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Talking about "What should be paid attention to when NSK bearing device"

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(1) When removing a lot of NSK bearings; first use hot oil with a temperature of 90-100 °C to melt the encapsulating oil; use a seamless mouth and do not throw things to dig all the old oil; then rinse for a few minutes; Then use kerosene to rinse the oil; finally remove it with gasoline. After cleaning, clean it; put the NSK bearing on a clean cloth on the workbench or dry it on paper.
(2) Before the NSK bearing device; the appropriate skill should be used to measure the skill requirements on the design drawings; view the machining quality of the shaft and the seat hole and related parts (such as dimensional accuracy, shape accuracy and appearance roughness).
(3) Open the NSK bearing package when the device is installed; immerse it in the above-mentioned gasoline and other liquids to gently change the hand; ensure the support Frame; the rolling oil and the outer surface of the raceway are completely cleaned.
(4) The surface of the device should be cleaned with a clean solution of gasoline, kerosene, toluene or xylene; and wiped with a clean rag; then coated with a thin layer of lubricant; this will make the device more convenient.
(5) Pay attention to the NSK bearing with seal can not be removed by this method; the inside of the seal should not be removed as it is.
(6) The presence of bumps, burrs, rust or solid particles (such as wear debris, sand, dirt) on the surface of the shaft and housing bore; not only makes the NSK bearing device difficult and the orientation of the device is incorrect; If the solid particles fall into the NSK bearing, it will have a grinding effect; when the NSK bearing rotates, it will wear or scratch the outer surface of the NSK bearing; therefore, it is necessary to carefully check it before the device; if any of the above defects are found; Correction. For example, use oil mites to remove burrs, bumps, rust spots; and use fine sand cloth to illuminate; as well as remove solid particles, dirt, etc.
1. Use copper rod and craft sniper device This is a simple way to install small and medium NSK bearings. When the inner ring of the bearing is tight cooperation; when the outer ring is loose, the copper rod is close to the end surface of the bearing inner ring; Directly tapping the copper rod; passing the force through the copper rod; slowly loading the bearing onto the shaft. When the inner ring of the bearing is large; the copper rod can be evenly tapped around the end surface of the inner ring of the bearing; avoid hitting only one side; Excessive force; to be symmetrical hit; quietly hit and gradually installed; avoid loading oblique cracking bearings.
2. Using the sleeve device This method is the same as the NSK bearing method of the copper rod device. It presses the sleeve directly on the bearing end face (the inner ring end face is pressed when the bearing is mounted on the shaft, and is pressed when mounted in the housing hole) Outer ring end face; the hammering force of the hand hammer can be evenly distributed on the end face of the bearing of the device; and can be used in cooperation with the press; the device saves labor and time; the quality is reliable. The sleeve used in the device should be soft metal Manufacture (both copper or low carbon steel pipe). If the bearing device is on the shaft; the inner diameter of the sleeve should be slightly larger than the journal 1-4mm; the outer diameter is slightly smaller than the diameter of the inner ring of the bearing; or the thickness of the sleeve; The thickness shall be made 2/3-4/5 of the thickness of the inner ring of the bearing; and the ends of the sleeve shall be flat and straight with the barrel. If the bearing device is in the seat hole; the outer diameter of the sleeve shall be slightly smaller than the outer diameter of the bearing.
3. There is also a press press method: the pressure of the device should be directly applied to the end face of the NSK bearing ring of the interference cooperation; otherwise, the crush will be formed on the outer surface of the bearing operation; the bearing will be damaged quickly.
4. The heating device is about NSK bearing or large-scale bearing with large interference of the device; for the convenience of the device; the principle of thermal expansion and contraction can be applied; the bearing is heated in the fuel tank and then used for copper rod, sleeve and hand hammer device. Usually controlled below 100 ° C; 80-90 ° C is more suitable. When the temperature is too high; easy to form bearing ring raceway and roll body annealing; affect hardness and wear resistance; lead to the decline in bearing life and prematurely invalid.

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