NAXOS-UNION - PM 2: High performance – low price

11/12/2007 - Oliver Hagenlocher


With its PM 2, NAXOS-UNION rounds down its machine programme for the grinding of crankshafts.

It will be a big success! Those responsible at NAXOS-UNION are sure of that. At EMO the PM 2 will hit the market. A machine for the grinding of crankshafts with a length of up to 500 mm. It is part of a completely new machine generation that consistently impresses the market sector with its attractive price-performance ratio.

“We are very much in business when it comes to the larger machines for the grinding of crankshafts”, defines Dr. Jens Muckli – executive of NAXOS-UNION – the company’s position in the market place. “What we neglected to do till now is round down our machine programme.” But that is now part of the past. In time for EMO, NAXOS-UNION will present the new, smaller machine – the PM 2. From a technological viewpoint it is in every way the equal of its “bigger sisters”. This can already be seen in its model code – the “P” stands for “pins” and the “M” for “mains” – which indicates that pin bearings and main bearings can both be ground in a single set-up.

The size of the machine does not represent a compromise either. It is designed to handle workpiece lengths of up to 500 mm and weights of 30 kg, targeting the sector for passenger car and motorcycle engines (2-, 3- and 4-cylinders) and smaller units. The machine in its basic execution features a grinding spindle headstock with a 30 kW motor spindle, a direct driven work head, a linear motor for the X-axis, a sturdy tailstock and a back rest. This gives the PM 2 all the necessary features of a modern, efficient crankshaft grinder. The PM 2 is a hook-up-and-install machine, with electrical cabinet and energy container located within the machine enclosure. The possibility to connect the machine to an automated loading system or an external grinding dust extractor is ensured.

“We were absolutely determined to develop the PM 2 with all eyes firmly on an acceptable market price.” With these words Gerald Heller, head of the design department at NAXOS-UNION, offers an insight into his terms of reference. “It is the reason why it has become a completely new machine.” The idea was a comparatively simple one. As many modules and machine components as possible should be the same as those in other grinders of similar size and with similar applications already produced by the Group. So, Gerald Heller met his colleagues from Kopp and Karstens, who are also part of the Group, to work on a solution together. What came of it is certainly something to be proud of.

NAXOS-UNION has done the splits with the PM 2, by combining the high-tech demands of the grinding technology with customers’ demands for precision, high performance, reliability and simplicity of operation.
“To succeed in transferring the characteristics of the larger machines to their ‘little sister’, without having to compromise, makes a major difference to the competition”, is how Rainer Lessmann (of Technical Sales at NAXOS-UNION) explains the position of the new NAXOS-UNION machine in the market. A great deal has always been expected of NAXOS-UNION: excellent grinding results, short cycle times and a high degree of machine availability – these are the criteria to be fulfilled. It goes without saying that the enclosure of the compact little machine is 100% leak proof, or that NAXOS-UNION, with their decades of experience, can successfully deal with crankshafts developing “a life of their own” during grinding.

Pin chasing will be just as much a standard operation on the PM 2 as the use of CBN grinding wheels. There will also be no cutbacks regarding the in-process measuring of diameters during grinding and the integration of concentricity checks, where they are required. The NAXOS-UNION software provides for a perfect grinding process – coupled with a high degree of process integrity. But that is not all. The PM 2 is designed to accept both emulsion and oil as coolant.
But how can a machine, with so many high-tech features, be so competitively priced? “ We have come up with a new definition of the modular system, both in-house and for the EMAG Group as a whole, by developing and/or modifying machine modules that can be used by our sister companies”, is Gerald Heller’s answer. For instance, besides a multitude of other components, the machine base is also the same as the one used at Kopp and Karstens. That means the EMAG factory at Zerbst (Saxony-Anhalt) can produce these machine bases in larger numbers. And this reduces production costs quite considerably!

NAXOS-UNION sales personnel belief the market demand for a smaller machine to grind the smaller crankshafts will be high. Is the new PM 2 equally attractive to OEMs and sub-contractors? “This justifies an emphatic YES”, is Rainer Lessmann’s reply. And he shows the extent of his conviction. After all, market and costing conditions are the same for everyone. “Which is why we see in the PM 2 great prospects for growth and a considerable sales potential for our company”, enthuses Dr. Jens Muckli over the sales drive at EMO.


Oliver Hagenlocher

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