Available from United Grinding, the Mikrosa Kronos L 550 centerless external cylindrical grinding machine is designed for machining medium-sized shafts measuring 400 to 545 mm long for automotive applications. With its smaller grinding wheel driving power of 40 kW, the grinding machine offers an advantage over larger machines for these applications. Through-feed components such as shock-absorber piston rods, brake pistons, roller bearing rings and rolling elements can be ground on the system, as well as infeed components including camshafts, gear shafts and selector shafts.
The maximum grinding wheel diameter is 660 mm, while the regulating wheel has a maximum diameter of 400 mm. These diameter measurements are said to reduce auxiliary times because fewer tool changes are required. The Granitan machine bed is stable and vibration-damped for improved grinding precision. The infeed of both slides is achieved by servodrive via a pre-tensioned and backlash-free recirculating ballscrew, the company says. Linear measuring systems ensure exact positioning of the infeed axes with the grinding and regulating wheels. The work rest does not move during centerless grinding.