Standards：GOST/ASTM/GB
Inner diameter (ID)：5mm-900mm
Outer diameter (OD)：30mm-1500mm
Weight：0.005kg - 820kg
Structures：outer ring, inner ring, roller, and cage
Applications：transmissions for automobiles, harvesters, agricultural machinery, rolling mills, cranes and machine tools etc.
Needle roller bearing is special type of cylindrical roller bearing. The rolling elements of QIBR needle roller bearings are long cylindrical roller bearings with small diameters (the ratio of diameter to length of the rollers is between 1:2.5 and 1:10). With flat or light rounding ends, the radial section size is small. Needle roller bearings have high radial load carrying capacity and good bearing rigidity. It is especially suitable for use in applications where radial mounting dimensions are limited. Needle roller bearings can only withstand pure radial loads and cannot limit the axial displacement of the shaft and housing.
Needle roller bearings generally consist of outer ring, inner ring, roller, and cage. But some structures do not have cage, some have no inner ring, some have no outer ring, but only the needle roller and cage assembly.
The outer dimensions of QIBR needle roller bearings conform to GB/T273.3 "Genera plan for the outer dimensions of rolling bearing radial bearing", GB/T290 "Dimensions of rolling bearing crushing outer ring needle roller bearings", JB/T7918"Rolling bearings radial needles and cage assembly", JB/T 3588 "Dimensions and tolerances of rolling bearing full complement needle roller bearing ", JB/T3370 "Rolling bearing universal joint cylindrical roller bearing" and other regulations.
The tolerance of QIBR standard needle roller bearings meets the requirements of GB/T307.1 "Tolerance of rolling bearing radial bearing" and other standards. The clearance of QIBR standard needle roller bearings are divided into two types, bearings with inner and outer rings meet the requirements of GB/T4604 "radial clearance of rolling bearings". The clearance of bearings without inner/outer ring or with only one ring is the diameter tolerance of the matching shaft diameter or the bearing housing bore.
The dimensional tolerance grade of QIBR needle roller bearings is generally made according to P0 (normal grade) and clearance according to group 0 (basic group). If customers have other special requirements (including non-standard) for size, tolerance and clearance, QIBR are able to provide the corresponding product.
QIBR non-standard customized cylindrical roller bearing (Introduction of non-standard products)
Non-standard cylindrical roller bearing customization is a main part of QIBR categories. It can be customized according to the customer's working conditions or the place where the bearing works. Internally we can optimize and improve the design of the cylindrical roller bearing, which can improve the loading capacity and service life of bearing. QIBR can also provide needle roller bearings with a curvature of the raceway, as shown below. It is also possible to newly design needle roller bearings or long cylindrical roller bearings with individual customer requirements.
Needle bearing with arcing raceway can also be made into a needle bearing with a sealed structure, and the outer diameter can also be made into a needle bearing with a stopping groove according to customer needs.
