Southtowne Machining - CNC Machinging in St Louis
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In November 2011, Quest Specialty Products, Inc. purchased all of Southtowne Machining, Inc.'s assets and the company came under new ownership.  We are now Quest Specialty Products, Inc. dba Southtowne Machining.  We are pleased to introduce the new owner and President, Dan Fitter.

Please note:
This website is currently under construction and in the process of being updated.


Established in 1984, SMI has grown to become one of the leading machine shops in the St. Louis area. Our growth has been attributed to values that are rare in the fast moving manufacturing industry: quality, courtesy, attention to customer needs, and timely delivery.
Southtowne Machining - building located in St Louis

Our machining capabilities range from small parts utilized by the medical industry, to very large parts for steel mills. This versatility makes us the ideal choice for all your machining needs.
Our Mission

At SMI, our mission is to provide machining services of the highest standard. We follow an ISO quality system and are dedicated to providing excellent customer service, and the timely delivery of quality products. SMI is located in O'Fallon Missouri, approximately 20 miles from St.Louis, Missouri and Lambert International Airport (right off I-40). We have a 30,000 square foot, climate-controlled manufacturing area, drive-in doors, and an overhead crane. Built in 1998, our building was designed to achieve maximum efficiency in modern production and work flow. This efficiency helps us keep our promise to you: to provide excellence not only in service, but in price as well.

Southtowne Machining - CNC Turning Gears
Copyright 2005 Southtowne Machining Inc.

Quest Specialty Products, Inc.
dba Southtowne Machining

808 Corporate Centre Drive
O'Fallon, MO 63368
Ph: 636.447.5521 Fax: 636.447.1599