capacity: 21.7 kW (29.50 HP), Aircooled chiller/Heat pump Climaveneta I-BX-N 020T HANNV 18.7 kW/21.7 kW Cooling capacity: 18.7 kW / 5.32 tons (12/7 — 35°C) Heating capacity: 21.7 kW / 6.17 tons (40/45 —7°C) Year of manufacture: 2019 Options: Heat pump. Hydraulic module. Refrigerant circuit: 1 pcs. Heat exchanger: Plate Condenser: Copper / Aluminum Compressors: 1 pcs. Mitsubishi DNB36FAEMT (scroll, inverter) Type of refrigerant: R410а Number of fans: 1 pcs. (Frequency inverter) Hydraulic module: 1 pcs. water pump Wilo Yonos PARA HF 25/10, expansion vessel, buffer tank. Dimensions: 1.45x0.57x1.2 m Njdpexw U I Ijfx Ah Uolk Weight: 205 kg Working hours: 0 h. Condition: New

Condition: excellent (used), Year of construction: 1991, operating hours: 500 h, functionality: fully functional, machine/vehicle number: 910177, type of input current: AC, throat depth: 400 mm, nominal power at 50% duty cycle: 15 kVA, input voltage: 380 V, type of cooling: water, overall weight: 120 kg, welding power (max.): 31 kVA, total width: 300 mm, total height: 1,250 mm, total length: 900 mm, stroke length: 35 mm, electrical fuse: 25 A, sheet thickness steel (max.): 3 mm, sheet thickness aluminum (max.): 3 mm, sheet thickness brass (max.): 2 mm, Spot Welding Machine KLT 116 CEA Costruzioni Elettromeccaniche Annettoni S.p.A. (Italy) Rated power at 50% duty cycle: 15 kVA Maximum welding power: 30.6 kVA Secondary short-circuit current: 11.4 kA Maximum sheet thickness steel: 3 + 3 mm Maximum sheet thickness aluminium: 3 + 3 mm Maximum sheet thickness brass: 2 + 2 mm Adjustable welding time and current Maximum welding time: 2 seconds Electrode stroke: 35 mm Electrode holder: Ø 21 mm Electrodes: Ø 16 mm, taper mounting 1:10 Throat depth: 400 mm Lower arm height adjustable Arm spacing: 162-415 mm Arm diameter: Ø 40 mm Foot pedal, mechanical Electrode force: adjustable, max. 160 daN Mains connection: 3-phase 400 V / 25 A Water cooling connection prepared (3 l/min at 3 bar) 15 electrodes and 3 mounting blocks included Machine weight: 120 kg Width: 300 mm Nodpjxuh Upjfx Ah Ujlk Length: 900 mm Height: 1250 mm

Condition: used, Plant: Chamber filter press used Type: Netzsch Filter plate format: 1200x1200 Number of plates: 74 pieces Filter plates: PP Filter cloths: optionally available in coordination with the medium Filter area: approx. 204 m2 Press capacity: approx. 2719 dm3 Njdpjt Ay Svsfx Ah Uelk Filter pressure: approx. 15 bar Pump technology: optional Dimensions L 8933x W 2240 x H 1900 mm Purchase or hire: Viewing of the systems by arrangement at our factory.

