The installation of NTN import bearing will affect the precision, life and performance of NTN import bearing.Therefore, please fully study the installation of THE NTN import bearing, that is, please install the NTN import bearing according to the following operating standards.
1. Clean the NTN import bearing and related parts (for the greased NTN import bearing and both sides with oil seal or dust cover, the sealing ring need not be cleaned before installation of NTN import bearing.)
2. Check the dimensions and finishing of relevant parts
3. Installation method
The installation of NTN import bearing shall be determined according to the structure, size and mating nature of THE NTN import bearing components. The pressure shall be directly added on the end face of the tightly fitting ring, and the pressure shall not be transferred through the rolling body. The installation of NTN import bearing generally adopts the following method:
A. Press fit
NTN import bearing inner ring and shaft tight fit, outer ring and NTN import bearing hole is a loose fit, available press will NTN import bearings to be pressed on the shaft, then axial load along with NTN import bearings NTN import bearing hole, when pressed on imports NTN bearing inner ring end face, cushion the assembling casing made of a soft metal materials (copper or mild steel).
When the outer ring of the NTN inlet bearing fits tightly with the bearing seat hole, and the inner ring fits loosely with the shaft, the NTN inlet bearing can be first pressed into the BEARING seat hole of the NTN inlet. At this time, the outer diameter of the assembling casing shall be slightly smaller than the diameter of the bearing hole.
If the NTN inlet bearing ring is closely matched with the shaft and seat hole, the installation chamber ring and outer ring should be pressed into the shaft and seat hole at the same time, and the structure of the sleeve assembly should be able to tighten the end face of the NTN inlet bearing ring and outer ring at the same time.
B. Heating fit
By heating the NTN inlet bearing or THE NTN inlet bearing pedestal, the installation method of converting tight fit into loose fit by thermal expansion.Is a common and labor-saving installation method.This method is suitable for interference quantity larger the installation of the NTN import bearings, hot charging before the NTN bearing type or separable NTN import bearing ring into the tank of uniform heating in the 80-100 ℃, and then loaded on the shaft, as soon as possible out of the oil to prevent inner ring after cooling end face and the shoulder joint is not tight, NTN import bearings after cooling can be axial tighten again.When the outer ring of THE NTN inlet bearing is tightly matched with the NTN inlet bearing seat made of light metal, the hot loading method of heating the NTN inlet bearing seat is adopted to avoid the abrasion of the mating surface.
Tank heating NTN import bearings, due at a certain distance from the bottom of a mesh, or hanging hooks in the NTN import bearings, NTN import bearings can not on the bottom, in case of heavy impurities into the NTN import bearings or uneven heating, fuel tank must have a thermometer, strictly control the oil temperature shall not exceed 100 ℃, in order to prevent the tempering effect, reduce the hardness of the ring.