• Pin chasing
  • Diagonal grinding
  • Induction Heating
  • rollFEED® turning
  • Cylindrical grinding
  • ChamferCut
  • Drilling
  • ECM - Electro-Chemical Machining
  • ECM - Deburring
  • ECM - Drilling
  • ECM - Inner forming
  • PECM
  • Rotary Chamfer & Deburring
  • Grinding
  • Hard turning / Grinding
  • Induction hardening
  • Laser welding
  • Oilfield Technology
  • Out-of-round grinding
  • Heat Shrink Assembly
  • Power Skiving
  • Scroll-free Turning
  • Synchronous Support Grinding
  • Turning / Gear cutting
  • Vertical turning
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Pin chasing

Pin chasing technology

During pin chasing, the workpiece is centrally clamped compared to the main axis, and entirely machined in this position. The workpiece then rotates around its central axis. Pin bearings are ground using the pin chasing process while the workpiece rotation (C-axis) and tool movement (X-axis) are coupled using software technology.

This grinding technology and others are used in crankshaft grinding machines from EMAG Naxos.

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Pin chasing of crankshafts

Today, the “pin chasing process” combined with CBN technology has become the industry standard for crankshaft grinding.

Eccentric grinding of pin bearings is achieved by the pin chasing movement of the grinding wheel, which follows the oscillating movement of the pin bearing. This is accomplished by an infeed axis (X-axis) with hydrostatic guideway, which is driven by a linear motor. The addition of high-resolution measuring systems in the infeed axis and in the workpiece spindle (C-axis) lead to an extremely precise system that meets the high quality requirements for a crankshaft.

In order to correctly position the crankshaft for this machining operation, it is moved and measured radially and axially after loading with a fully automatic integrated measuring probe.

In order to achieve the strict requirements in terms of dimensional accuracy and roundness, the machine is additionally equipped with an in-process measuring system that measures the required values directly from the pin and main bearings during the grinding process.

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Advantages

  • Maximum shape and surface quality
  • No need for complex eccentric crankshaft clamping
  • In-process measuring system for high precision
  • High process reliability through complete machining in a single clamping operation
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