Gearbox use bearings

There are many types of gearbox bearings, including deep groove ball bearings, cylindrical roller bearings, full complement cylindrical roller bearings, double row tapered roller bearings, spherical roller bearings, spherical roller thrust bearings and four point contact ball bearings. The bearings in the gear box are mainly lubricated by the gear oil in the gear box. Wheel Bearings There are many metal particles in the lubricating oil, which will significantly affect the bearing life. Therefore, a special heat treatment process is required to make the raceway surface have compressive stress and reduce the sensitivity of the raceway to particulate impurities and improve bearing life. At the same time, it is also necessary to optimize the gearbox bearing structure according to the working conditions of the bearing, improve the bearing processing technology, and further improve the gearbox bearing performance index. 

Types of roller bearings

Type N – products include in their design a cage, an outer ring with a pair of flanges and an outer ring without flanges. In N-type roller bearings, the axial displacement of the shaft is compensated in 2 directions with respect to the coupling housing. The models are characterized by high speeds with maximum radial load capacity.

Type NU – bearings, the main design feature of which is the presence of a pair of flanges on the outer ring and their absence on the inner one. Needle Roller Bearings They are able to accept large radial loads without the ability to withstand axial ones.

Type NJ – products include models whose outer ring is equipped with 2 flanges, and the outer ring with 1. These roller bearings are designed to provide one-sided shaft fixation.

Type NUP – products with a pair of beads located on the outer ring and 1 on the inner. Also in their design there is 1 removable side, which is a free ring. This type of bearing is used to securely fix the position of the shaft on both sides.

All varieties of single row roller bearings are characterized by high rigidity, low friction, maximum load capacity.

what are cylindrical roller bearings used for


Cylindrical roller bearings have high radial-load capacity and moderate thrust loads. They contain rollers which are cylindrically-shaped, but are not true cylinders. Instead, these rollers are crowned or end-relieved to reduce stress concentrations. This geometry results in low friction and allows for high-speed applications. Cylindrical roller bearings are commonly available in precision grades such as RBEC-5, a classification from the Roller Bearing Engineers Committee (RBEC). RBEC ratings describe the accuracy and tolerance range for different types of bearings. As a rule, the higher the RBEC number, the tighter the bearing tolerances. Typically, cylindrical roller bearings are lubricated with oil, which also serves as a coolant.
Specifications
Bore size and outside diameter (OD) are important specifications to consider when selecting cylindrical roller bearings. The bearing industry uses a standard, numbered system for roller bearings with metric-diameter bores. For bore sizes 04 and up, multiply the bore size by 5 to identify the bore diameter in millimeters (mm). The outside diameter of cylindrical roller bearings includes the housing (if any), but excludes the flange.Cylindrical Roller Bearing image

what are cylindrical roller bearings used for


Cylindrical roller bearings have high radial-load capacity and moderate thrust loads. They contain rollers which are cylindrically-shaped, but are not true cylinders. Instead, these rollers are crowned or end-relieved to reduce stress concentrations. This geometry results in low friction and allows for high-speed applications. Cylindrical roller bearings are commonly available in precision grades such as RBEC-5, a classification from the Roller Bearing Engineers Committee (RBEC). RBEC ratings describe the accuracy and tolerance range for different types of bearings. As a rule, the higher the RBEC number, the tighter the bearing tolerances. Typically, cylindrical roller bearings are lubricated with oil, which also serves as a coolant.


Specifications
Bore size and outside diameter (OD) are important specifications to consider when selecting cylindrical roller bearings. The bearing industry uses a standard, numbered system for roller bearings with metric-diameter bores. For bore sizes 04 and up, multiply the bore size by 5 to identify the bore diameter in millimeters (mm). The outside diameter of cylindrical roller bearings includes the housing (if any), but excludes the flange.Cylindrical Roller Bearing image

Self-Aligning Ball Bearings

Valin recommends Self-Aligning Ball Bearings when the alignment of the shaft and housing is problematic and the shaft may bend.
The outer ring has a spherical raceway and its centre of curvature coincides with that of the bearing; therefore, the axis of the inner ring, balls and cage can deflect to some extent around the bearing centre.
The axial load capacity is low since the contact angle is small. Under normal loads, the permissible dynamic misalignment is approximately 0.07 to 0.12 radian (4 to 7 degrees).

Product Features and Benefits:

High Quality Steel – Ultra clean steel to extend bearing life by up to 80%.
Pressed steel and polyamide cages available.
Advanced Grease Technology – NSK lubricants that can extend grease life and performance.
High Grade Balls – Quiet and smooth operation even at high speed.
Super Finished Raceways – Specially honed to minimise noise and improve lubricant distribution and life.
Sealed versions available

Product

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