Condition: as good as new (ex-display), Year of construction: 2025, Complete solution for transporting bulk goods such as shredded goods, wood chips, wood pellets, granulate, etc. Aluminum angled conveyor incl. substructure horizontal range 2,500mm (adjustable) Rising range 5,000mm (customizable) Angle in the bend 35,40 or 45° Feed height: horizontal (individual) Discharge height individually adjustable Construction: height adjustable ( to move) Conveyor belt width 500mm (customizable) We supply our conveyor belts in PVC, PU, felt or rubber. Nlodpfsi Igdfox Ah Usk PU conveyor belt including cleats and corrugated edge Drive: Motor 1.1KW (adjustable), speed approx. 0.3m/sec Connection 220/240V, 50Hz protection class IP54 Drive etc. ready for connection, motor control optional 8x adjustable machine feet for alignment Wavy edge: 50x25mm T-50 lugs - 400mm pitch 2-layer particularly laterally stable Fixed overbelt magnetic separator: Permanent overbelt magnetic separator TYPE PM1200 Manufacturer: magnetprofis GmbH & Co. KG L x W x H: 1200 x 550 x 200mm Magnetic L: 700mm W: 250mm Gear motor: 0.37KW We always have various systems of this type in stock. The delivery time for an individual system is currently around 2-3 weeks, depending on the manufacturing effort. Our core competence lies in supplying the customer with exactly what he really needs. Together with our customers, we work out customer-specific, individual solutions and supply corresponding systems from our own production. Feel free to contact us by phone to find a suitable solution for your application. Conveyor belt, conveyor belt system, discharge belts, belt conveyor, magnetic separator, overbelt magnetic separator, recycling, wood chips, plastic, metal-free metal detection, neodymium, overbelt magnet, magnetic belt separator

Year of construction: 2012, condition: ready for operation (used), A Climaveneta chiller is available. Cooling capacity: 73.8kW, power consumption: 27.6kW, compressors: 2, refrigeration circuits: 1, refrigerant: R410A, refrigerant charge: 10.2kg, heat recovery: cooling capacity 76.6kW/heating capacity 23.3kW. Machine dimensions X/Y/Z: approx. 2200mm/1150mm/1450mm, weight: approx. 680kg. Documentation available. An on-site inspection is possible. Nodpjxc Nh Tsfx Ah Uslk

Condition: good (used), Year of construction: 2007, Electric magnetic chuck including electronic pole reversal control unit, Njdpfjlbggtex Ah Uslk control unit and keypad complete Please contact us if you are interested !

Condition: new, Year of construction: 2018, functionality: fully functional, cooling capacity: 14.7 kW (19.99 HP), type of cooling: air, overall weight: 180 kg, total width: 570 mm, total length: 1,450 mm, total height: 1,200 mm, warranty duration: 6 months, heating capacity: 17.2 kW (23.39 HP), Aircooled chiller/Heat pump CLIMAVENETA I BX N 015T HANRV 14.7 kW/17.2 kW Cooling capacity: 14.7 kW / 4.18 tons (12/7 — 35°C) Heating capacity: 17.2 kW / 4.89 tons (40/45 —7°C) Year of manufacture: 2018 Options: Heat pump. Hydraulic module. Refrigerant circuit: 1 pcs. Heat exchanger: Plate Condenser: Copper / Aluminum Compressors: 1 pcs. Mitsubishi DNB36FAEMT (scroll, inverter) Type of refrigerant: R410a Number of fans: 2 pcs. (Frequency inverter) Hydraulic module: 1 pcs. water pump Wilo Yonos PARA HF 25/10 (inverter), expansion vessel. Dimensions: 1.45x0.57x1.2 m. Weight: 180 kg. Working hours: 0 h. Condition: New Nledpfx Aexwmiqsh Uek

Condition: excellent (used), functionality: fully functional, Filter for extraction of dust and sawdust. Nlsdjtzld Uspfx Ah Uek

Condition: ready for operation (used), System: Netzsch 800 /80 sidebar Size of plate: 800 x 800 mm Chambers: 80 Filterplates: Polypropylene Filter cloths: as an option Outlet: open Filter surface: approx. 88,48 m² Volume of filtercake: approx. 1272 dm³ Working length: approx. 4656 mm Filter pressure: 15 bar Closing pressure: Min. 380 bar, max. 410 bar Plate closure: electro hydraulic Plate transport: manual Dimensions: LxBxH approx. 5300 x0900 x 1040 mm Weight filterpress: approx. 4 t Underframe: available from stock as optional accessories Nledpfx Ahsd E Dgko Uek Dimensions: LxBxH 8000 x 1050 x 2020 mm Weight: approx. 5 t Control cabinet: yes Pumps: as an option Accessories: mixing tank optionally available as a special accessory 3.00x1.50x2.20 m Special services: Refurbished service to customer optional. The system goes through a pre-delivery service check or a complete overhaul. Rent or Buy: Machine can be inspected at our factory We can offer Spare Parts, Accessories and Service for your Chamber Filter Press - Rittershaus & Blecher, Netzsch and more Filter Press Brands.

