Crankshaft Grinder Equipped with Twin Grinding Heads

Emag’s PMD 2 crankshaft grinder incorporates the company’s Naxos-Union technology and is said to provide high output rates.

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Emag’s PMD 2 crankshaft grinder incorporates the company’s Naxos-Union technology and is said to provide high output rates. Designed for machining passenger car crankshafts, the machine features twin grinding heads that enable simultaneous grinding of two pin or main bearings in a single setup using the two CBN grinding wheels. The wheels can be arranged very close together if required, enabling simultaneous machining of the adjoining pin and main bearings. The machine’s capacity covers small components ranging to 500 mm in length. 

The grinding machine is equipped with a direct-drive spindle, hydrostatic guideways and a linear motor in the X axis, as well as an in-process measuring control that enables roundness monitoring and correction in the machine. According to the company, the operator enters the relevant command in the control and the measuring process is carried out once the bearing has been ground. Software developed by Emag then calculates the relevant correction values from the remaining roundness errors, enabling subsequent manufacturing processes to be successively optimized.

The PMD 2 grinder features a compact, flexible construction with the electrical cabinet included in the enclosure. The machine can easily be equipped with an automatic loading system. Both emulsion and oil can be used as coolants. According to the company, the crankshaft grinder can be integrated into an existing production line or used as a stand-alone machine with manual loading.

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