Berg & Schmid Cnc Diskinis Pjūklas pirkti naudotą (14 942)

Būklė: naujas, Disko skersmuo: 370 mm Pjovimo diapazonas esant 90 laipsnių kampui: apytiksliai 120 mm (apvalus) Pjovimo diapazonas esant 90 laipsnių kampui: 100 mm (kvadratinis) Pjovimo diapazonas esant 90 laipsnių kampui: 180 x 100 mm (stačiakampis) Darbinis aukštis: 925 mm Disko sukimosi greitis: 17–70 aps./min. Bendroji galia: 3,0 kW Ijdpszlkvdefx Aatjid Užimamas plotas: apytiksliai 1,8 x 1,1 x 2,0 m Šalto pjovimo diskinio pjūklo automatas – CNC valdymas – Mikro purškimo sistema

Būklė: naujas, Cutting diameter round: 300 mm Cutting diameter square: 300 mm Cutting diameter flat: 300 x 260 mm Saw band length: 3920 x 34 x 1.1 mm Table height: 780 mm Band speed: 20 - 100 m/min Total power requirement: 3.7 kW Isdpfx Aaexfwbtotsid Machine weight: approx. 1.65 t Dimensions (L x W x H): 2.0 x 2.05 x 1.7 m Unused demonstration machine!!!!! 2-column high-performance bandsaw automaton of the SBS series • Modern SNC 20 control unit in CNC version • Frequency-controlled saw drive • Work lamp • Powered chip brush • Hydraulic band tensioning • Clamping pressure regulation • Double vice (before and after the band) • Creep mode for positioning • Bundle clamping electrically and hydraulically prepared • Chip conveyor The SNC 20 control allows for convenient and straightforward input of up to 20 different sawing tasks (length and quantity). When the target dimension is entered, the control automatically calculates the trim cut and the number of feeds. The error code display system also provides for rapid troubleshooting and error analysis. Including band run monitoring (EUR 1,800)

Būklė: naujas, Cutting diameter round: 300 mm Cutting diameter square: 300 mm Cutting diameter flat: 300 x 260 mm Saw band length: 3920 x 34 x 1.1 mm Table height: 780 mm Band speed: 20 - 100 m/min Total power requirement: 3.7 kW Machine weight approx.: 1.65 t Dimensions (L x W x H): 2.0 x 2.05 x 1.7 m SPECIAL OFFER PRICE!!!! 2-Column High-Performance Bandsaw Automatic Machines of the SBS Series The SBS series convinces with its advanced technology, high quality, durability, and an unrivalled comprehensive standard equipment package. • Modern SNC 20 control system for CNC versions • Frequency-controlled saw drive • Control buttons with pictograms • Work light • Powered chip brush • Hydraulic band tension • Clamping pressure regulation • Double vise (in front of and behind the blade) • Creep speed for positioning • Bundle clamping, prepared for electrical and hydraulic operation • Chip conveyor Iedpfx Aasfb Nbfotjid The SNC 20 control system allows convenient and intuitive input of up to 20 different sawing jobs (length and quantity). When entering the target dimension, the control automatically calculates the kerf and the number of feed movements. Additionally, the fault code display system provides fast analysis for error correction.

Būklė: naujas, Cutting diameter round: 330 mm Cutting diameter square: 330 mm Cutting diameter flat: 400x330 mm Saw blade length: 4570 x 34 x 1.1 mm Table height: 800 mm Band speed: 20 - 100 m/min Total power requirement: 3.7 kW Machine weight: approx. 2.35 t Dimensions (L x W x H): 2.23 x 2.15 x 1.8 m SPECIAL OFFER PRICE!!!! 2-column high-performance bandsaw machines from the SBS series The SBS series impresses with advanced technology, high quality, long service life, and exceptionally comprehensive standard equipment. • Modern SNC 20 control system for CNC models • Frequency-controlled saw drive • Control buttons with pictograms • Work light • Powered chip brush • Hydraulic band tensioning • Adjustable clamping pressure Iiedpfx Aajfb Nbgotjd • Double vice (before and after the blade) • Creep mode for positioning • Bundle clamping prepared for electric and hydraulic operation • Chip conveyor The SNC 20 control allows convenient and straightforward entry of up to 20 different sawing tasks (length and quantity). When entering the desired dimension, the control automatically calculates the cutting allowance and the number of feed cycles. In addition, the error code display system enables quick diagnosis for troubleshooting.

