Used Mchale F 550 for sale (34,892)

Condition: ready for operation (used), Year of construction: 2003, functionality: fully functional, machine/vehicle number: 0312101, working width: 550 mm, overall weight: 3,000 kg, power: 32 kW (43.51 HP), TECHNICAL DETAILS Number of stations: 1 Station type: Belt grinding Maximum working width: 550 mm MACHINE DETAILS Power: 32 kW Control system: Conventional Machining process: Dry Hnjdpfx Aozrmqqsitju Dimensions & Weight Dimensions (L x W x H): 1,700 x 2,700 x 2,900 mm Dry weight: 3,000 kg Shipping packages: 2 EQUIPMENT CE marking

Condition: used, mileage: 587,500 km, power: 129 kW (175.39 HP), first registration: 08/2017, fuel type: diesel, overall weight: 7,500 kg, gearing type: automatic, emission class: euro6, Equipment: tail-lift, Tail lift: ----Refrigeration unit: Hodpfxox Dzqvj Aitjnu ----- Automatic tail lift – air conditioning – Carrier Supra 550 Suspension: Leaf suspension

Condition: ready for operation (used), Year of construction: 2003, functionality: fully functional, working width: 550 mm, power: 32 kW (43.51 HP), empty load weight: 3,000 kg, Equipment: CE marking, No minimum price – guaranteed sale to the highest bidder! TECHNICAL DETAILS Maximum working width: 550 mm MACHINE DETAILS Hnjdozk Dyyepfx Aitju Power: 32 kW Dimensions & Weight Dimensions (L x W x H): 1,700 x 2,700 x 2,900 mm Empty weight: 3,000 kg Control: Conventional Wet/Dry: Dry EQUIPMENT Station type 1: Belt sander CE marking

Condition: used, Year of construction: 1998, operating hours: 8,260 h, Equipment: all wheel drive, * From municipal hands * Cemetery excavator - mini excavator * Manufacturer Kiefer - Boki 4550 * KW 40 / 1896 cc * VW engine * Operating hours: only 8260 h * Year of manufacture: 1998 * Dimensions: 4900 mm long, 1210 mm wide, 3200 mm high * ALL-WHEEL STEERING * Road legal Hjdpfstttu Dox Aitsnu * Heating * Hydraulic connection for HAMMER OPERATION * Extension for grab boom * Support extension * etc. * All information without guarantee * We reserve the right to sell the item prior to delivery * Please refer to our terms and conditions

Condition: new, turning diameter over bed 250 mm turning diameter over slide rest 140 mm turning length 550 mm turning speeds 50 - 2000 U/min centre height 125 mm Hnodevn U Efopfx Aitou spindle bore 26 mm tailstock quill taper MT 2 MK tailstock quill stroke 65 mm connected load frequency 230 V total power requirement 1,1 kW weight of the machine ca. 0,15 t dimensions of the machine ca. 1,3 x 0,6 x 0,65 m Benchtop lathe 3-axis LCD digital display system fully assembled. Longitudinal feed. 3-jaw chuck 125 mm. 4-jaw chuck 125 mm. Clamping plate. 4-way steel holder. Clock for thread cutting. Drip tray Hardened bed tracks. Emergency stop switch. Forage protection Set of wheels. Appropriate tools. Base cabinet is optional!!

Condition: used, mileage: 603,000 km, power: 353 kW (479.95 HP), first registration: 04/2004, fuel type: diesel, overall weight: 32,000 kg, axle configuration: > 3 axles, color: white, gearing type: mechanical, loading space length: 6,300 mm, loading space width: 2,450 mm, Year of construction: 2004, Equipment: ABS, crane, parking heater, DAF CF 85.480 Platform 6,30 m + CRANE + JIB + REMOTE CONTROL / 8x4 Accident-FREE IN GOOD CONDITION! ? YEAR OF PRODUCTION: 2004 ? MILAGE: 603 000 km EQUIPMENT: ? ABS ? C. LOCKING ? EL. WINDOWS ? EL. MIRRORS ? POWER STEERING ? TACHOGRAPH Hodpfx Aisy Eu N Rotsnu ? AIRCONDITION PLATFORM: 630 x 240 cm (L x W) CAPACITY: 11 000 kg TOTAL WEIGHT: 32 000 kg WHEELBASE: 205/360/138 cm TIRE SIZE: 315/80R22,5 SUSPENSION: SPRING CRANE: EFFER 550 H 4/S + 4S + REMOTE CONTROL VIN: XLRAD85XC4E629068 TEL: KUBA - POLSKI, ENGLISH, DEUTSCH, ITALIANO SEBASTIAN - POLSKI, DEUTSCH, ITALIANO, ????? LASZLO - MAGYAR COSTEL - ROMÂN? (Romana facem toate formalitatile pt export inclusiv nr)

