Used Protec Positionierer Welding Table for sale (20,320)

Condition: new, table length 1200 mm table width 800 mm table height 840 - 890 mm weight of the machine ca. 0,3 t Welding table / perforated table: Hole diameter: 28mm The table is made of 15mm thick, high-alloy steel S355 JR T = 15 The surface is untreated. Sidewalls 165mm height adjustable from approx. 880 - 980mm Fedpfx Aoih D Apsd Negb Ribbed underside for reinforcement. including floor storage Accessories optional !! Surface flatness 0.2 - 0.4mm on 1000mm. The table can be moved with a pallet truck. Pallet truck is not included in the scope of delivery

Condition: new, table length 2400 mm table width 1200 mm table height 200 mm material thickness 25 mm weight 920 kg Manufacturer: GERD WOLFF Technical Details: • Length 2400 mm • Width 1200 mm • Height 200 mm • Weight 920 kg • Hole diameter 28 mm • Hole spacing 100 mm • Plate thickness: 25mm Advantages and Features: • 3-day gas nitriding process • Increased corrosion resistance • Weld spatter adhesion protection • Maximum load capacity • Enhanced fatigue strength • Improved vibration resistance • Fine scale engraving • Reinforcement with welded seams and ribs on the underside • Optimal working height of 820-865 mm • 6 height-adjustable support legs • Available with a matching accessory set (optional) Our welding tables are manufactured using HT 300 cast iron and are nitrided as Fjdpfx Asynbmmjd Nogb a whole after mechanical processing. Furthermore, they feature precise fine scale engraving using laser technology. To ensure adequate stability, our welding tables are reinforced with welded seams and ribs on the underside (see illustrations). Additionally, they undergo a 3-day gas nitriding process, enhancing their corrosion resistance, fatigue strength, and vibration resistance, among other factors. All our tables come with adjustable legs. The minimum height adjustment range is 620 mm, while the maximum is 665 mm, allowing for a variable working height of 820 to 865 mm. Additional available dimensions: • 1000 x 1000 x 200 • 2000 x 1000 x 200 • 1200 x 1200 x 200 • 1500 x 1000 x 200 • 1500 x 1500 x 200 • 1500 x 2000 x 200 • 2000 x 3000 x 200 • 3000 x 1500 x 200 • 3000 x 2000 x 200 • 4000 x 2000 x 200 Please note that the images are not to scale and are for illustrative purposes only. Our welding tables are produced for our distribution brand "GERD WOLFF Maschinenfabrik" by a reputable manufacturer. 3D Welding Table - 3D Clamping Fixtures - 3D Precision Welding Table

Condition: new, table length 1220 mm table width 760 mm table height 910 mm weight of the machine ca. 226 kg Fedpfoxqrhlsx Ad Njgb

Condition: new, Year of construction: 2025, table length 3000 mm table width 1500 mm table height 200 mm weight 1500 kg Manufacturer: GERD WOLFF Technical Details: • Length 3000 mm • Width 1500 mm • Height 200 mm • Weight 1500 kg • Hole diameter 28 mm Fgsdpfx Adsymf Rtj Nsb • Hole spacing 100 mm • Plate thickness: 25mm Advantages and Features: • 3-day gas nitriding process • Increased corrosion resistance • Weld spatter adhesion protection • Maximum load capacity • Enhanced fatigue strength • Improved vibration resistance • Fine scale engraving • Reinforcement with welded seams and ribs on the underside • Optimal working height of 820-865 mm • 8 height-adjustable support legs • Available with a matching accessory set (optional) Our welding tables are manufactured using HT 300 cast iron and are nitrided as a whole after mechanical processing. Furthermore, they feature precise fine scale engraving using laser technology. To ensure adequate stability, our welding tables are reinforced with welded seams and ribs on the underside (see illustrations). Additionally, they undergo a 3-day gas nitriding process, enhancing their corrosion resistance, fatigue strength, and vibration resistance, among other factors. All our tables come with adjustable legs. The minimum height adjustment range is 620 mm, while the maximum is 665 mm, allowing for a variable working height of 820 to 865 mm. Additional available dimensions: • 1000 x 1000 x 200 • 2000 x 1000 x 200 • 1200 x 1200 x 200 • 1500 x 1000 x 200 • 1500 x 1500 x 200 • 1500 x 2000 x 200 • 2000 x 3000 x 200 • 3000 x 1500 x 200 • 3000 x 2000 x 200 • 4000 x 2000 x 200 Please note that the images are not to scale and are for illustrative purposes only. Our welding tables are produced for our distribution brand "GERD WOLFF Maschinenfabrik" by a reputable manufacturer. 3D Welding Table - 3D Clamping Fixtures - 3D Precision Welding Table

