Used Biesse Intermac Machining Center for sale (70,814)

Condition: excellent (used), Year of construction: 2023, functionality: fully functional, For sale: a complete iGolden 02P-WVQ 4-axis nesting CNC production line from 2023, designed for automated cabinet and furniture production. The installation consists of four interconnected components that together form a continuous production line: 1. Automatic sheet lift 2. Automatic labeling machine 3. 4-axis CNC nesting machine 4. Automatic unloading and output table Cedpfxov Dupve Ab Dorg The line automates the loading, labeling, processing, and unloading of sheet material. This reduces manual handling and allows for the creation of an efficient and streamlined production flow. Included in the delivery: - Dust extraction system - Vacuum pump for the CNC bed - ISO30/ER32 tool holder - Haixun Quick Design 3D cabinet software - Haixun Quick Production production software - Spare parts - Stock of labels Dimensions: - Control cabinet: approximately 80 × 60 × 190 cm - Dust extraction system: approximately 140 × 80 × 140 cm - Labeling machine: approximately 4,000 × 2,700 × 1,800 mm A complete solution for companies that want to automate sheet metal processing and cabinet production, from sheet input and labeling to CNC machining and output.

Condition: used, Year of construction: 2019, machine/vehicle number: 0191, For sale: Fenstek Emerald F260, a 4-axis CNC profile machining center from 2019, designed for the precise machining of long aluminum and plastic profiles. Thanks to its working range of up to 7,000 mm and the powerful 9 kW HSD spindle, this machine is particularly suitable for window, door, and facade production. The machine comes from a professional production environment, has been well maintained, is damage-free, and is fully operational. Inspection and a demonstration under power are possible. Key specifications: - Axes: X / Y / Z / A, 4-axis interpolation - Control: PA8000 - Spindle: HSD, 9 kW - Maximum speed: 24,000 rpm - A-axis rotation: +90° to -90° - Working range: up to 7,000 mm, depending on the clamping configuration - Tool magazine: ISO30, 9 positions - Operations: milling, drilling, tapping, grooving, and chamfering Cjdpox R U Eijfx Ab Djrg - Suitable materials: aluminum profiles, light alloys, and uPVC An interesting machine for companies that want to machine long profiles flexibly and in a single setup.

Condition: used, YOM 2004 Mazatrol PC Fusion 640 M Axis X 1660 mm Axis Y 510 mm Axis Z 510 mm Table length 2000 mm Table width 510 mm Max. part weight 1000 kg Number of tool pockets 30 Cedpev Ax Uyefx Ab Derg Spindle taper CAT 40 Max. spindle speed 10000 rpm Spindle motor power 18.5 kW

Condition: used, Year of construction: 2012, GENERAL FEATURES: CNC machining center with a fixed machine table and a moving tool carrier in a portal design for drilling and milling operations on panels made of various materials (chipboard, MDF, solid wood, plastic, etc.). MACHINE STRUCTURE: The base structure is a monolithic design made of thick-walled material, reinforced by welded-in parts across the entire machine bed, making it extremely stable. The table design, with a large base, ensures long-lasting precision and stability. The machine layout allows the user an optimal workflow despite a minimum of space. The mobile portal carrier is made from a solid monoblock. It is positioned in the X-direction on prismatic, ground guides using ball screw slides. On this mobile tool carrier, the working unit is in turn attached to prismatic, ground guides and the ball screw slide. Axis movement is achieved using "brushless" motors in the X/Y/Z axes. The drive system operates in the X-axis via a pre-tensioned precision rack and pinion drive, and in the Y/Z axes via ground ball screws of the highest precision class. AXIS MOVEMENT: The movement of all axes takes place on prism linear guides with a large cross-section and ball screw shoes with a large contact surface, which ensure optimal sliding even at the highest speeds and accelerations. The precise and rapid positioning of the moving portal (X-axis) is achieved by a pinion and rack with helical teeth. Ball screws with a large cross-section ensure the accurate positioning of the working unit along the moving portal (Y and Z axes). The perfect mechanical dynamics and maximum positioning accuracy are controlled by high-quality drives and brushless motors. STANDARD MACHINE DESIGN: Milling spindle with 5-axis positioning, 11kW (15HP), HSK63, 1200-20000 RPM. The machining unit consists of a powerful 11 kW (15 HP) motor, which is liquid-cooled and capable of 5-axis positioning. This feature enables machining operations to be performed with a tool that can be oriented in any direction; therefore, fewer angular movements are required. The base structure of the milling unit is based on a design with two non-orthogonal axes that intersect next to the tool. This feature guarantees a robust carrier for heavy-duty milling applications. Thanks to the non-orthogonal axes, it is possible to perform numerous repositionings without using too much space. This allows the machining of complex geometries without the risk of collision with the workpiece and achieves an angle of -10° in relation to the machine table. All machining operations are facilitated by the small dimensions of the group in relation to the rotation axis of the spindle: when the group is in a horizontal position, the dimension is only 35mm. WORK TABLE TV: The work table is designed to guarantee the operator maximum "freedom of movement." The vacuum quick-change clamping system provides maximum flexibility with precise positioning and optimal work piece holding. The table consists of moving consoles that are adjusted in the X-axis on ground guides with ball screw shoes and a special profile to ensure Crjdpfxjzrvvvs Ab Dsg

