Arrow's history as an aerospace gear producer spans more than 60 years of the company's history. Early on, Arrow was contracted by Pratt & Whitney for supplying spiral bevel aircraft gears - and has been supplying quality products to the aerospace industry ever since. In fact, to the best of our knowledge, Arrow supplies more loose gears for jet engines than any other gear company in the world.

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.

Master gears are used as a reference standard during the manufacturing process to verify ideal contact pattern and tooth thickness of bevel gears. Arrow has produced hundreds of master gear sets for customers as well as for internal production processes. With the integration of Arrow's advanced systems for the verification of gear tooth topography, Arrow has the ability to work with digitized gear masters and offers this to customers as an efficient alternative to existing techniques.

Manufacturers looking for a gear producer to supply high quality right angle gears need to look no further than Arrow Gear. Arrow is widely known for the production of spiral bevel right angle gears. Early on in the company's history, company founders James J. Cervinka and Frank E. Pielsticker made the decision that they would master this esoteric product design.

Arrow Gear offers a wide variety of ground and non-ground spiral bevel stock gears which can serve as a convenient cost-effective gearing solution for our customers. One major benefit of working with Arrow as a supplier of prototype gears during new product development is our full line of stock gears. Arrow's stock gear products feature spiral bevel gears in a wide range of sizes. Using these high quality products as prototype gears improves lead time, and can later be used as production gears as the manufacturing process gets underway.

While Arrow manufactures hypoid gears with offsets, a far more common style produced by Arrow is the spiral bevel gear - an Arrow Gear specialty. Spiral bevel gears are used to transmit power between shafts that are typically at a 90-degree orientation to each other. Spiral bevel gears, like other hypoid gears, are designed to be what is called either right or left handed. [Fig.1] A right hand spiral bevel gear is defined as having the outer half of a tooth curved in the clockwise direction at the midpoint of the tooth when it is viewed by looking at the face of the gear. For a left hand spiral bevel gear, the tooth curvature would be in a counterclockwise direction.

As their name suggests, Straight Bevel Gears have a straight tooth geometry, which if extended, would pass through the point of intersection of their axes. These are the simplest form of bevel gear. Like spur gears, the teeth on a straight bevel gear are straight, but they taper from the large diameter of the gear tooth (the heel) to the small diameter (the toe).