Condition: new, Year of construction: 2025, diameter 28 mm Fgedpfx Adsymf Urj Njb length 50 mm clamping range 45-50 mm The price is exclusive of statutory VAT. Also available in D28 x 75 mm (clamping range 70–75 mm). Clamping range: 45–50 mm Type: Ball Lock Pin 50 mm Diameter: 28 ± 0.02 mm Material: 45# steel Hardness: HRC28–32 Surface roughness: Ra 0.8 µm GERD WOLFF ball lock pins are specialized fastening components designed for integration into a wide range of welding table systems and setups. Their main function is the efficient and precise positioning and securing of workpieces. These pins are compatible with welding tables from all manufacturers that feature 28 mm bore holes. The unique ball-lock design enables flexible alignment of workpieces at various angles and positions. Thanks to their high-quality manufacturing and robust construction, GERD WOLFF ball lock pins provide reliable holding force throughout the entire welding process. These pins allow for easy handling, fast clamping, and release of workpieces — without the need for additional tools. GERD WOLFF stands for quality and precision in welding technology. These ball lock pins are engineered to meet the high demands of professional welding applications. Quick release locking pins, quick lock pins, quick releases, quick installation pin, metal horizontal quick release, working pin, quick release locking pin, quick latch pin, locking quick release pins.

Condition: new, Year of construction: 2024, table length 1000 mm Fodpfxsymf Tue Ad Nsgb table width 1000 mm table height 200 mm weight 300 kg Our welding tables are manufactured with HT 300 casting quality. All welding tables are also available in a nitrided version. • Plate thickness: 25mm All our tables are equipped with adjustable legs. The minimum adjustment range is 620 mm, the maximum 665 mm. Thus, a working height of 820 - 865 mm is possible. Further details on the production and characteristics of our tables can be found in our catalogue. The illustrations do not correspond to the original size and are for llustration purposes only. 3D welding table - 3D clamping devices - 3D precision welding table

Condition: new, table length 3000 mm table width 2000 mm table height 200 mm weight 1700 kg Manufacturer: GERD WOLFF Technical Details: • Length 3000 mm • Width 2000 mm • Height 200 mm • Weight 1700 kg • Hole diameter 28 mm • Hole spacing 100 mm • Plate thickness: 25mm Advantages and Features: • 3-day gas nitriding process • Increased corrosion resistance • Weld spatter adhesion protection • Maximum load capacity • Enhanced fatigue strength • Improved vibration resistance • Fine scale engraving • Reinforcement with welded seams and ribs on the underside • Optimal working height of 820-865 mm • 8 height-adjustable support legs • Available with a matching accessory set (optional) • Plate thickness: 25mm Our welding tables are manufactured using HT 300 cast iron and are nitrided as a whole after mechanical processing. Furthermore, they feature precise fine scale engraving using laser technology. To ensure adequate stability, our welding tables are reinforced with welded seams and ribs on the underside (see illustrations). Additionally, they undergo a 3-day gas nitriding process, enhancing their corrosion resistance, fatigue strength, and vibration resistance, among other factors. All our tables come with adjustable legs. The minimum height adjustment range is 620 mm, while the maximum is 665 mm, allowing for a variable working height of 820 to 865 mm. Additional available dimensions: • 1000 x 1000 x 200 Fgsdpfjymf R Hjx Ad Njb • 2000 x 1000 x 200 • 1200 x 1200 x 200 • 1500 x 1000 x 200 • 1500 x 1500 x 200 • 1500 x 2000 x 200 • 2000 x 3000 x 200 • 3000 x 1500 x 200 • 3000 x 2000 x 200 • 4000 x 2000 x 200 • 2400 x 1200 x 200 Please note that the images are not to scale and are for illustrative purposes only. Our welding tables are produced for our distribution brand "GERD WOLFF Maschinenfabrik" by a reputable manufacturer. 3D Welding Table - 3D Clamping Fixtures - 3D Precision Welding Table

