When Frank Cowan started Cowan Precision Grinding in 1968 in Burbank, California, he had a 1956 Cincinnati Universal Grinder and a plan to offer the best possible precision grinding service to the burgeoning Southern California aerospace industry. From these humble beginnings, the company has grown into one of Southern California’s top sources for precision grinding. Today, more then forty years later, Cowan Precision Grinding offers extremely close-tolerance O.D. and I.D. grinding; plus O.D. and I.D. taper grinding, O.D. profile grinding, diamond-roll form grinding and hard-chrome grinding per BAC 5032.

In 1980 when Phil Cowan took over the business, he already had a decade of precision grinding experience under his belt. Phil met the challenges and steadily grew the business, acquiring the company’s first Mitsubishi CNC grinder in 1995. From that point on, Cowan Precision Grinding has pursued the perfect combination of advanced technology and old-fashioned craftsmanship. The result is a level of quality and reliability rarely seen in the precision manufacturing industry today. “When you’re working on a job with thousands of dollars in material and labor already invested,” explains Phil, “you’d better know exactly what you’re doing. If you don’t, you’re out of business in a hurry.”

Cowan Precision Grinding, Incorporated - About Us

Today, Phil Cowan, Jr. is following in his father’s footsteps, learning and perfecting the craft of precision grinding from the ground up. With more than sixteen years under his belt, Phil Jr. is carrying on the Cowan family tradition of quality and craftsmanship began by his grandfather over four decades ago. With seven state-of-the-art CNC and nine manual grinding machines, and a team of seasoned professionals with years of hands-on grinding expertise, we can grind outside diameters up to 12.0” and up to 42.0” in length, and inside diameters from .375” to 12.0”, and up to 8.0” deep with absolute precision and accuracy.

Over the last forty years Cowan Precision Grinding has earned its reputation for excellence and dependability. That is why dozens of local precision manufacturers, as well as many world-wide high-tech firms, trust Cowan Precision Grinding with their precision grinding requirements. When it comes to precision I.D. and O.D. grinding, there isn’t much that Cowan can’t do. As Phil likes to say, “If it can fit in our machines, we can grind it.”

Find out why Cowan Precision Grinding is the first choice for manufacturers both large and small. Call us today at (818) 361-3512 or email us at mail@cowanprecisiongrinding.com and let us show you what we can do.




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