page_title: High-speed grinding
section_title: Principle
hierarchical_section_title: High-speed grinding / Principle
caption_attribution_description: English: Principle of High Speed Grinding Deutsch: Prinzip High Speed Grinding
context_page_description: High-speed grinding is a rail care concept developed by the company Stahlberg Roensch from Seevetal, Germany. It is based on the principle of rotational grinding and serves to grind rails at up to 100 kilometres per hour.
context_section_description: HSG is based on the principle of circumferential grinding. Cylindrical grinding stones are pulled over the rail at an angle, inducing rotation as well as an axial grinding motion. The grinding stones are mounted on grinding units hauled by a carrier vehicle.
  Two things are achieved with this motion: First, the required material removal rate is obtained through the relative motion between grinding stone and rail. Second, by rotating the stones, overheating, glazing and uneven wear of the stones is prevented.
  The usual grinding speed on Deutsche Bahn's rail network is 80 kilometres per hour (50 mph).
caption: Principle of high-speed grinding
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