According to the structure of the bearing should be NTN, size and nature of the parts and bearings with and decide. Therefore, in the design and installation of assembly department fully research. Want to install according to the standard. This project task as follows: usually standards
 
In NTN bearing before installation, should use the appropriate measurement tools according to the design drawing the technical requirements of the regulation, check the shaft and a hole and the relevant parts processing quality (such as size accuracy, the shape accuracy and surface roughness, etc.).
 
Axis and the assembly of a hole on the surface such as a bruising, burr, rusty spot or solid particles, such as abrasive dust, dirt and sand) exist, not only can make NTN bearing in installation and make installation position is not correct, and solid particles such as fall into the bearings inside will work abrasive, when NTN bearing rotates will wear injury or a scratch bearing work surfaces, so before installing must be carefully checked, such as the discovery of the defect, be amended. For example using oil file to remove burr, convex touch the mark, rusty spot, and fine sand cloth lighting, and as cleaning solid particles, dirt, etc.
 
The assembly should be in a clean surface of gasoline, kerosene, toluene, xylene or cleaning solution clean, dry and clean duster cloth, besmear again putting a thin layer of oil, so can make installation operation more convenient.
 
NTN bearing inner circle axis is a tight fit, outer shell is loose and cooperate, can press will first being connected to the bearings in bearing, and then will shaft bearing load shell together with NTN, being connected in bearing on end when a soft cushion of metal material assembly casing (copper or soft steel tube). Assembly shall be the inner diameter of the casing pipe shaft neck slightly larger than the diameter, outer diameter of the inner diameter should be less than bearing raised edge diameter, lest the pressure in keep on the shelf. A large number of installation NTN bearing can add a handle on the casing.
 
NTN bearing inner circle axis, outer ring and shell holes are is a tight fit, assembly should make it can also face casing pressure bearing inside and outside the ring ring width, or with a disk and assembly casing, the pressure to the inside and outside the circle at the same time, the bearing pressure into the shaft and shell. This installation method is especially suitable for the can automatically adjustable heart to heart of spherical bearing installation.
 
NTN bearing outer ring and shell holes for a tight fit, inner circle for a loose shaft with, can be pressed into the first in the shell bearings, at this time of the casing pipe diameter assembly should be slightly smaller than the diameter of the shell holes.
 
Heating installation, hot charging NTN before bearing or separable bearing rings in the tank or heater for even heating to 80 ~ 100 ℃ (should not be more than 100 ℃).




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