Condition: new, Year of construction: 2025, table length 1000 mm table width 2000 mm table height 200 mm weight 650 kg Manufacturer: GERD WOLFF Fgedpfsymf I Sox Ad Nsb Technical Details: • Length 2000 mm • Width 1000 mm • Height 200 mm • Weight 650 kg • Hole diameter 28 mm • Hole spacing 100 mm • Plate thickness: 25mm Advantages and Features: • 3-day gas nitriding process • Increased corrosion resistance • Weld spatter adhesion protection • Maximum load capacity • Enhanced fatigue strength • Improved vibration resistance • Fine scale engraving • Reinforcement with welded seams and ribs on the underside • Optimal working height of 820-865 mm • 4 height-adjustable support legs • Available with a matching accessory set (optional) Our welding tables are manufactured using HT 300 cast iron and are nitrided as a whole after mechanical processing. Furthermore, they feature precise fine scale engraving using laser technology. To ensure adequate stability, our welding tables are reinforced with welded seams and ribs on the underside (see illustrations). Additionally, they undergo a 3-day gas nitriding process, enhancing their corrosion resistance, fatigue strength, and vibration resistance, among other factors. All our tables come with adjustable legs. The minimum height adjustment range is 620 mm, while the maximum is 665 mm, allowing for a variable working height of 820 to 865 mm. Additional available dimensions: • 1000 x 1000 x 200 • 2000 x 1000 x 200 • 1200 x 1200 x 200 • 1500 x 1000 x 200 • 1500 x 1500 x 200 • 1500 x 2000 x 200 • 2000 x 3000 x 200 • 3000 x 1500 x 200 • 3000 x 2000 x 200 • 4000 x 2000 x 200 • 2400 x 1200 x 200 Please note that the images are not to scale and are for illustrative purposes only. Our welding tables are produced for our distribution brand "GERD WOLFF Maschinenfabrik" by a reputable manufacturer. 3D Welding Table - 3D Clamping Fixtures - 3D Precision Welding Table

Condition: new, table length 4000 mm table width 2000 mm table height 200 mm weight 2400 kg Manufacturer: GERD WOLFF Technical Details: • Length 4000 mm • Width 2000 mm • Height 200 mm • Weight 2400 kg • Hole diameter 28 mm • Hole spacing 100 mm • Plate thickness: 25mm Advantages and Features: • 3-day gas nitriding process • Increased corrosion resistance • Weld spatter adhesion protection • Maximum load capacity • Enhanced fatigue strength • Improved vibration resistance • Fine scale engraving • Reinforcement with welded seams and ribs on the underside • Optimal working height of 820-865 mm • 8 height-adjustable support legs • Available with a matching accessory set (optional) Our welding tables are manufactured using HT 300 cast iron and are nitrided as a whole after mechanical processing. Furthermore, they feature precise fine scale engraving using laser technology. To ensure adequate stability, our welding tables are reinforced with welded seams and ribs on the underside (see illustrations). Additionally, they undergo a 3-day gas nitriding process, enhancing their corrosion resistance, fatigue strength, and vibration resistance, among other factors. All our tables come with adjustable legs. The minimum height adjustment range is 620 mm, while the maximum is 665 mm, allowing for a variable working height of 820 to 865 mm. Additional available dimensions: • 1000 x 1000 x 200 • 2000 x 1000 x 200 • 1200 x 1200 x 200 Fgjdpfjymf H Uox Ad Njb • 1500 x 1000 x 200 • 1500 x 1500 x 200 • 1500 x 2000 x 200 • 2000 x 3000 x 200 • 3000 x 1500 x 200 • 3000 x 2000 x 200 • 4000 x 2000 x 200 • 2400 x 1200 x 200 Please note that the images are not to scale and are for illustrative purposes only. Our welding tables are produced for our distribution brand "GERD WOLFF Maschinenfabrik" by a reputable manufacturer. 3D Welding Table - 3D Clamping Fixtures - 3D Precision Welding Table

