Double row deep groove ball bearings precision protection

Backing bearings installation should be preceded with gasoline or kerosene to clean and dry before use, and to ensure good lubrication, double row deep groove ball bearings are generally lubricated with grease, oil lubrication can be. Lubricated with grease should be used free of impurities, oxidation, rust and extreme pressure performance superior grease. Grease filling is bearing and tank volume of 30% -60%, not too much. With sealing structure of the double row deep groove ball bearing grease has been populated, the user can directly use, can no longer be cleaned.
Bearing installation, the bearing must be on the circumference of the ring face applying equal pressure, push the ferrule may not be a direct hit with a hammer prime tool bearing face, so as not to damage the bearings. In the case of a small amount of interference, it can be pressed at room temperature with sleeve bearing ring face, beating with a hammer sleeve, the sleeve will be pressed into the ring balanced. If large quantities of installation, can be used hydraulic press. Press-fitting, should ensure that outer end face and the housing shoulder, inner end face and the shaft shoulder pressed, does not allow a gap.
(A) measuring the shaft and the bearing hole size to determine with precision bearings, with the request as follows: take the inner ring and the shaft interference fit, the amount of interference 0 ~ +4 μm (at light load, high precision is 0) ; take the outer ring and the bearing bore clearance fit, clearance volume 0 ~ +6 μm (but in the free end bearings angular contact ball bearings, can also increase the gap); shaft and housing bore surface roundness error in 2μm or less, double- row deep groove ball bearings with spacer Parallelism in 2μm or less, the inner face of external shaft shoulder end of the beating in the 2μm the following; shoulder block bearing hole on the axis of the beating in the 4μm less; spindle inside the front cover side facing the axis beating at 4μm or less. Bearing
(2) fixed-end bearings on the shaft before installation: the double row deep groove ball bearings with clean kerosene cleaning thoroughly cleaned, for grease lubrication, the first containing 3% to 5% of the organic solvent injection bearing grease for degreasing After cleaning, then oil grease gun to fill quantitative bearing (bearing space volume accounted for 10% to 15%); heating bearings make heating 20 ~ 30 ℃, oil presses the bearing onto the shaft; be tight casing pressure on the shaft and in the appropriate pressure axial positioning it against the bearing face; would spring balance tape volumes in the bearing outer ring, with the measurement method of starting torque required preload check whether there is a significant change in (even if the double row deep groove ball bearing is correct, but as with the deformation of the cage or pre-load is also the possibility of a change).