Used Dmg Dmc 835 V for sale (412)

Condition: ready for operation (used), Year of construction: 2012, General Data Machine weight 21000 kg Main Drive Spindle speed range 18000 Number of axis 5 Movement X-Axis Movement 1000 mm X-Axis Rapid Traverse 60 m/min Y-Axis Movement 1250 mm Y-Axis Rapid Traverse 60 m/min Z-Axis Movement 1000 mm Z-Axis Rapid Traverse 60 m/min Workpiece Workpiece weight 2000 kg Tools Type of tool holder HSK-A63 This 5-axis DMG MORI DMC 100U duoBlock was manufactured in 2012. It features a pallet clamping surface of 1000 × 800 mm, rapid traverse rates up to 60 m/min, and a high-speed spindle at 18,000 rpm. The machine includes a 60-position tool changer and a 980-litre coolant system. Accessories like a chip conveyor, oil mist collector, and BLUM laser tool measurement enhance its functionality. If you are looking to get high-quality milling capabilities consider the DMG MORI DMC 100U duoBlock machine we have for sale. Contact us for more information. Application Types Nkjdex D Eh Eopfx Ah Hst Milling

Condition: ready for operation (used), Year of construction: 2016, operating hours: 11,898 h, General Data Machine weight 5450 kg Control Unit Brand SIEMENS Model 840 Dsl - ShopMill Main Drive Spindle speed range 12000 Tool taper SK40 Number of axis 3 Movement X-Axis Movement 800 mm X-Axis Rapid Traverse 30 m/min Nkodpsx D H Dhofx Ah Hjt Y-Axis Movement 560 mm Y-Axis Rapid Traverse 30 m/min Z-Axis Movement 510 mm Z-Axis Rapid Traverse 30 m/min Workpiece Workpiece weight 800 kg Tools Number of station 30 This 3-axis DMG ecoMill 800 V was manufactured in 2016. It features a robust SK40 spindle with a speed of 12,000 rpm and a 30-station tool magazine. The machine supports a maximum workpiece weight of 800 kg and includes a built-in coolant system with a high-pressure 20 bar filter. Additional features include a swarf conveyor and Renishaw touch probe. If you are looking to get high-quality milling capabilities, consider the DMG ecoMill 800 V machine we have for sale. Contact us for more information. Application Types Milling

Condition: ready for operation (used), Year of construction: 2004, operating hours: 36,700 h, Control Unit Brand SIEMENS Model Sinumerik 840D Powerline Main Drive Number of axis 5 Movement X-Axis Movement 1250 mm Nsdpex D Npgofx Ah Hjkt Y-Axis Movement 880 mm Z-Axis Movement 800 mm Tools Type of tool holder HSK63 Additional Equipment Infrared Scanner Tool Measurement Flushing Gun Internal Coolant Supply (IKZ): 40 bar Tank with Paper Belt Filter: 900 litres This 5-axis DMG GILDEMEISTER DMC 125U universal machining centre was manufactured in 2004. Ideal for complex and precise machining tasks, it offers enhanced flexibility and performance. Consider the opportunity to buy this DMG GILDEMEISTER DMC 125U universal machining centre. Contact us for more information. Application Types Milling

Condition: used, Year of construction: 2008, Technical details: x-travel: 700 mm y-travel: 700 mm z-travel: 700 mm turning speeds: 18.000 1/min max. torque on the spindle: 110 / 84 Nm tool taper: SK 40 control: HEIDENHAIN iTNC 530 tool change unit: 180 fach size of pallet: 500 x 500 mm mm max. workpiece weight: 600 kg spindle: 34 / 28 kW rapid traverse: 60 m/min total power requirement: 68 kVA weight of the machine ca.: 10,5 t dimensions of the machine ca.: 9,5 x 7,5 x 3,4 m horizontal machining center with linear drives,, NC-roundtable, pallet pool RS 10 for totally 12 pallets, monitor for workpiece setting-up device, high pressure coolant through spindle 40bar, internal air blast supply, mode 4, hydraulic clamping 2/4 for workpiece setting-up device and working table, BLUM laser, oilmist suction, 3D touch probe TS 649, tool-breackage control, mechanical, SDS spindle diagnosis system, Nkjdpfon Srxqjx Ah Hot flush gun, el. handwheel, chipconveyor, approx. 112.000 h "machine on", approx. 79.500h "spindle on", *

