Sometimes called gap seam bushings, open seam Compression Limiters are manufactured with an “open” or “gap” seam that compresses upon insertion into a smaller diameter hole, much like a roll pin or spring pin. The “spring” action facilitates insertion into the hole while enhancing the retention force of the bushing. Open seam configurations are used primarily in applications where the Limiter is pressed into a hole after molding and readily adapts to automated insertion or vibratory feeding.

Sometimes called “Butt Seam” bushings, closed seam Compression Limiters are typically inserted into a mold or die cavity prior to plastic injection. The fully closed seam configuration prevents the injected plastic material from intruding into the ID of the Limiter. Once the plastic has cooled, the Limiter is permanently molded into the assembly and will not separate from the component housing. Often, Limiters have coined impressions or a radial groove around the OD to create a void area for the molten plastic to grip the Limiter. This improves the axial and/or radial retention strength of the Limiter within the molded part.

While most Compression Limiters are round, our proprietary modular manufacturing process accommodates a variety of net round shapes: Obround, Oblong, Square, and Oval. Our processes accommodate holes, slots, notches, or other cutouts that may be required for your application.

Wisconsin Stamping & Manufacturing has nearly 70 years of experience fabricating Compression Limiters for the demanding applications in virtually every industry. Contact us or request quote for more information about Compression Limiters that may be used for your specific application.