Condition: new, - new -Description:- Saw blade tilt and height adjustment is manual- Max. Cutting height 200mm- Scoring device with separate drive motor- Main saw blade with belt drive and speeds 2800/3665/4800 min¯¹- High dead weight ensures vibration-free running- Large cantilever table with material roller- Rip fence with round bar guide- Extendable aluminum longitudinal fence with two folding stops- 7,5 kW main motor mounted on robust cast iron frame- Quadruple bearing format sliding carriage with double roller carriage made of anodized aluminum with high torsional rigidity- Multiple locking device on sliding table- Standard with table widening and table extension made of sheet steel- Large pendulum protection hood conveniently swivels up with the help of a gas pressure spring- Saw blade clamping via tool-free Rapid systemTechnical data:Dimensions and weightsLength approx. 3386 mmHeight approx. 1330 mmWidth/Depth approx. 3703 mmWeight approx. 1102 kgConnection suctionSuction port diameter 120 mmSuction port diameter saw blade guard 80 mmElectrical dataSupply voltage 400 VInput power 8,3 kWMotor speed 2800 min¯¹Mains frequency 50 HzOutput power 7,5 kWSliding carriage and tableFormat sliding carriage length 3200 mmFormat sliding carriage height 890 mmTable width 685 mmFormat sliding carriage width 416 mmTable length 1255 mmTable height 890 mmNoise emissionSound pressure level 96,5 dB(A)Circular saw unitCutting width with rip fence 1450 mmSaw blade inclination 90 - 45°Max. Cutting height 45°140 mmSpeed of saw blade 2800/3665/4800 min¯¹[Max. Cutting width to the left of the saw blade 3200 mmMax. Cutting height 90° 200 mmDiameter saw blade 550 mmScoring unitDiameter scoring saw blade 120 - 130 mmSpeed scoring saw blade 8000 min¯¹Item no.: 5200550 Hodpjvxr Rgefx Aitonu

Condition: used, Year of construction: 2001, Lippert Belt Conveyor Riser with arch and straight GF 5865-550-400 RA2505 Technical data: Conveying length (NL): 5865 mm (ascending conveyor 2455 mm + arch 3410 mm) Framework width (NB): 550 mm belt width (GuB): 400 mm height (BH): 105 mm support feet: optionally available Conveying speed (v m/s): adjustable up and down with frequency converter Drive: SEW gear motor S37 DT71D4/MM03/BW1 Electrical data: 50Hz V380-500, kW 0.075 / 0.37 / S1 Deflection roller (UR): Ø = 34 mm Drive drum (AT): Ø = 81 mm Belt: Type HSL 8 E Year of construction: 2001 Slope/slope: adjustable Optionally available: Hsdpsy R Hbpjfx Aitsnu Supports Side guides Prices net plus VAT from central warehouse Dr. Sonntag GmbH & Co KG, 97076 Würzburg For individual, professional advice, simply contact us. Simply contact us by phone or e-mail. We will be happy to help you with the planning and implementation of your projects. We look forward to hearing from you. With kind regards Your team at Dr. Sonntag GmbH & Co. KG Your specialist and contact for intralogistics

Condition: used, Year of construction: 2001, Lippert Belt Conveyor Riser with arch and straight GF 4846-550-400 RA2506 Technical data: Conveying length (NL): 4845 mm (ascending conveyor 4105 mm + arch 740 mm) Framework width (NB): 650 mm belt width (GuB): 500 mm height (BH): 105 mm support feet: optionally available Conveying speed (v m/s): Drive: SEW gear motor S37 DT71D4/MM03/BW1 Electrical data: 50Hz V380-500, kW 0.075 / 0.37 / S1 Deflection roller (UR): Ø = 81 mm Drive drum (AT): Ø = 81 mm Belt: Type HSL 8 E Year of construction: 2001 Slope/slope: adjustable Optionally available: Supports Side guides frequency converter for stepless speedcontrol Prices net plus VAT from central warehouse Dr. Sonntag GmbH & Co KG, 97076 Würzburg For individual, professional advice, simply contact us. Simply contact us by phone or e-mail. We will be happy to help you with the planning and implementation of your projects. We look forward to hearing from you. With kind regards Your team at Dr. Sonntag GmbH & Co. KG Your specialist and contact for intralogistics Hodpsy R Hbvofx Aitenu

