19 janvier 2020 ~ 0 Commentaire

What Is The Difference Between A Roller Bearing And A Ball Bearing?

Roller Bearings are a type of rolling-element bearing that uses cylinders (rollers) to maintain the separation between the moving parts of the bearing (as opposed to using balls as the rolling element). We offer from stock a full range of bearings including Ball, Angular contact, Self-aligning, Cylindrical roller, Spherical roller, Needle roller, Taper roller, High precision, Cam rollers, Support rollers, Sleeves, Thrust, Linear, Duplex and Ball bearing units all in metric and imperial sizes.
These types are commonly used in gear drives, crop shears, rolling mills, and other general machinery industries. Ball Bearings: Ball bearings, are probably the most Single Row Self-Aligning Roller Bearings common type. Because of the small area of contact that is holding a particular load, the balls may become deformed and ruin the bearing if it becomes overloaded.

Precise tolerances, in conjunction with contoured rollers, significantly increase bearing capacity compared with previous bearing systems, making it possible for bits to function normally under higher weights on the bit and rotary speeds and still provide longer bearing life.
The life of a rolling bearing is expressed as the number of revolutions or the number of operating hours at a given speed that the bearing is capable of enduring before the first sign of metal fatigue (also known as spalling) occurs on the raceway of the inner or outer ring, or on a rolling element.

Bearings come in three numeric series; extra light bearings which is ideal for limited space applications, light series bearings which comes in handy between space and load capacity and medium series which is ideal for heavier load capacity held by the bearings.
As a general guideline, ball bearings are great for small machines and work well at high speeds while roller bearings are perfect for heavy loads. Taper roller bearings are available in inch and metric sizes. The thrust ball bearing is useful for its ability to accept an axial load in a single direction.

The ball thrust bearing is a practical choice for the low-speed application and isn’t built to accept a high radial load. Because of the slightly different angles of the cup and cone raceways, a small resultant force also develops between the roller ends and the large rib of the tapered bearing inner ring.

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