WIMAG-Schweisstechnik GmbH

Condition: used, Year of construction: 2012, workpiece . workpiece diameter 15 -70 mm swing diameter max. 150 mm clamping length max. 500 mm Swing over bezel area 70 mm dimension 150 x 300 mm max. turning speeds 250 min/-1 longitudinal adjustment manuell über Kettenrad Fixed tip MK 4 (Junker D75 mm) clamping capacity ü. Hydraulik einstellbar travel -z axis max. 1000 mm feed z - Achse (CNC gesteuert) dimension D 205 x 450 mm flange diameter D 190 mm Gsdpfx Aaex H Ando Ijbg standards association D 127 mm drive 30 kW speed control mit Frequenz- Umformer max. turning speeds 4400 min/-1 type Borazon (CBN) o. Diamant mm diameter 450 mm bore D 127 mm peripheral speed max. 90 m/sec type GR-3520-NR mm diameter range D 20 - D 35 mm dimension D 80 x 250 mm flange D 100 standards association D 75 drive 1,8 kW max. turning speeds 24000 min/-1 weight of the machine ca. 7,0 t In our opinion, the machine is in good condition and can be inspected under power by appointment. There are 2 identical machines available. Accessories, tools and clamping devices shown are only part of the scope of delivery if this is noted in the additional information. Changes and errors in the technical data and information as well as Subject to prior sale!

Condition: excellent (used), Year of construction: 1973, functionality: fully functional, input voltage: 380 V, Possible accessories can be negotiated on site. Gjdpfoxyqalox Aa Iobg

Condition: as good as new (ex-display), Year of construction: 2025, GT 40 - The OPTIMUM premium NC sanding machine with Siemens touch screen. - Electromagnetic clamping plate for fixing the workpiece with automatic demagnetization function - High-quality spindle with precision tapered roller bearings - Hardened and ground table guideways - Turcite-B coated counter guides for high wear resistance and low friction - Grinding spindle with high-quality precision bearings - Grinding wheel can be resharpened directly on the machine using a sharpening device - Digital position indicator - Machine base made of sturdy torsion-resistant cast iron for maximum rigidity and stability - Guideways for longitudinal, transverse and vertical movements are backlash-free and self-centring as V and flat tracks - Precision recirculating ball screws - Guideways and transport spindle with central lubrication - All flat guides are finely scraped and thus guarantee maximum precision of all manual movements B9errbkz8v - Safety electrics with 24 V DC voltage - Large decoupled handwheels in all three axes - Hydraulic lines according to DIN EN 853 - Grinding accuracy: 0.005 mm - Grain 46 corundum grinding wheel for all common steels - Swivel-mounted control panel makes work considerably easier - Separate hydraulic unit with heat exchanger, avoids vibrations and thermal stress - Two-channel safety electronics - Grinding table splash guard - EMC filter class - With IE3 motor - consumes considerably less energy, resulting in significant cost savings Dimensions and weights Length approx. 3600 mm Width/depth approx. 2400 mm Height approx. 1900 mm Weight approx. 3600 kg Electrical data Total connected load 7.5 kW Supply voltage 400 V Mains frequency 50 Hz Surface grinding table Clamping surface length 400 mm Clamping surface width 800 mm Grinding wheel(s) Outer diameter 350 mm Width 40 mm Bore 127 mm Peripheral speed 27 m/s Spindle Speed 1450 min¯¹ Concentricity 0.005 mm X-axis Feed speed 5 - 25 m/min Digital position indicator Coolant device Balancing mandrel Gsdpfexyhvkex Aa Isbg Grinding wheel grit 46 Diamond pin Operating tool Manual oil pump LED lamp Electromagnetic clamping plate Demagnetizing function Equipment Electromagnet clamping plate Splash guard table enclosure Demagnetizing device Parallel dressing device ✔ Coolant device 125 W Work light LED lamp Alignment feet ✔

Condition: used, Year of construction: 2004, grinding length: 300 mm, grinding width: 150 mm, total height: 1,700 mm, total length: 1,400 mm, total width: 1,000 mm, grinding wheel diameter: 200 mm, table length: 400 mm, table width: 150 mm, spindle speed (min.): 2,800 rpm, grinding spindle speed: 2,800 rpm, power: 1.5 kW (2.04 HP), disc diameter: 200 mm, Surface grinding machine, SIEMENS Simatic OP17 control, magnetic chuck 300x125 mm, grinding wheel dresser, coolant system, various grinding wheels Gsdpfx Ajxx Th Aoa Iebg

