Gear Force Machine
Rebuilt extruder barrels and screws on a flatbed trailer at Gear Force Machine, ready for a plastics manufacturer.
Plastics & Rubber · Nationwide · 24/7

A worn screw or a down extruder gearbox stops the whole line.

Single- and twin-screw extruders, screws, barrels, and drive gearboxes for compounding, film, and profile lines — rebuilt to spec in-house and back on the floor before a scrapped run turns into a scrapped week.

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Gear Force Machine repairs and rebuilds Sigma / double-arm mixers and single- and twin-screw extruders for plastics and rubber manufacturers — mixer blades and troughs, extruder screws and barrels, and drive gearboxes, all rebuilt in-house. We rebuild Sigma and double-arm dispersion mixer blades and troughs, hardface and re-chrome worn extruder screws, re-line and re-bore barrels, and tear down and rebuild drive gearboxes to OEM tolerances. When the OEM is gone, we reverse-engineer obsolete mixer blades and screws from the worn part and machine the replacement in-house.

A rebuilt mixer blade, screw, or barrel typically runs a fraction of the cost of a new one and ships far faster than an OEM lead time, so a worn element rarely justifies replacing the whole assembly. Every job ships with a written condition report, line-item pricing, free nationwide pickup, and a 12-month warranty on mixer and screw work. Line down right now? Call 832-729-9906.

A rebuilt blue Sigma double-arm mixer at the Gear Force Machine shop.
Equipment We Service

The mixers and extruders we keep running on the line.

Sigma mixers and continuous-duty extrusion equipment across compounding, film, sheet, and profile lines — the parts where wear quietly kills output and quality before it stops the line entirely.

  • Single-screw extruders
  • Co- & counter-rotating twin-screw extruders
  • Sigma / double-arm dispersion mixers
  • Extruder drive gearboxes
  • Extruder screws (hardfacing & re-chrome)
  • Mixer blade & trough rebuild
  • Pelletizer & gear-pump drives
  • Obsolete NRM / Egan / Prodex / Berstorff units
How We Help

How we keep the line extruding.

Extruder Repair

Screws hardfaced and re-chromed and barrels re-lined and re-bored — matched as a set for clearance and output.

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Mixer Repair

Sigma and double-arm dispersion mixer blades and troughs rebuilt to restore mixing action and running clearance.

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Gearbox Repair

Complete teardown, inspection, and OEM-spec rebuild of mixer and extruder drive gearboxes, with in-house gear cutting for obsolete units.

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Frequently Asked

Questions from this industry.

Yes. We rebuild Sigma and double-arm dispersion mixers — blades and troughs — alongside single-screw and co- and counter-rotating twin-screw extruders, including screws, barrels, and drive gearboxes, for compounding, film, sheet, and profile lines.

Whenever possible, yes. Screw flight and barrel bore wear together, so we measure both and restore the running clearance as a set — hardfacing or re-chroming the screw and re-lining or re-boring the barrel — to bring output, pressure, and melt quality back to spec.

Constantly. We reverse-engineer obsolete screws from brands like NRM, Egan, Prodex, and Berstorff directly from the worn element and machine the replacement in-house, so a discontinued design never forces a new-machine purchase.

A down line gets prioritized — 24/7 intake and same-day start when possible. Most screw, barrel, and gearbox rebuilds ship in one to four weeks depending on size, condition, and parts. Call 832-729-9906 and we will give you an honest timeline.

We machine and reassemble to OEM tolerances, holding critical dimensions to within ± 0.001" where the application demands it. Screw work carries a 12-month warranty covering workmanship and replaced components under normal operating conditions; gearbox rebuilds carry a longer term.
When You Need Us

Emergency or planned — we're ready when you call.

Pick up the phone for a technician dispatch. Submit a request for a detailed quote. Either way, you'll hear back within the hour.

Call 832-729-9906Request Service

24/7 Nationwide · ISO 9001:2015 · AGMA & AGC Member