Condition: used, Year of construction: 2001, Lippert belt conveyor belt transfer GF 1000-550-400 RA2508 Technical data: Conveying length (NL): 1000 mm Framework width (NB): 550 mm belt width (GuB): 400 mm height (BH): 105 mm support feet: optionally available Conveying speed (v m/s): Drive: SEW gear motor S37 DT71D4/MM03/BW1 Electrical data: 50Hz V380-500, kW 0.075 / 0.37 / S1 Hedpfx Aioy R Hb Notonu Deflection roller (UR): Ø = 34 mm Drive drum (AT): Ø = 64 mm Belt: Type SNB 5 E Year of construction: 2001 Optionally available: Supports Side guides frequency converter for stepless speedcontrol Prices net plus VAT from central warehouse Dr. Sonntag GmbH & Co KG, 97076 Würzburg For individual, professional advice, simply contact us. Simply contact us by phone or e-mail. We will be happy to help you with the planning and implementation of your projects. We look forward to hearing from you. With kind regards Your team at Dr. Sonntag GmbH & Co. KG Your specialist and contact for intralogistics

Condition: new, turning diameter over bed 250 mm turning diameter over slide rest 140 mm turning length 550 mm turning speeds 50 - 2000 U/min centre height 125 mm spindle bore 26 mm tailstock quill taper MT 2 MK tailstock quill stroke 65 mm connected load frequency 230 V total power requirement 1,1 kW weight of the machine ca. 0,15 t dimensions of the machine ca. 1,3 x 0,6 x 1,3 m Benchtop lathe with base cabinet 3-axis LCD digital display system fully assembled. Longitudinal feed. 3-jaw chuck 125 mm. 4-jaw chuck 125 mm. Clamping plate. Hnsdpfx Ajupxpmeitou 4-way steel holder. Clock for thread cutting. Drip tray Hardened bed tracks. Emergency stop switch. Forage protection Set of wheels. Appropriate tools.

Condition: new, turning diameter over bed 250 mm turning diameter over slide rest 140 mm turning length 550 mm turning speeds 125 - 2000 U/min centre height 125 mm spindle bore 26 mm tailstock quill taper MT 2 MK tailstock quill stroke 65 mm connected load frequency 230 V total power requirement 0,75 kW weight of the machine ca. 0,135 t dimensions of the machine ca. 1,25 x 0,6 x 0,6 m Speed in 6 levels 125 - 2000rpm. 3-jaw chuck 125 mm. 4-jaw chuck 125 mm. (Independent) Fixed bezel. Revolving bezel. 4-fold steel holder. chip tray. back panel. spindle protection. Hardened bed rails. Hjdpfxoupxcte Aitenu Longitudinal feed with left / right switching. Set of change gears. Associated Tools.

Condition: as good as new (ex-display), Year of construction: 2026, The BTS-MF550 is the ideal waste baler for compacting your loose cardboard and plastic film waste into a bale of up to 550 kg. The baling press impresses with its ease of use, safe operation and its spacious filling chamber, it is ideal for medium to large amounts of material. By baling these valuable and recyclable materials you achieve a volume reduction of up to 90%, a significant saving on your disposal costs and you properly return the material back into the recycling cycle. Pressing force: 50 Ton Bale weight: up to 550 kg (material depending) Bale size: 1200 H (var.) x 1500 W x 800 D mm Machine size: 3217 H x 2115 W x 1200 D mm Machine weight: 1650 kg Transport height: 2500 mm Loading aperture: 1500 W x 770 H mm Cycle times: 40 seconds Motor: 5.5 kW 16 Amp Power supply: 380 - 400 V (3 phase) Noise level: 68 dB Dual cylinders for even compaction of the material User-friendly lever control Bale kicker for easy eject the bales Retainer for reducing the material spring back Reel holder for 5 rolls of strapping A quality product “Made in Europe” Suitable for compacting Hedpfxovamlnj Aitjnu Cardboard Plastic film and foils Big Bags Clothes Light valuable materials Optional extras Machine colour RAL PLC auto compaction cycles with bale full light and E-stop with locking key Sliding top door Strapping rolls Motor 11 kW 32 Amp Waste Baler, Waste Compactor, Cardboard Baler, Film Baler, Foil Baler, Packaging Plastic Film Foil, Bailer, Baling Press, Garbage Press, Trash Compactor, Baling Compactor, Paper Press, Waste Paper Press, Cardboard Press, Cardboard Compactor, Foil Press, Paper Baling Press, Waste Baler, Residual Waste Compactor