Condition: good (used), Year of construction: 1984, Machine is in good working codition. Gedpfx Ajxvikusa Iobg

Condition: used, Year of construction: 1976, grinding length: 350 mm, grinding width: 150 mm, total height: 2,150 mm, total length: 1,200 mm, total width: 1,100 mm, grinding wheel diameter: 175 mm, table length: 400 mm, table width: 150 mm, spindle speed (min.): 2,800 rpm, grinding spindle motor power: 750 W, power: 0.75 kW (1.02 HP), Surface grinding machine, SONY digital readout, manual and automatic feed, manual magnetic chuck 350x150 mm, grinding wheel dresser, coolant system Gbodpfx Aoxq Abisa Ijg

Condition: used, Year of construction: 1992, Used ELB Flat and External Cylindrical Grinding Center Model: CAM-MASTER I / 1 FR Year of manufacture: 1992 Design: Moving column design (moving column 14 t), extremely rigid, very precise Possible processes: flat and external cylindrical grinding operations Grinding wheel diameter: 400 mm Max. speed: 9,000 rpm Max. torque: 380 Nm Max. cutting speed: 180 m/s Drive power: 40 kW continuous, 60 kW peak Operating voltage: 400 V / 50 Hz Control voltage: 230 V / 50 Hz Controller: Schleicher Promodul Longitudinal feed (X-axis): 2,000 mm / max. 6,000 mm/min Cross-feed (Y-axis): 400 mm / max. 750 mm/min Vertical feed (Z-axis): 350 mm / max. 1,500 mm/min External cylindrical grinding axis (B-axis): positionable, 0.025–25 min-1 Crushing/dressing (V-axis): 180 mm / max. 100 mm/min Max. feed rate: 6 m/min Coolant supply: 25 bar, 400 l/min (variable coolant supply with grinding oil Petrofer Isocut at 25 bar and 400 l/min) Measurement technology: 3-component force measuring platform, built-in vibration sensors Oil capacity: approx. 130 l lubrication, approx. 90 l hydraulics with oil treatment system The machine is equipped with 2 grinding stations. 2 dressing units are available for profile grinding. Various grinding wheels included as accessories. Gbodpfx Aaoxqm D Is Iog Dimensions (L x H x D): 3,200 x 2,200 x 600 mm

Condition: not inspected (used), functionality: unexamined, machine/vehicle number: 6190, grinding wheel diameter: 150 mm, table length: 720 mm, table width: 200 mm, overall weight: 2,000 kg, No reserve price – guaranteed sale to the highest bidder! Godpfx Ajxqg E Sea Ijbg The machine is being auctioned due to business closure. Placing a bid obligates you to collect the machine on schedule between 26.01.2026 and 29.01.2026! TECHNICAL DETAILS Table dimensions: 720 x 200 mm Grinding wheel diameter: 150 mm MACHINE DETAILS Electrical data Operating voltage: 380 V Frequency: 50 Hz Rated current: 15 A Control voltage: 220 V Dimensions & Weight Dimensions (L x W x H): 3,500 x 2,000 x 1,700 mm Weight: 2,000 kg EQUIPMENT Magnetic chuck (450 x 200 mm) RSF three-axis digital readout BRAILLON magnetizing and demagnetizing station JUNG adjustable magnetic chuck (120 x 90 mm)

Condition: not inspected (used), functionality: unexamined, machine/vehicle number: 384, grinding wheel diameter: 250 mm, table length: 1,300 mm, table width: 500 mm, overall weight: 1,500 kg, jaw width: 160 mm, No minimum price – guaranteed sale to the highest bidder! The machine is being auctioned as part of a business closure. Placing a bid obligates you to collect the machine on time between 26.01.2026 and 29.01.2026! TECHNICAL DETAILS Table dimensions: 1,300 x 500 mm Magnet dimensions: 1,020 x 450 mm Grinding wheel diameter: 250 mm Jaw width: 160 mm MACHINE DETAILS Electrical Data Operating voltage: 380 V Control voltage: 220 V Rated current: 25 A Dimensions & Weight Gbjdpfx Aasxqf Uxj Iog Dimensions (L x W x H): 2,500 x 2,400 x 1,900 mm Weight: 1,500 kg EQUIPMENT 3 T-slots Magnetic chuck Various grinding wheels Vice Belt filter system

