In this post we are discussing the different types of roller element bearings.
This article discusses 5 types of rolling element bearings. In a previous article, we discussed the basic individual elements of a ball bearing where, and how they we manufactured, but just to recap, ball bearings are used in just about everything… from gearboxes and engines down to go-cars, skateboards and roller skates. We discussed the elements such as the bearing, the raceway and the cage.
Rolling element bearings are basically bearings which can roll on one or two more axis, either shaped into spherical balls or cylinders, which roll along a raceway. The load is placed on the bearings and the raceway and lubrication assists in keeping the joint moving and transferring the power.
The first type of roller bearing is the simple ball bearing. Ball bearings are perfectly round and placed in between the bearing race or raceway. The ball bearings round nature means it can move on any axis, therefore provides much flexibility when required.
Cylindrical bearings or cylindrical roller bearings, are shaped into cylinders, much like a can of lemonade. These bearings will only roll on one axis – back and forward. They are also placed within the bearings raceway. Spherical roller bearings are very similar, but have a rounded part in the mid section. Needle roller bearings are also similar, but the pins are rolled much longer and therefore have a needle like appearance. These needle bearings provide cover to the the entire surface of the raceway.
Tapered roller bearings are slightly different, While the bearings are in a cylindrical fashion, there is a taper on them, which gives them the cone-shape appearance. These enable for a diagonal planar movement. These bearings can withstand both radial and axial loading.
Roller bearing elements undergo a lubrication process known as elastohydrodynamic lubrication. This process involves the oil under the bearing becoming almost solid-like, and elasticates the bearing element for a moment. It’s vital to ensure the correct lubricant is used and that there are no contaminates in the system. In a previous article, on “5 reasons for bearing failure“, we discussed reasons for bearing failure and causes for manufacturing lines to be shut down. Please ensure that the environment is clean, bearings and fluid are designed to operate with the temperatures and humidity of the environment.
For all your bearing needs, please contact Hydra Seals, Hose & Bearings through our contact page or via phone on +353 1 8612700.