Condition: used, Year of construction: 2009, Offered here is a used machining center from the manufacturer Deckel Maho DMG. The machine is powered up and can be inspected at our facility. Free loaded on truck Manufacturer: DMG Deckel Maho Model: DMC 125 H duoBlock Year of manufacture: 2009 Control: Siemens 840 D Solutionline (PCU 50) Technical data: Travel distances X-, Y-, Z-axis: 1250 x 1000 x 1000 mm Feed rate X-, Y-, Z-axis: 20 - 60,000 mm/min Rapid traverse X-, Y-, Z-axis: 60 m/min Nkodpfxsw Ew T Sj Ah Hjt B-axis travel: 360 x 0.001° B-axis feed rate: 10,800 °/min Max. rotation of table plate: 30 rpm Spindle speed: 20 - 8,000 rpm Gear stages: 2 Max. workpiece diameter: 1250 mm Max. workpiece height: 1580 mm Clamping surface: 800 x 800 mm Max. workpiece weight: 1,500 kg Weight of pallet: 570 kg Max. permissible weight difference for pallet loading: 1,000 kg Tool holder: SK 50 according to DIN 69871 Max. tool length: 650 mm Tool magazine: 120 positions Transport dimensions: 6,500 x 3,000 x 3,200 mm Transport weight of machine (without magazine or other accessories): approx. 20,000 kg Space requirement: approx. 7,000 x 6,000 mm Total machine weight: 24,000 kg Accessories: Chip conveyor with coolant tank Coolant system 4x machine pallets Tool magazine Oil mist extraction Various new spare parts: 1x Length measuring system Y-axis (new) 1x Lubrication unit 230V 0.12 30 bar (new) 1x ZAHNRADP-AGG*MKF1-KW2-20036 (new) 1x Cyclo gearbox *F1C-A25 (new) 1x Conversion kit power module (new) 1x Lifting devices for the machine

Condition: excellent (used), Year of construction: 1997, Heidenhain Mill-Plus control system Travel paths X/Y/Z: 500 x 380 x 380 mm Clamping surface 500 x 400 mm Nksdpfx Ahsvu Slpe Hjt Tool magazine for 24 tools, SK 40 Speed 8,000 min-1 NC rotary and swivel table Chip conveyor

Condition: excellent (used), Year of construction: 2002, Control Siemens Sinumerik 840D Travel paths X/Y/Z: 560 x 560 x 510 mm Spindle speed 15,000 min-1 Nsdpfswrt Rmsx Ah Hokt 2-fold pallet changer 400 x 400 mm Tool magazine for 40 tools, SK 40 Paper filter Chip conveyor

Condition: excellent (used), Year of construction: 2005, functionality: fully functional, travel distance X-axis: 635 mm, travel distance Y-axis: 510 mm, travel distance Z-axis: 460 mm, rapid traverse X-axis: 30 m/min, rapid traverse Y-axis: 30 m/min, rapid traverse Z-axis: 30 m/min, feed rate X-axis: 30 m/min, feed rate Y-axis: 30 m/min, feed rate Z-axis: 30 m/min, controller manufacturer: Heidenhain, controller model: ITNC 530, table width: 560 mm, table length: 760 mm, table load: 600 kg, rotational speed (min.): 20 rpm, rotational speed (max.): 8,000 rpm, overall weight: 3,600 kg, spindle speed (min.): 8,000 rpm, spindle speed (max.): 8,000 rpm, number of slots in tool magazine: 20, Equipment: documentation/manual, rotational speed infinitely variable, Deckel Maho DMC 635 Nkodpfx Aex Hfngsh Hot - Control: Heidenhain ITNC 530 - Travel range X-, Y-, Z-axis: 635 / 510 / 460 mm - Feed rate: 0.01–10,000 mm/min - Rapid traverse: 30 m/min - Spindle speed: 20–8,000 rpm - Table clamping area: 790 x 560 mm - Tool holder: SK40 DIN 69871 - Tool magazine with 20 stations - Machine weight: approx. 3,600 kg - Rinsing gun - Coolant/air blast selection (M25) - Handheld control unit The machine is in very good condition, with only a few spindle operating hours. Inspection and testing under power at our premises is of course possible. We are pleased to offer you transport, installation, and commissioning at your site as well. Everything from one source: We, Baumgärtner CNC GmbH & Co. KG, are a company specializing in: - Service - Maintenance - Overhauls - Automation of DMG machines and other well-known manufacturers. We support you! From machine purchase, through transport and installation, to commissioning and subsequent maintenance or repairs, you can rely on us.

