This is a small, solid spur gear with a keyed bore, likely intended to act as a pinion (the smaller gear) in a spur gear pair on parallel shafts.
Main features
- The gear has straight teeth running parallel to the axis, which classifies it as a spur gear used for transmitting motion between parallel shafts.testbook+1
- It has a relatively small tooth count and no separate hub; the body is a single thin disk with teeth around the periphery and a central bore. Such a compact form is typical for pinions or thin spur gears where axial space is limited.grobinc+1
- A keyway is cut into the bore so the gear can be mounted on a keyed shaft, ensuring a positive drive with no slip between shaft and gear under torque.
Function and use
- When meshed with a larger spur gear, this component will usually serve as the driving pinion, establishing the gear ratio based on the relative tooth counts and providing speed increase at the mating gear or torque multiplication at the pinion, depending on which is driver.
- Thin keyed spur gears like this are widely used in light machinery, automation equipment, and compact gearboxes where precise speed ratio, high efficiency, and simple assembly on a shaft are required.