Būklė: naujas, Cutting diameter round: 460 mm Cutting diameter square: 460 mm Cutting diameter flat: 460 x 460 mm Saw band dimensions: 5450 x 41 x 1.3 mm Table height: 800 mm Band speed: 20 - 100 m/min Total power requirement: 5.5 kW Machine weight approx. 3.2 t Iedpfjfg E Hvsx Aatsid Dimensions (L x W x H): 2,675 x 2.15 x 2.05 m SPECIAL OFFER PRICE!!!! 2-column high-performance bandsaw machines from the SBS series The SBS series stands out through advanced technology, premium quality, durability, and an unparalleled comprehensive standard configuration. • Modern SNC 20 control system in CNC version • Frequency-controlled saw drive • Control buttons with pictograms • Work light included • Powered chip brush • Hydraulic blade tensioning • Clamping pressure regulation • Double vice (before and after the saw blade) • Inch mode for positioning • Electrical and hydraulic bundle clamping provision • Chip conveyor The SNC 20 control system allows easy and straightforward input of up to 20 different sawing tasks (length and quantity). When the desired length is entered, the control system automatically calculates cutting allowance and the number of feed cycles. The error code display system also allows for quick fault analysis and troubleshooting.

Būklė: naujas, Cutting capacity at 90 degrees: round 510 mm Cutting capacity at 90 degrees: square 480 mm Cutting capacity at 90 degrees: rectangle 610 x 450 mm Saw blade length: 5320 x 34 x 1.1 mm Blade speed: 15 - 100 m/min Table height: 820 mm Total power requirement: 3.0 kW Machine weight approx. 2.3 t Space requirement approx. 2.65 x 2.8 x 2.2 m For mitre cuts up to 45° to the left in fully automatic mode and up to 60° to the left in semi-automatic mode Material height probe (automatic cut start detection) Automatic feed unit via ball screw spindle, incremental feed with automatic length compensation Probe on the saw blade for automatic adjustment of the saw stroke Fully automatic control of saw frame and clamping device Hydraulic unit with automatic pressure shut-off in idle mode Mechanical chip removal brush, feed clamping vice opening on both sides Remnant piece length 100 mm Modern CNC control, freely programmable for multiple sawing jobs with various cut lengths and quantities. Automatic feed unit 500 mm via ball screw spindle, incremental feed with automatic length compensation. Adjustable for cut lengths from 25 to 9,999 mm. Fully hydraulic control of the saw frame and clamping devices Preselection of 3 different material feed speeds Visualization of the entire workflow with simple data entry Iodpfx Aefu Nbbjatjid

Būklė: naujas, Cutting capacity at 90°: round 255 mm Cutting capacity at 90°: square 240 mm Cutting capacity at 90°: rectangle 300 x 180 mm Saw blade length: 2,765 x 27 x 0.9 mm Table height: 870 mm Blade speed: 18 – 110 m/min Control system: CNC Total connected load: 1.5/1.8 kW Machine weight approx.: 0.63 t Space requirement approx.: 1.8 x 1.85 x 1.85 m Mitre band saw, fully automatic GBS 255 Super VA-I CNC • Mitre left 45°: fully automatic operation • Mitre left 60°: semi-automatic operation (cuts without programming) • Material height sensor (automatic cut start detection) • Frame and gearbox made from a single casting: very quiet, low vibration cutting • Removable chip tray (cleaning/disinfection) • Shockproof and ergonomic control panel with oil-resistant EPDM cover • High-performance positioning with incremental encoder (CNC) • Top access to saw, material, and feed unit Iiedpfsd Iipzsx Aatjd • Folding safety cover • Fine adjustment of feed rate • Semi-automatic cut! • Optimize workflows with CNC control Input options for various parameters such as quantities and material lengths, automatic calculation of the kerf • CNC control for 10 different sawing programs with 99 subprograms for various lengths and quantities, e.g., one cutting program with multiple cut lengths • Automatic feed unit (CNC) via ball screw spindle with incremental feed and automatic length compensation. Adjustable for cut lengths from 2 mm to 9,999 mm, residual piece length 170 mm.

