An Example in Steel  Casting  --  Lever Arm in the BMW Engine Valve Train

Casting Process Selection


Conventional Gravity Investment Casting


Countergravity Low-Pressure Air
(CLA) Investment Casting
With the selection of investment casting, Hitchiner engineers faced two specific challenges in casting the lever arm.
  1. The lever arm has many detailed and precision features and fill-out is challenging.

  2. Metal yield must be maximized by minimizing metal retained in the gating system.

Hitchiner engineers had two investment casting processes from which to choose--

  • Conventional Gravity Casting

  • Countergravity Low-Pressure Air  (CLA)


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