What are needle bearings?-Introduction of needle bearings
What are needle bearings? Needle bearings are roller bearings with rollers that have high length-to-diameter ratios. Needle bearings use long, thin cylindrical rollers resembling needles. They typically have rollers that are at least four times longer than their diameter.
Many light-duty bearings never need relubrication, but high loads or high speeds require it.
Compared to other roller bearings, needle roller bearings have much smaller rollers for a given bore size. They have the highest load capacity in each radial space of any rolling element bearing, but their use is limited to bores smaller than 10 inches.
All needle roller bearings are variants of two basic designs.
The first is full of needles, which has a full complement of needles and does not include a retainer.
The second, caged needle, contains a cage for roller guidance and spacing. Caged needle bearings have smaller roller assemblies and lower load capacities than full complement bearings. Their advantage is higher speed capacity; retainers prevent high-speed friction between adjacent needles and provide more efficient roller guidance. They also have greater lubricating capacity.
What are needle bearings?-The main type of needle bearings
Thanks for reading “ What are needle bearings?“.
If you want to know more models and sizes, please click the following website to get our catalog: https://iskbearing.com/products-catalogue/
If you have any questions, please do not hesitate to contact us:
Taiwan Head Office-JOTA BEARING CO., LTD./ISK BEARING