Description: 
The Jucrank oscillating grinding machine from Junker is a versatile solution for the complete machining of crankshafts. All types of crankshafts from single-cylinder to twelve-cylinder crankshafts can be machined. Depending on the type of machining and the production quantity required, Junker designs custom platforms and wheel heads, and installs them on Jucrank machines. Economic advantages include: flexible adjustment for various numbers of cylinders by changing the CNC program, highly flexible grinding of main and pin bearings using oscillating axial grinding, high consistency of quality, using 'Learning Function Facility', long wheel life using CBN and oil coolant, advanced dressing system and control, controlled dimensional accuracy, using in process gauging and high precision, using single chucking. Technical advantages include: measurement and correction of roundness and dimensions during machining, process control using 'Learning Function', including automatic compensation for roundness deviation and other parameters. The parameters which may be compensated include temperature, mechanical and dynamic factors, stock removal variations, variation in material structure, grinding characteristics of the grinding wheel and the degree of machine wear. Since the main and pin bearings are ground in a single chucking, the deviation is theoretically zero. It enhances plunge grinding and oscillating grinding. Support of sensitive parts on main bearing is done using self-centring three-point steady rest. The CNC-controlled coolant nozzle ensures that it is always fed into the grinding zone.
