Needle roller bearings round bottom, are able to withstand heavy axial loads and, while not sensitive to shock loads, require as little axial space as possible for installation. These roller bearings can withstand axial loads from only one side.
Needle roller bearings round bottom
This product includes a housing washer, a shaft washer, and a rack and roller set. The rack and roller set can be used with only one sufficient washer, provided that the bearing location has sufficient surface hardness and smoothness.
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Bearing washers
Like round-bottom cylindrical rolling bearings, this type can also use screw washers and screw washers instead of housing and shaft washers. Screw washers are made of hardened chromium steel. Their screw is paid and the rest of the surfaces are machined.
In cases where the accuracy of the center of the washer is not required, this type of washer can be used as a shaft and housing washer.
Shovel washers are usually about 1 mm thick and made of veneer steel. These types of washers can also be used in place of container or shaft washers.
In these roller bearings , a central washer and two series of roller bearings shelf and roller assemblies can be used to double the axis to bear the axial load on both sides. In needle-shaped round floor rollbearings, no asymmetry is allowed.
The shelf of the roller bearing needles is a round steel floor and in some cases a fiber, in which case the bearing is capable of operating up to a temperature of 120°C.
In parts that are in direct contact with the rolling bearings, issues such as having the right angle to the shaft axis and having a one-way state (no stairs) are of particular importance.
In the absence of housing and shaft washers, the hardness of the surface on which the rack and roller assembly is mounted shall be between 58HRC and 64HRC and the surface hardness shall not exceed 0.2μm (Ra<0.2 m). The lower the hardness, the lower the load-bearing capacity of the assembly.
Radial guidance of the rack and roller assembly is especially necessary at high speeds.
