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While all bearings are extremely precise mechanisms, a designer must consider the benefits of tighter tolerances in terms of performance and bearing life. For example, there is a direct correlation with precision class and bearing life. Raceway parallelism, a feature controlled by ABEC, can impact bearing torque. A non-parallel raceway will result in torque spikes. In high speed applications, bearing runout can result in an imbalance in the rotating mass. These conditions can lead to premature failure and unpredictable life. Of course, the higher precision levels have the downside of higher cost.

While the bearing tolerance classes primarily control boundary dimensions of the rings, it should also be noted that there are features that are critical to the bearings performance and life that are not controlled by the ABEC (or ISO) specifications. These include: internal clearance, surface finish, ball accuracy, torque, noise, cage type, and lubrication. These items should be specified along with the precision class when selecting [abec 11 bearings] to ensure optimum life and performance. In many cases, it is one of these features, not precision level, that when specified properly yields the desired performance and or life.

High quality and Speed Midwest Handpiece Dental Bearing ABEC 11 Bearings that fits most of the Midwest Handpiece applications. bearing is closed from one side and it is Stainless Steel bearing with solid SI3N4 Ceramic Balls, bearing is one side Metal shield, Bearing is made of Stainless Steel and has Solid Ceramic balls Si3N4 (Silicon Nitride), the cage is made of Torlon for lowest fricion and highest speed. Many people have asked me questions regarding the ABEC scale and how to buy bearings, so I have created this guide. It explains the meaning of ABEC and helps you decide what fag bearings to buy.

Bearings rated under the abec system are typically called ''precision bearings'', and they are rated with a number from 1 to 9, with the higher number assigned to bearings manufactured against a higher standard of precision.as the ABEC rating increases the standard of manufacture increases. In the case of skate bearings the most popular grades are abec 5 bearings and abec 11 bearings. The grades do not necessarily affect speed.

As I said before the most popular bearings with skaters are abec 5 and abec 11 bearings. This is mainly because of the quality of the bearing and the thought that you are going to be able to reach faster speeds.Factors affecting speed are mainly the type of material and the lubrication oils used. In my bearing auctions I have two main types of abec 11 bearings. Both are abec 11, yet they both have different maximum speeds. (The maximum speeds are shown in the items' descriptions) The different speeds are due to the different maerials used.

If you want high speed then I would advise getting well lubricated bearings, but also get high rated koyo bearings as these are made better, so will be less likely to fall apart.You will also find that as ABEC rating increases, price will generally increase