Angular contact ball bearings can support radial and axial loads. Able to work at higher speeds. The contact angle, the higher the axial load carrying capacity. Single row angular contact ball bearings can withstand axial load in one direction, while the radial load, will cause additional axial force. And the only limit axial displacement in one direction, the shaft or housing. If paired installation, so that one pair of self aligning ball bearing outer ring relative to that wide side face of wide and narrow side facing the narrow end. This can avoid additional axial force, and the shaft or housing to limit the axial clearance range in both directions.
Angular contact ball bearing raceway for its inner and outer rings relative displacement on the horizontal axis, so it can bear radial load and axial load - combined load (single row angular contact ball bearings can withstand axial load in one direction, So often adopted installed in pairs). Cage made of brass, synthetic resins, etc., depending on the bearing forms, and application conditions.
Precision angular contact ball bearings problem
There precision angular contact bearings and precision has a very hit no difference
(1) bearing - shaft assembly seat hole mount
Heated seat hole so heated 20 ~ 30 ℃, with a continuous gentle pressure to the bearing - shaft assembly mounted seat hole; before adjusting cover, tighten the amount of the front cover of 0.02 ~ 0.05μm, the dial gauge positioning shaft, the first table inconsistent backseat hole surface, the axis of rotation of the front and rear seats to measure the bearing bore concentricity. In the end face of the outer bearing as a benchmark indicator of the conflict in the journal header surface, measuring the rotation of the shaft runout, requiring error 10μm or less.
(2) measuring the shaft and the four point contact ball slewing bearing hole size to determine with precision bearings, with the following requirements:Take the inner ring interference fit with the shaft, the amount of interference 0 ~ + 4μm (at light load, when high precision is 0); the outer ring and the bearing hole to take a clearance fit, clearance volume 0 ~ + 6μm (but at the free end of the bearing When using angular contact ball bearings, but also increase the gap); the shaft and housing bore surface roundness error of 2μm or less parallel to the end face of the bearing spacer to be used in the 2μm or less, and the inner end face of the external end face of the shaft shoulder beating 2μm or less; retaining shoulder of the housing bore axis beating 4μm or less; cover the face before the end of the axis of the spindle runout at 4μm or less.
(3) the free end of the bearing may be selectively placed in a position to offset the bias, the position of the rear bearing support mounted to the housing, as far as possible offset roundness and concentricity deviation offset each other.
(4) a fixed end miniature ball bearings
Heating bearings so that temperature 20 ~ 30 ℃, oil press the bearing onto the shaft; the tight sets against the shaft and bearing an appropriate pressure against the end face axially positioned; the spring balance tape volume in the bearing outer ring on whether the pre-load starting torque measuring method stipulated verify a substantial change (even if the bearings are correct, but due to meet or maintain the deformed frame, pre-load is also likely to change). After the bearings were cleaned thoroughly washed with clean kerosene, grease lubrication, the first containing 3% to 5% of the grease into the bearing organic solvents for degreasing, then quantitative grease gun oil filled bearings (accounting bearing space volume of 10% to 15%).
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