Main components and features:
Needle roller bearings:
These bearings consist of long, narrow (needle-shaped) cylindrical rollers that provide a large contact surface with the shaft and housing.
Without inner ring:
In this type, there is no inner ring and instead, the shaft acts as the inner surface of the bearing. The shaft must be precisely machined and hardened to act as the contact surface of the bearing.
Single row:
This means that the rollers are arranged in a single row.
High radial load capacity:
Due to the large contact surface of the rollers, these bearings are capable of carrying high radial loads.
Small dimensions:
Due to the use of needle rollers, these bearings have small radial dimensions and are suitable for limited spaces.
Application:
Generally used in machinery and equipment that need to carry high radial loads in a small space.
Advantages:
High load capacity in a small space:
Despite their small dimensions, these bearings are capable of carrying heavy loads.
Weight reduction:
Due to the elimination of the inner ring, the weight of the bearing is reduced.
Friction reduction:
Friction in these bearings is low due to the use of needle rollers and large contact
surfaces.
Disadvantages:
Requires quality shaft:
The shaft must be precisely machined and hardened to serve as the inner surface of the bearing.
Lack of axial load capacity:
These bearings are not suitable for supporting axial (longitudinal) loads.
Applications:
Automotive gearboxes, small electric motors, industrial equipment with limited space, jet engines, precision instruments.