Būklė: naujas, Cutting capacity at 90°: round 310 mm Cutting capacity at 90°: square 280 mm Cutting capacity at 90°: rectangle 400 x 250 mm Saw band length: 4020 x 34 x 1.1 mm Band speed: 18 - 100 m/min Table height: 890 mm Total power requirement: 2.2 kW Machine weight: approx. 0.99 t Space requirements: approx. 1.85 x 2.2 x 2.0 m Iiodpfx Asd Iiproatod Mitre band saw, fully automatic, GBS 310/400 VA-I CNC • Mitre cut left 45° automatic operation • Mitre cut left 60° semi-automatic operation (manual cuts without programming) • Material height sensor (automatic detection of cut start) • Frame and gearbox cast as one piece, very quiet operation and minimal vibrations • Removable chip tray (for cleaning) • Shockproof and ergonomic control panel with oil-resistant EPDM cover • Excellent accessibility to saw, material, and feed unit • Safety cover foldable • Fine adjustment of feed • Semi-automatic cutting! • With CNC control for workflow optimization Input options for parameters such as quantities and material lengths, automatic deduction of kerf • CNC control for 10 different sawing programs with 99 subprograms for various lengths and quantities, e.g. one cutting program with diverse section lengths • Automatic feeding unit (CNC) via ball screw, incremental feed with automatic length compensation. Adjustable for section lengths from 2 mm to 9,999 mm, minimum end piece 170 mm.

Būklė: naujas, Cutting capacity at 90°: round 305 mm Cutting capacity at 90°: square 260 mm Cutting capacity at 90°: rectangular 350 x 200 mm Saw blade length 3375 x 27 x 0.9 mm Blade speed 18 - 100 m/min Table height 880 mm Total power requirement 1.5/1.8 kW Machine weight approx. 0.84 t Space requirement approx. 1.85 x 1.9 x 2.0 m Fully automatic mitre band saw • Mitre left 45° automatic operation • Mitre left 60° semi-automatic operation (cuts without programming) • Material height sensor (automatic cut start detection) • Frame and gearbox cast in a single piece, very quiet and low-vibration cutting • Removable chip tray (designed for cleaning/disinfection) • Shockproof and ergonomic control panel with oil-resistant EPDM cover Iiedpoupw R Asfx Aated • Excellent accessibility to saw, material and feed unit • Foldable safety guard • Fine feed rate adjustment • Semi-automatic cutting! • CNC control for optimized workflows Allows input of various parameters such as quantities and material lengths, automatic calculation of the kerf • CNC control for 10 different sawing programs with 99 sub-programs for various lengths and quantities, e.g. one sawing program with multiple cut lengths • Automatic (CNC) feed unit via ball screw with incremental feed and automatic length compensation. Adjustable for cut lengths from 2 mm to 9,999 mm, minimum remnant length 170 mm. Including: - Micro-spraying device - Leveling elements

Būklė: naujas, Saw blade diameter: 370 mm Cutting range at 90°: round 120 mm Cutting range at 90°: square 100 mm Cutting range at 90°: rectangle 180x100 mm Working height: 925 mm Saw blade speeds: 17 - 70 rpm Total power requirement: 3.0 kW Space requirement approx.: 1.9 x 1.45 x 2.1 m SPECIAL OFFER PRICE!!! High-performance vertical circular saw, hydropneumatic fully automatic. (20195) · Mitre cuts left 60° and right 45° · Hydropneumatic control of the sawing unit · Electro-pneumatic material feed unit · Smooth-running, high-performance worm gear drive with large transmission ratio, integrated in a robust cast housing for optimum cutting results · Vise with double clamping arm for low-burr cutting, additionally equipped with rapid lateral adjustment for angle changes Isdpod Iin Eofx Aateid · Precision prism guide for the gearbox head, laterally adjustable · Especially robust base frame with built-in automatic cooling system · Large chip collection drawer · Chip removal brush integrated in the saw blade guard CNC control system: · Keypad for over 90 different sawing programs with 99 subprograms for length, quantity, and angle · Automatic feed unit 2,000 mm via ball screw spindle, incremental feed with automatic length compensation. Adjustable for cut lengths from 25 – 9,999 mm. · Fully hydraulic control of saw frame and clamping devices · Preselection of 3 different material feed rates · Visualization of the entire work process with simple data entry PLEASE NOTE: Price does not include saw blade! (Saw blade price: €204)

