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Cross roller Bearing FAQS

QWhat is Four-point contact Bearing?

AFour-point contact ball bearing is a kind of separate bearing, it can also be said that a set of bearings can withstand the bidirectional axial load of the angular contact ball bearing. The inner and outer ring raceways are the sections of the peach type. When there is no load or pure radial load, the steel ball and the ring appear as four points of contact. This is also the origin of this name.

QWhat is the application of slewing bearing?

ARotary bearing is a kind of large bearing with special structure, which can withstand large axial load, radial load and overturning moment at the same time. Under normal circumstances, the turntable bearings themselves are equipped with installation holes, lubricants and sealing devices, which can meet the different needs of various types of hosts operating under different working conditions. On the other hand, the turntable bearing itself has the characteristics of compact structure, convenient steering rotation, simple installation and easy maintenance. It is widely used in large rotary devices such as lifting and transportation machinery, excavation machines, construction engineering machinery, port machinery, wind power generation, medical equipment, radar and missile launchers.

QWhat are the principles of turntable bearings?

ARotary bearings are generally equipped with mounting holes, inner or outer gears, lubricating holes, and sealing devices, thus making the design of the host compact, simple to guide, and easy to maintain. The turntable bearings have four series of four-point contact ball bearings with no teeth, outer teeth and inner teeth, double-row contact ball bearings with cross-cylindrical roller bearings, cross-conical roller bearings, and three-row cylindrical roller composite bearings. The four-point contact ball bearing has higher static load capacity, the cross-cylindrical roller has higher dynamic load ability, and the pre-surplus of the cross-cone roller bearing can make the bearing have greater support stiffness and rotary accuracy. The three-row cylindrical roller combined bearing leads to the bearing height due to the increase in carrying capacity, and various forces are borne by different raceways. Therefore, under the same force, the bearing diameter can be greatly reduced. Therefore, the characteristics that make the host more compact are a kind of rotary bearing with high bearing capacity.

QWhat is the bearing Bearing clearance?

ABearing clearance is the gap between the rolling body of the bearing and the outer and outer ring shell of the bearing. The so-called bearing clearance refers to the shift of the bearing when the bearing is not installed on the shaft or bearing box, and the inner or outer ring of the bearing is fixed, and then the bearing clearance is not fixed by the side that moves radial or axial. According to the direction of movement, it can be divided into radial clearance and axial clearance. The size of the clearance during operation(called working clearance) has an impact on the rolling fatigue life, temperature rise, noise, vibration and other properties of the bearing.