Drive shaft monobloc

Jansen produces welded-drawn precision steel tubes made of high-tensile materials for one-part drive shafts. The tubes for the one-part drive shafts (monobloc) are cold-formed during manufacturing. For this reason, manufacturers of monobloc drive shafts greatly value identical reshaping properties and high levels of dimensional stability in the delivery condition of the tubes. Additionally, after inductive hardening, high strength values with low levels of surface decarburisation are required. The trend towards light-weight design increasingly demands high-strength materials, which allow weight reductions with comparable physical properties.

Tube requirements

  • Very good formability
  • High torsional strength and durability
  • Excellent hardening properties
  • High geometrical accuracy (eccentricity, roundness)
  • Excellent surface condition

Material properties

  • High torsional strength and fatigue strength
  • Excellent reforming properties
  • Homogeneous strength properties and ductility
  • Excellent hardening properties
  • Excellent hardening properties

Structure

  • Homogeneous, fine-grain structure in weld seam and basic material
  • Minimised surface decarburisation of inner and outer surfaces (< 100 μm)
  • Very good weld seam quality
  • Very good reforming properties

Geometry

  • Minimised fluctuations in wall thickness and inner/outer diameter
  • Minimised deviations in concentricity and axial run-out
  • Minimised eccentricity
  • Specific tube end processing: sawn/brushed; chamfered, completely processed/chamfered

Surface

  • Excellent surface condition
  • Minimised surface flaws (adhesions, scratches, dents, etc.)
  • Minimised corrosion protection, optionally specific corrosion protection
Drive shaft monobloc