Condition: new, power: 7.5 kW (10.20 HP), Equipment: scorer, Net price: €10,500 - Scorer - Saw blade tilt and height adjustment are manual - Cutting height 200mm - Scoring device with separate drive motor - Main saw blade with belt drive and speeds 2800/3665/4800 min¯¹ - High dead weight ensures vibration-free operation - Large extension table with material roller - Parallel fence with round bar guide - Extendable aluminum longitudinal fence with two folding stops - 7.5 kW powerful main motor mounted on a robust cast iron frame - Four-times-cushioned sliding table made of anodized aluminum with high torsional rigidity - Multiple locking on sliding table - Standard with table extension and table extension made of thick plate - Large swing guard hood easily swivels up using a gas spring - Saw blade clamping via tool-free rapid system + Extraction connection Extraction port diameter: 120mm Extraction port diameter for saw guard: 80mm Hnsdpjwf Ndcsfx Aitou + Electrical data Connection voltage: 400V Mains frequency: 50Hz Nominal power consumption: 8.3kW Output power: 7.5kW + Sliding table and table Sliding table length: 3200mm Sliding table height: 890mm Table height: 890mm + Circular saw unit Cutting width with parallel fence: 1450mm Max. cross-cutting width left of saw blade: 3200mm Saw blade tilt: 90 – 45° Max. cutting height 90°: 200mm Max. cutting height 45°: 140mm Saw blade diameter: 550mm

Year of construction: 2005, condition: ready for operation (used), suitable for transferring, indexing, breaking out, and blowing out. Hedpfeh Svyvjx Aitonu

Year of construction: 2026, condition: new, Screening machine | Oscillating screen type ASM-550 Demonstration machine - Make: S&F GmbH - Type: ASM-550 - Screening capacity: approx. 60 - 70 m³/h (for wood chips and sawdust) - Screening area: 5.4 m² - Fractions: 3 or 4 pieces - Screen decks: 3 pieces - Drive power: 4.0 kW - Machine weight: approx. 3,800 kg - Machine colour: RAL 6011 Reseda green - Screen inserts and material outlet freely selectable Hedpfxoxtfv Io Aitsnu Suitable for screening the following bulk materials, among others: - Wood chips and wood shavings - Sawdust and sawdust - biomass - Wood pellets - charcoal - Waste wood - Bark Vibrating screen | Wood chip screen | Vibrating screen machine | Flat screen | Vibrating screen | Roll sifter | Screening machine for wood chips

Condition: excellent (used), I am offering a professional LUKAS LZR 12/550 hydraulic rescue cylinder, used by fire brigades and in technical rescue operations. Hnjdpfx Ajz Sl D Aoitou This equipment is from the renowned German brand LUKAS, designed for rescue work during road accidents and technical operations – very robust and durable construction. Condition: The item is used. Normal signs of use are visible (scuffs, worn label – see photos). Technical condition is unknown – sold as untested / for inspection. Technical data (from markings): Model: LZR 12/550 Manufacturer: LUKAS (Germany) Type: hydraulic cylinder / spreader Application: technical rescue, hydraulic power Equipped with working tips Set includes: LUKAS LZR 12/550 hydraulic cylinder Mounting element as shown in the photos Applications: Fire brigades (voluntary and state) Road rescue operations Technical and maintenance work Can also be used in hydraulic power applications.

