Crankshaft

The basic crankshaft design is determined by the number of cylinders and engine layout. To reduce emissions, the mostly forged steel shafts must be increasingly optimised for weight. This requires additional machining steps for already complex components. At the same time, rising combustion pressures lead to higher bending and torsional loads – and therefore stricter quality requirements for dimensional accuracy, strength and surface quality.
Crankshaft with flange and journal surfaces, oil bores, central lightening bore and front bearing bore

Key features

  1. Flange and spigot Surface
  2. Oil bore
  3. Central relief bore
  4. Face bearing bore

PROCESS CONDITIONS
  • Multiple spot drilling
  • Bore depths up to 800 mm
  • Coordinated process parameters for simultaneous drilling and deburring
  • Coaxiality
  • Varying machining conditions due to casting fluctuations

1. Flange and spigot Surface

High‑performance face milling cutter NeoMill‑16‑Face for machining flange and spigot faces

NeoMill-16-Face
 
  • Maximum number of teeth and indexable inserts with 16 usable cutting edges for low costs per component.

2. Oil bore

Crankshaft with journal surfaces, oil bores, lightening bore and front bearing bore

MEGA-Deep-Drill-Steel

  • Optimised geography and HiPIMS coating for process-reliable deep drilling with high feeds.

3. Central relief bore

Tool for easy deburring and chamfering of drilled holes

TTD bore deburring tool
 
  • Replaceable head system with TTS connection and replaceable chamfer insert for forward and/or backward chamfering

4. Face bearing bore

Tools for roughing and finishing of holes, diameters and chamfers

1. Pre-machining
WP drill

  • Short, stable tool with multiple process steps integrated in one tool (roughing, boring, chamfering).
     

2. Finishing
High-performance reamer

  • Multi-blade plug-and-play reame for finishing diameter and chamfer.