Stock Gear Rating Data and Specifications

Rating Data and Specification for Standard and Ground Tooth Stock Spiral Bevel Gears

Arrow stock spiral bevel gears are lapped to AGMA Quality Number 9 or ground to AGMA Quality Number 11. Each pair of gears is made of alloy steel with carburized and hardened teeth. 20 degree pressure angle and 35 degree spiral angle are standard. All pinions are left hand spiral. Mounting distance, backlash, mating teeth and set number are etched on each pair.

Hub type gears can be rebored to the maximum diameter specified in the tables. It is preferred that all rematchining of bores be performed by Arrow Gear Company.

Bevel Gear Quality Assurance

Our gears are made from the highest quality material and case hardened for maximum life.  We have been making bevel gears for 70 years and are the experts in the industry.  Try our stock bevel sets for your next project; you won’t be disappointed.



Service factors have been determined by many industries for specific applications from field data and should be used when available. In the absence of a service factor, select an appropriate overload factor.


AA 1.49 SF indicates that the stock gear set has a capacity of 1.49 times that required.

Gear sizes in this manual must be selected from the calculated allowable torque. For applications involving unusual conditions, our Engineering Service is available.

This information is on page 4 of our Stock Gear Catalog.
Click HERE to download a PDF version of that page.