Condition: reconditioned (used), Year of construction: 1985, In 2020, the machine underwent a comprehensive overhaul for €7,000. Documentation is available. Work processes: - Chamfering 60° - Longitudinal turning up to a maximum of 40 mm - Center drilling Fully automatic work sequence: - Clamping, tool holder closed - Rapid traverse forward - Working feed Credpfxeiamn Se Ab Dog - Dwell time for cutting - Rapid traverse back - Releasing, tool holder open Technical data: Max. workpiece diameter (round) 80 mm Max. workpiece diameter (6-sided) 70 mm Min. workpiece diameter (round and 6-sided) 10 mm Min. workpiece length 450 mm Speed range, infinitely variable Stage I / Stage II = 51-306 / 102-612 Electrical equipment 220/380 V, 50 Hz Motor power, main motor kW 1.3 / 1.8 Motor power, coolant motor kW 0.07 Required air pressure 6-8 bar Weight approx. 520 kg Dimensions: L 1520 mm x W 610 mm x H 1350 mm Roller conveyor

Condition: excellent (used), Year of construction: 1998, functionality: fully functional, Control: Mazatrol M Plus Travel paths: x-1660 y-760 z-660 mm Clamping surface to spindle head: 155 – 815 mm Codpfevrxd Hsx Ab Derg Distance from column to spindle center: 808 mm Spindle inner taper: SK 40 Tool changer: 24 – compartment Spindle speeds: 7000 rpm Usable table area: 2000 x 760 mm Table load: 1000 kg Rapid traverse x, y axis: 24000 mm/min Rapid traverse z axis: 20000 mm/min Feed: 1 – 5000 mm/min Machine weight: approx. 8700 kg including chip conveyor, coolant system The machine can be inspected under power.

Condition: excellent (used), Year of construction: 2019, functionality: fully functional, simultaneous 5-axis version - SIEMENS 840 D SL control - Working range X= 780, Y= 600, Z= 520 mm - C-axis 360° - B-axis -50°/+110° - Table clamping surface 720 x 540 mm Crjdpfjr T S Nhox Ab Dsg - Spindle speed 20 - 15,000 1/min - Tool magazine 60 places - HSK 63A tool holder - High pressure system IKZ 40 bar - Measuring probe 3D Weight 8,100 kg

Condition: used, Year of construction: 2004, machine/vehicle number: IntNr231232, Hermle C600 U, year of manufacture 2004 Spindle new, with commissioning report Control system: - Heidenhain iTNC 530 - Control system operating hours: 68026 - Machine operating hours: 81237 - Spindle operating hours: 12429 Spindle: - Speed: 16,000 rpm - Tool holder: SK-40 - 30 tool magazine positions Equipment: - Rigid clamping table - NC rotary table, 4th axis (iTNC) - Coolant system - Chip conveyor: none - Electronic handwheel (iTNC) - Tool breakage monitoring - Chip flushing nozzle - Foot switch for clamping/unclamping - Hydraulic unit for clamping/unclamping Travel paths: - X-axis (longitudinal): 600 mm - Y-axis (transverse): 450 mm - Z-axis (vertical): 450 mm Table: Cedpozx Rvksfx Ab Derg - Clamping area: 800 mm x 465 mm - Maximum table load: 250 kg Axes: - Axis rapid traverse: 35 m/min - Acceleration: 5 m/s² - Measuring system X/Y/Z: 0.1 µm Dimensions & Weight: - Machine weight: approx. 6.8 t - Machine dimensions (W x D x H): 2.5 m x 2.4 m x 2.43 m The machine can be inspected under power by appointment. Subject to changes, errors in technical data and specifications, and prior sale!

