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The Boston Gear low carbon steel spur gear with 14.5-degree pressure angle (PA) and a diametral pitch (DP) of 24 transmits torque between parallel shafts to provide rotational power to another part of a motorized system. It has a 14.5-degree pressure angle for a higher contact ratio between gears than larger pressure angles, resulting in quieter operation, and a 24-diametral pitch for applications for applications where controlling changes in speed and direction of rotation with precision is more important than transferring torque. This spur gear, which can mesh only with spur gears that have the same pressure angle and diametral pitch, is made of low carbon steel (.2 percent carbon) for applications where the hardness and strength of higher levels of carbon are not needed to transmit torque and motion. This Boston Gear spur gear is suitable for use in a variety of commercial and industrial applications, such as construction equipment, aeronautics, conveyors, and manufacturing equipment, among others.
Spur gears, the most common gear type, have a circular or cylindrical shape with teeth bordering the outer perimeter and are used for transmitting rotational torque and motion between parallel rotating shafts. A spur gear's pressure angle (PA), diametral pitch (also called DP or pitch), and its material are important factors to consider when purchasing. Gears come in several types for use in different power transmission configurations and for different applications, including bevel and miter gears (for rotating shafts perpendicular to each other), change gears (to increase or decrease torque and speed), helical gears (for high rates of rotational speed), internal gears (where one gear is nested inside the other), rack and pinion gears (for turning rotational motion into linear motion), and worm gears (for perpendicular shafts in tight spaces and quiet operation). Gears are suitable for use in the agriculture, automotive, construction, mining, and packaging industries, and can be found in a variety of machines, including bicycles, automobiles, and elevators, among others.
Boston Gear manufactures a variety of gear drives, variable speed drives, clutches, and the components that comprise these systems including sprockets and bearings. Their manufacturing designs, production, and inspection meet International Organization for Standardization (ISO) standards for quality assurance. The company, founded in 1877, is headquartered in Charlotte, NC.
Melissa Howard
Reviewed in the United States on October 11, 2020
Gear is a 42 tooth gear but the shaft is flush with the gear, not like the picture on amazon. The 2 gears in the picture are shown as the same on amazon with a different teeth count. The S means that it’s a flat gear and the H has a shaft with pin hole. Maybe a different picture for different gears would stop any confusion.
Glassman
Reviewed in the United States on August 23, 2015
This gear was a replacement for a pair of electric rollers. It was a exact match and works just like new.
Todd Wysuph
Reviewed in the United States on September 22, 2014
Great quality gear, but: 1) the engineering drawings are wrong -- the set screw cannot be a 10-32, it's something closer to a 6-xx, although even that is too large to fit; 2) no set screw was included; and 3) it doesn't seem like the set screw hole is threaded. Had to force an oversized screw into the hole to get it to attach to the shaft.
Jeffrey Horton
Reviewed in the United States on March 29, 2014
nothing cheap about this gear. I found others out there that were 30 bucks more and not as nice. Quality.
at
Reviewed in the United States on November 5, 2014
Good product...
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