Efficiency for precision short runs – it’s all in the CNC control

Jim Brey founder of Aztalan Engineering Inc. in front of Okuma cnc machine

Challenge: Aztalan Engineering is a large job shop specializing in precision complex parts that have unique requirements and narrow tolerances. They produce short runs for the medical, aerospace, energy, and defense markets. The decision to use Okumas was based on their need for the best CNC machines and CNC controls to deliver the quality required by their customers. This has proven to be successful and the company continues to grow.

With short run, precision, complex parts, rapid growth can be especially challenging. While ramping up to meet customer demand, Aztalan must continually strike the balance between quality and efficiency. Tools need to be created that allow for lights out operation with no compromises. One of the keys in this process is the implementation of the OSP-P CNC control and MacMan-Net for CNC monitoring.

Real Help: Okuma and distributor Morris Midwest consistently provide customized support, notably connecting all Okuma equipment to MacMan-Net to orchestrate and monitor their automation systems. Today, Aztalan operates at lights out while monitoring efficiency. This is critical to their ability to be competitive.

They’re one of the fastest-growing companies in North America, and are opening a new 46,000 square foot building to make room for growth.

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“We’ve always stuck with Okumas because we need top-of-the-line. Now, the controls are allowing us to integrate automation with machine and tool management software so we can operate at lights out while monitoring the efficiency of the system. It pays to stick with a winner.”

-Jim Brey

Location: Lake Mills, Wisconsin

Equipment: Six Okuma horizontal machining centers, 4 vertical machining centers, an Okuma LFS, 2 twin spindle turning centers and various other machines

Employees: 61



Aztalan President and founder Jim Brey is a super-achiever who leaves other super-achievers in his wake. It’s a characteristic he seems not to notice, but his company and his customers certainly have.

During his career he’s circled the globe, beginning as a young boy milking cows on the family farm in Wisconsin. This is where his down-to-earth qualities were ingrained. A diligent work ethic, gentle humility, smiling affable nature, and his hallmark – relentless pursuer of quality – all took root on the farm.

In the 1940s and 1950s he spent time in the Army and served in the Korean War, where he not only survived (which he attributes to “luck”) but served with honor and distinction, earning two Purple Hearts, several other medals, and a battlefield commission from Staff Sergeant to Second Lieutenant.

Returning from Korea he signed up for the Army Aviation flight school and continued serving on active duty in Europe. Subsequently, while continuing his military service in the Wisconsin Army National Guard, he completed his degree in Mechanical Engineering at the University of Wisconsin. His engineering expertise was honed through nineteen years working in various positions with McDonnell Douglas, AC Delco, and Hamlin Electronics.

Then one day, at the age of 50, he said to his wife Jean, “Let’s do this for ourselves.”

And so the new business was born. Jim knew he wanted something unique for his company name, and settled on Aztalan Engineering, Inc. to reflect his home in Aztalan Township, Wisconsin, and to emphasize the combined offerings of engineering and manufacturing. This set the stage for a uniqueness that would flourish in the 31 years to come.


For the first ten years, Aztalan operated out of a two-car garage on the Brey’s 62-acre farm in Wisconsin. Having saved enough to build a dedicated facility, they moved to a nearby business park in Lake Mills. Ten years later, they built again to double their space.

In 1996 Aztalan landed their big account, with what is now the clinical division of GE Healthcare. They were entrusted with building valves and valve plates for the vaporizers on machines that deliver anesthesia to patients. This is tight-tolerance work, and the process was originally established in Seaton, England. The transfer of the process to Aztalan included delivery of two Okuma LR lathes with robotic arms.

“Our first two Okuma lathes were older machines, and we were impressed with the support we got from the dealership and from Okuma,” recalls Jim. “Even thought the equipment was pretty old, it performed just like it was brand new. Today, after all these years, it’s still performing like new. This is top-of-the-line. It pays to stick with a winner.”

The relationship with Okuma distributor Morris Midwest and the support from Okuma led to the purchase of additional lathes and horizontal machining centers through the years.


As Aztalan established a solid foothold in the medical device industry, they implemented an ongoing crusade to ensure both a consistently high quality product for their customers and a competitive price. The Okumas are an essential ingredient in this winning formula.

