Used Starfrost Hs-750F-17H. for sale (3,236)

Condition: good (used), High-speed camera, -Handover: in its current condition as inspected -Part: unchecked from stock -Manufacturer: Kodak, EKTAPRO HS Motion Analyzer Model 4540 -Voltage: 200-240 V -Individual components: see photos for technical data -Transport container: incl. Lodeg Dc Hpepfx Ad Ashf -Transport dimensions: 1200/800/H570 mm Total weight: 84 kg

Condition: used, Hand lever snips, lever scissors, long knife sheet metal and round steel snips, sheet metal snips, profile steel snips -Manufacturer: Mafrino, lever shears, profile steel shears type HS 8 C -Steel sheet: up to 8 mm -Round steel: up to 18 mm -Cutting capacity: see photo nameplate -Hold-down device: continuously adjustable -Total dimensions: 620/200/H1440 mm Ljdeiachgspfx Ad Ashf -Transport dimension: 1100/200/H490 mm -Weight: 80 kg

Condition: used, Power supply, converter, converter, power supply unit, Smart-UPS, spare battery -APC: Back-UPS HS 500 -Connection: 230 V/50-60 Hz -Active power: 300 W -Apparent power: 500 VA Ljdpfx Aefkpigsd Aehf -Price: per piece -Number: 3 pieces -Dimensions: 375/225/H105 mm -Weight: 7.1 kg

Condition: new, Year of construction: 2023, functionality: fully functional, with 8 pallets Fanuc M-Pro1 (0i-MF Plus) control system Travel X/Y/Z: 800/800/860 mm Rapid traverse X/Y/Z: 74/74/74 m/min Pallet size 500 x 500 mm Load capacity: 550 kg per pallet Workpiece size: Ø800 x H1,000 mm Tool holder: BBT 40 Number of magazine positions: 220 Max. Tool diameter: Ø95 mm Max. Tool diameter with free neighboring pockets: Ø185 mm Max. Wkz. length: 400 mm Max. Tool weight: 8 kg Spindle cone: BBT40 Big Plus™ Lhedpfx Adjuafl Io Asf Speed: 15,000 rpm Chip spirals on the right and left in the machine Coolant through the spindle Dual chip conveyor Fully-fledged 4th axis from PARKSON 50 kvA transformer

Condition: new, Year of construction: 2025, AVEREX HS-540i GTS 2-APC, New Machine Horizontal Machining Center with the option to adapt an optional pallet rotary magazine (6-APC or 8-APC) Standard equipment - AVEREX MPro1 (FANUC 0i-MF Plus) - 15" color LCD display, MANUAL GUIDE i, QWERTY* keyboard - iHMI – Intelligent Human-Machine Interface - Program memory with 2 MB and up to 1,000 programs - 4-axis simultaneous operation (X, Y, Z, B) - AICC II Control with 200-block Look Ahead function - HRV3+ servo drives (digital servo current control) - JERK Control (jerk regulation) - Fine Surface Technology (High-Speed High Quality) - Extended workpiece coordinate system G54.1 P1 - P300 - Workpiece coordinate system G52 - G59 - Memory card (PCMCIA Flash Card) and USB slot - Network interface RJ45, Embedded Ethernet - Enhanced embedded Ethernet - Week timer: Auto. Power On/Off for the machine - High-speed skip function - Tool Offset Memory C - 400 pairs of tool corrections - 1,000 storable programs - Programmable data input (G10) - Programmable spindle load monitoring M37/M38 - Tool life management - Extended macro variables (#100–#199, #500–#999) - Program restart - Helical interpolation - Cylindrical surface interpolation (G07) - Fixed drilling cycles - Synchronous tapping (G84/G74) - Rigid tapping with bell-shaped acceleration/deceleration - Programmable mirroring, scaling - Polar coordinate programming (G15/G16) - Chamfering or rounding corners (,C / ,R) - Optional skip blocks, up to 9 - User-defined macro programming Axis Travel - Travels X/Y/Z: 800/800/860 mm Speeds - Rapid traverse X/Y/Z: 74/74/74 m/min - Feed rate during milling: 0–40,000 mm/min - Rapid traverse B: 66.6 min-1 - 1G+ acceleration Pallet Changer - Rotary changer - Number of pallets 2-APC: 2 (machine / setup station) - Pallet size: 500 x 500 mm - Hole grid: 5 x 5 M16 x 25 mm deep, 100 mm pitch - Loading capacity: 550 kg per pallet - Workpiece size 2-APC: Ø800 x H1,000 mm - Workpiece size 6-APC/8-APC: Ø800 x H900 mm - Mechanical locking of pallet clamping - Pallet clamping force: 9.8 kN x 4 cones (39.2 kN) - Pallet height from floor: 1,100 mm - Standard preparation for retrofit of 4-way pallet storage (HS-540i GTS 2-APC ==> 6-APC, 2 + 4 pallets) High-Speed Tool Changer - Tool holder: BBT-40 (optional SK-40 DIN69871 or HSK-A63) - Number of magazine positions: 80 - Max. tool diameter: Ø95 mm - Max. tool diameter with adjacent spaces free: Ø185 mm - Max. tool length: 400 mm - Max. tool weight: 8 kg - Type: Fixed place / random - Speed: 16 s for 80 tools - Tool change time: 0.9 s / 2.1 s (heavy tool) - Chip-to-chip time: 3.0 s / 3.5 s (heavy tool) Spindle Rotary Axis - Manufacturer: PARKSON™ - Axis: full 4th axis - Max. rotation: 66.6 rpm - Indexing: 0.001° - Clamping torque: 5,000 Nm - Holding torque: 1,973 Nm Lhjdpfswxdpgex Ad Aof Linear Guides - Manufacturer: THK™ - Width: 45 mm - Guide shoes X/Y/Z: 190 x 120 / 120 x 70 / 154 x 86 mm Ball Screws Coolant, chip, and compressed air management

