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Overton Chicago Gear
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High-Load

Helical & Double Helical

Single, double helical, and herringbone gears for smooth, quiet, high-load meshing in demanding drivetrains.

Helical & Double Helical
Configurations
Single / double / herringbone
Helix
RH & LH
Accuracy
To AGMA 11
Inspection
CMM verified
Overview

The angled teeth of helical gears engage gradually, delivering smoother, quieter operation and higher load capacity than spur gears. We manufacture single helical, double helical, and herringbone gears — including large-diameter sets — with the tight lead and profile control that heavy drivetrains require.

Key features

  • Single helical, double helical, and herringbone configurations
  • Right- and left-hand helix angles to your specification
  • Large-diameter capability with tight lead and profile control
  • Cut, heat treated, and inspected under one roof
  • Matched sets and replacements built to print

Typical applications

Marine propulsionTurbine drivesExtruder gearboxesRolling mills
More gearing
Spur Gears

Spur Gears

Precision straight-tooth spur gears cut to AGMA 11 in diameters up to 160 inches — the workhorse of heavy power transmission.

Bevel Gears

Bevel Gears

Spiral, straight, and skew bevel gears for reliable right-angle and intersecting-shaft power transmission.

Worm Gears

Worm Gears

Worm and worm-wheel sets for high reduction ratios, compact drives, and self-locking motion control.

Get started

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.

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
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  • 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.