Condition: good (used), Year of construction: 2002, Control HEIDENHAIN TNC 430 Spindle speed 20 - 9,000 rpm Crjdewglfxopfx Ab Dsg Travel X= 500, Y= 400, Z= 400 mm Tool holder SK 40 Tool changer with 16 stations Rotary table with B and C axes Travel measuring system with correction Clamping surface Ø 700 x 500 mm Max. table load 200 kg Infrared probe for workpiece measurement A lot of aluminum has been machined!

Condition: used, Year of construction: 2009, total height: 2,500 mm, total length: 40,500 mm, total width: 2,400 mm, Colour: Blue Empty weight: 30.900 kg Price: On request 4 tool changers, 24 pcs each Plus external magazine 117 positions Drilling unit 2, 4x horizontal only Incl. Oertli tools Max. machining length 6 meters NEXUS Software (HMI) Output table 320x360 cm Operating hours cannot be read out - Year: 2009 - Documentation available: Yes - └ Type Documentation: Electrical diagrams - CE marking present: Yes - CE certificate present: No - Serial number: 113040 - Number of milling spindles [pcs.]: 6 - └ Milling spindle 1: - - Number of controlled axes [pcs.]: 3 - - Min. spindle speed [rpm]: 0 - - Max. spindle speed [rpm]: 18000 - - Main motor power [kW]: 20 - └ Milling spindle 2: - - Number of controlled axes [pcs.]: 3 - └ Milling spindle 3: - - Number of controlled axes [pcs.]: 4 - - C-axis present: Yes - └ Milling spindle 4: - - Number of controlled axes [pcs.]: 4 - - C-axis present: Yes Cjdjzt Nadjpfx Ab Djrg - Tool holder: HSK-F63 - Drilling unit present: Yes - └ Motor power [kW]: 2.5 - └ Horizontal drill spindles [pcs.]: 4 - └ Vertical drilling spindles [pcs.]: 6 - Tool changer positions [pcs.]: 24 - System/software: Nexus - Safety feature: Enclosed fence, Door interlock switches - Tools included: Yes - CNC options: Unloading system, Loading system, Label machine - Table length [mm]: 6000 - Table width [mm]: 3800 - Installed length [mm]: 26000 - Installed width [mm]: 9500 - Installed height [mm]: 2850 - Transport dimensions: 40500mm x 2400mm x 2500mm (l x w x h) - Transport weight [kg]: 30900kg Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Yorick Diebels

Condition: good (used), Year of construction: 2015, operating hours: 24,272 h, functionality: fully functional, travel distance X-axis: 1,270 mm, travel distance Y-axis: 610 mm, travel distance Z-axis: 720 mm, torque: 406 Nm, controller manufacturer: Heidenhain, overall weight: 11,800 kg, number of slots in tool magazine: 24, Equipment: chip conveyor, documentation/manual, MAS KOVOSVIT MCV 1270 Power Year of manufacture: 2015 Heidenhain iTNC 530 control system X-axis: 1270 mm, Y-axis: 610 mm, Z-axis: 720 mm Tool changer with 24 positions, SK50 Spindle speed up to 8000 rpm Spindle torque 406 Nm / 100% Crodpfezydarox Ab Deg 623 Nm / 40% Chip conveyor IKZ 20 BAR (internal cooling system) Weight: 11800 kg

Condition: used, Year of construction: 2004, Technical details: x-travel: 750 mm y-travel: 600 mm z-travel: 560 mm switched on hours: 78.328 h spindle hours: 38.073 h control: Heidenhain iTNC 530 Credszp Dvropfx Ab Djg tool changer with: 30 Plätze tool taper: HSK-A 63 feed speeds infinitely variable: 90 mm/min rapid traverse:: 90 m/min table-size: 950 x 650 mm table load capacity: 1000 kg total power requirement: 73 kVA Weight approx.: 11,0 t dimension machine approx.LxWxH: 4,9 x 4,3 x 3,15 m The DECKEL MAHO DMC 75 V linear is a highly precise vertical CNC machining center equipped with linear drive technology, making it ideal for 3-axis machining. *

