Gregstrom Corporation

Gregstrom Corporation Gregstrom Corporation is a Made in USA rotational molder with over 75 years of plastics manufacturing experience. Here at our 60,000 sq. ft.

For nearly 70 years, Gregstrom Corporation has been building lasting relationships with partners in industries like yours. As a third-generation, family-owned business, our American-owned company stakes its reputation on a commitment to quality, customer service, and continuous improvement. facility in Woburn, Massachusetts, we take pride in adding value to your projects. Custom Thermoformer and R

otomolder

As a custom thermoformer and rotational molder, Gregstrom Corporation offers an array of specialized services and value-added options that are unmatched in the plastics industry. So whether you need rotomolded or thermoformed parts and assemblies in low, medium, or high-volume quantities, we’re ready to provide design assistance and tooling services that ensure quality and consistency. Rotomolding and Thermoforming Plus Assembly and Testing

In addition to custom rotomolding and heavy gauge thermoforming, Gregstrom Corporation offers routing, welding, finishing, full assembly and testing services, project management, packaging, inventory management and shipping. Our financial stability means that you can count us on us to manage your finished goods inventory, and to send reliable releases for long-term blanket orders. Award-Winning Rotomolder and Thermoformer

Since 1946, Gregstrom Corporation has been a partner that companies like yours have counted on. Over the years, we’ve been honored with customer awards for quality and service. We’ve also received industry awards from the Society of the Association of Rotational Molders (ARM), Society of Plastics Engineers (SPE), Society of the Plastics Industry (SPI), and Thermoforming Institute (TI). Let’s Get Started

Let us make your next project an award-winning performance. To learn how our capabilities can support your application, contact Gregstrom Corporation online or call (781) 935-6600.

Wall thickness isn’t just a dimension in rotomolding. It's a performance driver. Uniform walls improve cooling, reduce ...
06/12/2026

Wall thickness isn’t just a dimension in rotomolding. It's a performance driver. Uniform walls improve cooling, reduce stress, and prevent warpage. https://bit.ly/4o7cmWU

Wall thickness defines a plastic part's basic shape, but that's not all. Learn why wall thickness matters to your design & why rotational molding is better.

Does the cooler deliver real ice retention or just look the part? Uniform walls, proper radii, molded‑in features, and s...
06/10/2026

Does the cooler deliver real ice retention or just look the part? Uniform walls, proper radii, molded‑in features, and smart insulation strategy were just some of what made this project a success. https://bit.ly/4dI6GiA

Beer coolers can do more than keep beverages ice cold. They can also function as point-of-purchase (POP) displays that capture consumer attention.

Good rotomolded parts are engineered from the first sketch. Wall thickness control, proper radii, uniform cooling, and s...
06/08/2026

Good rotomolded parts are engineered from the first sketch. Wall thickness control, proper radii, uniform cooling, and smart structural features all determine whether a part molds cleanly. https://bit.ly/4vlrPF3

Rotational molding design involves these five tips: wall thickness, draft angles, ribs and bosses, corners and edges, and undercuts.

Molded‑in inserts give rotomolded parts reliable attachment points without stressing the plastic. Proper insert geometry...
06/04/2026

Molded‑in inserts give rotomolded parts reliable attachment points without stressing the plastic. Proper insert geometry, heat conduction, and material compatibility ensure full fusion, prevent stress cracking, and keep hardware connections strong for the life of the part. https://bit.ly/3S47gML

Rotational molding can use molded-in inserts that support the use of hardware such as hinges, fasteners, and handles for strong, lightweight plastic parts.

Kiss‑offs are one of the most effective ways to stiffen rotomolded parts. They don’t just add rigidity. They transfer lo...
06/02/2026

Kiss‑offs are one of the most effective ways to stiffen rotomolded parts. They don’t just add rigidity. They transfer load, control panel deflection, and reduce warpage during cooling. https://bit.ly/4eelwNN

A kiss-off in rotational molding is a solid, reinforcing structure that transmits a load from one nominal wall to another.

Wall thickness defines the basic shape of a rotomolded part. It might be the most important design decision that you mak...
05/28/2026

Wall thickness defines the basic shape of a rotomolded part. It might be the most important design decision that you make. Here's what else you need to know. https://bit.ly/3WVjG9i

Rotational molding is great for strong, hollow parts like plastic mufflers. It also has lower tooling costs and faster t...
05/26/2026

Rotational molding is great for strong, hollow parts like plastic mufflers. It also has lower tooling costs and faster tooling times than injection molding. https://bit.ly/3yiGCnU

Compared to some metal fabrication processes, rotational molding can speed cycle times and reduce production costs. Plus...
05/22/2026

Compared to some metal fabrication processes, rotational molding can speed cycle times and reduce production costs. Plus, rotomolded products weigh less. https://bit.ly/3yiGCnU

This chemical feeder includes six rotomolded parts. Gregstrom molded them all and purchased, tested, and assembled all o...
05/20/2026

This chemical feeder includes six rotomolded parts. Gregstrom molded them all and purchased, tested, and assembled all of the other components. It's a great example of our value-added rotational molding. https://bit.ly/3E16I2N

Injection molding isn't the only plastics process for medical devices and equipment. Rotational molding can create plast...
05/18/2026

Injection molding isn't the only plastics process for medical devices and equipment. Rotational molding can create plastic parts in high or low volumes, and the tooling costs are a lot less. https://bit.ly/3y6TFZK

Address

10 Iron Horse Drive, Unit C
Bedford, NH
03110

Opening Hours

Monday 8am - 5:30pm
Tuesday 8am - 5:30pm
Wednesday 8am - 5:30pm
Thursday 8am - 5:30pm
Friday 8am - 5:30pm

Telephone

+17819356600

Website

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