This standard applies to transportable bench grinders that can be equipped with one or two accessories as follows: - type 1 grinding wheels in accordance with ISO 603-4 with a diameter not exceeding 310 mm and a thickness not exceeding 55 mm; - wire brushes with a diameter not exceeding 310 mm and a thickness not exceeding 55 mm; - polishing wheels with a diameter not exceeding 310 mm; and with a peripheral speed of any accessory between 10 m/s and 50 m/s. NOTE Polishing wheels are also known as buffing wheels.