Condition: used, mileage: 192,363 km, power: 243 kW (330.39 HP), first registration: 06/2020, fuel type: diesel, overall weight: 26,000 kg, axle configuration: 3 axles, next inspection (TÜV): 07/2026, gearing type: automatic, emission class: euro6, Equipment: ABS, air conditioning, electronic stability program (ESP), navigation system, Video Turning System (VAS) Differential lock, rear trailing axle steered and liftable, ASR, disc brakes, central locking, MAN Radio Media Truck with navigation, rotating warning beacons, LGS IV, ASR, EBA2, ESS, MAN EasyStart, MAN Tronic cornering light, 650Nm PTO with flange, left-hand drive, all rear-view mirrors heated and electric, RIO Box HS Front loader fixed body Millennium XXL 37 m³, front loader container up to 8 m³, HFS 8500 front loader tipping system, lifting capacity approx. 3,600 kg, 1.1 m³ container, automatic lid opener, hydraulic fork adjustment, DIN 30737 pocket container, remote control, lifting mast, Sywatec scale (1.1 containers via arms, small containers and UL containers can be emptied). MD4 control system. Lhodpfxoxpztbe Ad Aof

Condition: used, mileage: 66,959 km, power: 235 kW (319.51 HP), first registration: 08/2020, fuel type: diesel, overall weight: 26,000 kg, axle configuration: 3 axles, next inspection (TÜV): 01/2027, gearing type: automatic, emission class: euro6, Equipment: ABS, air conditioning, electronic stability program (ESP), navigation system, RIO Box, LGS IV, EBA 2, ASR, ESS, MAN BrakeMatic, MAN Tronic, ASR, disc brakes, trailing axle steered/liftable, 3-seater, ASR, radio MAN Media Advanced Navi 7" incl. SD card, BTFSE for 2 telephones, Aux/USB, MAN CameraView pre-loaded HS Olympus 21 m³ suitable for household waste and bulky waste, with Terberg Terberg Omni-DEKA automatic comb tipping system for 60-1100 l containers. Comfort gearshift, central lubrication system, automatic lock Lodpsv D S Ngjfx Ad Ajhf

Condition: used, Year of construction: 2000, machine/vehicle number: Pulsar HS-150RAS, Tacchella Pulsar HS-150RAS CNC Angle Approach Cylindrical Grinder Lhedpfoxxyqkex Ad Ajf dia 250 x 800mm, VM24 grinding wheel balancing system, MARPOSS InProcess measuring unit, CNC SIEMENS SINUMERIK 840D