Condition: new, neu ca. 3-6 Wochen ab Auftrag Türkei 5010 € 96.69 € Fodpfjx Urqwsx Ad Njgb 100 kg 150 mm 150 mm 360 ° 120 kgm 230 / 50 V / Hz 0.25 kW 0.25 kW 0.1 - 3 U/min 30 s 350 mm M12x6 mm 690 mm The positioners are available in standard sizes for load capacities from 150 kg to 3,000 kg. The frame is optimally designed for rotation and tilting operations. The positioners consist of a motor, gearbox, table tilting system, steel gears, and control system and are structurally optimally protected. For heavy workpieces, the positioners are mounted on the floor. The tables have radial T-slots that enable quick clamping of the workpieces. Tilting and rotation are controlled by steel gears. For safety, the positioner is equipped with a reduction gear that holds the table in the desired position. Foot pedal Cable for signal to welder Touchpanel for following functions: - rotation speed - operating modi (manual, segmentcycle, full circle) OPTION: Pneumatic centering attachement

Condition: new, neu ca. 3-6 Wochen ab Auftrag Türkei 24400 € 468.48 € 3000 kg 150 mm 150 mm Fjdpjx Urqdjfx Ad Nogb 360 ° 135 kgm 400 / 50 V / Hz 1.1 kW 1.1 kW 1200 mm 700 - 950 mm The hydraulic positioners are available in standard sizes for load capacities from 1.000 kg to 3.000 kg. The frame is optimally designed for rotation and tilting operations. The positioners consist of a motor, gearbox, table tilting system, steel gears, and control system and are structurally optimally protected. For heavy workpieces, the positioners are mounted to the floor. Tilting and rotation are controlled by steel gears. For safety, the positioner is equipped with a reduction gear that holds the table in the desired position. The rotation speed can be adjusted via a potentiometer.

Condition: new, table diameter 340 mm table load 160 horizontal kg. table load 100 vertikal kg. swivelling range 0 - 90.0 Grad turning speeds 0.6 - 6.0 U/min bore 60.0 mm motor 230 Volt weight of the machine ca. 56.0 kg range L-W-H 385 x 340 x 375 mm Furnishing: - The table can be adjusted at an angle of 0 to 90 degrees tilt and jam - Start / stop via a location-independent foot switch. - Direction of rotation can be selected right / left. - Adjustable rotation time - The turntable has a 60 mm hollow shaft - The turntable has a diameter of 340 mm. The surface is chrome-plated for Protection against welding spatter. - The table speed is adjustable from 0.6 - 6 rpm. - The control of the welding machine via the turntable control is possible. - The ground contact transmits 300 A / 100%. - The turntable and the control are separate. - HF protected. - COM 1800 control with lap welding - Operating instructions in German Functions COM 1800 control: - Right/left rotation - Infinitely variable speed control - Welding torch on/off - Overlap welding adjustable - Controller for rotation time (2-stroke / 4-stroke) - Speed display Fjdpfx Adjxabm Ne Negb

Condition: new, table diameter 500 mm table load 300 horizontal kg. table load 150 vertikal kg. swivelling range 0 - 90.0 Grad turning speeds 0.2 - 2.5 U/min Fsdpfx Aexabl Ssd Nsgb bore 90.0 mm table height ~ 650 mm mm motor 230 Volt weight of the machine ca. 90.0 kg. range L-W-H 385 x 340 x 375 mm Furnishing: - The table can be tilted and clamped at an angle of 0 ° to 90 ° - manual tilting - Start / stop via location-independent foot switch - Direction of rotation can be selected right / left - Adjustable rotation time - The control of the welding machine via control - 350 amp ground connection Scope of delivery: - control (integrated) - foot switch

Condition: new, total power requirement 230 Volt table diameter 300 mm table load 100 Horizontal kg swivelling range 0 - 90.0 Grad turning speeds 0.2 - 2.0 U/min Fgedpfoxaatnox Ad Neb turning speeds 1.2 - 12.0 U/min bore 20.0 mm weight of the machine ca. 50.0 kg dimensions of the machine ca. 480 x 325 x 470 mm Furnishing: - Precise drive unit with face plate, on a stable floor stand. - clockwise / counterclockwise - 2 speed series, stepless - Swivel range from 0 ° - 90 °. Manual tilt - DC gear motor with worm gear, infinitely variable. - diameter of 300 mm. Chrome-plated surface to protect against weld spatter. - The device's control panel is easy to understand and use. - Start / stop via a location-independent foot switch. - The speed and direction of rotation are set on the machine. - HF protected. Scope of delivery: - control (integrated) - foot switch

