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KOYO bearing FAQS

QWhat is Automotive Seals?

AEngineered for long-lasting protection and high performance, automotive seals feature precision sealing designs and fit many light and commercial vehicle applications.

QWhat is Rail Seals?

AFrom the creator of the industry-leading AP™ and AP-2™ bearings comes a complete line of seals devoted to contamination prevention in rail applications.

QWhat is the tapered roller bearing’s most important dimensions?

AThe tapered roller bearing’s most important dimensions are: • The outside diameter of the outer ring, or cup, is known as the O.D. (D). The other basic dimension of this part is the cup width (C). Both are important for fitting the bearing onto the housing. • The inside diameter of the inner ring, or cone is called the bore (d). This diameter must be correct in order to fit the bearing onto the shaft. The other basic dimension of this part is the cone width (B). • When cup and cone are mated (including rollers and cage), the overall dimension is called the overall bearing width (T).

QHow to tapered roller bearings minimize friction?

ATapered roller bearings minimize friction because of the interrelationship of the bearing’s four basic parts: • The inner ring, or cone, is mounted onto the shaft. • The outer ring, or cup, sits in the housing (hub). • The tapered rollers, or rolling elements, allow relative motion between the cone and cup thus minimizing friction between the two. • The cage, or separator, spaces and holds the rolling elements in the proper position. • The races are the surfaces on the cup and cone where the rolling elements make contact