Condition: good (used), Height gauge, parallel gauge, height measuring device -Manufacturer: Mitutoyo, Height Gauge Type HS-100 -Max. working height: 1000 mm Lsdpfx Adeiaql Nj Ashf -Dimensions: 250/155/H1340 mm -Weight: 15.6 kg

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 55900 € 1056.51 € 3100 mm 9 mm 8 mm 7 mm 7 mm 5 mm 245 mm 245 mm 180 mm 1,5 / 6 m/min 7.5 kW 5350 mm 1600 mm 1470 mm 6850 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support Lodpfx Adeyb Sz Is Aehf NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Lsdpfxeyb Syws Ad Ajhf Türkei 48100 € 918.71 € 2550 mm 9 mm 9 mm 7 mm 7 mm 5 mm 220 mm 220 mm 160 mm 1,5 / 6 m/min 5.5 kW 4900 mm 1150 mm 1250 mm 4600 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, Year of construction: 2024, neu 2024 9729 prompt, Zwischenverkauf v Türkei 28450 € 488.96 € 1 25600 € 1550 mm 7 mm 7 mm 4.5 mm 4.5 mm 3.5 mm 150 mm 150 mm 130 mm 1,5 / 6 m/min 4 kW 3750 mm Ledpfx Ajyb Szhed Ajhf 960 mm 1100 mm 2500 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: (time of deliver with options approx. 10 weeks) Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 49900 € 953.09 € 2050 mm 13 mm 13 mm 10 mm 10 mm 8 mm 245 mm 245 mm 180 mm 1,5 / 6 m/min 7.5 kW 4300 mm 1600 mm 1470 mm 5450 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Ledpfx Adjyb Sydo Aehf Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 31600 € 603.56 € 2050 mm 6 mm 6 mm 4 mm 4 mm 3 mm 150 mm Ledpjyb Szbjfx Ad Aehf 150 mm 130 mm 1,5 / 6 m/min 4 kW 4250 mm 960 mm 1100 mm 2800 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 57000 € 1077.3 € 2550 mm 13 mm 13 mm 10 mm 10 mm 8 mm Ledpfxeyb Sy Re Ad Aohf 260 mm 260 mm 200 mm 1,5 / 6 m/min 7.5 kW 4800 mm 1600 mm 1550 mm 6800 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 46300 € 884.33 € 2050 mm 11 mm 11 mm 9 mm 9 mm Lhsdpfx Adeyb Szue Aef 7 mm 220 mm 220 mm 160 mm 1,5 / 6 m/min 5.5 kW 4400 mm 1150 mm 1250 mm 4080 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 52700 € 996.03 € 2550 mm 10 mm 10 mm 8 mm 8 mm 6 mm 245 mm 245 mm 180 mm Lhsdoyb Sykjpfx Ad Aof 1,5 / 6 m/min 7.5 kW 4800 mm 1600 mm 1470 mm 6170 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Lhsdpfx Aeynm Ehed Ajf Türkei 53700 € 1014.93 € 2050 mm 16 mm 16 mm 13 mm 13 mm 10 mm 260 mm 260 mm 200 mm 1,5 / 6 m/min 7.5 kW 4300 mm 1600 mm 1550 mm 6100 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 60600 € 1145.34 € 3100 mm 10 mm 10 mm 8 mm 8 mm 6 mm 260 mm 260 mm 200 mm 1,5 / 6 m/min 7.5 kW 5350 mm 1600 mm 1550 mm 7685 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Lhsdpsynm D Refx Ad Aof Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 32480 € 620.37 € 1550 mm 9 mm 9 mm 7 mm 7 mm 5 mm 180 mm 180 mm 150 mm 1,5 / 6 m/min 5.5 kW 3900 mm 1150 mm 1250 mm 3250 kg 4 rolls Lhsdpfxsynmzps Ad Aef fullhydraulic drive of upper roll and lower roll hydraulic infeed of lower and side roll digital read-out of lower and side rolls position hardened rolls conical bending device hydraulic load relieving of upper roll hydraulic drop-end bearing 2 working speeds central lubrication system protectionagainst overload moveable control pane according to CE rules OPTIONAL EQUIPMENT (PRICES ON REQUEST): infinitely adustable speed of rolls hydraulic side support hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: the max. sheet metal thickness isequivalent to 50 % of nominal capacity the cone length can be max. 30 % oremust be more than 60 % of roll length hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 40900 € 781.19 € 2050 mm 10 mm 10 mm 8 mm 8 mm 6 mm 200 - 220 mm 200 - 220 mm 160 mm 1,5 / 6 m/min 5.5 kW 4400 mm 1150 mm 1250 mm 3950 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Lsdpfxeynmyfj Ad Aehf Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, neu ca. 10 Wochen ab Auftrags Türkei 43550 € 831.81 € 1550 mm 12 mm 12 mm 10 mm 10 mm 8 mm 220 mm 200 mm 160 mm 1,5 / 6 m/min 5.5 kW 3900 mm 1150 mm 1250 mm 3600 kg 4 rolls Top rolll driven by hydromotor and planetary gearbox, bottom roll driven by gear and cardan system Pinch roll and latereal rolls move with hydraulic cylinders Digital read-out for lower and side rolls position Hardened rolls Conical bending device Hydraulic load relieving of upper roll Hydraulic drop-end bearing 2 working speeds Ljdpfx Adeynmx Ij Ajhf Protectionagainst overload Moveable control pane According to CE rules OPTIONAL EQUIPMENT: Infinitely adustable speed of rolls Hydraulic side support Hydraulic top support NC control IMPORTANT ISSUES AT CONICAL BENDING: The max. sheet metal thickness isequivalent to 50 % of nominal capacity The cone length can be max. 30 % oremust be more than 60 % of roll length Hardened rolls are recommended

