Groove depth and preparation
Just as a screw needs a correctly tapped hole, retaining rings need properly cut grooves for best performance. Groove walls should be parallel to one another, while being perpendicular to the axis of the shaft or housing.
When a load is applied, it creates a lever action against the loaded groove wall. Under extreme loads, this can lead to deflection of the ring and ultimately to failure, especially when an incorrect ring type is used. Using the correct ring and verifying groove geometry early in the design process is essential.
Read the full article in DPA's August 2025 issue