Wheel of ntn bearing application notes

ntn bearings bearing clearance i.e. import is not installed on the shaft or bearing housing when the inner or outer side fixed, then it is not fixed, and either the radial or axial movement of traffic moving. Under the direction of movement can be divided into radial clearance and axial clearance.
Running time of clearance (known as work clearance) the size of the imported bearings rolling fatigue life, temperature, noise, vibration and other properties affected.
Measurement ntn bearing clearance, in order to obtain stable measurements, the general provisions of the measure imposed on the bearing load. Therefore, measurements obtained clearance than the real (known as theory of clearance) large, an increase of load generated by measuring elastic deformation.
But ntn bearing in roller bearings, because of the relatively small amount of elastic deformation can be ignored.
In some high-end bicycle manufacturers bicycle is to use ntn bearings. Than with a set of bearings bearing block type structure is much better bowl, but the much higher cost. Structures such as retaining bowl bearing the cost of a corner, however much money, and sets of bearings at least be more than the cost of a dollar.
The use of common sets of ntn bearing load carrying capacity and bowl with a block-type structure is similar bearing, the bearing block type structure, although the bowl is plain carbon steel with a chrome ball, but filled with the exact design; general Although the complete set of bearings used in high-chromium bearing steel ball, but the number of small steel balls, spaced by the cage, so as to achieve higher speeds.
Relatively high carbon steel ball chrome steel ball bearings for the much shorter life span. Wear resistance of carbon steel ball, ability to withstand shocks to be inferior to steel ball bearings. The other set of bearings with the cage, cage ball only with friction. While retaining bowl filled ball-type ball bearing structure with friction between. Therefore, the block bearing bowl-type structure or as durable and easy to use set of bearings.
To know that bicycle manufacturers make several hundred million bicycles a year, and a bicycle to use at least six deep groove ball bearing type structures. If by six dollars per bike cost, then spend the year how much cost?
Bike manufacturers to consider the overall cost, by the way we are all, ordinary block type bowl with a steel ball bearings are common steel and hard chrome plated. ntn ball bearings in use, are bearing special steel of high chromium steel, there is only the price of two very different ball.