The Benefits of 420 Chrome Stainless Steel Coiled Spring Pins

In applications requiring a combination of high strength, superior fatigue life, and corrosion resistance, 420 martensitic chrome stainless steel offers a host of technical benefits and provides an overall robust cost-effective solution.

Valve Assembly

A valve train systems manufacturer was using a hollow, machined rod in the assembly of a valve assembly. This component makes the link between the plunger and the spool. These are the components that allow the assembly to complete a cycle. Due to the fact that the rod is the link between the plunger and spool, it is a very critical component. One of the requirements of this product (used as the link) is that oil needed to pass through the ID of the part.

The machined component had a solid wall with a hole drilled in its center. Due to the fact that it was stainless steel, the run time to produce a single component was extensive. Even though the machined component met the performance requirements of the application, the customer wanted to reduce the cost of this expensive rod.
app pins valve assembly
Due to the critical characteristics of the application, a standard roll-formed pin could not be used. SPIROL Engineering worked with the customer to design a special roll-formed component that could be used in place of a machined component at a fraction of the cost. The original component was roughly $0.125 per piece. The pin that SPIROL proposed was priced at $0.05 per piece.

All testing concluded that our pin performed the same as their original machined pin. With the customer incorporating this design into their assembly, they were presented with a $105,000 annual savings.

SPIROL's Application Engineers have over 70 years of experience in design, production techniques, and installation methods of components used in the joining and assembly processes. Starting with your objective, our Application Engineers will determine the best component for the assembly that meets your specific requirements at the lowest total cost. Consideration is given to component design, assembly costs, and manufacturing objectives.

Need help finding the right solution?

SPIROL offers complimentary Application Engineering support. We will assist on new designs as well as help resolve issues, and recommend cost savings on existing designs.