Condition: ready for operation (used), Year of construction: 2003, functionality: fully functional, machine/vehicle number: 1120 000155 3, travel distance X-axis: 800 mm, travel distance Y-axis: 700 mm, travel distance Z-axis: 600 mm, controller model: Heidenhain 530, spindle speed (max.): 12,000 rpm, Submitting a bid obligates you to collect the item by 16.01.2026! For loading, a complete semi-trailer with a height of 3 m is required. The consignment comprises 8 packages. Nodpfxjxywlzo Ah Hekt

Condition: excellent (used), Year of construction: 2020, operating hours: 4,950 h, functionality: fully functional, machine/vehicle number: CMX 800 V, travel distance X-axis: 800 mm, travel distance Y-axis: 560 mm, travel distance Z-axis: 510 mm, workpiece weight (max.): 800 kg, table width: 560 mm, table length: 1,100 mm, table load: 800 kg, rotational speed (max.): 15,000 rpm, overall weight: 5,400 kg, operating hours of spindle: 4,950 h, type of input current: three-phase, Equipment: chip conveyor, documentation/manual, rotational speed infinitely variable, DMG CMX 800 V Like new – very well maintained and rarely used Machine depth: 2,426 mm Machine weight: 5,400 kg Table length: 1,100 mm Table load capacity: 800 kg Table width: 560 mm Nsdoxwu U Iopfx Ah Hekt Distance from table surface to spindle nose: 11.98 cm – 62.99 cm

Condition: used, Year of construction: 2017, Operating hours: 51,800 h Program run hours: 15,100 h Technical Data: Travel paths/axes X = 800 mm Y = 850 mm Z = 1,050 mm Njdpfx Ahsxqp Ive Hskt B = 360°, 0.001° Max. spindle speed: 12,000 rpm Total connected load: 77 kVA Required space, LxWxH: 9,000 x 5,500 x 4,000 mm Weight: 18,100 kg Equipment: - Siemens 840D - Electronic handwheel - Heavy-duty machining package - Tool changer, rotary magazine with 180 places - Tool holder HSK 100 - Operator control panel - Internal coolant supply - Measurement and monitoring: Renishaw, infrared TDS, MPC

Condition: ready for operation (used), Year of construction: 2009, functionality: fully functional, machine/vehicle number: 1153 000006 3, travel distance X-axis: 1,250 mm, travel distance Y-axis: 1,000 mm, travel distance Z-axis: 1,000 mm, controller model: Siemens 840 D Solutionline (PCU 50), spindle speed (max.): 8,000 rpm, TECHNICAL DETAILS Travel X-axis: 1,250 mm Travel Y-axis: 1,000 mm Travel Z-axis: 1,000 mm Feed rate X, Y, Z-axis: 20 - 60,000 mm/min Nksdpfoxvz Edex Ah Hjt Rapid traverse X, Y, Z-axis: 60 m/min B-axis travel: 360 x 0.001° B-axis feed rate: 10,800 /min Max. table rotation: 30 rpm Max. workpiece diameter: 1,250 mm Max. workpiece height: 1,580 mm Max. workpiece weight: 1,500 kg Clamping area: 800 x 800 mm Pallet weight: 570 kg Spindle speed: 20 - 8,000 rpm Max. permissible weight difference for pallet loading: 1,000 kg Tool holder: SK 50 according to DIN 69871 Maximum tool length: 650 mm Tool magazine: 120 positions MACHINE DETAILS Control: Siemens 840 D Solutionline (PCU 50) Dimensions & Weight Transport dimensions: 6,500 x 3,000 x 3,200 mm Transport weight of the machine (without magazine or other accessories): approx. 20,000 kg Required space: approx. 7,000 x 6,000 mm Total machine weight: 24,000 kg Operating hours "Counter external 2 (read off)": 60,197 h EQUIPMENT Chip conveyor with coolant tank Coolant/lubrication system 4x machine pallets Tool magazine Oil mist extraction unit Length measuring system Y-axis (new spare part) Lubrication unit 230V 0.12 30bar (new spare part) Gear unit ZAHNRADP-AGG*MKF1-KW2-20036 (new spare part) Cyclo gearbox*F1C-A25 (new spare part) Retrofit kit for power module (new spare part) Lifting devices for the machine

