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Bearing accuracy grade and differentiation specification
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Bearing precision bearing accuracy grade and distinguishing specification of rolling bearing accuracy (primary) scale accuracy and rotation accuracy. Accuracy grade has been standardized; divided into 0 grade, 6X grade, 6 grade, 5 grade, 4 grade, 2 grade 6 grades. Accuracy progresses from level 0; it is satisfied with the usual use level 0; but when used for other conditions or occasions; requires level 5 or higher accuracy.
The above accuracy grades are based on the ISO specification; however, their titles differ in national specifications.
Scale accuracy (items related to shaft and housing units)
1. The tolerance of the inner diameter, the outer diameter, the width and the installation width, the tolerance of the complex circle diameter and the diameter of the outer complex circle in the roller group, the allowable limit value of the chamfering scale, and the tolerance of the width of the rotation. Project related to the rotation of the rotating body)
1. The inner ring and the outer ring allow the radial runout and the axial runout. 2. The inner ring allows the lateral runout. 3. The allowable variation of the outer diameter surface inclination. 4. The allowable variation of the thrust bearing raceway thickness. 5. The tapered hole. Acceptance error and allowable variation
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