Four row circular cone roller bearings: how did the skateboard bearing oiling

NSK bearings in the machinery is mainly ACTS as the role of support and reduce friction, so the accuracy of NSK bearings, noise is directly related to the use of machinery and longevity. Moistens the quality influence on bearing life bearing can long time reliable use without lubrication quality, rolling mill bearings in normal operation when subject to various friction, the outer ring raceway load area is under serious internal friction parts, oil bearing operation will exist in the process of the radial clearance, roller rolling will only in the problem of load area, this is the load section will be in a state of rolling and sliding, roller from the load section into the process of load area, roller speed will increase suddenly, in the process of speed jump, roller and raceway friction, at the same time also will inherit from the impact load in the process of steel rolling. Speed has a lot to do with ingot condensation, in this case, we must pay attention to the bearing ring fatigue fracture and overload fracture is likely to appear at the same time, especially the poor service condition of bearing ( Such as, etc. ) 。 Steel can be plating a variety of metal on the back, can be used in the corrosive medium; Currently has been widely applied to various mechanical sliding parts, others in order to improve the flexibility of sliding bearing sphere, the sphere of tile and tile seat contact area shrinkage of small, especially the middle groove sphere tile, only a tiny part of the contact, both sides of the groove, the friction will soar, does not favor the sphere of activity. To avoid ring, greater than Ymin - tracker Methyl amino acetonitrile computing ( mm） Must be not allowed beyond ring allows to calculate the type of intensity, [ δp] — — Allow the tensile stress, Pa, the tensile stress in the bearing steel [ δp] ≈×Pa; d— — The bearing inner ring diameter, m. : are the characteristics of polymer and can't afford to many chemical reactions, particularly strong ability to resist corrosion. Has the constant self lubrication, can work under the condition of no lubrication, lubrication capability under the condition of high temperature can be; Good embedded; Antifriction and wear resistance are good. Wear the ring raceway should choose fittings, the method of the ring raceway repair, inner ring raceway diameter decreased, outer ring raceway diameter increases, when you choose a large ball. Figure along the shaft of the induced voltage between shaft and bearing voltage & amp; emsp; & emsp; Choose time characteristic of the determinants of the insulation is current. Each segment has into the oil tank, oil directly discharge after working in the tile surface, has small power consumption, this structure is used in rigid rotor and the axial load is not too big unit. Bearing nominal width ( Bearing level) n - Methyl amino acetonitrile omin - Methyl amino acetonitrile albearin - Methyl amino acetonitrile gwidth ( bearin - Methyl amino acetonitrile gheight) Ring theory of two end face ( Washer on the back) The distance between the to limit the centripetal bearing width ( Thrust bearing level) 。 Then take the foregoing will keep the outer to the inner ring measures, in definite extent solved the problem, but because of axial load commutation problem not solve, so for a long time, in the various retrofit of RB B, C, D and DUpgrade, etc. ) , or the occasional slip of the bearing damage events. Choice: the lubricating oil pressure or work under impact, variable load condition, choose the high viscosity oil; Speed is high, should choose low viscosity oil, in order to reduce friction loss; Working at high temperature, choose the high viscosity of the oil, because of the viscosity with temperature rise will be reduced.