Condition: not inspected (used), functionality: unexamined, machine/vehicle number: 6471, grinding wheel diameter: 200 mm, overall weight: 1,000 kg, No reserve price – guaranteed sale to the highest bidder! The machine is being auctioned due to business closure. Placing a bid obligates timely collection between 26/01/2026 and 29/01/2026! TECHNICAL DETAILS Magnet dimensions: 450 x 220 mm Grinding wheel diameter: 200 mm MACHINE DETAILS Electrical data Operating voltage: 380 V Gbedpfx Aaoxqf E Rs Ijg Frequency: 50 Hz Rated current: 15 A Dimensions & weight Dimensions (L x W x H): 3,000 x 1,500 x 1,700 mm Weight: 1,000 kg EQUIPMENT DIAFORM dressing device

Condition: not inspected (used), functionality: unexamined, overall weight: 700 kg, grinding wheel diameter: 150 mm, jaw width: 70 mm, No minimum price – guaranteed sale to the highest bidder! Gedpexqb D Aofx Aa Iebg The machine is being auctioned due to company closure. Submitting a bid commits you to timely collection between 26.01.2026 and 29.01.2026! TECHNICAL DETAILS Magnet dimensions: 500 x 200 mm Grinding wheel diameter: 150 mm Jaw width: 70 mm MACHINE DETAILS Dimensions & Weight Dimensions (L x W x H): 3,000 x 1,500 x 1,600 mm Weight: 700 kg EQUIPMENT Matching workbench with sine magnetic chuck Various grinding wheels Precision vise

Condition: ready for operation (used), Year of construction: 1990, functionality: fully functional, machine/vehicle number: 693 / 90, TECHNICAL DETAILS Clamping surface: 600 x 250 mm EQUIPMENT Godpfxoxl S H Re Aa Ijbg YZ positioner Paper band filter system

Condition: ready for operation (used), Year of construction: 2005, grinding length: 400 mm, grinding width: 200 mm, capacity 400x200MM, manual table, magnetic chuck, external electrical cabinet Gsdpfxjxc Ivcj Aa Iebg

Condition: new, Year of construction: 2025, functionality: fully functional, grinding length: 340 mm, grinding width: 170 mm, total height: 730 mm, total length: 930 mm, total width: 780 mm, The G115 flat grinder is a compact grinding machine designed for processing the circumference or end face of the grinding wheel on horizontal or vertical surfaces of a workpiece. Using fixtures or shaped grinding wheels, it is also possible to machine inclined or contoured surfaces. The machine is ideally suited for small businesses, maintenance operations, home workshops, laboratories, instructional demonstrations, and more. TECHNICAL DATA Maximum removal rate: not greater than 0.03 mm Maximum linear speed of the grinding wheel: 35 m/s Table size: 152×304 mm Maximum grinding height: 210 mm Longitudinal travel of worktable: 340 mm Cross travel of worktable: 170 mm T-slot of worktable: 1–12 mm Grinding wheel outer diameter × bore × width: 180×32×13 mm Grinding head motor: 550 W / 220 V Vertical feed handwheel increment: 0.025 mm Lateral feed handwheel increment: 0.02 mm Net weight / gross weight: 210 / 260 kg Machine dimensions: 930×780×730 mm Packing dimensions: 1100×760×860 mm The worktable can be moved forwards and backwards as well as left and right. The grinding head can be raised and lowered vertically. High rigidity throughout the entire machine structure. The grinding head operates smoothly. Compact design and low noise emissions. A working enclosure is available separately. Gedpfx Ajxb Uq Dja Isbg The machine is lubricated via a manual oil pump. To lubricate, simply pull out the handle. If you require special accessories to increase work efficiency, please contact customer service. Special accessories must be purchased separately. PRODUCT INFORMATION: From the proximal end of the main spindle, the radial run-out of the tapered bore axis is 0.01–0.02 mm at a distance of 100 mm.