Condition: new, Year of construction: 2026, NIVEAU - Lift table HS 300 midi incl. swivelmax Description: ᐳ Mobile scissor lift table with platform base frame and 4 holes for holding pins; 4 swivel castors, 2 of which have brakes; wheel Ø 125 mm; operated via foot pump Load capacity in kg: 300 Weight in kg: 85 Effective stroke in mm: 610 Overall height in mm: 400 Overall height in mm: 1010 Platform size in mm: 1200 x 740 Lhodpfxetgychj Ad Aef Inclusive ! Swivelmax - platform swivel frame with 2-position locking (vertical/horizontal) for panel weights up to approx. 120 kg. The swivel frame can be mounted on the platform base frame of the HS 300 midi in just a few simple steps. Even large-format panels can be swiveled from the vertical to the horizontal position by one person without any effort using this accessory. Size of the panel pivoting frame 1800 x 1480 mm Location: ex stock 54634 Bitburg - available immediately -

Condition: excellent (used), Year of construction: 2000, functionality: fully functional, Control: CNC path control with color screen SEIKOS 16 M TECHNICAL DATA Working area: X-axis (table cross travel) 680 mm Y-axis (spindle head vertical travel) 680 mm Z-axis (column longitudinal travel) 680 mm Pallet clamping surface 500 x 500 mm Drive power (50% DC/continuous) 25/22 kW Speed range (2 stages) 60 – 12,000 rpm Tool holder DIN 69871 A 40 Tool changer (chain magazine) Number of magazine stations 60 Max. tool diameter 95/160 mm Chip-to-chip time 3.8 sec EQUIPMENT/ACCESSORIES  Complete enclosure with sliding door, electrically interlocked incl. work area lighting  Double pallet changer  Automatic tool changer ATC 60  Chip conveyor  Coolant system with 3 pumps, 100 l tank  Coolant feed through spindle nose approx. 25/40 bar  Work area washdown system  Broken drill monitoring (controllable via G-code command)  Tool measurement (controllable via G-code command) Lhsdpfx Asw Ud U Ted Asf  Electronic handwheel  2 additional pallets  Table with 1° indexing  Spindle can be electronically positioned  Setup elements  Documentation

Year of construction: 2007, condition: good (used), For sale is our Parmi SPI HS 70 L solder paste inspection system in good condition. Serial no.: H7L15212F. The unit is currently located at our Hungarian facility in Vac, but can be transported to Germany at any time. We are happy to answer any questions you may have regarding the system. Lhedpfx Adjyx Smaj Ajf