Locations

Sunnen Products Company, St. Louis, Missouri, manufactures a wide range of precision bore sizing systems, honing machines, precision bore gages, tooling, abrasives, honing oils and coolants, and accessories. The headquarters facility covers 486,000 sq. ft. (45,150 sq. meters) and has approximately 500 employees.

As the world’s foremost authority on honing, Sunnen has a facility dedicated solely to the research, development and manufacturing of abrasives, plated diamond tooling and honing lubricants.

Sunnen Products Limited, located in Hemel Hempstead, Hertfordshire, England, handles sales, service and distribution for Sunnen in the UK.






Sunnen AG, in Ennetaach-Erlen, Switzerland serves as Sunnen's Technical Center for the European market, and includes space for sales, manufacturing, warehousing and product display. Sunnen AG manufactures Sunnen's HTB, HTH and HTC series of tube hones and specializes in the design and manufacture of automated bore sizing and finishing systems.
Shanghai Sunnen Mechanical Company, Ltd., near Shanghai, China, serves the rapidly expanding Chinese market. This facility includes office and manufacturing space as well as a training facility





Sunnen Italia S.R.L., located in Milan, Italy, supplies the Italian market with honing systems for both the industrial and engine building market.







Sunnen SAS  is located in Saclay France. This facility serves as the sales and support office for France and other European countries.





 Sunnen do Brasil is a new joint venture with its long-time Brasil distributor, Hontech Ltda.  Sunnen do Brasil, in Sao Bernardo do Campo SP, manufactures abrasives locally and serves Sunnen's extensive Brasil customer base.  
Sunnen RUS is the subsidiary for Russia (www.sunnen.ru) and Sunnen S.R.O. is the subsidiary for the Czech Republic (www.sunnen.cz).



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