NA6911 needle bearing

Roller bearings are widely used in various applications. They can be found wherever there is linear motion, curved guidance, or driven tracking. 

Cam mechanism: The most classic application. The roller acts as the driven part, precisely following the contour of the cam to convert rotational motion into the desired linear or oscillating motion. It is widely used in automated machine tools, packaging machinery, internal combustion engine valve actuation mechanisms, etc. 

Linear guide rails and track systems: Used to support and guide worktables, sliders, doors, conveyor belts, etc. to move smoothly along straight or curved tracks. Commonly found in sliding doors of large warehouses, automated storage warehouses, and production line conveying equipment. 

Guide wheel/tension wheel: Used to direct the direction of chains, belts or cables, or to adjust their tension. 

Construction machinery: As the supporting wheels, idler wheels and guide wheels of the crawler-type machinery, they bear the entire weight of the machine and roll on the crawler surface. 

Others: Textile machinery, printing machinery, material handling equipment, etc. 

Summary

The core value of roller bearings lies in their ability to seamlessly integrate the two functions of "supporting rotation" and "direct rolling". It is not designed for high-speed rotation in a confined space, but rather as a robust and reliable rolling contact point in medium and low speeds, high loads, and environments with impacts. When your design requires such a "functional wheel", choosing an appropriate roller bearing is often the most efficient and reliable solution.