SPIROL Introduces New Precision Machined Compression Limiters to Protect Plastic Assemblies

SPIROL is pleased to introduce the new Series CL6000 lightweight, lead-free, Aluminum Precision Machined Compression Limiters. Compression Limiters are designed to reinforce high stress joints in plastic assemblies where bolts are used to connect two components to each other.


This customer is currently using a Coiled Pin to retain a pinion shaft in a differential carrier. The Coiled Pin does not experience any significant shear loading since the shaft functions basically like an axle for the gears in the final assembly.
coiled pin differential
coiled pin differential
There are many benefits to using a Coiled Spring Pin over other pins in this application. The Coiled Pin can be used in holes with a much wider tolerance than a Solid Pin. This translates to reduced manufacturing costs because the Coiled Pin requires that the hole only be drilled to the recommended hole size versus drilled and reamed.

The Coiled Pins are installed with automatic installation equipment. Since the Coiled Pin does not have any gaps, they cannot nest or interlock which jams the equipment and causes down time. Also, the Coiled Pin requires less insertion force than a Solid Pin; therefore the customer is able to use a smaller cylinder on the installation machine.

The net result is that the customer has chosen the Coiled Pin that provides them with the lowest installed cost assembly.

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.