Condition: new, table diameter 340 mm Fsdpfx Adjxaafqo Nogb table load 290 horizontal kg table load capacity 190 vertikal kg turning speeds 0.6 - 6.0 U/min spindle bore 60.0 mm swivelling range 0 - 90.0 Grad weight of the machine ca. 62.0 kg dimensions of the machine ca. 380 x 340 x 425 mm Furnishing: - The table can be tilted and clamped at an angle of 0 to 90 - Start / stop via a location-independent foot switch. - Direction of rotation can be selected right / left. - Adjustable rotation time. - The turntable has a 60 mm hollow shaft. - The turntable has a diameter of 340 mm. The surface is chrome-plated for Protection against welding spatter. - The table speed is adjustable from 0.6 - 6 rpm. - The control of the welding machine via the turntable control is possible. - The ground contact transmits 300 A / 100%. - The turntable and the control are separate. - HF protected. - Operating instructions in German Functions of the COM 1000 control: - Right / left rotation - stepless speed control - welding torch on / off - Control for turning time

Condition: new, neu ca. 2 - 4 Wochen ab Auftr 995 € 1200 x 800 mm 150 kg 16 mm THIS MODEL IS DESIGNED FOR BEGINNERS AND FOR PROCESSING LIGHTER AND SMALLER WORKPIECES. Our tables are characterised by the high degree of hardness with our Cr75M+ hard chrome plating, the very high degree of accuracy of +/- 0.05 mm on the entire table surface and the tolerances of the hole diameters of the entire hole pattern. 2D standard welding and clamping table, 1200 x 1200 with Cr75M+ hard chrome plating Table system: 16 mm Material thickness: 12 mm Including table substructure and standard table legs * S355J2+N with Cr75M+ hard chrome plating * Hole: 16 mm, material thickness: 12 mm Fjdpfx Ajyq Suged Nsgb * Including coated table substructure * Table top with 2-sided fine scaling and 50 x 50 mm grid line * Rounded edges and holes * Solid standard table legs with load capacity 1 tonne per leg; 500 kg per leg for castor model

Condition: new, Year of construction: 2025, neu 2025 020157 prompt, Zwischenverkauf v Türkei 6320 € 121.98 € 1 250 kg 150 mm 150 mm 360 ° 360 kgm 230 / 50 V / Hz 0.37 kW 0.25 kW 0.1 - 3 U/min 30 s 600 mm M16x6 mm 550 mm The positioners are available in standard sizes for load capacities from 150 kg to 3,000 kg. The frame is optimally designed for rotation and tilting operations. The positioners consist of a motor, gearbox, table tilting system, steel gears, and control system and are structurally optimally protected. For heavy workpieces, the positioners are mounted on the floor. The tables have radial T-slots that enable quick clamping of the workpieces. Tilting and rotation are controlled by steel gears. For safety, the positioner is equipped with a reduction gear that holds the table in the desired position. Foot pedal Cable for signal to welder Fedpfxeyq St Ns Ad Nsgb Touchpanel for following functions: - rotation speed - operating modi (manual, segmentcycle, full circle) OPTION: Pneumatic centering attachement

Condition: new, neu ca. 3-6 Wochen ab Auftrag Türkei 11000 € 211.2 € Fedpfx Aeyq St Asd Njgb 1000 kg 150 mm 150 mm 360 kgm 230 / 50 V / Hz 0.55 kW 0.75 kW 0.1 - 3 U/min 60 s 1200 mm M20X6 mm 1000 mm The positioners are available in standard sizes for load capacities from 150 kg to 3,000 kg. The frame is optimally designed for rotation and tilting operations. The positioners consist of a motor, gearbox, table tilting system, steel gears, and control system and are structurally optimally protected. For heavy workpieces, the positioners are mounted on the floor. The tables have radial T-slots that enable quick clamping of the workpieces. Tilting and rotation are controlled by steel gears. For safety, the positioner is equipped with a reduction gear that holds the table in the desired position. Foot pedal Cable for signal to welder Touchpanel for following functions: - rotation speed - operating modi (manual, segmentcycle, full circle) OPTION: Pneumatic centering attachement

