Compact cordless burnishing machine for grinding, burnishing, brushing and high-gloss polishing of e.g. stainless steel. Robust motor for long service life. Spindle lock and tool-free flange nut for fast accessory change. Fast and tool-free adjustment of guard and side handle. Smooth-running, form-fit roller arbor for a uniform finish. Battery pack can be swivelled for better working in hard to reach places.