Product Name: Needle Bearing
Product Code: IKO INA
Product Description: 1. Centrimatic needle roller and cage assembly 2.NA, NKI needle roller bearing 3.RNA, NK type inner ring needle roller bearing 4.HK type drawn cup needle roller bearing 5.BK type stamping Needle roller bearing
details:
 

A needle bearing is a roller bearing with a cylindrical roller that is thin and long relative to its diameter. This type of roller is called a needle roller. Despite its small cross-section, the bearings have a high load carrying capacity and are therefore particularly suitable for applications where radial space is limited.
The contour of the needle roller is slightly contracted at the proximal end face. The result of contact correction between the needle roller and the raceway avoids damaging edge stresses. The supporting roller needle roller bearing is a thick-walled outer ring, which is quenched by high temperature and high nitrogen. The high-precision sorting roller is guided by the rib of the high-rigid outer ring. With the linear contact, the roller can be easily rotated directly on the raceway, and can Withstand huge loads. In order to remove the stress, the outer ring of the supporting roller adopts a curved surface design, and the curved roller has various specifications such as single and double sealing rings, no sealing ring and sealing ring. The sealing ring has a large storage grease, provides long-lasting lubrication of lithium grease, and prolongs the lubrication interval. The seal is made of a framed nitrile rubber or ST12 with an operating temperature range of -30 ° C to +100 ° C or -30 ° C to +180 ° C. The compact curved roller can withstand heavy loads and high performance. RSTO outer ring without ribs, no inner ring support roller
Needle bearing characteristics and uses:
Needle roller bearings are equipped with thin and long rollers (the length of the roller is 3 to 10 times the diameter and the diameter is generally not more than 5 mm), so the radial structure is compact, and the inner diameter and load capacity are the same as those of other types of bearings. The smallest diameter, especially suitable for support results with limited radial mounting dimensions. Depending on the application, bearings or needle roller and cage assemblies without inner ring can be used. The journal surface and the housing hole surface that match the bearing directly serve as the inner and outer rolling surfaces of the bearing to ensure load capacity and running performance. As with ferrule bearings, the hardness of the raceway surface of the shaft or housing bore, the machining accuracy and surface quality should be similar to the raceway of the bearing ring. This type of bearing can only withstand radial loads.
Type of needle bearing
In addition to the catalogue, it can be used for general engineering bearings, such as: open drawn cup needle roller bearings (1), closed cup needle roller bearings (2), needle roller bearings with inner ring (3) and Needle roller bearings with inner ring/without cages without cages (4), with cages and without cages filled with needle bearings (5) SKF can also supply various types of needle bearings, 1, needle roller Cage assembly 2, non-ribbed needle roller bearing 3, self-aligning needle roller bearing 4, combined needle roller/ball bearing 5, combined needle roller/thrust ball bearing 6, combined needle roller/cylindrical roller thrust bearing
STO outer ring without ribs, inner ring support roller
RNA22...2RS double-sided seal, no inner ring support roller
NA22...2RS double-sided seal with inner ring support roller
NATR
NATR...PP flat retaining ring axial guide support roller
NATV
NATV...PP flat retaining ring axial guide support roller, full needle type
NUTR rolling element guide support roller, full roller type
CRY inch flat ring axial guide support roller
Drawn cup needle roller bearings
The drawn cup needle roller bearings are needle bearings with a thin stamped outer ring. Its main features are low cross-section height and high load carrying capacity. Mainly used for bearing arrangements that are compact, inexpensive, and the bore of the bearing housing cannot be used as the raceway for the needle roller cage assembly. The bearing and bearing housing must be installed in an interference fit. If the axial positioning function such as the box shoulder and the stop ring can be omitted, the inner hole of the bearing housing can be made extremely simple and economical.
The drawn cup needle roller bearings mounted on the shaft end are open on both sides (1) and closed on one side (2). The base end face of the closed stamped outer ring can withstand small axial guiding forces.
Drawn cup needle roller bearings generally do not have an inner ring. In the case where the journal cannot be hardened and ground, the inner ring listed in the table can be used.
The hardened steel outer ring of the drawn cup needle roller bearing is inseparable from the needle roller cage assembly. The free space to store the lubricant can extend the relubrication interval. Bearings are generally designed in a single row. Except for the wider series of bearings 1522, 1622, 2030, 2538 and 3038, they are equipped with two needle retainer assemblies. The outer ring of the bearing has a lubrication hole. All single row drawn cup needle roller bearings with a shaft diameter greater than or equal to 7 mm can be equipped with an outer ring with a lubrication hole (code suffix AS1), depending on the user's needs.
Oil seal stamped outer ring needle roller bearing
In the case where the oil seal cannot be installed due to space constraints, the open-end or closed-end oil-sealed drawn cup needle roller bearings (3 to 5) are available. These bearings are equipped with a frictional oil seal of polyurethane or synthetic rubber filled with a lithium-based grease with good rust resistance for an operating temperature of -20 to +100 °C.
The inner ring of the oil-sealed bearing is 1 mm wider than the outer ring. This makes the bearing work well in the case of a slight displacement of the bearing shaft relative to the bearing housing without causing the bearing to be contaminated. The inner ring of the bearing also has lubrication holes, which can be relubricated by the outer ring or the inner ring according to the needs of the bearing arrangement.
Needle roller bearing classification:
Needle roller bearings are divided into:
1. Centripetal needle roller and cage assembly
2.NA, NKI needle roller bearings
3.RNA, NK type needle roller bearing without inner ring
4.HK type drawn cup needle roller bearing
5.BK type drawn cup needle roller bearing
The drawn cup needle roller bearings mounted on the shaft end are open on both sides (1) and closed on one side (2). The base end face of the closed stamped outer ring can withstand small axial guiding forces.
The drawn cup needle roller bearings mounted on the shaft end are open on both sides (1) and closed on one side (2). The base end face of the closed stamped outer ring can withstand small axial guiding forces.
Combined needle bearing
The combined needle roller bearing is a bearing unit composed of a combination of a radial needle bearing and a thrust bearing component. The compact needle size and high rotation precision can withstand a high axial load while bearing a certain axial load. And the product structure is diverse, adaptable and easy to install.
Combined needle roller bearings are widely used in various mechanical equipment such as machine tools, metallurgical machinery, textile machinery and printing machinery, and can make the mechanical system design very compact and dexterous.