Condition: ready for operation (used), Year of construction: 2018, - USED - 3-AXIS VERTICAL MACHINING CENTRE   X-AXIS TRAVEL: 1100 mm Y-AXIS TRAVEL: 560 mm Z-AXIS TRAVEL: 510 mm DISTANCE SPINDLE NOSE-TABLE: 120-630 mm RAPID FEEDS X-Y-Z: 30 m/min SPINDLE: 20 - 12000 rpm; 9 - 13 kW; ISO 40 - DIN Nkedjwh Dg Ropfx Ah Hst TABLE SIZE: 1400 x 560 mm MAX ADMITTED LOAD: 1000 Kg HIGH PRESSURE COOLANT: 12 Bar TOOL MAGAZINE: CHAIN-TYPE ; 30 POS CONTROL UNIT: HEIDENHAIN TNC 620 WEIGHT: 5830 Kg OVERALL DIMENSIONS: 4028 x 2750 x 2950 mm ACCESSORIES: SWARF CONVEYOR ; PORTABLE HANDWHEEL NOTE: WITH No 30 TOOLS-HOLDERS ISO 40

Condition: excellent (used), Working travels 600 x 560 x 510 mm Table size 900 x 560 mm Spindle taper SK40 Spindle speeds 20 -12'000 rpm Tool changer 30 Pos. Control SIEMENS 840D Coolant through spindle Misc. accessories Nkedpfovhahrjx Ah Hot MARCELS MASCHINEN CH

Condition: like new (used), Year of construction: 2020, Machine type Machining center - Vertical Manufacturer DMG MORI Type CMX 600 V Year of construction 2020 Control 840D SL Slimline Multi Touch Operate 4.7 Country of origin DE- Delivery time by arrangement Freight basis ex location Technical details x-path 600 mm y-path 560 mm z-path 510 mm Control unit 840D SL Slimline Multi Touch Operate 4.7 Main spindle: Max. Max. speed 12,000 min/-1 Drive power - main spindle 13 / 9 kW Max. Torque 82 / 54 Nm Tool holder SK 40 Distance between spindle nose and table 120 - 630 mm Work table: Table clamping surface 900 x 560 mm Max. table load 600 kg T-slots 5 Working height 850 mm Tool magazine: Number of tool positions 30 pos. SK 40 tool holder max. tool diameter 80 mm max. tool diameter with free neighboring box 130 mm Max. tool length 300 mm Max. tool weight 8.0 kg Tool - tool change time 2.4 sec Changing time chip - chip 6.7 sec Feed rates: Rapid traverse 30 m/min Feed force 5 kN Feed speed max. 30,000 mm/min Total power requirement 32 kVA Machine weight approx. 5.0 t Space requirement approx. 4.0 x 5.0 x 3.0 m Accessories documentation Chip conveyor Coolant unit High-pressure cooling 12 bar Internal coolant supply electric handwheel Signal lamp - 4 colors Measuring probe PP40 Nkjdpferwi Swsx Ah Hot Tool measurement

Condition: good (used), Year of construction: 2009, Ref. -No.: 10556 Manufacturer: DMG MORI Type: DMC 60 FD Year of construction: 2009 Type of control: CNC Control: Siemens 840DSL-721 Storage location: Halberstadt Country of origin: Germany X-Travel: 630 mm Y-Travel: 800 mm Z-Travel: 850 mm Max. Workpiece diameter: 600 mm Max. Workpiece Weight: 400 kg Nksdpfx Ahexc Tt Tj Hst Turning Speeds: 12000 RPM Tool changer: 60 Max. Workpiece height: 500 mm Weight Of The Machine Ca.: 10 t Numbers Of Pallets: 2 Motor spindle: 24000 RPM Further information: - Internal cooling - Swivel range of the B-axis -5/ +110° - Cooled table console, table bearings and motors - Cooled bearing blocks and spindle nuts of the ball screw drives - Cooled guides in the linear axes X/Y/Z - Drive power: 100%ED/40%ED 24 KW/35 KW - Chip conveyor - Internal coolant supply - Electric handwheel - Rotary function Rotary table - Operating mode 4 - 2 pallets ø 630 mm - Rotary pallet changer - IKZ 40bar , 980 liters, paper belt filter - Dsc Htetzywvjlwwxokp - Measuring probe Heidenhain - 3D Quickset Machine can be inspected under power by arrangement.

