Key features and characteristics of NUP type cylindrical roller bearings :
Two integral ribs on the outer ring:
These ribs prevent axial movement of the outer ring in both directions . One integral rib and one loose rib on the inner ring:
The integral rib on the inner ring provides axial restraint in one direction, while the loose rib (often a washer) allows for some axial movement in the other direction, enabling the bearing to accommodate thermal expansion or contraction of the shaft or housing .
Locating bearing:
NUP type bearings are typically used as locating bearings, meaning they are designed to fix the position of a shaft or other rotating component axially .
Axial guidance:
The specific rib configuration allows these bearings to guide the shaft axially in both directions .
Radial movement:
While providing axial guidance, these bearings also allow for some radial movement of the shaft within the bearing .
Example:
NUP Bearings | The BBC-R Company Imagine a rotating shaft in a machine. A cylindrical roller bearing of type NUP could be used to fix the axial position of the shaft while allowing it to move slightly in the radial direction (e.g., due to slight misalignments or thermal expansion). The two ribs on the outer ring would prevent the shaft from moving axially in either direction, while the single rib and loose rib on the inner ring would allow for some axial movement due to thermal expansion or slight misalignments