What is needle roller bearing
Needle roller bearings are roller bearings with cylindrical roller, relative to its diameter, the roller is thin and long.This type of roller is called a needle roller.
Types of needle roller bearings
1. Pressed outer ring needle roller bearings are needle roller bearings with thin stamped outer ring.Its main characteristic is that the section height is very low and the load bearing capacity is high.Mainly used in compact, inexpensive bearing configurations where the inner hole of the bearing box cannot be used as a raceway for needle cage assembly.The bearing and bearing box shall be installed in an interference fit manner.If the axial positioning function such as box shoulder and stop ring can be omitted, then the inner hole of bearing box can be made very simple and economical.The stamped outer ring needle roller bearing mounted on the shaft end has two sides open type and one side closed type.The base face of the closed stamping outer ring can withstand little axial guiding force.Needle roller bearings with stamped outer rings are generally not attached with inner rings.
2. The solid ring needle roller bearing is composed of one or two rings and a needle roller group with a cage.According to the different application occasions, it can be divided into bearings with or without inner ring.Therefore, solid ring needle roller bearings can meet the requirements of light weight, small space occupation and large power transmission.The solid ring needle roller bearing has smaller volume and higher bearing capacity.
3. Combined needle roller bearing is a bearing unit composed of centripetal needle roller bearing and thrust bearing parts. It has compact structure, small volume, high rotation accuracy, and can bear a certain axial load while bearing a high radial load.And the product structure of various forms, wide adaptability, easy to install.
Combined needle roller bearings are widely used in machine tools, metallurgical machinery, textile machinery and printing machinery and other mechanical equipment, and can make the mechanical system design is very compact and dexterous.
4. Thrust type needle roller bearing is composed of thrust cage assembly and thrust washer with needle roller or cylindrical roller or ball.Needle rollers and cylindrical rollers are held and guided by thrust retainer.Due to the use of high precision cylindrical needle roller to increase the contact length, the bearing can obtain high load capacity and high stiffness in a small space.Another advantage is that if the adjacent part surface is suitable for raceway surface can eliminate the washer, can make the design compact, reduce the edge stress, improve the service life.
Advantages of needle roller bearings
Needle roller bearings are equipped with thin and long rollers, so the radial structure is compact, the inside diameter size and load capacity are the same as other types of bearings, the outer diameter is the smallest, especially suitable for the radial installation size of the limited supporting structure.Needle roller bearings according to the use of different occasions, processing accuracy and surface quality should be combined with bearing ring, purpose.Needle roller bearing is a bearing unit composed of centripetal needle roller bearing and thrust bearing components.
Points for attention when using needle roller bearings
Needle roller bearing has a large bearing capacity and is suitable for mounting the supporting structure with limited size. The surface of the journal is hardened as the rolling surface, and the bearing is loaded into the seat hole with pressing fit, and there is no need to position it axially.Bearings should be injected with appropriate amount of grease before installation, usually, after assembly, no more lubrication type bearings used in the journal without protruding end of the support, end face closure plays a sealing role, and can withstand small axial swimming.
The price of needle roller bearings
The price of needle roller bearings is affected by many factors such as market, material and quotation. If you want to know the specific price of needle roller bearings，please contact us to make enquiries.
Supplier of needle roller bearings:BMB Bearings
BMB Bearings is the complete one-stop supplier of OEMs and wholesalers purchasing high-precision, miniature ball bearings, industrial ball bearing related products, as well as related professional services, including world-class engineering and design. If you have any need, please feel free to contact us