Stewart Manufacturing, LLC provides quality computerized numerical controlled (CNC) machining services to a wide range of customers in the automotive, agriculture, mining, diesel engine, heavy equipment and power generating industries. We are ISO 9001:2008 and ISO/TS16949:2009 certified.

01. Our Mission

Stewart Manufacturing, LLC shall provide high quality, cost effective products in response to the needs of our customers. All personnel shall collectively focus their efforts on total quality and the continuous improvement of manufacturing operations.

Stewart Manufacturing, LLC shall be a progressive and innovative manufacturer and marketer, which is readily able to respond to a changing market place.

We shall be recognized by our customers and our community for excellence and integrity as an organization.

02. Quality Policy

It is the policy of Stewart Manufacturing, LLC, to ensure that the quality of our products purchased by, produced by, and shipped by our company’s employees, meet or exceed the highest standards set forth in our industry. That we shall continually strive to increase and improve upon these standards so as to set us apart from our competitors and identify us as the leader in the area of quality, delivery, technology and social responsibility.

This quality policy shall be communicated to every employee, including management. They are expected to understand the purpose of the quality management system and work towards our quality commitment. Success requires satisfied customers. This quality assurance system reflects the company’s total commitment to achieving the goal of meeting the needs of our customers in a cost effective, safe and efficient manner.



  • Purchased the assets to P-S Manufacturing in Spalding, MI
  • 8 employees
  • Primary business was a job shop for low volume regional customers
  • By the end of 2003, there were 25 employees and $2.4 million in sales.



  • 90 employees
  • $8.1 million in sales
  • Purchased and moved business to a vacant 77,000 square foot facility in Hermansville, Michigan where business continued to grow


  • ISO 9001:2008 certified
  • $8.7 million in sales



  • $10.3 million in sales


  • $16.5 million in sales


  • Purchased assets American Instrument & Implant in Manton, MI.



  • $21 million in sales


  • Moved American Instrument & Implant to Hermansville, MI.
  • Completed 21K sq/ft expansion


  • $23 million in sales
  • 117 employees


  • TS/ISO 9001:2009 certified
  • Maintenance building expansion 5,000 sq/ft.