Condition: refurbished (used), Year of construction: 2025, functionality: fully functional, machine/vehicle number: 6360.16.65, Country of manufacture: Switzerland Voltage: 380/400/50/3 Net weight: 1350 kg Customs tariff number: 8460.1920 Dimensions: 200/120/160 cm TECHNICAL SPECIFICATIONS Maximum saddle travel: 530 x 220 mm Maximum grinding surface: 520 x 230 mm Table clamping surface: 600 x 200 mm Table speeds Longitudinal, standard operation: 0-25 m/min With slow feed: 5/10 mm - 8 m/min Cross feed: 0-6 m/min Vertical travel by hand: 330 mm Rapid travel by motor: 290 mm Rapid feed rate: 460 mm/min Gsdsw Ucxqopfx Aa Iebg Max. distance between table and spindle axis: 412 mm Vertical feed movement Handwheel, 1 division: 0.01 mm Micrometric device, 1 division: 0.001 mm Automatic: 0.001-0.099 mm With pulse button: 0.001 mm Cross feed movement Handwheel, 1 division: 0.01 mm Micrometric device: 0.001 mm Grinding wheel Diameter x width x bore: 225x25x50/51 mm Standard RPM: 2700 rpm With variable speed drive: 3700-1300 rpm All technical data are provided without guarantee and are subject to possible errors or omissions.

Condition: good (used), Year of construction: 1994, completely overhauled in 1994 Table length: 450 mm Table width: 180 mm Execution: Hydraulic Maximum distance between table and spindle center: 400 mm Longitudinal travel (X-axis): 550 mm Cross travel (Y-axis): 200 mm Automatic vertical feed Grinding wheel diameter: 200 mm Grinding wheel width: 25 mm Grinding wheel speeds: from 2800 rpm Digital display Weight: 1,000 kg Gbedpfxew R Tl Hs Aa Isg

Condition: as good as new (ex-display), Year of construction: 2025, GT 30 - The OPTIMUM premium NC sanding machine with Siemens touch screen. - Electromagnetic clamping plate for fixing the workpiece with automatic demagnetization function - High-quality spindle with precision tapered roller bearings - Hardened and ground table guideways - Turcite-B coated counter guides for high wear resistance and low friction - Grinding spindle with high-quality precision bearings - Grinding wheel can be resharpened directly on the machine using a sharpening device - Digital position indicator - Machine base made of sturdy torsion-resistant cast iron for maximum rigidity and stability - Guideways for longitudinal, transverse and vertical movements are backlash-free and self-centring as V and flat tracks - Precision recirculating ball screws - Guideways and transport spindle with central lubrication - All flat guides are finely scraped and thus guarantee maximum precision of all manual movements - Safety electrics with 24 V DC voltage - Large decoupled handwheels in all three axes - Hydraulic lines according to DIN EN 853 - Sanding accuracy: 0.005 mm - Grain 46 corundum grinding wheel for all common steels - Swivel-mounted control panel makes work considerably easier - Separate hydraulic unit with heat exchanger, avoids vibrations and thermal stress - Two-channel safety electronics - Grinding table splash guard - EMC filter class - With IE3 motor - consumes considerably less energy, resulting in significant cost savings Dimensions and weights Length approx. 3200 mm Width/depth approx. 2200 mm Height approx. 2100 mm Weight approx. 3000 kg Electrical data Total connected load 6.5 kW Supply voltage 400 V Mains frequency 50 Hz Surface grinding table Clamping surface length 300 mm Clamping surface width 600 mm Grinding wheel(s) Outer diameter 350 mm Width 40 mm Bore 127 mm Peripheral speed 27 m/s Spindle Speed 1450 min¯¹ Concentricity 0.005 mm X-axis Feed speed 5 - 25 m/min Scope of delivery Unit of measure: piece Packaging unit: 1 Digital position indicator Coolant device Balancing mandrel Grinding wheel grit 46 Diamond pin Operating tool Manual oil pump LED lamp Electromagnetic clamping plate Demagnetizing function Equipment Electromagnet clamping plate Splash guard table enclosure Automatic demagnetizing device Parallel dressing device ✔ Coolant device 125 W Work light LED lamp Gbedow Eazfepfx Aa Ieg Alignment feet ✔