Condition: new, Year of construction: 2025, machine/vehicle number: 2022042210, Aluminum angled conveyor belt with substructure Conveyor belt length: 1,500mm flat + 3,000mm rising Pitch angle in bend 45°C Height of the horizontal top edge approx. 200mm PVC conveyor belt Conveyor belt EM 15/2 0+17 PVC green Belt width 500mm 31 pcs. T40 studs welded - pitch 300mm * antistatic due to threads in the fabric on the underside endlessly welded with stepped finger connection 40mm sidewall high-frequency welded on both sides * edge-free zone on both sides for tape guidance in the incline Lateral arrangement: -70+35-5+280-5+35+70 Full-surface underlay sheet Drive: Motor approx. 1.1KW Belt speed approx. 0.3m/sec * optionally controllable with frequency converter Connection 220/400V, 50Hz protection class IP54 Nlsdpoh Ellzofx Ah Uok

Condition: good (used), Total length 3300mm Discharge height approx. 2050mm Width: 300mm Quantity: 3 pieces Nlsdpfjhc Szmsx Ah Ujk Price/ piece

Year of construction: 2003, condition: ready for operation (used), A stationary and a mobile container emptying system (drum emptying) Netzsch are available. Drum size: 100l/200l, drive power: 15kW, max. delivery pressure: 8bar, delivery rate: approx. 1000l/h, speed: 1450rpm, max. liquid viscosity: 1000Pas. Machine dimensions X/Y/Z: approx. 1700mm/1300mm/2200mm. Documentation available. An on-site inspection is possible. Nlsdow R U Ayopfx Ah Uek

Condition: new, Year of construction: 2019, functionality: fully functional, cooling capacity: 24.7 kW (33.58 HP), type of cooling: air, overall weight: 265 kg, total width: 570 mm, total length: 1,450 mm, total height: 1,700 mm, warranty duration: 6 months, heating capacity: 26.1 kW (35.49 HP), Aircooled chiller/Heat pump CLIMAVENETA I BX N 025T HASNV 24.7 kW/26.1 kW Nlodpfx Ahsxwmg Ao Uok Cooling capacity: 24.7 kW / 7.02 tons (12/7 — 35°C) Heating capacity: 26.1 kW / 7.42 tons (40/45 —7°C) Year of manufacture: 2019 Options: Heat pump. Hydraulic module. Refrigerant circuit: 1 pcs. Heat exchanger: Plate Condenser: Copper / Aluminum Compressors: 1 pcs. Mitsubishi ANB52FFTMT (scroll, inverter) Type of refrigerant: R410a Number of fans: 2 pcs. (Frequency inverter) Hydraulic module: 1 pcs. water pump Wilo Yonos PARA HF 25/10 (inverter), expansion vessel. Dimensions: 1.45x0.57x1.7 m. Weight: 265 kg. Working hours: 0 h. Condition: New

