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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>NSK bearing device cooperation method NSK bearing device cooperation method
Whether the NSK bearing device is good or bad; will affect the accuracy, life and function of the NSK bearing. Therefore, please fully study the NSK bearing device; that is, please follow the operation specifications including the following items for the NSK bearing device. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
1. Remove NSK bearings and associated parts; (for NSK bearings and double-sided oil seals or dust caps that are now grease-smooth; there is no need to remove the NSK bearing assembly before sealing.)
2, to view the scale of the related parts and finishing conditions 3, device approach NSK bearing device should be based on NSK bearing layout; scale size and NSK bearing components of the cooperative nature; pressure should be directly added to the tight end face of the ferrule; The pressure must not be transmitted through the roll body; NSK bearing devices usually use the following methods:
a. The inner ring of the NSK bearing is pressed into cooperation with the shaft to ensure tight cooperation; when the outer ring and the NSK bearing seat hole are loosely cooperative; the NSK bearing can be press-fitted on the shaft by the press; then the shaft is loaded into the NSK bearing together with the NSK bearing. Inside the seat hole; press-fit on the end face of the inner ring of the NSK bearing; pad a device sleeve made of soft metal material (copper or mild steel).
NSK bearing outer ring and NSK bearing seat hole tight cooperation; inner ring and shaft are looser cooperation; NSK bearing can be pressed into NSK bearing seat hole first; then the outer diameter of the device casing should be slightly smaller than the diameter of the seat hole .
If the NSK bearing ring is tightly engaged with the shaft and the seat hole; the inner ring and the outer ring of the device should be pressed together into the shaft and the seat hole; the layout of the device bushing should be able to tightly close the end faces of the inner and outer rings of the NSK bearing. .
b. Heating cooperation through heating NSK bearing or NSK bearing seat; using thermal expansion to transform tight cooperation into loose cooperation device method. It is a common and labor-saving device method. This method is suitable for NSK bearing devices with large interference; heat Put the NSK bearing or the detachable NSK bearing ferrule into the fuel tank and heat it evenly 80-100 °C before loading; then remove it from the oil and load it on the shaft; to avoid the inner ring end face and the shoulder joint not tight after cooling After the NSK bearing is cooled, it can be axially tightened. When the outer ring of the NSK bearing is tightly coupled with the light metal NSK bearing seat; the hot-packing method of heating the NSK bearing seat is adopted; the cooperating surface can be prevented from being scratched.
When heating the NSK bearing with the fuel tank; there should be a grid at a certain distance from the bottom of the tank; perhaps the NSK bearing is hung with a hook; the NSK bearing cannot be placed on the bottom of the tank; to prevent the sinking of impurities into the NSK bearing or uneven heating; Must have a thermometer; strictly control the oil temperature must not exceed 100 ° C; to avoid the tempering effect; make the hardness of the ferrule down.
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Source: China Bearing Network Time: 2017-10-08