The role of double-row deep groove ball bearings with NSK Bearings still rings and rotations were still part of the installation position (usually bearing) and the rotating part (usually the shaft) consolidation together in order to achieve the rotation stateunder passing loads and limit movement relative to the stationary system the location of the basic tasks.
Shaft and bearing, NSK bearing requirements in three directions, radial, axial and tangential direction is fixed in its position. Radial and tangential orientation by the tight fit of the double row deep groove ball bearing rings adopt to achieve the axial position only in rare cases, a tight fit; and the general axial spacing parts, such as end cap and retaining ring the axial position is limited within the range of clearance.
Double row deep groove ball bearings shaft diameter and bearing direct contact with the prevent the occurrence of adhesion and the formation of the boundary lubrication performance. Compatibility of materials of the impact of Friction factors are:
(1) as vice Materials and Metallurgy, constitute the degree of difficulty of the alloy.
(2) the affinity and capacity of the materials and lubricants.
(3) into a pair materials state without lubrication, the friction factor.
(4) The microstructure of the material.
(5) the thermal conductivity.
(6) the size of the surface oxide film characteristics.
The oil pump high pressure oil through the nozzle hitting the bearing, launched into the NSK Bearings, oil the bearings of the other end into the tank. Bearing the high-speed rotation, the rolling element and cage around the air with a very high rotational speed the formation of air flow, difficult to use the general method of lubrication the lubricant to the NSK Bearings, when the lubricating oil must be high-pressure injection method spray to double row deep groove ball bearings, the position of the nozzle should be placed on the inner ring and between the cage center.
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