Condition: used, Year of construction: 2005, gearing type: other, first registration: 01/2005, mileage: 1 km, driver cabin: other, Vehicle location: Bovenden. Silo capacity: 5 m³. Tank capacity: 2450 liters (2 x 1225 liters). Unladen weight: approximately 1545 kg. Hnsdoi Rmkaspfx Aiteu ACCESSORY INFORMATION PROVIDED WITHOUT GUARANTEE. Subject to changes, prior sale and errors!

Condition: used, Year of construction: 2025, Spindle tiltable: Yes, -5 to 45° Height adjustment: manual / handwheel Spindle stroke: 142 mm Tilting adjustment: manual / handwheel Fence adjustment: manual Height display: scale Tilting angle display: scale Milling fence display: scale Spindle diameter: 30 mm Hsdpfx Aijxrbihjtenu Spindle length: 140 mm Max. tool diameter: 250 mm Speeds: 3500 / 6000 / 8000 / 10000 rpm Motor power: 5.3 kW Motor brake: Yes, automatic Table size: 1000 mm x 520 mm Sliding carriage length: 1200 mm Extraction connection: 2 x 120 mm Machine length: approx. 1200 mm Machine width: approx. 900 mm Weight: 400 kg

Condition: excellent (used), Condition: Very good condition with relatively low usage. The machine was used in a correctional facility and was rarely operated. Metallkraft precision surface grinding machine FSM 2550 Robust surface grinding machine with CNC-controlled vertical feed and electromagnetic clamping plate for precision surface grinding operations. Grinding table clamping area (L x W): 500 x 250 mm Distance spindle / table: max. 500 mm Workpiece weight: max. 190 kg Feed rate X-axis: 5 - 25 m/min Spindle speed: 2,900 min-1 Grinding wheel (D/dxB): Ø 180 / 31.75 x 13 mm Hnodpfxsz Hly Rs Aiteu Connection voltage: 400V / 50Hz Motor power spindle: 1.5 kW Motor power hydraulic pump: 0.75 kW Footprint: 2,250 x 1,400 mm Dimensions (L x W x H): 2340 x 1500 x 1800 mm Weight (net): approx. 1,385 kg

Condition: used, functionality: fully functional, Year of construction: 2017, operating hours: 20,121 h, load capacity: 1,300 kg, lifting height: 5,500 mm, free lift: 1,895 mm, fuel type: electric, mast type: triplex, construction height: 2,400 mm, fork carriage width: 980 mm, fork length: 1,150 mm, empty load weight: 3,076 kg, total length: 1,800 mm, drive type: Elektro, construction width: 1,070 mm, Electric 3-wheel forklift Load center: 500 Fork width: 100 mm Fork thickness: 35 mm ISO class: ISO Class 2 = 1,000 - 2,500 kg Mast type: Triplex Technical condition: good Front tire type: Superelastic Front tire size: 18x7-8 Front tire condition: 60 - 80% Hnjdpfx Aisz Idzieteu Rear tire type: Superelastic Rear tire size: 140/55-9 Rear tire condition: 60 - 80% Battery voltage: 48V Battery capacity: 500Ah Battery manufacturer: Northbatt Battery type: PzS Battery year of manufacture: 2025 Battery condition: New 4. Valve, work light at the front

Condition: excellent (used), mileage: 439,700 km, power: 213 kW (289.60 HP), first registration: 10/2015, fuel type: diesel, axle configuration: 4x2, wheelbase: 5,770 mm, fuel: diesel, color: silver, driver cabin: day cab, gearing type: automatic, number of gears: 12, emission class: euro6, suspension: air, Year of construction: 2015, Equipment: crane, differential lock, Container truck with loading crane MAN TGM 18.290 First registration: 29.10.2015 Mileage: 439,700 km Automatic transmission, 12 speeds Hsdpjzl Tq Djfx Aitjnu PALFINGER PK15500 loading crane Year of manufacture: 2010 2x hydraulically extendable Lifting capacity: 3,030 kg at 4.5 m 2,250 kg at 6.1 m 1,690 kg at 8 m 5th and 6th function (slewing/grab function) Remote control Hyvalift container hooklift system Hook-roller distance (retracted): 3.65 m Hook-roller distance (extended): 5.0 m Bumper overhang: +0.25 m Front tyres: approx. 50 % Rear tyres: approx. 40 % Front brake pads: 64-62 % Rear brake pads: 30-35 % Cevoman bv. Lenskensdijk 5 2200 Herentals Belgium

