Combined Type Needle Roller Bearings are combinations of a radial bearing and a thrust bearing. Caged Needle Roller Bearings are used as radial bearings and Thrust Ball Bearings or Thrust Roller Bearings are used as thrust bearings. They can be subjected to radial loads and axial loads simultaneously.
Roller Bearings, in which rollers are incorporated in double rows, are non-separable heavy-duty bearings. They can withstand not only radial loads but axial loads as well, which are supported at the contacts between the shoulders of inner and outer rings and the end faces of rollers. Therefore, they are most suitable for use at the fixing side of a shaft.
Machined Type Needle Roller Bearings have an outer ring made by machining, heat treatment. and grinding. The outer ring has stable high rigidity and can be easily used even for light alloy housings. These bearings are available in various types and optimally selectable for different conditions such as heavy loads. high-speed rotation and low-speed rotation. They are most suitable for general-purpose applications.
Inner Rings are heat-treated and finished by grinding to a high degree of accuracy and are used for Needle Roller Bearings. In the case of Needle Roller Bearings. normally the shafts are heat-treated and finished by grinding and used as raceway surfaces. However, when it is impossible to make shaft surfaces according to the specified surface hardness or surface roughness, Inner Rings are used .
In Needle Roller Bearings with Separable Cage. the inner ring, outer ring and Needle Roller Cage are combined, and they can be separated easily. This type has a simple structure with high accuracy. In addition. the radial clearance can be freely selected by choosing an assembly combination. These bearings have excellent rotational performance, because Needle Roller Cages are used
Shell Type Needle Roller Bearings are lightweight with the lowest sectional height among needle roller bearings with outer ring, because they employ a shell type outer ring made from a thin special-steel plate which is accurately drawn, carburized and quenched. Since these bearings are press-fitted into the housing, no axial positioning fixtures are required. They are ideal for use in mass-produced artic es that require economy.
Thrust Bearings consist of a precisely made cage and rollers, and can receive axial loads. They have high rigidity and high load capacities and can be used in small spaces. Thrust Needle Roller Bearings use needle rollers. while Thrust Roller Bearings use cylindrical rollers.
