In fact, the NTN import bearing in the majority application situation, simultaneously withstands the radial direction and the axial load frequently, because, when carries on the bearing life computation, must the actual load transform with fixed moves the load the load premise consistent true equivalent to move the load.Warm crossed high, meets the bearing to have the annealing, reduces NTN to import the bearing the mechanical function; Warm crossed lowly, the heat expansion value is insufficient, difficulty with assembles.The radial direction equivalent moves the load refers to the constant radial direction load.
Replaces the bearing most common method to have two kinds: One kind is imports the bearing direct warming with the acetylene oxygen steam to NTN; Another kind is uses the oil bath warming to the small bearing, achieves the thermal expansion, expands the bearing inside diameter, in order to assemble.These methods obtained the widespread application in the long-term equipment service, was content basically and has solved the equipment service middle bearing assembly topic.The axial equivalent moves the load is a constant central committee axial load, under this load function, moves the bearing to have with the actual load function same life.But these two methods to guaranteed whether the bearing in the warming process the heating area temperature value average, very difficult to determine.Because the traditional acetylene oxygen steam heating all is Shan Qiyan the mouth, moreover heats up the process only depends on the experience, the bearing temperature which heats up is added to how many appropriate very difficult assurances.Because in the equipment repair, the dresser is sometimes insufficient to the bearing warming, the NTN import bearing does not install in the accurate position, has to be compelled to take down the rewiring, thus increased the labor intensity.
(1) reduces the oil quality steam as far as possible the soakage
The (1)NTN import bearing oil quality storehouse must maintain good ventilating.Enters in front of the clean oil storehouse work, should open the window gate first, after lets the oil quality steam dissipate as far as possible only then enters the storehouse work.
(2) oil pot, the fuel tank, the pipeline, the oil pump and refuel the equipment and so on to have to maintain strictly leakproof, if the discovery leakage phenomenon should service promptly, and the thorough collection and the elimination leaks the oil quality which sprinkles, the NTN import bearing avoids the oil quality producing the steam, the aggravation operation area spatial steam pollution. 
(3) enters the light oil pot, the ships oil tank work, must open the human hole to ventilate beforehand, and the clothing has the ventilation installation anti-poison equipment, but also must be joined to the safety belt and the signal rope.When operation, must have the specialist outside the pot to be on duty, in order to the operator relates as necessary with the pot in, and takes turns the work.
(4) sweeps clear the steam, the petroleum oil delivery truck and other small vessel -odd oil, forbid strictlys the staff entering in the pot to operate, when sweeps clear other -odd oils must enter the pot, should take the effective security measure. 
(5) carries on the light oil work, the operator must certainly stand in the uptake position, reduces the oil steam inspiration as far as possible.
(6) oil quality quality adjustment work place, must install the row of wind installment, in order to avoid produces the massive oil steam in the heating and the agitation process, harm operator health.
2. avoids the oral cavity and the skin and the oil quality contact
(1) forbid strictlys with the mouth attracting the leaded gas or other oil qualities, the NTN import bearing if must extract from the fuel tank through the rubber tube the gasoline time, the available rubber ball or pumps the equipment to attract.
After   (2) work finished, must use the lye or the soap washes the hands, after has not washed the hands, washes the face, rinses mouth do not have to smoke, the potable water and the feed.
(3) forbid strictlys with the leaded gas washing the hands, scouring clothes, the part, pours into the cigarette lighter or makes the blow lamp fuel.
(4) do not have to moisten has the greasy dirt, the oily dirt work clothes, the glove, the shoes and socks takes into the cafeteria and the dormitory, should put in the changing room which assigns, and regular clean.



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