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Drive studs offer alternative to screws in steel door mounting

12 July 2012

Spirol Industries has provided a leading latch manufacturer with its Drive Studs as an alternative to self-tapping screws for a new assembly. The manufacturer had designed a compartment door latch housing to mate with a mounting plate to hold the latch securely in the door.

The existing design relied on four self-tapping screws to fasten the steel mounting plate to the zinc die-cast latch body.  However, it was recognised that this was not the most effective for mass production. 

After a technical review of the performance requirements, Spirol recommended its Series HP210 Flat Head Helical Knurl Drive Stud.  This would provide maximum pull out resistance and could easily be fed and oriented, facilitating automated assembly with a relatively simple installation machine. 

Spirol's Drive Studs provide an alternative to screws when simplification of an assembly is required for a permanent assembly. The assembly’s host material of die-cast zinc is an ideal match for Spirol's low carbon steel pin. Since this component would not be exposed to significant atmospheric corrosion, Spirol recommended phosphate and rust preventive oil coating as the most cost effective surface treatment for mildly corrosive environments as it offers 72 hours to base metal corrosion.

Spirol also offered the customer a permanent joining method and recommended both the hole depth and hole diameter in order to maximize pin performance and component longevity over the life of the application.  Furthermore, installation is easily automated offering optimum manufacturing efficiency and lowering the total installed cost of the door latch assembly.

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