Bearing torque, load and life
Starting Torque
The torque required to initiate the rotation of one bearing ring or washer relative to another fixed component. This is the force needed to overcome initial resistance and begin motion.
Rotational Torque
This refers to the torque that must be applied when one bearing ring or washer is rotating, while the other remains stationary. It represents the resistance encountered during continuous movement.
Radial Load
A load acting perpendicular to the axis of the bearing, typically in a direction that pushes the bearing components toward each other. It is commonly experienced in radial bearings.
Axial Load
A load that acts parallel to the axis of the bearing. This type of load is common in thrust bearings and can cause movement along the axis of the bearing.
Static Load
When there is no relative motion between the bearing rings or between the rolling elements and raceways, the load applied to the bearing is considered static. This applies to both radial and axial directions.
Dynamic Load
This occurs when there is relative motion between the bearing components, such as when the rings rotate or the rolling elements move. Dynamic loads are associated with operating conditions.
Equivalent Load
A calculated value used to represent the actual load on a bearing under specific operating conditions. It allows for standardization when comparing different loading scenarios.
Radial (Axial) Basic Static Load Rating
This is the maximum static load that a bearing can withstand without causing permanent deformation in the rolling elements or raceways. For roller bearings, it corresponds to the load that causes a total permanent deformation equal to 0.0001 times the diameter of the rolling element at the contact point.
Radial (Axial) Basic Dynamic Load Rating
This is the constant radial (or axial) load that a bearing can theoretically endure for a basic rating life of 1 million revolutions. It is used to predict the performance and longevity of the bearing under dynamic conditions.
Life (of a Bearing Set)
The number of revolutions a bearing can complete before the first signs of fatigue occur in its components. Life can also be expressed in hours of operation at a given speed.
Reliability (in Relation to Bearing Life)
The probability that a bearing will perform above a specified life under consistent operating conditions. It is often expressed as a percentage, with 90% reliability being a common benchmark.
Rating Life
An estimated life of a bearing based on its dynamic load rating. It provides an expectation of how long the bearing can operate before failure occurs.
Basic Rating Life
The life that 90% of a group of identical bearings can be expected to achieve under standard operating conditions. This is a widely accepted measure of bearing durability.
Life Factor
A correction factor used to adjust the equivalent dynamic load so that the bearing’s life matches a desired rating. It helps account for variations in operating conditions.
Plummer Block Bearings
These are bearing assemblies that combine a radial bearing with a housing that has a base plate for mounting screws. They are designed for use in applications where the bearing axis is parallel to the support surface.
Vertical Plummer Block Housing
This is a type of housing designed to accommodate rolling bearings. It provides structural support and alignment for the bearing assembly.
Flanged Housing
This type of housing features a radial flange and a seat on the support surface. It includes screw holes for secure mounting and is used in applications where the bearing axis is perpendicular to the mounting surface.
Adapter Sleeve
An axially open sleeve with a conical outer surface and an externally threaded end. It is used to mount tapered bore bearings onto cylindrical shafts using a lock nut and washer.
Withdrawal Sleeve
A sleeve with a conical outer surface and a threaded end, used to either install or remove a tapered bore bearing from a cylindrical shaft. It simplifies the process of bearing installation and removal.
Lock Nut
A nut with a grooved surface that locks into place using a lock washer and wrench. It is used for securing bearings in position and preventing loosening during operation.
Lock Washer
A thin steel washer with multiple outer teeth that engage with the nut and the shaft or adapter sleeve. It prevents the nut from loosening due to vibration or movement.
Eccentric Locking Collar
A steel ring with an eccentric hole that is mounted on the inner ring of an outer spherical bearing. By rotating the collar, it secures the inner ring to the shaft.
Concentric Locking Collar
A steel ring mounted on the inner ring of an outer spherical bearing. It uses a top wire that is tightened against the shaft to provide a secure and stable fit.
Kitchen Drawer Anti-Slip Rubber Mat,Disposable Drawer Liner,Drawer Table Shelf Liner,Ptfe Oven Mesh Liner
Anyang Qunxiu Plastics co.,ltd , https://www.qunxu.com