the united states' premier polymer extrusion machine shop

Industrial Gearbox Repair & Custom Gear Manufacturing

The Zala Advantage in Single & Twin-Screw Overhauls

Unlike typical repair shops that act as simple assembly houses, Zala Machine Co. operates as a full-scale manufacturing facility. This distinction is especially critical for Industrial Gearbox Repair in NJ, as it essentially allows us to reverse-engineer and manufacture obsolete gears, shafts, and internal components entirely in-house. Furthermore, whether you are operating a high-torque twin-screw system or a specialized single-screw unit, our team provides comprehensive failure analysis, housing bore restoration, and precision gear timing. Ultimately, we don’t just wait for parts; instead, we manufacture the solutions needed to get your facility back to peak production capacity.

service details

Our Comprehensive
5-Step industrial gearbox repair process

To ensure every unit leaves our shop in peak condition, we follow a rigorous, Zala Industrial Gearbox Repair documented restoration process:

1. Industrial Cleaning & External Degreasing

To start, every gearbox undergoes a thorough external cleaning to remove years of production buildup. Doing so allows our technicians to perform a clean disassembly and, consequently, accurately inspect the housing for external cracks or leaks.

2. Precision Disassembly & Documentation

First, we carefully disassemble the unit, while simultaneously documenting the orientation and position of every gear, shaft, and shim. Ultimately, this step is critical for identifying the ‘root cause’ of the failure rather than just treating the symptoms.

3. Comprehensive Inspection & Failure Analysis

Using precision measuring tools, we inspect:

  • Gear Teeth: Checking for pitting, spalling, or micro-cracking.

  • Shafts: Checking for runout, wear at bearing seats, and seal surface integrity.

  • Bores: Checking for ovality or wear in the main housing bores.

4. Component Restoration & In-House Fabrication

Ultimately, this is where the Zala Advantage in Industrial Gearbox Repair sets us apart. Specifically, if a part is unavailable or has a 20-week lead time, we immediately leverage our in-house capabilities to reverse-engineer the worn component. By doing so, we can manufacture the solution ourselves, thereby eliminating delays and getting your operations back online.

  • Gear Manufacturing: We can machine new gear blanks and use our range of gear cutting vendors to cut precision gear teeth.

  • Housing Repair: We utilize our CNC boring mills to sleeve worn bearing seats, restoring perfect shaft alignment.

  • Shaft Recovery: Precision grinding and plating to restore worn seal diameters. Shaft machining has been one of the corner stones of Zala Machine since day one. We fix and machine new shafts for all types of applications.

5. Reassembly, Timing & Tolerance Testing

Once the components are ready, the unit is reassembled with high-grade bearings and seals. Particularly for twin-screw gearboxes, we perform meticulous timing and backlash checks to ensure perfectly synchronized output. As a result, the restored unit meets—and often exceeds—OEM specifications.

Single & Twin-Screw Expertise

We understand the varying complexities of drive systems across the polymer industry:

  • Single-Screw Gearboxes: Focus on thrust bearing integrity and axial load management.

  • Twin-Screw Gearboxes: Specialized alignment and timing for co-rotating or counter-rotating systems.

  • Capacity: We have the lifting capacity and large-scale machinery to handle everything from lab-scale units to massive production gearboxes.

The Zala Industrial Gearbox Repair Advantage: Why We are Different

While most repair shops are just assembly houses—relying on ordering parts and waiting—at Zala, we operate as a complete manufacturing facility. For instance, if your gear is stripped and the OEM is six months out, we simply machine a new one in-house. In this way, we maintain total control over both the quality and the timeline.

Is your production line currently showing signs of heat or vibration? If so, don't wait for a catastrophic failure. Instead, contact us today to schedule an inspection or a full overhaul. By taking this proactive step, you ensure your facility stays online and at peak production capacity.

Infographic of Zala Machine Co.'s industrial twin-screw gearbox repair process, showing disassembly, inspection, gear timing, and full restoration.
A four-panel infographic titled "ZALA IN-HOUSE GEARBOX HOUSING BORE RESTORATION". It details the process of repairing a large industrial gearbox housing, showing steps from "ORIGINAL CONDITION" with worn bores, through "WELD REPAIR" to build up metal, "PRECISION MACHINING" to restore OEM specs, and finally the "FULLY RESTORED" housing ready for reassembly.
Disassembled high-precision helical gears and roller bearings from an industrial extruder gearbox being analyzed for wear and tolerances at Zala Machine Co.
Every component is meticulously cleaned and analyzed to ensure the restored gearbox exceeds OEM performance standards.
A professionally restored and repainted single-screw extruder gearbox at Zala Machine Co. in Hillsborough, NJ, featuring in-house remachined housing and custom gears.
A fully restored single-screw drive unit, overhauled with the Zala Advantage for immediate production reliability.

02. machines

Examples of Gearbox Repair at Zala machine

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call us if you have any questions

04. type of parts

Our CNC Machines enable the precise manufacture of a variety of parts from a variety of materials.

Our advanced CNC machining centers and an experienced team of engineers guarantee excellent results. Regardless of the complexity of the project or specification, we are ready to meet your requirements. Our machines are equipped with the latest technology.

see more photos and videos in our gallery.