Tapered roller bearings, as the name implies, consists of tapered inner and outer ring raceways, respectively known as the cone and cup. Along with tapered rollers and a roller retainer (also referred to as a cage), these four components combine to withstand both radial and axial loads. Tapered roller bearings are so versatile and durable precisely because they are the only bearings that are able to withstand loads in both directions.
Tapered Roller Bearing Applications
Tapered roller bearings are used in heavy duty applications that require durability, most notably in moderate speed, heavy duty vehicles such as construction vehicles and mining equipment. They are also used in railways, wind turbines, papermaking machinery and even motorcycles.
Types Of Tapered Roller Bearings
Tapered roller bearings come in many varieties, truly making them some of the most diverse bearings. However, the most common variations of tapered roller bearings are single row, double row, and four row tapered roller bearings.
Single row tapered roller bearings are the most widely used tapered bearings. They are separable, meaning that the cone and cup can be mounted separately for maximum flexibility. Like all tapered roller bearings, single row tapered roller bearings can withstand both axial and radial forces. However the capacity to withstand axial forces depends on the degree of the contact angle.
Double row tapered roller bearings are primarily used in gearboxes, tunnelling machines and hoisting equipment. As the name implies, double row tapered roller bearings have one double row outer ring and two sets of inner rings with rollers.
Four row tapered roller bearings have the advantage of being able to withstand much greater radial and axial forces than your standard roller bearings, making them the natural choice for roll neck areas in rolling mill bearing arrangements. Four row tapered bearings are also particularly cost effective because it negates the need for thrust bearings in these types of arrangements.
Tapered roller bearings have been an essential component to equipment that requires the support of both axial and radial loads since its invention in 1895 by American farmer and carpenter John Lincoln Scott.
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