A dual-use battery-operated portable grinder is utilized for the railway industry, specifically for grinding the web of railroad rails post-welding. The battery-operated portable grinder can be employed in a hand-held configuration or seamlessly integrated with a quick-connect mechanism onto a specialized frame device, serving as both a support structure for the grinder and a means for reducing worker strain by eliminating the need for bending. The battery-operated portable grinder may include: battery-powered operation, a robust brushless motor, a built-in handle-incorporated base portion for safeguarding the motor from potential damage, a lightweight design, an anti-vibration handle to alleviate operator fatigue and ensure proper balance during usage, a reinforced shaft to enhance operational durability, improved grinding wheel stability to minimize vibration and wear during use, and its versatility in performing rail head and web grinding tasks.

A rail grinding machine contains a machine frame, rail guide units arranged on the machine frame, a grinding unit with a drive motor and a tool holder for driving a grinding tool in rotation about an axis of rotation, a height adjustment device for adjusting the height of the grinding unit and a handle for manually moving the grinding unit. A guide of the height adjustment device defines a guide plane. The axis of rotation is spaced apart from the guide plane, in particular in the region of the tool holder. As a result, the rail grinding machine has a simple configuration and is convenient to use. In particular, the rail grinding machine enables an unrestricted view of a grinding point.