Būklė: naujas, Cutting diameter: 305 mm Cutting capacity at 90° (flat): 350 x 200 mm Cutting capacity at 90° (square): 260 mm Cutting capacity at 45° (flat): 230 x 200 mm Iedpfoxabacox Aateid Cutting capacity at 45° (round): 250 mm Cutting capacity at 45° (square): 230 mm Cutting capacity at 60° (flat): 170 x 100 mm Cutting capacity at 60° (square): 155 mm Cutting capacity at 60° (round): 175 mm Blade speed range: 18 – 110 m/min Saw blade dimensions: 3,375 x 27 x 0.90 mm Working height: 880 mm Total power requirement: 1.5 / 1.8 kW Machine weight approx.: 840 kg Space requirements approx.: 1,900 x 1,850 x 2,000 mm Equipment: - Mitre cutting left 45° automatic operation - Mitre cutting left 60° semi-automatic operation (cuts without programming) - Material height sensor (automatic cut start detection) - One-piece cast frame and gearbox - Very quiet operation and extremely low vibration - Removable chip tray (for cleaning/disinfection) - Shock-proof and ergonomic control panel with oil-resistant EPDM cover - Optimized accessibility to saw, material, and feed unit - Foldable safety cover - Fine adjustment of feed rate - Semi-automatic cutting BERG SCHMID CNC Control: - Input options for various parameters such as quantity and material lengths, automatic kerf compensation - For 10 different sawing programs, with 99 sub-programs - For various lengths and quantities, e.g., one sawing program with multiple cut-off lengths - Incremental feed with automatic length compensation - Adjustable for cut-off lengths from 2 mm to 9,999 mm, remnant length 170 mm - Single stroke feed carriage 500 mm Manufacturer’s information: When installing this saw in a network with a residual current circuit breaker (RCCB), make sure to use a type sensitive to all currents and not rated below 300 mA.

Būklė: naudotas, Saw blade diameter: 350 mm Cutting range at 90 degrees: round 120 mm Cutting range at 90 degrees: square 110 mm Cutting range at 90 degrees: flat 200x88 mm Cutting range at 45 degrees: round 115 mm Cutting range at 45 degrees: square 110 mm Cutting range at 45 degrees: square 150x80 mm Total power requirement: 1.5/1.8 kW Machine weight: approx. 0.59 t Dimensions (L x W x H): 1.1 x 0.95 x 1.7 m SPECIAL PRICE for new machines incl.: - Starter Kit 2 - Micro spray unit Demonstration ready in our showroom! Roller conveyors optional! Hydropneumatic Fully Automatic Ieded Iinyspfx Aateid · Mitre cuts left/right · Head angular cuts up to 45° (bevel) · Pneumatic vertical clamping device · Vice before and after the saw blade for burr-free cuts · Material hold-down roller · Integrated coolant spray device · Chip extraction nozzle at saw blade guard · Single feed 530 mm · Cutting length min. 4 mm max. 9,999 mm Use of our B & S Coolmatic Plus is mandatory for profile cutting operations. CNC Control: · With selector for over 90 different sawing programs with 99 sub-programs for length, quantity, and angle · Automatic feed unit, 2,000 mm via ball screw spindle. Incremental feed with automatic length compensation. Adjustable for cutting lengths from 25 – 9,999 mm. · Fully hydraulic control of saw frame and clamping devices · Pre-selection of 3 different material feed speeds · Visualisation of the entire work process with simplified data entry

Gamybos metai: 1994, būklė: paruoštas naudoti (naudotas), Parduodamas pilnai atnaujintas CNC šalto pjovimo diskinis pjūklas „Kaltenbach“ su ilgio ribotuvu L45NC. Atnaujinimo metai: 2016, didžiausias įstrižo pjūvio ilgis: 1000 mm, kampo reguliavimas: +/-90°, pjovimo disko matmenys X/Y/Z: 400 mm/3,2 mm/40 mm, didžiausias pjovimo skersmuo: 130 mm, didžiausias stačiakampio formos medžiagos pjovimo plotis: 315 mm/40 mm, didžiausias kvadratinio profilio medžiagos pjovimo plotis: 120 mm/120 mm, pjovimo greitis: 3000 m/min, pjovimo disko padavimo diapazonas: 0–1100 mm/min, didžiausias medžiagos padavimo greitis: 10 m/min, mašinos matmenys X/Y/Z: apytiksliai 2350 mm/1250 mm/1800 mm, svoris: apytiksliai 1900 kg. Yra dokumentacija. Galima apžiūrėti vietoje. Iisdpfx Ajzi Ehveated