Condition: used, Year of construction: 2016, Milling machines Nodpfx Ahsvtfp Es Hjkt Travel distance X: 600 mm Travel distance Y :560 mm Travel distance Z: 210 mm HSC-machines Number of axis: 3 milling machine / machining center Control: Siemens 840D_sl spindle chuck: SK 40 spindle revolutions: 12000 rpm table size X: 900 mm table size Y: 560 mm max. workpiece weight: 400 kg tool changer: 30 - time feed rate: 30000 mm/min

Condition: excellent (used), Year of construction: 2002, operating hours: 69,000 h, functionality: fully functional, travel distance X-axis: 800 mm, travel distance Y-axis: 700 mm, travel distance Z-axis: 600 mm, rapid traverse X-axis: 50 m/min, rapid traverse Y-axis: 50 m/min, rapid traverse Z-axis: 50 m/min, nominal power (apparent): 69 kVA, controller manufacturer: Siemens, controller model: Sinumerik 840D powerline, total height: 2,800 mm, total length: 7,000 mm, total width: 4,000 mm, table width: 630 mm, table length: 800 mm, table load: 800 kg, overall weight: 10,000 kg, spindle speed (min.): 20 rpm, spindle speed (max.): 12,000 rpm, operating hours of spindle: 27,000 h, coolant supply: 40 bar, spindle nose: HSK63, number of slots in tool magazine: 40, Equipment: chip conveyor, documentation/manual, rotational speed infinitely variable, DMG MORI DMC 80U Year of manufacture: 2002 Operating hours: 69,000h Spindle hours: 27,000h Equipment: 5-axis Swivel head Direct path measurement in X/Y/Z (glass scales) Chip conveyor Extraction NC rotary table as an add-on table Pallet changer Tool magazine 60 places Nedev Eurmspfx Ah Hskt Heidenhain measuring probe Handwheel Rotating viewing window IKZ 40 bar Chip flushing Operating mode 4 + Machine technically serviced and in very good condition + Geometrically within new machine tolerance + Transport and commissioning can be offered separately

Condition: ready for operation (used), Year of construction: 2011, Make: DMG Type of machine: DMC 60 T Year of manufacture: 2011 Control system: Heidenhain iTNC 530 Machine's weight: ca. 9 t Nedpfx Aexg Tdyjh Hskt Tool holder: SK 40 x-travel: 780 mm y-travel: 560 mm z-travel: 560 mm Speed range: 12.000 1/min Number of tools in the magazine: 120 Pl. Internal coolant supply: 40 bar. 3D Measuring probe: Heidenhain TS641 : 360 ° : x

Condition: excellent (used), Year of construction: 2000, TECHNICAL DETAILS Travel X / Y / Z: 1,250 / 880 / 800 mm Control: Heidenhain Spindle speed: 10,000 rpm B-axis: automatic Nsdpjxdncljfx Ah Hekt Number of tool changer stations: 60 Tool holder: SK-50 Number of pallets: 2 pcs Pallet dimensions: 1,000 x 800 mm MACHINE DETAILS Operating time: 59,112 h Spindle hours: 21,619 h Machine transport dimensions: 5.5 x 3.0 x 3.1 m; 14.3 t EQUIPMENT - electronic handwheel - MillPlus 3D contouring control - Central spindle air blast - Measuring probe - Rinse gun - Documentation - Chip conveyor (hinged belt) - Coolant system - Oil mist extraction

Year of construction: 2007, condition: ready for operation (used), A DMG Mori CNC 5-axis milling machine is available. Travel X/Y/Z: 780mm/560mm/560mm, spindle speed: 18000rpm, tool holder: SK40, torque: 125Nm, tool positions: 60. Machine dimensions X/Y/Z: approx. 3500mm/2700mm/2200mm, weight: approx. 10000kg, control: Heidenhain iTNC 530, operating hours: 59901h, spindle hours: 44715h. Documentation available. An on-site inspection is possible. Nksdpfx Ahoxddbdj Hot

