About The Gearbox Guy

Fixing complex problems - done right, from the root

Experience & Focus

With decades of hands-on experience, we specialize in the repair of twin screw extruder gearboxes—one of the most demanding types of gear systems in the industry.

The Gearbox Guy is a specialized service operating under Plastic Machinery Sales LLC, bringing that experience into a focused approach to gearbox repair and related services.

While we also service single screw extruder gearboxes, our primary focus is on twin screw systems. The level of precision and complexity involved in twin screw repair naturally carries over—so when you bring us a single screw gearbox, you're getting that same high standard of workmanship.

Why Twin Screw Is Different

Twin screw gearboxes are very different from standard gear systems. They run under high loads, require precise timing between shafts, and depend on tight tolerances to perform correctly.

Because of that, they can't be treated like a typical repair job. Small details matter—and when they're missed, problems come back.

That's where we stand apart.

What We See in the Field

Over the years, we've seen many gearboxes come in after previous repairs where the root issue was not fully addressed—temporary fixes, incorrect assembly practices, or critical details being overlooked.

Those kinds of repairs may get a machine running for a short time, but they don't last.

If you'd like to see real examples of the kinds of issues we encounter—and how they're properly addressed—take a look at our gallery.

Our Approach

Our approach is different.

Every gearbox is carefully inspected, diagnosed, and repaired with attention to the details that are often overlooked. No guesswork, no shortcuts, and no patchwork—just a focus on finding the real root of the problem and fixing it at the source.

How We Work

This is a one-owner operation, which means every job is handled start to finish by the same person. That brings consistency, accountability, and quality control throughout the entire process.

Lead times are always fair and realistic, with the priority being long-lasting results—not rushed work.

Built on Trust

Over the years, many customers have come to us after working with other repair shops where the issue was not fully resolved. That's why most of our work today comes from repeat customers and word of mouth.

All repairs are backed by a one-year warranty for added confidence.

Additional Services

In addition to gearbox repair, we also offer:

• Barrels and screws services
• Equipment inventory, including sourcing and selling quality used gearboxes and parts

If you're looking for a hard-to-find gearbox or component, feel free to reach out—we may be able to help.

Get in Touch

For other services or questions, contact us by phone, text, or email.