Our History

Keystone Engineering was founded in 1980 after successfully designing the first quick-change drum system for the asphalt milling industry. Since their inception Keystone Engineering has been the leader in the construction industry for outstanding innovation in drum design and has a long standing reputation in excellent quality and customer service.

The Milling Industry’s First Quick-Change Drum Built by Keystone in 1979
The Milling Industry’s First Micro Milling Drum Built by Keystone in 1987

Our Products

All of Keystone Engineering's products are proudly engineered and produced at their Avon, Indiana facility, using the latest design and manufacturing technology that is available. By producing their products in-house it gives Keystone the ability to guarantee a top quality product and the unprecedented ability to react quickly to their customer's needs.


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Industry Associations