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
HomeRequest a quote
Request a quote

Let's build your gears

Tell us what you need and our engineers will get back to you — typically within one business day. Precision open gearing and custom gearboxes up to 160 inches, geared to your specifications.

Have drawings or a physical gear? Note it above — our team will coordinate secure file transfer or drop-off.

How it works

  1. 1

    Send your specs

    Share a print, a sample gear, or a description of what you need. Not sure? We'll help you figure it out.

  2. 2

    We engineer & quote

    Our engineers review requirements, reverse engineer if needed, and return a detailed quote — usually within one business day.

  3. 3

    We build & inspect

    Cut, hardened, and inspected in house to AGMA, ISO, and DIN tolerances, with full documentation.

ISO 9001 registered
Emergency & rush service
Full inspection documentation

Need it fast?

For breakdowns and emergency gear repair, call us directly and we'll get right on it.

630-543-9570
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.