{"id":"grob-g520","model_id":"G520","name":"GROB G520","summary":"The GROB G520 is a two-spindle modular machining center for automotive series production. It machines two parts in parallel and can be equipped with an integrated pallet changer to handle dissimilar parts without change-over times. Working travels are 750/1,000/870 mm in X/Y/Z, with maximum axis speeds of 95/70/120 m/min.","study_notes":["Working travels X/Y/Z: 750/1,000/870 mm. Maximum axis speeds X/Y/Z: 95/70/120 m/min.","Positioning accuracy X/Y/Z: 0.006 mm. Chip-to-chip time t1: 2.1 s according to VDI 2852.","Interference diameter: 2 x 798 mm.","Total weight: 22,500 kg without pallet changer, 28,500 kg with pallet changer.","Table load: 2 x 625 kg without pallet, 2 x 525 kg with pallet (A-/B-axis).","Typical crankcase machining example: motorized spindle 18,000 rpm, 29 kW / 34.6 Nm.","Motorized spindle versions include HSK-A63 and HSK-A100 with ratings from 6,000 to 18,000 rpm and 47 Nm to 344 Nm.","CNC control options: SIEMENS (standard), FANUC (option); specific controller models are not stated.","Tool magazine options: single-disk, double-disk and triple-disk; tool pockets in the magazine are expandable.","GROB Spindle Diagnostics (GSD) monitors motorized spindle condition. GROB Chip-in-Spindle Detection System (SiS) detects chips between the plain surface and spindle nose from 10 μm.","Loading options: top loading with agile loading gantry, Cartesian linear gantry or Cartesian linear gantry with telescope; front loading with automatic sliding changer or swiveling changer.","Axes are divided into tool side and part side according to the modular concept."],"safety_notes":[],"sources":[{"url":"https://www.grobgroup.com/en/products/product-range/machining-technology/g-modules/g520/","title":"Machining center G520","accessed":"2026-10-26"}],"verification":{"status":"source_checked","checked_at":"2026-10-26","values":6,"method":"llm_source_check"},"updated_at":"2026-10-26","type":"hardware","spec":{"category":"cnc_mill","manufacturer":"grob","controllers":[],"travel_x_mm":750,"travel_y_mm":1000,"travel_z_mm":870,"spindle_max_rpm":18000,"rapid_traverse_m_min":120,"joints":[],"protocols":[],"standards":[],"error_codes":[]},"url":"https://machineschema.com/hardware/grob-g520","license":"https://creativecommons.org/licenses/by/4.0/"}