Condition: used, Year of construction: 2018, x-travel 750 mm y-travel 660 mm z-travel 650 mm Control Siemens spindle tunring speed 12.000 U/min tool taper HSK 63 The machine was used for machining aluminum and, in our assessment, is in good used condition. It can be inspected under power by appointment. Crodoyrt A Iopfx Ab Djg Technical features & accessories: - Twin spindle - 5-axis - Pallet changer Accessories, tools, and clamping devices shown are only included if explicitly stated in the additional information. Technical data and specifications are subject to change without notice. Prior sale is reserved.

Condition: used, Year of construction: 2018, Colour: White Empty weight: 7.500 kg Price: On request CNC machining centre SCM ACCORD 25 FX Brand SCM Type ACCORD 25 FX  Year of construction 2018 Machine no. AA10000992 Machining table dimensions 5020x1380 mm (LxW) Worktable equipped with 2 vacuum fields Worktable equipped with 2 reference lugs Including 8 reference lugs and 8 supports  Speed XY, vector 35 m/min Movement axes Maximal speed X axis 25 m/min (pro space) Maximum speed X axis 90 m/min (pro speed) Maximum speed Y axis 90 m/min Maximum speed Z-axis 30 m/min Control unit Machine control KVARA control Windows Embedded Standard 7-64bit Hard disk storage capacity 500GB-7200rpm Microprocessor Intel Pentium-2.9GHz RAM memory 8GB-DDR4 XILOG-MAESTRO software package Including vacuum pump  Motor power 5.5 kW Pump capacity 250m3/hour Vacuum pressure maximum 0.9 bar Crjdjycwupepfx Ab Djg Total dimensions 9000x4500x3000 (LxWxH) Total weight 7,500 KG.  - Year: 2018 - Documentation available: No - CE marking present: Yes - CE certificate present: No - Serial number: AA10000992 - Number of milling spindles [pcs.]: 2 - └ Milling spindle 1: - - Number of controlled axes [pcs.]: 3 - - Min. spindle speed [rpm]: 6000 - - Max. spindle speed [rpm]: 18000 - - Main motor power [kW]: 15 - └ Milling spindle 2: - - Number of controlled axes [pcs.]: 3 - - Min. spindle speed [rpm]: 600 - - Max. spindle speed [rpm]: 24000 - - Main motor power [kW]: 12 - Type milling table: Beam table - Tool holder: HSK-F63 - Tool changer positions [pcs.]: 12 - System/software: SCM Maestro - Safety feature: Bumper guard - Vacuum pump present: Yes - └ Number [pcs.]: 1 - └ Brand: Becker - └ Main motor power [kW]: 5.5 - └ Capacity [m³/h]: 250 - CNC options: Offcut conveyor - Table length [mm]: 5020 - Table width [mm]: 1380 - Working range X [mm]: 5020 - Working range Y [mm]: 1300 - Z-axis working range [mm]: 250 - X-axis maximum stroke [mm]: 5400 - Y-axis maximum stroke [mm]: 1650 - Z-axis maximum stroke [mm]: 450 - Transport weight [kg]: 7500kg Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Yorick Diebels

Condition: reconditioned (used), Year of construction: 2014, Available immediately Moving column machine FS 480 - Total travel X=4800 mm, ideal for flexible machining of large parts - Travel X=4,800 mm, Y=1,500 mm; Z=3500 mm - iTNC 530 control with wireless HR 550 FS radio handwheel, operator's cabin on the traveling column - 2-axis NC universal drilling and milling head, fully simultaneous and positioning operation per traveling column - HSK-A 100 spindle, 10,000 rpm, 220 Nm spindle torque Crodezxzq Sspfx Ab Dsg - IKZ air up to 6 bar - Dust protection packages to protect the guides and drives - BA 4 per traveling column - Radio measuring probe RMP 60 Renishaw - Work area monitoring with network camera and monitor at the rear of the system - Process monitoring ToolScope basic system - Additional control panel at the rear of the system - Partial enclosure consisting of work area and sheet metal door, rear with safety fence with unobstructed view into the work area - incl. fixators - Cooling units - incl. internal tool cooling (closed cooling circuit) with cooling unit - short delivery time, available immediately, subject to prior sale Inspection possible by arrangement Spindle hours: approx. 9079 SPECIAL PRICE!!!

