Actuator Shaft2021-07-16T16:17:04+00:00

Actuator Shaft with Enhanced Bushing Surfaces for an EGR Assembly

Actuator ShaftProblem:

This actuator shaft for an EGR assembly was being made from a high cost, solid T-800 alloy. The expensive shaft failed from fractures induced in assembly and in-service. A more robust design was needed to resist damage and failure, while still retaining the benefits of the T-800 alloy: specifically high temperature wear and oxidation resistance, as well as low friction, anti-galling properties.


A more robust, durable design was created from a solid, 400 series stainless steel shaft, with HVOF coating of a T-800 alloy applied only in the 2 regions that required the special material properties. These 2 regions mate with high performance bushings.


Successful integration of long-life, heat resistant coating which eliminated the assembly damage problem and provided the required performance in-service at a lower overall cost. The new shaft with coating integrated into the bushing areas provides easy assembly and reliable performance in the demanding service environment.

Value Statement:

Precision Coatings helped improve the product design and continues provide reliable, FULL-SERVICE complete component supply and high volume production of 10,000-80,000 annually.


Emissions control actuator shaft with high temperature, wear resistant, low friction coating to prevent galling and oxidation.

  • Design Engineering /Product Development
  • Complete Component Supply
  • HOVF Spray Coating
  • Machining of basic shaft
  • Centerless Grinding
  • High Volume Production
  • High Temperature Oxidation Resistance
  • Abrasion Resistance
  • Wear Resistance
  • Anti-Galling
  • Low Friction

Diesel Engine Emissions Control

10,000 – 80,000 per year

Ongoing to meet production demand

Customer Defined Specifications