Condition: excellent (used), Year of construction: 2015, Netstal EVOS 5500-2000 Injection Molding Machine Year of manufacture: 2015 Very compact, hydraulic, three-plate clamping unit with encapsulated lubrication system, ensuring an oil-free environment in the mold space. High-precision and wear-resistant linear guides guarantee maximum mold longevity and increased machine availability. The hybrid injection unit features a modular design and a flexible performance package (metering, clamping, injection) that can be adapted to specific applications. The highest plasticizing performance and optimal melt quality are ensured by selecting process-appropriate components. Servo-electric metering drive and state-of-the-art valve technology guarantee energy-efficient operation. Technical parameters Certification: CE in accordance with EU Directive 2006/42/EC (EN 60204, etc.) Mold installation height: 600–1050 mm Injection unit drive: metering axis speed up to 420 rpm, torque 2400 Nm Injection unit Injection speed: maximum dynamics thanks to high-performance servo valve technology Screw: 62 mm diameter, 25.2D length, version B – Three-zone screw made of hardened, wear-resistant tool steel – Injection pressure: 2400 bar – Injection volume: 749 cm³ Clamping unit Ejector force: 123.2 kN Main drive: Eco Powerunit 55 kW Nlodpfoxl Ul Asx Ah Ujk – Dual pump system with hydraulic accumulator – High-efficiency synchronous drive – Adaptive control technology for maximum energy efficiency Oil cooling: supply water temperature 35°C Base Cylinder head with open nozzle, prepared for pneumatic control Guide bushing R = 35 mm, through-hole D = 5 mm Mold plate hole pattern: Euromap standard Centering and ejector system Centering on nozzle-side plate: D = 125 H7 x 20 mm (Euromap) Through-hole in moving platen: D = 80 mm Ejector hydraulics positioned on the operator offside Ejector hole pattern: Euromap Ejector controlled Mold hydraulics 4 hydraulic circuits for auxiliary functions (ejector, cores, nozzle pins) Electrically controlled check valves in circuits A + B Free configuration of functions with position protection Nozzle hydraulics with needle shut-off 4 hydraulic circuits Flow speed and pressure manually adjustable Open/close function Special software: cascade control Pneumatics and cooling Water cooling battery and hot runner circuit – 4-section, switchable Pneumatics: 2x 3/2 valve, capacity 890 l/min Location: on operator offside at nozzle-side platen Electronics / Software / Interfaces Frequency: 50 Hz Power supply: 400V, 3P + N + E, tolerance ±10% (transformer required for larger deviations) Surge protection Mold heating: – 4 circuits at 3.3 kW each – 8 circuits at 0.75 kW each Connectors: HAN 16E for power and sensors, Euromap 14 Sockets: – 2x 16A CEKON (main switch-controlled) – 1x 32A CEKON with RCD (FI) switch Interfaces: – Euromap 15 – full implementation (parts 1–5) – SPC (Statistical Process Control) – Euromap 66 (control of 5 heating/cooling units) – Euromap 67 (robot interface for ejector and hydraulics) External fault signals: 2 inputs in control cabinet Operator identification: PIN

Condition: used, Year of construction: 1984, Name: Used filter press Manufacturer: Netzsch Type: 800/32 Year built: 1984 Construction form: Side beam press Filter pressure: 15 bar Press content: Approx. 480 Liters Cycle: Closed Filter area: approx. 34 m2 Plate size: 800 x 800 mm Number plates: 32 Plate material: Polypropylene Plate transport: Automatic Nodpfx Aow Rb Ehjh Uelk Filter cloth washer: No Plate pack length: approx. 2000 mm Cake thickness: 30 mm Closing pressure: 350 bar Dimensions: L 4.500 x W 1.700 x H 2.000 mm Empty weight: approx. 5000 kg Accessories: A control cabinet, a hydraulic system, a light curtain & drip trays. Condition: Second hand Price: On demand

