{"id":"grob-g550a","model_id":"G550a","name":"GROB G550a","summary":"The GROB G550a is a 5-axis universal machining center with a horizontally arranged motorized spindle. It has three linear axes (X, Y, Z) and two rotary axes (A and B), which allow 5-sided machining and 5-axis simultaneous interpolation. It is built for milling applications in mechanical engineering, automotive and die/mold work, and can be extended with pallet changers and pallet storage systems for automation.","study_notes":["Working travels are 800 mm (X), 950 mm (Y) and 1,020 mm (Z); maximum axis speeds are 60 m/min (X), 42 m/min (Y) and 60 m/min (Z).","Interference diameter is 900 mm.","Positioning accuracy in the X/Y/Z axes is 0.006 mm.","Chip-to-chip time t1 is 4.8 s at 12,000 rpm, according to VDI 2852.","Table diameter is 770 mm.","Total weight is 25,200 kg with pallet changer and 21,500 kg without.","Five motorized spindle versions are offered: HSK-A63 83 Nm at 12,000 rpm, HSK-A63 206 Nm at 16,000 rpm, HSK-A63 47 Nm at 18,000 rpm, HSK-A100 575 Nm at 9,000 rpm, and HSK-A100 340 Nm at 10,000 rpm.","A-axis swivel range is 230 degrees; B-axis swivel range is 360 degrees.","Tool length for the single disk-type tool magazine is 465 mm outside (HSK-A63); for the compact double disk-type tool magazine it is 500 mm outside and 200 mm inside (HSK-A100).","Automation options are a pallet changer, a linear pallet storage system (PSS-L) and a rotary pallet storage system (PSS-R) for up to 13 pallets.","High-pressure cutting fluid systems are available at 23, 5-40 and 10-80 bar; hand-held controller options are SIEMENS or HEIDENHAIN.","A stated example is a steel vise bottom part of 415 x 130 x 115 mm machined with a 9,000 rpm motorized spindle at 65 kW / 575 Nm."],"safety_notes":[],"sources":[{"url":"https://www.grobgroup.com/en/products/product-range/universal-machining-centers/milling-centers/g550a/","title":"G550a","accessed":"2026-10-26"}],"verification":{"status":"source_checked","checked_at":"2026-10-26","values":8,"method":"llm_source_check"},"updated_at":"2026-10-26","type":"hardware","spec":{"category":"cnc_mill","manufacturer":"grob","controllers":[],"axes":5,"weight_kg":21500,"travel_x_mm":800,"travel_y_mm":950,"travel_z_mm":1020,"rapid_traverse_m_min":60,"table_load_kg":700,"joints":[],"protocols":[],"standards":[],"error_codes":[]},"url":"https://machineschema.com/hardware/grob-g550a","license":"https://creativecommons.org/licenses/by/4.0/"}