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ISO 9001 Registered630-543-9570sales@oc-gear.com
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Up to 160"

Spur Gears

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

Spur Gears
Max Diameter
160 inches
Accuracy
To AGMA 11
Type
External / internal
Heat Treat
In-house
Overview

Spur gears are the foundation of industrial power transmission, and few shops can cut them at our scale or accuracy. Our 5-axis milling and dedicated gear-cutting equipment produce external and internal spur gears in diameters up to 160 inches, held to AGMA 11 quality without the need for grinding on our Höfler 2400.

Key features

  • External and internal spur gears up to 160" diameter
  • AGMA 11 accuracy cut on our Höfler 2400 — no grinding required
  • Cut from your material or ours, fully heat treated in house
  • Coarse and fine pitch, single or batch quantities
  • Reverse-engineered from a sample when no print exists

Typical applications

Mill drivesKilns & dryersHeavy conveyorsPower transmission
Compare specs

How spur gears stack up

Toggle gear types to compare geometry, efficiency, and load characteristics side by side and find the right fit for your drivetrain.

SpecificationSpur GearsYou're viewing thisHelical & Double HelicalView detailsBevel GearsView details
Tooth geometryStraight-cut teethAngled / herringboneConical — spiral/straight
Shaft arrangementParallelParallelRight-angle / intersecting
Ratio per stageUp to 8:1Up to 10:1Up to 10:1
Efficiency98–99%96–98%97–99%
Load capacityHighVery highHigh
Running smoothnessModerateHigh — quietModerate–high
Self-lockingNoNoNo
Max size160 inLarge-dia.Matched pairs
More gearing
Helical & Double Helical

Helical & Double Helical

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

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

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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.