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ISO 9001 Registered630-543-9570 sales@oc-gear.com

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HomeIndustriesOil & Gas

Process Drives

Oil & Gas

Pump, compressor, and mud-pump gearing engineered for continuous upstream and downstream service.

Built for oil & gas

Oil and gas operations run continuously in remote and hazardous settings where downtime is measured in millions. We manufacture pump, compressor, and process-drive gearing and complete gearboxes engineered for high load, continuous duty, and the documented reliability that keeps critical process equipment online.

Challenges we solve

Continuous duty in remote, demanding locations
High-load pump and compressor drives
Obsolete-unit duplication and fast replacement
Documented quality for critical process service

By the numbers

24/7: Continuous duty
Build: To print or sample
Fast: Turnaround

Recommended gearing

Spur Gears
Custom Gearboxes
Repair & Reverse Engineering

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Other industries we serve

Fracturing

Mining

Marine

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Let's build the gearing your equipment depends on.

Send us a print, a sample, or a set of requirements. Our engineers will help you spec the right gearing and get precision parts back to you fast.

A full-service manufacturer of precision open gearing and custom gearboxes since 1888. A founding member of AGMA, made in Addison, Illinois.

630-543-9570 sales@oc-gear.com

530 Westgate Drive, Addison, IL 60101

Gearing

Spur Gears
Helical & Double Helical
Bevel Gears
Worm Gears
Custom Gearboxes
Repair & Reverse Engineering

Company

About Us
Gearing
Capabilities
Industries
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Capabilities

5-Axis Gear Milling
Carburizing & Press Quenching
Gear Metrology Lab
Contract Machining
Reverse Engineering

© 2026 Overton Chicago Gear. Part of the Precision Products Machining Group.

ISO 9001 RegisteredAGMA Founding Member · Est. 1888

Carved byChisel&Co.