Our team at Robust Gear can provide you with customized OEM for double helical or “Herringbone” gears. Our superior quality double helical gears are manufactured to your individual design specifications. These gears have the same advantages as single helical gears with the added benefit of greater strength and durability. We strive to maintain the highest industry standards and our finishing process is in proximity to the AGMA™ Standard 8-10. We can manufacture herringbone gears in accordance with either North American or metric systems of measurement. Flame Hardening, Heat treating, Induction Hardening, Carburizing, and Nitriding are optional services that are available upon request.
Engineering Capacity Specifications of Herringbone Gears
1. Circular pitch(CP) - is a direct measurement of the distance between the center of one tooth to the center of the adjacent tooth. Maximum CP up to 72inches in diameter.
2. Diametrical pitch - is the ratio of the number of teeth to the pitch diameter (in inches) of a gear. Maximum of 2DP.
3. Module(mod or M) - is used for metric gears and is the ratio of pitch diameter (in millimeters) to the number of teeth. Maximum of 12 Module.
4. Pressure angle - is the angle of tooth drive action, or, the angle between the line of force between meshing teeth and the tangent to the pitch circle at the point of mesh. Typical pressure angles are 14.5⁰ or 20⁰. 380 maximum BHN specifications.