what locks the output gears onto the output shaft


What Secures the Output Gears to the Output Shaft?

One of the most important components to the operation of any machine is the output shaft and the gears that allow the machine to work properly. An output shaft is the part of the machine that enables it to produce a useful pattern or motion, usually by transferring rotary motion from a prime mover like an electric motor or internal combustion engine. It is output shafts and the gears they carry that transmit power from the source of the machine out to where it will then be used.

Why Are Output Gears Necessary?

Output gears are necessary to help transmit the correct amount of power from the input shaft to the output shaft. Without them, the machine may not be able to run at the correct speeds and torque and will be unable to perform the tasks it was intended for.

What Keeps the Output Gears in Place?

The output gears must be secured properly to ensure that they are able to provide the necessary power to the output shaft. This is usually done with a combination of specialized components and methods, such as:

  • Hub Lock Rings: Lock rings are used to secure output gears to the output shaft. They are typically made of steel and have a springy steel inner ring that presses against the gear teeth, providing a tight fit and preventing the gears from slipping off.
  • Retaining Arms: Retaining arms are generally fitted to the output shaft and act to firmly secure the output gear to the shaft. Some arms are adjustable and may be tightened in order to maintain a secure fit.
  • Mount Bolts: Some output gears have slots or tabs that allow them to be bolted down to the output shaft. This allows for the gear to be securely fitted without the need for additional retaining arms or extra components.
  • Shims and Washers: In some cases, shims and washers are added to the output shaft and may provide additional support for the output gear. This helps to achieve a tight, secure fit that prevents the output gear from slipping or becoming loose.


The output gears of a machine are essential for ensuring that power is transmitted correctly and efficiently from the input to the output shaft. To ensure that these gears stay securely in place, they are typically secured with a variety of components and methods, such as lock rings, retaining arms, mount bolts, and shims and washers. With proper fitment and maintenance, output gears can provide a reliable, long-lasting solution for a machine’s power transmission needs.