Condition: as good as new (ex-display), Year of construction: 2024, High-quality spindle with precision tapered roller bearings Gbedpfxow Eay Io Aa Ijg Hardened and ground table guideways Turcite-B coated counter guides for high wear resistance and low friction Integrated grinding wheel removal device Machine base made of sturdy, torsion-resistant cast iron for maximum rigidity and stability Backlash-free V-flat guide in the Z-axis and flat guides in the X- and Y-axis Trapezoidal threaded spindle in the Y-axis Manual central lubrication All flat guides are finely scraped, guaranteeing high precision of all manual movements LED lamp Safety electrics with 24 V DC voltage Sanding accuracy: 0.005 mm Grit 46 corundum grinding wheel for all common steels included as standard Two-channel safety electrics EMC filter class Significant energy savings thanks to IE3 motor Coolant system with external coolant tank Dimensions and weights Length approx. 1970 mm Width/depth approx. 1300 mm Height approx. 1700 mm Weight approx. 850 kg Electrical data Power drive motor 1.5 kW Supply voltage 400 V Mains frequency 50 Hz Surface grinding table Clamping surface length 200 mm Clamping surface width 500 mm Grinding wheel(s) Outer diameter 200 mm Width 20 mm Bore 31.75 mm Peripheral speed 33 m/s Spindle Speed 2850 min¯¹ Concentricity 0.005 mm X-axis Feed speed Manual

Condition: as good as new (ex-display), Year of construction: 2025, GT25 - The OPTIMUM premium NC sanding machine with Siemens touch screen. - Electromagnetic clamping plate for fixing the workpiece with automatic demagnetization function - High-quality spindle with precision tapered roller bearings - Hardened and ground table guideways - Turcite-B coated counter guides for high wear resistance and low friction - Grinding spindle with high-quality precision bearings - Grinding wheel can be resharpened directly on the machine using a sharpening device - Digital position indicator - Machine base made of sturdy torsion-resistant cast iron for maximum rigidity and stability - Guideways for longitudinal, transverse and vertical movements are backlash-free and self-centring as V and flat tracks - Precision recirculating ball screws - Guideways and transport spindle with central lubrication - All flat guides are finely scraped and thus guarantee maximum precision of all manual movements - Safety electrics with 24 V DC voltage - Large decoupled handwheels in all three axes - Hydraulic lines according to DIN EN 853 - Sanding accuracy: 0.005 mm - Grain 46 corundum grinding wheel for all common steels - Swivel-mounted control panel makes work considerably easier - Separate hydraulic unit with heat exchanger, avoids vibrations and thermal stress - Two-channel safety electronics - Grinding table splash guard - EMC filter class - With IE3 motor - consumes considerably less energy, resulting in significant cost savings Technical data: Dimensions and weights Length approx. 2300 mm Width/depth approx. 1600 mm Height approx. 1675 mm Weight approx. 1700 kg Electrical data Total connected load 3 kW Supply voltage 400 V Phase(s) 3 Ph Oc8fv Current type AC Mains frequency 50 Hz Surface grinding table Length 254 mm width 508 mm Grinding wheel(s) Outer diameter 200 mm width 20 mm Bore 31.75 mm Peripheral speed 33 m/s Spindle Speed 2850 min¯¹ Concentricity 0.005 mm X-axis Feed speed 5 - 25 m/min Gbsdjw Eayhepfx Aa Iog PU 1 Scope of delivery Unit of measure: piece Packaging unit: 1 Digital position indicator Coolant device Balancing mandrel Grinding wheel grit 46 Diamond pin Operating tool Manual oil pump LED lamp Electromagnetic clamping plate Demagnetizing function Equipment Electromagnet clamping plate Splash guard table enclosure Automatic demagnetizing device Parallel dressing device Coolant device 40 W Work light LED lamp Alignment feet

Condition: excellent (used), Year of construction: 1981, grinding length: 450 mm, grinding width: 200 mm, power: 1.5 kW (2.04 HP), input voltage: 200 V, Manufacturer Mitsui MGG CO.LTD Type: MSG-250M Year of manufacture:1981-10 Maximum grinding width: 200 mm Maximum grinding length: 450 mm Maximum table length movement: 500 mm Maximum table length movement: 250 mm Table movement per handwheel revolution: 6 mm /revolution Grinding spindle speed: spindle: 2900 rpm 50 Hz Standard grinding wheel diameter: 200 mm Grinding wheel width: 25 mm Grinding wheel speed: 2900 rpm 50 Hz Grinding wheel bore diameter: 31.75 mm Gbsdewvga Nopfx Aa Ieg Electric power: 2 HP 1.5 kW 4P 200V 3 phase Weight, approx. 1050 kg

