In many cases, however, several factors have to be considered and weighted against each other when selecting bearings types, so that no general rules can be given.

A comprehensive overview of the standard bearings types, their design characteristics and their suitability for the demands placed on a given application can be found in the matrix.

Detailed information on the individual nsk bearings types, including their characteristics and the available designs, can be found in the sections dealing with individual bearing types. Bearing types that are not included in the matrix are generally only used for a few well-defined applications.

The matrix permits only a relatively superficial classification of bearings types. The limited number of symbols does not allow an exact differentiation and some properties do not depend solely on bearing design. For example, the stiffness of an arrangement incorporating angular contact ball bearings or tapered roller bearings also depends on the applied preload and the operating speed which is influenced by the precision of the bearing and its associated components as well as by the cage design. In spite of its limitations, the matrix should enable an appropriate choice of bearing type to be made. It should also be considered that the total cost of a bearing arrangement and inventory considerations could also influence the final choice.

And if you zoom-in on this bearing, you can actually see it's got a little groove in it if you compare it to this one. Because of that little groove, the string can actually sit right down into that bearing and what that allows you to do is it allows the string to sit there and it won't get caught by the edge of the yo-yo quite as well and it also centers it so when you're doing tricks on the string, the yo-yo moves to one side or the other. It's not going to as quickly grab the edge of the yo-yo. It's going to be centered there. It allows you to do tricks at much longer time, allows everything to keep smooth and what not. 

So those are your basic types of bearings. You can also get different ABEC ratings, there's ABEC five and seven just kinda like skateboards. There's even ceramic nachi  bearings. Ceramic bearings spin for an incredibly long time, it's not incredibly needed though. If you just get your basic ball bearing with your yo-yo, it should be enough and with a little lube and cleaning which we're going to be talking about in the next segment, you can make it play as good as it needs to be.

With help of the program "Design/performance search", bearing designs can quickly be found and the performances of different bearings types can be compared.

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Z9514

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