• PMD 2
  • PM 310 / PM 320
  • PM 430 / PM 460
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PM 310 / PM 320

Crankshaft grinders PM 310 / 320 for the manufacturing of crankshafts with a length of up to 1,250 / 1,750 mm

For decades NAXOS-UNION crankshaft grinders held a prominent place in the worldwide manufacturing of engine components for passenger and commercial vehicles. By now their combination of CBN technology and the pin chasing process has become the accepted industry standard for crankshaft grinders.

NAXOS-UNION was the first to apply linear motor technology to the process and now offers highly dynamic drive systems to satisfy production requirements.

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Crankshaft grinders – high-tech grinding technology, precision and reliability

PM 310 / 320 – Crankshaft grinders for the manufacturing of workpieces with a length of up to 1,250 / 1,750 mm (50 / 69 inch) and a weight of up to 150 / 200 kg (330 / 440 lb). The crankshaft grinders combines high-tech grinding technology with precision, reliability and ease of operation.

The modular system allows the configuration of a multitude of machine variants. The main and pin bearings can be machined in a single setup on the same crankshaft grinder or on two different crankshaft grinders, following the traditional concept, the decision depends on production requirements.

These crankshaft grinders were designed to produce crankshafts for passenger car and HGV engines.

Technical Data

Swing diameter mm
Workpiece length, max. mm
1,250 / 1,750
49 / 69
Grinding wheel dia. mm
650 / 700
25.5 / 27.5
Workpiece weight, max. kg
150 / 200
330.5 / 441

Images / Videos


  • The possibility to grind the main and pin bearings of crankshafts with suitable workpiece configurations in a single set-up
  • The possibility to pre- and finish-grind in a single set-up
  • Chasing of the pin bearings, with the workpiece centrically clamped
  • X-axis drive system with linear motor
  • Hydrostatic guideways (X and Z-axis)
  • Use of CBN technology, also for the grinding of radii and shoulders
  • Adaptive in-process measuring controls
  • Grinding spindle with direct drive power rating of up to 97 kW
  • Work headstock with direct drive
  • Enclosure decoupled from machine
  • Coolant: emulsion or oil, according to customer preference
  • Automated or manual loading


  • Workpieces
  • Technologies

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