Condition: excellent (used), Year of construction: 1991, functionality: fully functional, grinding length: 350 mm, grinding width: 160 mm, type of input current: three-phase, overall weight: 740 kg, rotational speed (max.): 2,900 rpm, power: 1 kW (1.36 HP), input voltage: 200 V, disc diameter: 250 mm, Equipment: documentation/manual, Manufacturer Mitsui MGG CO.LTD Type: MSG-200M Year of manufacture:1991-4 Maximum grinding width: 160 mm Maximum grinding length: 350 mm Maximum table length movement: 360 mm Maximum table length movement: 200 mm Table movement per handwheel revolution: 3 mm /revolution Godpfx Aaswvf Hbe Ijbg Grinding spindle speed: spindle: 2900 rpm 50 Hz Standard grinding wheel diameter: 200 mm Grinding wheel width: 25 mm Grinding wheel speed: 2900 rpm 50 Hz Grinding wheel bore diameter: 31.75 mm Electrical power: 2 HP 1 kW 4P 200V 3 phase Weight, approx. 740 kg

Condition: excellent (used), Year of construction: 1969, functionality: fully functional, For sale: excellent UMC tool grinder Gbodpfx Aaswum Sis Iog The machine is fully operational and in very good condition.

Condition: new, The HFS 3063 F Advance is a remarkable addition to the Conventional Surface Grinders category, designed for optimal performance within the Grinding Machines product group. This KNUTH machine exemplifies robust engineering with a cast-iron frame that offers superior rigidity and exceptional machining quality. It features precision guideways lubricated via a central system, ensuring reliability during operation. With an extensive standard equipment package, including a magnetic clamping plate with a built-in demagnetizing function and a Siemens PLC control system with a user-friendly touchscreen, the HFS 3063 F Advance enhances operational efficiency. Moreover, its electronically controlled hand-wheel allows for accurate spindle movement. Customers seeking a solution that bridges conventional grinding and CNC automation will find that this machine meets their needs seamlessly. Whether you're considering installation or the right accessories, speaking with our team can provide clarity on how this model can elevate your operations. Request a quote for the HFS 3063 F Advance today to benefit from advanced surface grinding technology. Gbjdpfxewub Tuo Aa Isg

Condition: excellent (used), Year of construction: 2018, functionality: fully functional, grinding length: 500 mm, grinding width: 250 mm, total height: 1,800 mm, total length: 2,250 mm, total width: 1,400 mm, feed rate X-axis: 25 m/min, grinding wheel diameter: 205 mm, table length: 500 mm, type of input current: three-phase, table width: 250 mm, grinding wheel width: 19 mm, spindle speed (max.): 2,900 rpm, overall weight: 1,350 kg, grinding spindle motor power: 1,500 W, rotational speed (max.): 2,900 rpm, grinding spindle speed: 2,900 rpm, power: 1.5 kW (2.04 HP), grinding wheel speed: 2,900 rpm, input voltage: 400 V, disc diameter: 205 mm, Metallkraft FSM 2550 Surface Grinder Machine Type: Surface Grinder with NC Controlled Vertical Feed Year: 2018 Control: NC Control Condition: Very Good Includes NC Controlled Vertical Feed Table Enclosure Guard Electro-Magnetic Chuck Wheel Dresser Coolant Equipment Halogen Light DRO Auto-Lube Technical Specifications Grinding Wheel Diameter: 180 to 205mm Grinding Wheel Width: 19 to 13mm Grinding Wheel Bore: 31.75mm Spindle Speed: 2900rpm Table Dimensions: 500 x 250mm X Axis Travel Speed: 5-25m/min Drive Motor Power: 1.5kW Electrical Connection: 400V/3Phase/50Hz Machine Dimensions: 2250x1400x1800mm Machine Weight: 1350kg Gbedsv Iq Shjpfx Aa Isg

Condition: excellent (used), Type 1026 Max. longitudinal movement 700 mm Max. transverse movement 310 mm Table size 600 x 250 mm Max. grinding capacity 650 x 300 mm Main motor power 5.5 HP Gsdpfx Ajvzk Hfsa Isbg