Threaded studs, mounting plates, stainless bushings, and structural cores — positioned in the mold before the pour. The urethane forms around them, producing a single-piece assembly that outperforms any adhesive bond.
An adhesive joint is only as strong as the weakest of three things: the substrate, the adhesive, or the surface prep. A molded-in insert eliminates the adhesive entirely. The urethane flows into knurls, grooves, and undercuts on the insert, then cures around them — creating a mechanical lock that's typically stronger than the surrounding urethane itself. The failure mode changes from "bond separation" to "urethane tear," which is a much more graceful way to fail.
Zinc-plated or stainless. Sizes from #6-32 through 3/8-16 routinely molded in.
Stamped steel or aluminum plates with knurled perimeters for full-perimeter mechanical lock.
Steel, brass, or stainless bushings for precision-bore features that urethane alone cannot hold.
Full machined-metal cores with the urethane as an outer layer — for stiff parts that also need the feel of urethane.
Insert molding doesn't mean a plain foam surface. Any of our insert-molded parts can be specified with an integral skin for a durable, cleanable outer surface — plus textured grain or color-matched finish molded directly in. The result is a single assembly that comes out of the mold finished, fastened, and ready to ship. No secondary coating, no upholstery, no bonding step. The maintenance-free molded surface holds up to industrial and commercial use cycles without replacement.
Send us both parts. We'll design the insert interface and quote the combined assembly.
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