Condition: used, Year of construction: 2010, operating hours: 9,000 h, functionality: fully functional, travel distance X-axis: 2,000 mm, travel distance Y-axis: 1,500 mm, travel distance Z-axis: 1,250 mm, rapid traverse X-axis: 30 m/min, rapid traverse Y-axis: 30 m/min, rapid traverse Z-axis: 30 m/min, Travel distances X=2000 mm, Y=1500 mm, Z=1250 mm - Siemens 840 DsL CNC control - NC rotary table for 4-sided machining, 1250 mm x 1250 mm - Horizontal spindle HSK100 - Spindle: 2500 rpm, HSK 100, 2200 Nm spindle torque - Approx. 9,500 spindle hours - Tool changer system HSK 100 / 40 stations Crsdpfszxzqxjx Ab Dog - Chip conveyor - Internal/external air blow-off device - Minimum quantity lubrication for dry machining of castings - Full enclosure - Large interference circle 2300 mm - Double pallet changer - Short delivery time, subject to prior sale - Year of construction: 2010 Coolant supply available as an option - ICS 60 bar for deep hole machining

Condition: ready for operation (used), Year of construction: 2006, input voltage: 400 V, number of axes: 4, controller manufacturer: Masterwood, overall weight: 3,800 kg, Masterwood Projekt 415 4 axis CNC machine Working area 3200 x 1335 4 working fields ISO30 10.5 HP spindle C-axis Toolchanger 12 positions 6 supports Schmalz double channel Vacuumcups Codezv S Suopfx Ab Dorg 17" screen Drillinghead 16 spindels (horizontal and vertical) Machine in working condition Pneumatic lifters Vacuümpump Becker Fence left, right and back Safety mats in the front (not checked) WIndows control Masterwork CAD-CAM system Available from 31 of August 2026 Price on request

Condition: used, Year of construction: 2012, operating hours: 25,742 h, functionality: fully functional, coolant supply: 20 bar, number of slots in tool magazine: 30, Equipment: chip conveyor, Used 3-axis machining center with Heidenhain control. Currently still in operation. Will be replaced by a larger machine. Inspection possible by appointment. Crjdpfozyl Nnox Ab Dsg Available at the end of 2026.

Condition: used, Year of construction: 2005, Machining center - screwing - milling with 8 automatic tools loading- and unloading table Credezv S Dkjpfx Ab Dsg

Condition: used, Year of construction: 2005, Mikron UCP1350 Available immediately! Travel: X-axis: 1,350 mm, Y-axis: 1,150 mm, Z-axis: 895 mm A-axis: degrees NC rotary table: 1.100 x 1.000 mm max. table load: 1.600 kg Spindle mount: HSK-A63 tool magazine: 60 seats Spindle speed: 15.000 U/min Control: Heidenhain iTNC530 Internal coolant supply (IKZ): 40 bar Crjdpozycl Hefx Ab Dog

Condition: reconditioned (used), Year of construction: 2004, functionality: fully functional, CNC Vertical Machining Center DECKEL MAHO DMC 64 V linear With Heidenhain iTNC 530 path control Year of manufacture: 2004 Travel ranges: X 640, Y 600, Z 500 Spindle speed range: 0 – 12,000 rpm, continuously variable With the following accessories: Fixed angular table, 850 mm x 600 mm clamping surface Vertical tool changer with 30 magazine slots 3D measuring probe Renishaw Electronic handwheel Crodpfszx Umyex Ab Djg Full enclosure with sliding doors and interior lighting Operating mode 3 + 4 IKZ 40 bar Chip conveyor Chip flushing gun Spiral chip conveyor Coolant system 3 adjustable machine feet Operating manual