Condition: as good as new (ex-display), Year of construction: 2026, The BTS-MF550 is the ideal waste baler for compacting your loose cardboard and plastic film waste into a bale of up to 550 kg. The baling press impresses with its ease of use, safe operation and its spacious filling chamber, it is ideal for medium to large amounts of material. By baling these valuable and recyclable materials you achieve a volume reduction of up to 90%, a significant saving on your disposal costs and you properly return the material back into the recycling cycle. Pressing force: 50 Ton Bale weight: up to 550 kg (material depending) Bale size: 1200 H (var.) x 1500 W x 800 D mm Machine size: 3217 H x 2115 W x 1200 D mm Machine weight: 1650 kg Transport height: 2500 mm Loading aperture: 1500 W x 770 H mm Cycle times: 40 seconds Motor: 5.5 kW 16 Amp Power supply: 380 - 400 V (3 phase) Hjdpfx Aiefgbtcstjnu Noise level: 68 dB Dual cylinders for even compaction of the material User-friendly lever control Bale kicker for easy eject the bales Retainer for reducing the material spring back Reel holder for 5 rolls of strapping A quality product “Made in Europe” Suitable for compacting Cardboard Plastic film and foils Big Bags Clothes Light valuable materials Optional extras Machine colour RAL PLC auto compaction cycles with bale full light and E-stop with locking key Sliding top door Strapping rolls Motor 11 kW 32 Amp Waste Baler, Waste Compactor, Cardboard Baler, Film Baler, Foil Baler, Packaging Plastic Film Foil, Bailer, Baling Press, Garbage Press, Trash Compactor, Baling Compactor, Paper Press, Waste Paper Press, Cardboard Press, Cardboard Compactor, Foil Press, Paper Baling Press, Waste Baler, Residual Waste Compactor

Condition: used, For inquiries regarding the attachment, please contact Mr. Herden at [phone number]. Holp MultiGrip Bucket / MG.022.055 / MS01 / 550 mm cutting width / HARDOX / NEW / in stock & immediately available Price: €2,460.00 net / €2,927.40 gross - Excavators up to: 2.2 tons - Weight approx.: 80 kg - SAE capacity: 53 liters - Cutting width: 550 mm - Maximum opening: 530 mm - The bucket is made entirely of HARDOX. - The MultiGrip combines the two attachments, a deep bucket and a grapple, into a single tool. Advantages of the Holp MultiGrip Bucket: - Cylinder with hardened piston rod - Only the grapple swivel lines are required for operation - Robust mounting in the side wall - Secure gripping and transportation - Stable shafts connect the two fingers (form a 3-point grip for small parts) - Significantly lighter than a grapple - During excavation work, up to 30% more soil can be loaded into the bucket - Minimizes damage from falling material The MultiGrip is suitable for all digging and gripping operations; it is ideal for moving stones, backfilling soil, and gripping wood and brush, and is significantly faster than a grapple. It can grip and sort all types of materials, even soil or grass. Due to its unique shape, the MultiGrip bucket has optimal penetration and handles bulky material well. We have many other Holp products in our warehouse that are immediately available! Hsdpfx Aioyl Hdljtonu Please contact us at [phone number] or [email address] for this. Upon request, we will also be happy to provide you with a financing offer. We are an official Holp sales and service partner. We are an official OilQuick sales and service partner. We are an official Weber MT sales and service partner. We are an official Magni Teleskoplader sales and service partner. We are an official DMS sales and service partner. We are an official Seppi M. sales and service partner. We are an official Westtech sales and service partner. We are an official JCB construction machinery sales and service partner. We are an official Mercedes-Benz sales and service partner. We are an official Iveco sales and service partner. In addition, with 800 used vehicles, we are one of the largest commercial vehicle dealers in Germany. We will supply you with the complete Holp range! Errors and prior sale are subject to change! = Further information = New: Yes Intended use: Construction Empty weight: 80 kg Please contact Marius Herden for more information.

Condition: like new (used), operating hours: 10 h, functionality: fully functional, Horizontal surface grinding machine KNUTH Type HFS 2550 n VC Table: 500 x 250 mm Grinding length: 560 mm Grinding width: 275 mm Distance between table and spindle axis: 450 mm Automatic feed Magnetic table Coolant system Hodpfx Aezquawsitonu