Spare parts and quick-wear parts are components of a machine or device that may need to be replaced periodically due to wear and tear.Spare parts are additional components that are not essential to the operation of a machine, but can be used to repair or maintain it when necessary. They are typically kept in stock or can be ordered as needed. Examples of spare parts include spare tires for a car, extra blades for a power saw, or extra filters for a vacuum cleaner.Quick-wear parts, on the other hand, are components of a machine that are subject to rapid wear and tear and may need to be replaced more frequently. These parts are often made of materials that are less durable than the main components of the machine and may need to be replaced more often to ensure optimal performance. Examples of quick-wear parts include brake pads for a car, blades for a lawn mower, or tires for a bicycle.

A yoke is a device that is used to connect two objects or parts together, often in order to transmit force or motion. Yokes can be found in a variety of applications, including machinery, vehicles, and sporting equipment.In machinery, a yoke is often used to connect two rotating parts, such as gears or pulleys. It is typically made of metal or another durable material and is designed to transmit torque or power between the two parts.In vehicles, a yoke is often used to connect two shafts or other components that rotate together. For example, a driveshaft yoke connects the driveshaft to the transmission or differential in a car or truck.In sporting equipment, a yoke is often used to connect two poles or other parts of an apparatus. For example, a yoke may be used to connect the two poles of a ski lift, or the two handles of a rowing machine.