Condition: like new (used), Year of construction: 2024, Permanent overbelt magnet separator TYPE DMPM800 1,400 x 900 x 220mm ===== Solid steel construction, welded Nlodpfx Ahehun Uij Ujk Construction welded & painted RAL 7016 (anthracite gray) Magnet dimensions: 800x500x180mm Drive roller + deflection roller S235 steel welded and machined Ø220x700mm crowned, shaft fixed with clamping bearings. Drive: GEMOTEG 1.1KW slip-on gear motor, speed 0.4-0.6m/sec Connection 400V, 50Hz, protection class IP54 Drive ready for connection to motor terminal box (commissioning must be carried out by a qualified electrician) PU conveyor belt DM 20/2 0+010 PU black matt 5.4mm thick Conveyor belt width: 650mm 7 TG-40 studs high frequency welded Belt material: 3-layer, particularly transversely stable * equipped with rust-proof alligator connectors RS125 Magnet properties: Built-in magnetic core: Strontium Ferrite Y30 Bound SfRe strontium hard ferrite magnetic core encased in soft iron so that very high permeability can be guaranteed. Housing with 1.4301 stainless steel plate and pole shoes tightly closed and sealed. Conveyor belt, conveyor belt system, discharge belts, belt conveyor, magnetic separator, overbelt magnetic separator, recycling, wood chips, plastic, metal-free metal detection, neodymium, overbelt magnet, magnetic belt separator Our core competence lies in supplying the customer with exactly what he really needs. Together with our customers, we work out customer-specific, individual solutions and supply corresponding systems from our own production. Feel free to contact us by phone to find a suitable solution for your application.

Condition: new, functionality: fully functional, Year of construction: 2026, The FABO planetary concrete mixer makes mixing operation provides quality homogenised mixes and productions from 0.5m3 to 2m3. It is excellent for smaller demands, precast products, mixing semi-dry coloured concrete, slump precast concrete, fiber reinforced concrete, self-compacting concrete, etc. Compacted Concrete Capacity m3 : 2 Loading Capacity m3 : 3 Mixer Power kW : 90 Gearbox = BONFIGLIOLI or equivalent brand Side Body Wearing Plates 10mm ST52 Bottom Wearing Plates 12mm HARDOX 500 Mixing Arm Wearing Plates 20 mm NI-HARD 400 No. of Stars x No of Blade on Each Star = 2X3 Nljdpfx Aexvnzfoh Uek Hydraulic Discharge Door AVAILABLE

Year of construction: 2007, condition: ready for operation (used), Various injection molding machines are available. 1) Arburg Allrounder 420 A 1000-400, clamping force: 100t, screw diameter: 30/35mm, year of manufacture: 2005. 2) Demag 1000-420-310 EL-Exis S, clamping force: 100t, screw diameter: 30mm, year of manufacture: 2003. 3) Demag 1000-420-200 EL-Exis S, clamping force: 100t, screw diameter: 25mm, year of manufacture: 2003. 4) Arburg 570 C 2000-150/60 2K, clamping force: 200t, screw diameter: 25/12+15mm, year of manufacture: 2007. 5) Arburg 420 C 1000-250, clamping force: 100t, screw diameter: 35mm, year of manufacture: 1996. 6) Arburg 420 C 1000-250, clamping force: 100t, screw diameter: 30/25mm, year of manufacture: 1995. 7) Arburg 420 C 1000-250, clamping force: 100t, screw diameter: 30mm, year of manufacture: 1994. 8) Netstal Synergy 600-110, clamping force: 60t, screw diameter: 25mm, year of manufacture: 2001. 9) Arburg 900T 800-150, clamping force: 80t, screw diameter: 25mm, year of manufacture: 2001. 10) 2 KM SilcoStar 922A, year of manufacture: 2007. On-site inspection is possible. Individual sale possible. Some machines are partially dismantled and/or defective. Nljdpfxswkiics Ah Uok

Condition: ready for operation (used), Year of construction: 2022, A complete tube filling and packaging line for ointments is available. 1) Tube feeder IWK TZK 200, year of manufacture: 1991. 2) Tube filling machine IWK TFS 30, year of manufacture: 1991. 3) Cartoner IWK CPS-R, year of manufacture: 1991. 4) Serializer Laetus MV-70-F-130-TL, year of manufacture: 2019. 5) Checkweigher Mettler & Toledo C3570, year of manufacture: 2019. 6) Bundle packer Kiener ASK 450, year of manufacture: 1993. 7) Case packer Skinetta PAL 145, year of manufacture: 1997. 8) Palletizer Skinetta PAL 1400, year of manufacture: 1997. 9) Horizontal laminar flow machine Marchhart LF-ZP-Horizontal, year of manufacture: 2020. 10) Accumulating roller conveyor RBS 140, year of manufacture: 1998. 11) Ointment pump Netzsch BEF200/NM045BH, year of manufacture: 2022. Documentation is available. On-site inspection is possible. Nlodpfx Ahouf T Nlj Usk

