Products > Zerol Bevel Gears

Zerol® Bevel Gears

Zerol Gear produced by Arrow Gear
Zerol Bevel Gear

Zerol® Bevel Gears are spiral bevel gears, but the spiral angle of the teeth is zero. If the curvature of the tooth is a large radius, they can easily be confused with a straight bevel gear.

The sides of a straight bevel tooth will either both be straight or both have a slight convex barrel shape. The Zerol bevel teeth will be slightly curved with one concave and one convex side. Zerol bevel gears act the same way as a straight bevel gear in a gearbox, but are manufactured on more accurate machinery and can be precision finished. Figure 1 shows the difference between spiral angles for a single tooth on both a spiral bevel and a Zerol bevel gear.

Arrow’s size range and capabilities for Zerol® Bevel Gears are provided in the list below.

Comparison of Zerol and Spiral bevel gear spiral angles
Fig.1 - Comparison between spiral angles of Spiral Bevel and Zerol Bevel Gears.

Maximum Pitch Diameter – 22”
Diametral Pitch – 1.5 – 48
Face Width – 4.0
Unground Tooth – AGMA Q9*
Ground Tooth – AGMA Q13

* Some configurations to AGMA Quality Number 10 (lapped).

Zerol Gear Teeth produced by Arrow Gear
Zerol Bevel Gear Teeth