Gamybos metai: 2012, būklė: naudotas, Maks. pjūklo disko skersmuo: 530 mm Pjovimo pajėgumas 90°: apvalus 180 mm, kvadratas 170 mm, stačiakampis 380x70 mm Pjovimo pajėgumas 45° kairėn: apvalus 180 mm, kvadratas 150 mm, stačiakampis 290x70 mm Pjovimo pajėgumas 45° dešinėn: apvalus 180 mm, kvadratas 150 mm, stačiakampis 290x70 mm Iisdjzabmqopfx Aatjd Skaitmeninis kampo indikatorius pjovimo stalui Pjovimo stalo pasukimo diapazonas: 180° Purškimo įrenginys Valdymas dviem rankomis

Gamybos metai: 2008, būklė: paruoštas naudoti (naudotas), Galima visiškai automatinė didelės spartos Bewo vamzdžių žiedinė pjovimo staklė. Apvalių vamzdžių skersmens diapazonas: 8 mm–90 mm, min. kvadratinio profilio matmenys X/Y: 10 mm/10 mm, maks. kvadratinio profilio matmenys X/Y: 80 mm/80 mm, padavimas: 50 m/min–300 m/min, pjūklo disko skersmuo: 350 mm, maks. našumas: 8000 vnt./val., maks. vienu metu apdorojamų vamzdžių skaičius: 4. Yra dokumentacija. Galima apžiūra vietoje. Isdpfxey Nm Umo Aatoid

Gamybos metai: 1999, būklė: paruoštas naudoti (naudotas), Saw blade diameter: 350 mm, cutting capacity at 90°: round: 110 mm, square: 85 mm x 85 mm, flat: 180 mm x 85 mm. Cutting capacity at 45°: round left/right: 105 mm/110 mm, square left/right: 85 mm x 85 mm/85 mm x 85 mm, flat left/right: 130 mm x 85 mm/130 mm x 85 mm. Saw blade bore: 40 mm, speed: 74 rpm, working height: 925 mm. Dimensions (L x W x H): 1150 mm x 1500 mm x 2100 mm, weight: approx. 500 kg. Isdpfx Astufcdoateid

Būklė: naudotas, Mitre saw BERG & SCHMIDT Junior 275 -used- Underframe, Mobility kit ----- Technical specifications ----- Iijdpsu R S I Hsfx Aated Cutting height: 60 mm, Voltage: 230 V

Būklė: naudotas, Gamybos metai: 1996, Disko skersmuo: 300 mm Maksimalus pjūvio gylis: 100 mm Pjūvio diapazonas 45 laipsnių kampu: plokščias – 105 x 80 mm Pjūvio diapazonas 45 laipsnių kampu: apvalus – 100 mm Pjūvio diapazonas 60 laipsnių kampu: plokščias – 80 x 70 mm Pjūvio diapazonas 60 laipsnių kampu: apvalus – 90,0 mm Disko matmenys: 300 x 2,5 x 40 mm Disko skylės skersmuo: 40,0 mm Eiga: 150 mm Pjovimo greitis: 17 + 33 aps./min. Įtampa: 400 V Svoris: 340 kg Matmenys (ilgis x plotis x aukštis): 1000 x 800 x 1600 mm Įranga: - Staklių korpusas su integruota aušinimo sistema - Vertikalus disko galvutės kreipiantis - 2 greičiai - Didelė medžiagos atrama ir diskas - Dvigubas kampinis reguliavimas abiejose pusėse: kairėje – 60°, dešinėje – 45° Isdpfx Aszl E Twoatjid - Užspaudimo įtaisas su greitojo šoninio reguliavimo mechanizmu ir dvigubu užspaudimo žnyklu - Tikslus reduktoriaus galvutės kreipiantis prizminiu principu - Naudojimo instrukcija

