Automotive Specialty Vacuum Fitting

Most plastics are not able to handle the stresses imparted by the tightening torque of machine cap screws. For these types of applications, SPIROL has developed a comprehensive line of Compression Limiters. The Compression Limiters are able to withstand the torque loads and prevent excessive compression of the plastic host. In plastics, such as this, that can only withstand limited stress, SPIROL recommends the use of Brass Series CL800 Compression Limiters installed with a Model HP Pneumatic Heat Insert Driver. The heat installation causes the plastic material to melt and flow into the retention features on the Limiter which positively prevents it from falling out, and eliminates most internal stresses in the host. To install the Limiters, the operator simply places the molded part and the Compression Limiter on a two-stepped spring loaded alignment pin, and activates the machine. The heated tip advances, engages the Compression Limiter, heats and installs it to the proper depth, and then withdraws. The completed assembly is automatically ejected and the process repeated.

The use of SPIROL's Series CL800 Compression Limiter eliminated the issue with the cracking plastic assemblies. The Model HP Heat Insert Driver was extremely easy to use and provided a consistent quality end product.