Year of construction: 2019, condition: ready for operation (used), A hardly used Netzsch rotary lobe pump is available. Flow rate: 30m³/h, max. pressure: 2bar, max. temperature: 80°C, design: block design, number of poles: 6, operating hours: approx. 5h. Documentation available. On-site inspection is possible. Nodpfxewtg Hqo Ah Uslk

Year of construction: 2008, condition: ready for operation (used), Ten injection molding machines are available. 1) Netstal SynErgy 1500/460, year of construction: 1998, clamping force: 140t, tie bar spacing: 510mm, platen dimensions X/Y: 750mm/750mm, max. opening stroke: 450mm, screw diameter: 45mm, injection volume: 255cm³, mold height min./max.: 250mm/550mm, max. injection pressure: 1753MPa, weight: approx. 9200kg, operating hours: 129131h. 2) Netstal SynErgy 1500/460, year of construction: 2007, clamping force: 140t, tie bar distance: 510mm, platen dimensions X/Y: 750mm/750mm, max. opening stroke: 450mm, screw diameter: 45mm, injection volume: 255cm³, mold height min./max.: 250mm/550mm, max. injection pressure: 1753MPa, weight: approx. 11500kg, operating hours: 85445h. 3) Netstal SynErgy 1500/460, year of construction: 2006, clamping force: 140t, tie bar distance: 510mm, platen dimensions X/Y: 750mm/750mm, max. opening stroke: 450mm, screw diameter: 45mm, injection volume: 255cm³, mold height min./max.: 250mm/550mm, max. injection pressure: 1753MPa, weight: approx. 11000kg, operating hours: 91159h. 4) Netstal SynErgy 900/230, year of construction: 2007, clamping force: 100t, tie bar distance: 410mm, max. opening stroke: 350mm, screw diameter: 40mm, min. mold installation height: 200mm, weight: 6800kg, operating hours: 73323h. 5) Netstal SynErgy 900/230, year of manufacture: 2007, clamping force: 100t, tie-bar spacing: 410mm, max. opening stroke: 350mm, screw diameter: 40mm, min. mold installation height: 200mm, weight: 6800kg, operating hours: 87883h.6) Netstal SynErgy 1500/230, year of construction: 2000, clamping force: 140t, tie bar distance: 510mm, platen dimensions X/Y: 750mm/870mm, max. opening stroke: 450mm, screw diameter: 40mm, injection volume: 161cm³, min. mold installation height: 250mm, max. injection pressure: 1447MPa, weight: 11000kg, operating hours: 93464h.7-8) Netstal ELION Force 800-270, year of construction: 2008, clamping force: 80t, tie bar distance: 410mm, platen dimensions X/Y: 600mm/632mm, max. opening stroke: 350mm, screw diameter: 40mm, injection volume: 161cm³, mold installation height min./max.: 250mm/500mm, max. injection pressure: 1690MPa, weight: 7800kg, operating hours: 82400h.9) Netstal SynErgy 800/230, year of construction: 2005, clamping force: 100t, tie bar distance: 510mm, platen dimensions X/Y: 617mm/600mm, max. opening stroke: 350mm, screw diameter: 40mm, injection volume: 161cm³, min. mold installation height: 200mm, weight: 6800kg, operating hours: 97530h.10) Arburg Allrounder 370C, year of construction: 1997, clamping force: 370t, platen dimensions X/Y: 570mm/570mm, max. opening stroke: 500mm, screw diameter: 30mm, injection volume: 70cm³, min. mold installation height: 250mm, max. injection pressure: 1500MPa, weight: approx. umentation available. On-site inspection is possible. Nljdpfsv Amrmox Ah Usk