A member of the Precision Products family of companies
ISO 9001 Registered630-543-9570sales@oc-gear.com
Overton Chicago Gear
Gearing
Industries
CapabilitiesAboutContact
630-543-9570
HomeIndustries
Industries

OCG solutions for diverse industries

OCG delivers high-performance, high-precision open gearing and gearboxes for industries as diverse as fracking, mining, defense, and medical devices. No matter how special the application, OCG can deliver — with 135+ years of know-how, top-tier talent, and state-of-the-art manufacturing and quality systems.

Oil & GasProcess Drives

Oil & Gas

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

Explore this industry
FracturingFrac Pumps

Fracturing

High-strength gearing for frac pumps and pressure-pumping fleets that endure extreme, repeated shock loads.

Explore this industry
MiningHeavy Drives

Mining

Bevel, spur, and girth gearing for cone crushers, mills, shovels, and earth-moving equipment.

Explore this industry
MarinePropulsion

Marine

Propulsion, winch, and deck-machinery gearing built to marine standards for reliability far from shore.

Explore this industry
Wind EnergyTurbine Gearing

Wind Energy

Precision gearing and gearbox components for wind turbine drivetrains and yaw-and-pitch systems.

Explore this industry
Cement ProcessingKiln & Mill Drives

Cement Processing

Girth gears, pinions, and kiln drives for cement plants that run around the clock in abrasive conditions.

Explore this industry
LocomotionRail Drives

Locomotion

Traction and drive gearing for locomotives and rail equipment built for high-mileage reliability.

Explore this industry
Metal ProcessingRolling Mills

Metal Processing

Pinion stands, drive gears, and gearboxes for rolling mills and metal-processing lines under constant heat and tonnage.

Explore this industry
DefenseMission Critical

Defense

Mission-critical gearing for defense platforms, held to the tightest tolerances and full traceability.

Explore this industry
MedicalPrecision Devices

Medical

Small-module precision gearing for medical imaging and diagnostic equipment where accuracy is everything.

Explore this industry
Paper & PulpMill Drives

Paper & Pulp

Roller, dryer, and drive gearing for paper and pulp mills running continuously at high tonnage.

Explore this industry
Power GenerationTurbine Drives

Power Generation

Turbine, generator, and auxiliary drive gearing engineered for smooth, quiet, high-reliability operation.

Explore this industry
Not sure where you fit?

If it turns, we can gear it.

From a single emergency replacement to a complete engineered drive, tell us about your application and we'll help you spec the right solution.

Overton Chicago Gear

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

630-543-9570sales@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
  • Request a Quote
  • Contact

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.