“Efficiency is critical to our overall success. That’s why we like the Okuma CNC machines, because we don’t want breakdowns, and we don’t want bad parts,” Jim asserts. “In the last year, we went through a lot of moves from single spindle machines to the twin spindle Okumas, and the efficiencies went way up.”

The single spindle, single action lathes were relatively labor-intensive, with a work-in-process (WIP) flow. They would do half of the part, which would then be put aside while setting up the machine for the other half. Machining capabilities were also limited. The new Okuma LTs, both the 10 and the 200, have C- and Y-axes, allowing the parts to come off complete.

The Aztalan team added several ingenious customizations to streamline and standardize processes. “We put little conveyors on them, and built our own parts catchers,” says Jim. “This allows us to run the machines without needing an operator for loading and unloading. Now we can have one person running two machines, and we do that a lot.” As part of their lean program they’ve meticulously standardized set ups, putting all the tools needed for changeovers in place for quick, repeatable access at each machine.


As business expanded, it became clear that the biggest untapped resource was running lights out. When Okuma introduced MacMan-Net (Machine Management Network) CNC monitoring, the Aztalan team saw a huge opportunity. There was, however, one hurdle to overcome. As an all-Okuma shop, and with the standardization and process efficiency they had accomplished, Jim saw no room for compromise in the CNC controls. Though MacMan-Net was only offered with new equipment at the time, Jim insisted it be installed on every Okuma machine.

According to Jim, “Morris Midwest and the Okuma engineers designed software so that all our Okumas could be hooked up to MacMan-Net. They came in and they actually installed it for us, and managed the implementation so we could get the new systems up and running smoothly. That was a really big deal.”

Today, MacMan-Net is used to integrate automation with machine and tool management personnel on a daily basis, allowing for proactive error identification and troubleshooting. All of this allows Aztalan to run lights out with confidence they can produce complex, short run parts at the quality level their customers have come to expect.


The extreme level of process optimization they’ve achieved gives Aztalan efficiency that makes them competitive on quotes for even the most demanding customers. The CNC machines have filled up fast, and now they’re branching out into other precision parts markets, including aerospace and military. Their manufacturing prowess has enabled them to secure ISO 13485 certification for medical device standards, AS9100 for aerospace, and ISO 9001:2008 registration.

In 2009, Inc. magazine recognized Aztalan as one of North America’s fastest growing companies. With all this growth came a need to implement a major facilities expansion. They are now opening a new 46,000 square foot building to make room for growth.


The Aztalan secret to growth is deceptively simple: focus on quality, with no rejects, and never compromise on-time delivery. In the medical device industry, where they first made their mark, this is more than just a good business decision.

Kirk Kussman, sales and marketing director, reveals a driving force that spurs each employee to follow in Jim’s super-achiever footsteps. “There’s a lot of art and craftsmanship in making high-quality precision parts. But it’s not just that. When we’re putting a part out there, it’s going into an operating room or on the battlefield. People’s lives depend on our parts.”


Kirk envisions continuing down Aztalan’s unique path in the marketplace. “We make really difficult and complex parts. That’s our sweet spot. Some parts that other shops don’t want to take on, we’ll take on.”

The Aztalan team, with 31 years of achievement, has a clear mission and vision. Being known for quality, and delivering that efficiently, is who they are and what their customers want. As growth drives them next into 5 axis machines, the OSP-P CNC control will continue to guide them through process optimization.

“We know our future, and we’re building capacity to get there,” Kirk adds. “We envision a lot of Okuma equipment going into that new building.”


Okuma CNC machines:

2 – Okuma LT-10M

3 – Okuma LT-200MY

2 – Okuma LR-10 with Okuma robots

1 – Okuma LFS

5 – Okuma MA-40HA

1 – Okuma MA-40HA with Fastems FMS system

Partner products used:

Kennametal tooling and JobBoss FASTEMS Flexible Pallet System Edge Barfeeder


This story was written and recorded in 2010. Okuma was sad to learn of the passing of Aztalan founder, Jim Brey, in 2020. It is our hope that this story continues to honor his legacy.

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