Extension Springs

Extension springs are manufactured with virtually any type of loop or specialty ends. Automatic coiling and looping equipment eliminates the cost and delay of secondary handling of production runs. Quality is further enhanced by electronic inspection at the machine with 100% reliability.

Wire Size:

.010 to .135


Full cross loops, side loops,
double twisted full loops,
rectangular, teardrop


Extension Springs

Dudek & Bock has over 60 years of spring expertise to put to work for you. Our experience means we can quickly and expertly design virtually any type of custom spring you need. Contact us for a quote on your project.

What’s more, our state-of-the-art production equipment means we’re prepared to produce everything from pilot lots to million+ piece production runs. Whether you need springs in round, square or rectangular wire shapes, in virtually any diameter or size, Dudek and Bock has the expertise to engineer and produce your spring with the quality, cost and lead time you want.


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