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Olson Aluminum Castings

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United States
Rockford, IL
Olson Aluminum Castings

Industry leading high quality pressure tight and leak free aluminum castings since 1945

11/05/2026

Our newest (and youngest) foundry visitor came fully suited up: hard hat, safety glasses, and plenty of questions.

Jackie Thompson, our Finance Controller, celebrated her birthday at the office, and her nephew joined her for the day. Tad walked him down the mold line and showed him how molten aluminum becomes the castings we’ve been making in Rockford since 1945.

Showing the next generation how American manufacturing gets done is something we’re proud of. We hope this tour planted the seed for a future engineer.

10/22/2026

Today, Olson Aluminum Castings paused to celebrate a milestone that belongs to all of us. 🎉

Sky Bracket — our mounting hardware division — turns 40 this year. What Ray Olson started in 1986 as a solution for a contractor friend has grown into a nationally recognized product line trusted across the traffic infrastructure industry.

We marked the occasion the right way — an Oktoberfest luncheon with the full OAC and Sky Bracket family. Bratwurst, pork chops, and the people who make it all possible.

Proud to share this milestone with our team. Congratulations, Sky Bracket. 🇺🇸

WeHaveTheBestCustomers AmericanMade FamilyOwned Rockford FoundryFamily MadeInUSA

10/15/2026

Five years goes fast when you love what you do. 🎉

Today we celebrated Tom Smith's 5-year anniversary at Olson Aluminum Castings. As a Maintenance Technician, Tom is one of the unsung heroes of this foundry — the person who keeps everything running on all cylinders, day in and day out. When something breaks or needs attention, Tom is the one who makes it right.

Foundries don't run without people like Tom, and we don't take that for granted.

When he's not keeping OAC humming, Tom is out on the water boat racing or spending time with his grandson Kaden. We're grateful for every one of those five years, Tom — and we're glad you're part of this family.

Congratulations. Here's to many more. 🤝

10/09/2026

This is what full capacity looks like at Olson Aluminum Castings. 🔥

Row after row of green sand molds, poured and cooling on the line. Steam rising. The team moving. Every mold on its way to becoming a pressure-tight, leak-free aluminum casting bound for a customer who needs it.

This is what 80 years of foundry discipline produces — not just the ability to run, but the ability to run right. Consistent mold quality, consistent metal chemistry, and industry-leading turnaround times. Every time, regardless of the business cycle.

If you're looking for a foundry partner who can keep up with your demand — we're already running. Let's talk.

🔗 olsonalum.com

09/29/2026

Small. Large. Intricate. Simple. We cast them all. 🔩

At Olson Aluminum Castings, our air-set line handles the full spectrum of casting complexity. Palm-sized parts loaded with cores and tight geometry. And castings so large they take two hands to lift — with just as much internal complexity, 100% pressure tight, 100% leak free.

We've had customers tell us the same thing for decades: "They machine like billet."

That's not an accident. It's the result of 80 years of foundry discipline — conservative gating design, consistent degassing, and a team that treats every pour like the customer is watching.

If your current foundry is telling you the part can't be done, give us a call. We've heard that before.

🔗 olsonalum.com

09/17/2026

¡Feliz Día de la Independencia! 🇲🇽

We celebrated Mexican Independence Day with a big part of what makes this foundry great — our people.

A large portion of our team has Mexican heritage, and many were born in Mexico. They come to work every day and pour their best into everything we do here. So we took the time to celebrate with them, the way family does.

Food, drinks, a few laughs, and a president in a poncho. That's The Olson Way.

To every member of our team who calls Mexico home or carries that heritage with you — thank you for being part of this family. We're better because you're here.

09/15/2026

This is what casting capability actually looks like. 🔥

Our air-set molding line at Olson Aluminum Castings handles the complex, large, and demanding castings that green sand alone can’t touch. Intricate impellers. Valve bodies. Housings. Parts that require deeper draws, more complex geometry, and tighter tolerances.

One foundry. Two proven processes. Green sand for high-volume production. Air-set for when the part demands more.

80 years of aluminum casting experience, and we’re still expanding what’s possible. If you need a foundry partner who can handle the part your current supplier said couldn’t be done — let’s talk.

🔗 olsonalum.com

09/15/2026

This is what casting capability actually looks like. 🔥

Our air-set molding line at Olson Aluminum Castings handles the complex, large, and demanding castings that green sand alone can't touch. Intricate impellers. Valve bodies. Housings. Parts that require deeper draws, more complex geometry, and tighter tolerances.

One foundry. Two proven processes. Green sand for high-volume production. Air-set for when the part demands more.

80 years of aluminum casting experience, and we're still expanding what's possible. If you need a foundry partner who can handle the part your current supplier said couldn't be done — let's talk.

🔗 olsonalum.com

08/28/2026

This summer, Rowan and Jackson didn't just observe — they contributed. 🎓

Our 2026 Summer Internship Program at Olson Aluminum Castings challenged both interns to take full ownership of real projects with real impact. From hands-on time on the foundry floor to standing in front of leadership and presenting their findings, these two earned every bit of what they accomplished.

Rowan led a project focused on degassing process improvements — analyzing current practices, identifying opportunities, and presenting data-backed recommendations to the team.

Jackson took on process sheets and furnace allocation, developing uniform board standards built around operator input and designed to give the foundry floor one clear signal at every station.

Both interns presented their work to OAC leadership in a formal capstone session — and the room was impressed.

We believe the foundry industry's future depends on structured, intentional talent development. Our internship program is built on that belief. We're proud of what Rowan and Jackson built this summer, and we're grateful they chose to build it here.

Congratulations to both of you. You set the bar high. 🤝

08/07/2026

Olson Aluminum Castings is expanding our in-house heat treating system. 🔥

100% of our A356 aluminum castings are heat treated right here in our facility — and as our business grows, so must our capacity.

Heat treatment is one of the few inherently slow processes in sand casting production. Raw castings sit in a pit furnace at nearly 1,000°F for 10 hours, then are immediately quenched in hot water. From there, they go through an artificial aging cycle at approximately 350°F for 3 hours to complete the T6 heat treatment process.

To meet growing demand, Olson Aluminum designed both pit furnaces and the quench tank in-house — expanding our heat treat capacity by 50%. We’ve also added a second aging oven: a brand new Precision Quincy custom age oven built to OAC specifications, manufactured just down the road in South Beloit, IL.

The new oven handles two pit furnace heat treatment baskets per cycle. They roll in on a custom Precision Quincy cart riding on junior railroad rails — cast flush into the new concrete floor.

Every detail, engineered to Olson standards. That’s how we do things here. 🇺🇸

🔗 olsonalum.com

Address

2135 15th Street PO Box 6106
Rockford, IL
61104

Opening Hours

Monday	7am - 5pm
Tuesday	7am - 5pm
Wednesday	7am - 5pm
Thursday	7am - 5pm
Friday	7am - 5pm

Website

http://www.OlsonAlum.com/

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