Condition: new, neu ca. 3-6 Wochen ab Auftrag Türkei 7730 € 149.19 € 500 kg 150 mm 150 mm 360 kgm 230 / 50 V / Hz 0.37 kW 0.37 kW 0.1 - 3 U/min 45 s 800 mm M20X6 mm 640 mm The positioners are available in standard sizes for load capacities from 150 kg to 3,000 kg. The frame is optimally designed for rotation and tilting operations. The positioners consist of a motor, gearbox, table tilting system, steel gears, and control system and are structurally optimally protected. For heavy workpieces, the positioners are mounted on the floor. The tables have radial T-slots that enable quick clamping of the workpieces. Fedpfx Aeyq Stved Nogb Tilting and rotation are controlled by steel gears. For safety, the positioner is equipped with a reduction gear that holds the table in the desired position. Foot pedal Cable for signal to welder Touchpanel for following functions: - rotation speed - operating modi (manual, segmentcycle, full circle) OPTION: Pneumatic centering attachement

Condition: new, neu Fjdpjyq Sp Rsfx Ad Nogb ca. 2 - 4 Wochen ab Auftr 929 € 16 mm Starter set for anyone who wants to work professionally and efficiently contains the most important tools as basic equipment. Consisting of: 4 pieces screw clamp 180° HIS16Z3000 4 pieces stop bracket 90x37.5mm HIS16WA9037 4 pieces stop bracket 90x90mm HIS16WA9090 4 pieces stop bar 115mm HIS16FA11512 pieces quick clamping bolt short HIS16SB100 1 piece cleaning brush HIS16RB 1 piece torch holder HIS16BH 1 piece cleaner HIS-Cleaner-1L 1 piece anti-adhesive agent HIS-Premium-1L OPTION: Tool trolley HIS16WW1000 € 449,--

Condition: used, gebraucht 2468D prompt, Zwischenverkauf v Deutschland 2970 € 1 1890 € Fjdpfxsyq Spqo Ad Negb 195 kg 28 mm DEMO SET / MINT CONDITION consisting of: * 1x accessories car (Delivery is galvanised) * 4x angle stop 350 x 20 mm * 4x adjustable angle stop 250 x 20 mm * 15x Adjustment clamp * 4x Multi-clamp * 6x Stand angle, adjustable 175 x 20 mm * 2x Stand angle, adjustable 225 x 21 mm * 8x Stop rail 225 x 20 mm * 10x Socket bolt * 15x Plug holder * 3x Ball Tension Bolt * 4x Claw clamping bolt 28 x 100 mm * 15x Spacer ring

Condition: good (used), Year of construction: 2008, functionality: fully functional, load capacity: 1,500 kg, total height: 1,500 mm, total length: 4,000 mm, total width: 3,500 mm, table height: 1,000 mm, table width: 3,050 mm, pivoting range: 90 °, table length: 3,500 mm, 3D welding and work table 3,500 x 3,050 x 810 mm stationary, partially equipped with 36 out of 70 grey cast iron rails 1,500 mm, transverse slots. With T-slot nuts. Fodsx Uqf Hspfx Ad Njgb

Condition: excellent (used), Year of construction: 2015, Complete robot welding cell with rotating table and enclosure Robot: KUKA KR 150 R2700 extra Load capacity: 150kg reach: 2.090mm with welding gun (Dalex, new in 2018) with cooling device (water cooling in circuit) complete second welding gun (make ARO) included own cooling unit built in the machine automatic rotary table with 10-fold division (at present for running product only 5-fold built up) Workplace for parts insertion or disposal well illuminated and protected by light barriers Control of the complete line by means of Siemens SPS, provided by company HS Automation Fsdpfonr E Enjx Ad Njgb Siemens control panel for system operation at the insertion station mounted on a swivel arm All together in an enclosure with safety door. Plant can still be visited in operation.

Condition: ready for operation (used), T-slot assembly table, T-slot table, T-slot welding table, Used machine Overall dimensions: Length: 740 mm Width: 550 mm Height: 540 mm Weight: 398 kg T-slot size: 50 x 20 mm Worktable size: Fsdov Il Evjpfx Ad Nogb Upper part: 660 x 550 mm Side part: 650 x 400 mm Worktable tiltable at 90˚

Condition: used, Work table with "swallowtail" fixed cuttings Fgodpfx Ashyxa Aed Nob Overall size:1100x1400x800 mm Weight: 1880 kg