Condition: ready for operation (used), Year of construction: 2022, operating hours: 6,490 h, functionality: fully functional, travel distance X-axis: 650 mm, travel distance Y-axis: 950 mm, travel distance Z-axis: 700 mm, rotational speed (max.): 15,000 rpm, number of slots in tool magazine: 123, TECHNICAL DETAILS Control: CELOS control with Siemens 840D sl Operate X travel: 650 mm Y travel: 950 mm Z travel: 700 mm Spindle Speed: up to 15,000 rpm Interface: HSK-A63 Power: 21 kW (40% duty cycle), 16 kW (100% duty cycle) Torque: 111 Nm (40% duty cycle), 85 Nm (100% duty cycle) Tool clamping force: 25 kN Worktable NC swivel table, max. permissible load: 600 kg Workpiece dimensions Max. interfering contour diameter: 630 mm Height: 700 mm Tool magazine Type: Wheel magazine Capacity: 123 spaces Permissible tool weight: 15 kg Permissible total weight per wheel: 300 kg Cooling system Coolant tank: 1,300 L Drive motor A-axis and B/C-axis liquid-cooled B/C-axis gearbox liquid-cooled Measuring systems Renishaw infrared probe, tool breakage monitoring Tool measurement in working area Blum laser, tool length and diameter measurement Linear axis measuring systems direct, absolute, resolution 0.00001 mm (10 nm) Feed rates Max. feed rate X-Y-Z: 60,000 mm/min Rapid traverse X-Y-Z: 60 m/min Nkodpfjxamm Iex Ah Hst Accuracy Machine accuracy X-Y-Z: A

Condition: used, Year of construction: 2007, number of spindle speeds 18.000 U/min Nkedpfx Ahjvxlq To Hjt numbers of positions in the tool changer 60 tool taper HSK63 Control SIEMENS - 840 D Milling machining centers - horizontal | DMG - DMC 60H linear equipped with ITC (40 bar), 60-way chain magazine tool changer, NC swivel rotary table (Direct Drive) and chip conveyor. Additional equipment: - laser tool breakage monitoring - flush gun - lubrication system rotary unions The machine is in a well-maintained condition. The machine videos from the production plant will be shared on request. Please refer to further technical details in the attachement of the offer. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #Tags: DMC60Hlinear | DMC 60-H | DMG - DMC 60 H

Condition: excellent (used), Year of construction: 2012, functionality: fully functional, machine/vehicle number: 11920000463, travel distance X-axis: 1,000 mm, travel distance Y-axis: 1,000 mm, travel distance Z-axis: 1,000 mm, rapid traverse X-axis: 60 m/min, rapid traverse Y-axis: 60 m/min, rapid traverse Z-axis: 60 m/min, table width: 1,000 mm, table length: 8,000 mm, spindle motor power: 35,000 W, spindle nose: HSK-63, number of slots in tool magazine: 60, Equipment: chip conveyor, documentation/manual, rotational speed infinitely variable, ACCESSORIES Chip conveyor Oil mist collector 60 positions in tool changer 980 liter high pressure coolant through the spindle system with paper band filter Infrared measuring sensor Tool measurement with BLUM Laser 3D Quick Set preparation Nksdpfor Npvlox Ah Hst Cooling unit Air blast through the spindle

Condition: good (used), Year of construction: 2000, Hello I have for sale a 5 axis CNC milling center DECKEL MAHO DMU 50 V evolution. The machine is connected and working. _ Type: 5 axis milling center Manufacturer: DMG DECKEL MAHO Model: DMU 50 V evolution Control: HEIDENHAIN TNC430 Country of manufacture: Germany Year of manufacture: 2000 _ Machine parameters: Nksdpfx Ahott Ntfo Hjt - number of axes: 5 - working table dimensions (length x width): 500 x 380 mm - maximum spindle speed: 18,000 rpm - spindle power: 15 kW - X/Y/Z axis travel: 500/420/380 mm - C/B axis travel: 180/360 degrees - maximum feed rate: 20 m/min - total power: 40 kVa - machine dimensions (L x W x H): 2800 x 2300 x 2600 mm - total weight: 6000 kg