Būklė: paruoštas naudoti (naudotas), Parduodu naudotą metalo juostinį pjūklą Berg & Shmit modelis DGS 350/HA. Įrenginys geros techninės būklės, paruoštas naudojimui. Tinka įvairių tipų metalams pjauti. Tvirta konstrukcija užtikrina stabilumą ir pjovimo tikslumą. Kaina be PVM, PVM 23%. Pjovimo našumas x320 45° 320 320x300 Isdezdanhspfx Aateid Variklis 2,2 kW Pjūklelis 4250x27 arba 34x0,9/1,1 Svoris 930 kg

Būklė: naujas, Gamybos metai: 2024, pjūklo disko skersmuo: 315 mm, pjovimo aukštis (maks.): 150 mm, Apvalaus plieno pjovimo diapazonas ties 45°: 108 mm, Apvalaus plieno pjovimo diapazonas ties 90°: 108 mm, sukimosi greitis (min.): 17 aps./min, sukimosi greitis (maks.): 33 aps./min, BERG+SCHMID Vertical Circular Saw Model VKS 315 Speed: 17 + 33 rpm • Mitre cuts: left 60° / right 45° • Vise with double clamping arm (4-point locking) for burr-free cuts and quick side adjustment • Saw table with large rotary plate and particularly robust vise for optimal material clamping • Sturdy prism guide for the saw head (adjustable dovetail guide) • Automatic coolant system • Machine base with chip drawer • Metal handle for high clamping force • Backstop with spring pack, etc. Iijdpfxorrvn Ae Aated Saw blade dimensions: 315 x 40 mm Additional accessories such as saw blades, roller conveyors, measuring stops, minimum quantity lubrication systems, etc. available upon request! Delivery time: ex stock Waiblingen Beinstein

Būklė: naudotas, Curved roller conveyor, curved conveyor, curve roller conveyor, curved roller run, curve roller conveyor, roller curve, powered curved conveyor, roller conveyor, curve roller conveyor -Manufacturer: Schmid Fördertechnik, 90° powered curve roller conveyor -Housing: Stainless steel -Rollers: Ø 55–85 x 500 mm Ijdetvb Eyspfx Aatoid -Speed: 15 m/min -Drive: SEW-Eurodrive, see photo of nameplate -Conveyor width: approx. 500 mm -Transport dimensions: 2000/1200/H830 mm -Weight: 141 kg with pallet

Būklė: labai geros būklės (naudotas), Boring head, spindle head, drilling head, parting-off boring head, parting-off head, spindle drilling head, counterboring head, universal drilling head, boring tool, facing head -Manufacturer: Schmid, facing and boring head -Type: UBS Gr.1 -Taper: SK40 Iiodpfx Asrzvwwjated -Setting accuracy: 0.02 and 0.01 mm -Accessories: see photos -Case dimensions: 240/125/H100 mm -Total weight: 4.0 kg

Būklė: geras (naudotas), Clamping table, clamping angle plate, dividing apparatus, dividing head, rotary table, milling machine table, clamping angle plate with three-jaw chuck, clamping angle plate with lathe chuck -Manufacturer: Schmid, rotary table with three-jaw chuck -Type: TWS200 -Chuck size: Ø 200 mm -Dimensions: 250/250/H365 mm Ijdpfxoii E Tno Aatjid -Weight: 52 kg

Būklė: geras (naudotas), Išplėtimo galvutė, veleno galvutė, gręžimo galvutė, griovelio gręžimo galvutė, griovelio galvutė, veleno gręžimo galvutė, išgręžimo galvutė, universali gręžimo galvutė, išplėtimo įrankis, plokštuminė galvutė - Gamintojas: Schmid, plokštuminė ir išplėtimo galvutė - Tipas: S.AdK 6 Iijdpfx Aexdwx Asatsd - Tvirtinimas: SK50 - Tikslumo reguliavimas: 0,01 mm - Matmenys: 175/150/H305 mm - Svoris: 24 kg

Būklė: geras (naudotas), Išsukimo galvutė, veleno galvutė, gręžimo galvutė, įleistinė gręžimo galvutė, įleidimo galvutė, veleno gręžimo galvutė, išgręžimo galvutė, veleno įrankis, plokštuminė ir išsukimo galvutė Vidutinis, plokštuminės ir išsukimo galvutės tipas - Tvirtinimas: MK4 Isdpem Dyhmsfx Aateid - Matmenys: 222/87/80 mm - Svoris: 3,1 kg