With eight state-of-the-art, fully automatic CNC grinders and eight supporting manual grinding machines, Cowan Precision Grinding is fully equipped to get your job done right the first time. Over the last fifty years, we’ve ground prototype and one-off parts for a wide variety of industries and applications, working closely with our customers’ engineers and manufacturing managers. But Cowan is perhaps best known for grinding and delivering very large quantities of parts, numbering from hundreds to thousands. This level of production requires careful planning, a thorough understanding of the grinding process, and flawless execution. At Cowan, we are experts in production grinding - including magnetic rotor grinding - and we know what it takes to get the job done and deliver on time.

In today’s challenging manufacturing environment there is zero tolerance for failure. We understand that our performance affects your performance, and nobody can afford to be second best. We can grind outside diameters up to 12.0” x 42.0” long; and inside diameters from .375” to 12.0” and up to 8.0” deep. Whether you need one part or a thousand, Cowan has the experience and the grinding capacity to deliver on time, every time. You can count on the grinding professionals at Cowan Precision Grinding.

Tapered diameters are one of the more challenging jobs in the world of precision grinding. Many would say that it is more of an art than a science, and most would agree that it takes years of experience and state-of-the-art equipment to do it right. Cowan has been grinding both O.D. and I.D. tapers on a variety of materials and configurations for more than five decades; and we have the equipment – both CNC and manual – and the hands-on experience to get the job done right the first time.

“With standard diameter tolerance requirements of .0001”, linear tolerances of .0002” and concentricity less than .00005” (fifty-millionths of an inch), you’d better know what you’re doing when grinding tapers,” says Phil Cowan, “there really is no margin for error.” At Cowan Precision Grinding we use the most modern equipment and a sophisticated air-gage system to grind and inspect our work to guarantee strict compliance with your drawing requirements. Dozens of precision manufacturers, both large and small, trust their taper grinding jobs to Cowan Precision Grinding because they know they’ll get their parts done right and delivered on time. Call us for your next taper grinding requirement and let us perform for you.

Over the years, Cowan Precision Grinding has built a reputation as the “go-to guys" for the more difficult and challenging grinding jobs. While we can grind just about anything that can fit in our machines, close tolerances, and complex configurations are where we really shine - including magnetic rotor grinding. Whether its difficult materials like 304 stainless steel, Inconel, or Titanium; multiple diameters with extremely close concentricity and linear requirements; diameters and roundness within ±.00005” (fifty-millionths of an inch); or thin-wall and other parts requiring special tooling; Cowan gets it done right the first time.

We combine the most modern CNC equipment available with decades of grinding knowledge and expertise to offer our customers a cost-effective solution for their most demanding grinding jobs. So, the next time someone tells you “it can’t be done”, bring your job to Cowan Precision Grinding and watch us go to work. You’ll be amazed at what we can do.

In 1971, you could fill up your gas tank for less than five bucks, Intel released the world’s first microprocessor, and Phil Cowan started grinding parts. In the five decades since that time, Phil and his team at Cowan Precision Grinding have gained a wealth of hands-on precision grinding knowledge and experience. We’ve ground parts in a variety of materials and configurations for a wide range of industries and applications, and our customers have come to rely on our knowledge and expertise.

When you’re manufacturing parts that require precision grinding, proper planning and preparation can make all the difference. That is why our customers call the experts at Cowan Precision Grinding for advice and information on everything from stock removal to heat treat distortion. They know that our years of precision grinding experience will save them time and money when it comes to preparing parts for grinding. And best of all, our advice is free. So, the next time you have a job that requires precision grinding, save yourself some time and money. Call Phil at (818) 361-3512 or send your questions to phil@cowangrinding.com and put fifty years of grinding expertise to work for you.