Condition: excellent (used), Year of construction: 2007, functionality: fully functional, Heidenhain iTNC 530, working area X 600 x Y 450 x Z 450 mm, spindle mount CAT40, 24-position automatic tool changer, 20,000 rpm spindle, machine weight 6,100 kg, power connection 16 kW, main fuse 32 A, operating voltage 400 V, 50/60 Hz Credpfxew Hxzme Ab Djg

Condition: used, Year of construction: 2016, x-travel 1.020 mm y-travel 700 mm z-travel 500 mm Control Siemens 828D table dimensions 1.050 x 700 mm spindle tunring speed 15.000 U/min tool taper BBT-40 In our assessment, the machine is in good used condition and can be inspected under power by appointment. Accessories, tools, and clamping devices shown are only included in the scope of delivery if this is noted in the additional information. Technical data and specifications are subject to change without notice and errors. Cedpeyw Tm Eefx Ab Dsrg Prior sale is reserved.

Condition: used, Year of construction: 2011, Base Machine M800 X5 TV 1 WORKING RANGE X: 5,020 mm Y: 1,830 mm Z: 675 mm Clearance Height: 300 mm (from 50 mm suction cup height) MACHINE STRUCTURE The base structure is a monolithic construction made from thick-walled steel. It is reinforced across the entire machine bed with welded components, providing exceptional stability. The table design, with its large base, is the key to ensuring lasting precision and stability. The machine’s layout enables the operator to achieve optimal workflow with minimal space requirements. The mobile gantry is built as a solid monoblock. It is positioned in the X direction on prismatic, ground guides with recirculating ball carriages. The machining unit is mounted on this mobile support carriage, also on prismatic, ground guides and recirculating ball carriages. AXIS MOVEMENT All axes travel on prismatic linear guides with large cross-section and recirculating ball shoes with a wide contact surface, which ensures optimal sliding, even at high speeds and accelerations. The precise and fast positioning of the movable gantry (X-axis) is achieved via helical rack and pinion. Large cross-section recirculating ball screws ensure accurate positioning of the machining unit along the movable gantry (Y and Z axes). The perfect mechanical dynamics and maximum positioning accuracy are controlled by high-quality drives and brushless motors. Max. axis speeds: · X-axis = 90 m/min · Y-axis = 90 m/min · Z-axis = 30 m/min Safety device with bumper and light barrier 1 Bumpers with sensors are fitted to the movable upright, and a light barrier system is installed at the front of the machine. If the operator enters the active zone, the X-axis travel speed is reduced to a lower value of 25 m/min without stopping the machine. This system allows parts to be loaded during pendulum operation without the limitation of access areas, as seen with pressure mat systems. This prevents unwanted interruptions in the machining cycle and offers greater freedom of movement around the worktable. CE certification for the safety system 1 Safety protection fence 1 Side and rear protection fence Automatic central lubrication controlled via CNC 1 The lubrication of the X, Y, and Z axes is controlled by the CNC; intervals are regulated automatically, without manual intervention. Central extraction connector 1 All individual extraction connections of the machining units are collected into a central extraction port. Inside the port, there are various slider valves controlled by the NC. This reduces the required extraction air volume. Chip conveyor 1 Maxi – 5-axis electrospindle 11 kW HSK-63 “Prisma K 1 5-axis electrospindle, 11 kW at 20,000 rpm S1 (100% duty cycle) Speed: max. 20,000 rpm Rotation direction: left/right Liquid cooling Tool interface HSK 63F Inverter 18 kW, stepless, smooth power delivery Max. rotation B-axis = 200° (+-100°) C-axis = 650° Thanks to the non-orthogonal axes, it is possible to perform complex horizontal positioning in a small workspace. This enables the machining of complex geometries without the risk of collision. Csdpoxy Tmnofx Ab Dsrg

Condition: used, Year of construction: 2016, Working area: X=3300 mm Y=1280 mm Z=150 mm Clearance height Operator terminal: 24" LED colour display Handheld terminal for axis speed control Software: "Woodflash Vacuum pump 90 m³/h/50 Hz or 108 m³/h/60 Hz Milling spindle 12 kW HSK F63 (12,000 rpm) 12-position linear tool changer on the left of the machine frame + pickup station Drilling head DH 16 4H 2S: Vertical 12 spindles Horizontal 4 spindles 2 grooving saws Storage location: Nattheim Crodsxy Tlwepfx Ab Deg