Mikrosa ABIR M 500

The Mikrosa ABIR M 500 is a large-format CNC centerless grinding machine from Mikrosa (United Grinding Group), designed for high-volume grinding of large cylindrical components up to 500 mm diameter in infeed mode. The ABIR designation refers to Mikrosa's heavy-duty centerless grinding platform for large industrial components — a series step above the KRONOS M range — targeting applications in wind energy, heavy industrial machinery, railway, and large bearing manufacturing where component diameters and weights exceed what the KRONOS series can accommodate. At 500 mm maximum infeed diameter, the ABIR M 500 is among the largest production centerless grinding machines manufactured anywhere, covering a segment where most alternatives require a large cylindrical OD grinder with centers or chuck fixturing.

The ABIR M 500 is built on an exceptionally massive Granitan mineral casting base — the largest machine in the Mikrosa lineup by machine weight and footprint — with correspondingly large grinding and regulating wheel assemblies. The grinding wheel diameter is 750 mm, which in the ABIR M 500's operating range of 100-500 mm workpiece diameters provides the contact area, wheel life, and material removal capacity needed for production grinding of large rings, sleeves, and thick-walled cylinders. Wheel peripheral speeds reach up to 63 m/s with appropriate wheel specification. The regulating wheel is proportionally large at 400 mm diameter, providing stable support and consistent workpiece rotation control for components that can weigh 50 kg or more in the upper diameter range.

Mikrosa's ABIR series supports heavy-duty infeed grinding as its primary mode, given that through-feed of workpieces in the 200-500 mm diameter range is rarely practical in production settings. Infeed grinding on the ABIR M 500 is managed by the Siemens 840D sl control with Mikrosa's proprietary grinding parameter software, which handles the complex interaction of infeed rate, sparking-out dwell time, wheel dressing frequency, workpiece rotation, and post-process gauging to achieve consistent diameter and surface finish across large production batches. Loading and unloading of heavy workpieces is invariably accomplished by robotic or gantry automation given the component weights involved.

New ABIR M 500 systems are priced in the $700,000 to $1,100,000 range, reflecting the machine's exceptional size, the specialized Granitan casting, and the premium Siemens 840D sl control platform. This investment level targets large manufacturing organizations — bearing manufacturers producing industrial and wind energy bearing rings, railway component suppliers grinding axle journals, and heavy equipment manufacturers grinding large shaft components — where the ABIR M 500's production centerless grinding throughput is the only economically viable alternative to cylindrical grinding with centers, which would require multiple machines to match the ABIR's output.