Bearing Accuracy Grades case study

timer Asked: Feb 10th, 2014

Question description

Located in the beautiful city-Hong Kong,FANADE Industry(HongKong) Ltd has developed into a large-scare trading company of FAG Bearings By FANADE with the advantage of its convenient coastal transportation and abundant geographical advantage.FANADE Industry has operated in human-based management measures and provided customers with the premium service.Their business line includes Deep groove ball bearings,self-aligning ball bearings,thrust ball bearings,angular contact ball bearings,tapered roller bearings,cylindrical roller bearings,spherical roll bearings(FANADE Bearing Seals Type include:RS,2RS,Z,2Z,2RZ,DDU,LLU,VV.Bearing Row:Single-Row,Double-Row,Four-Row) etc with imported and domestic famous brands including Swedish SKF bearings,German FAG,INA bearings,Japanese NSK bearings,Japanese NTN bearings,Japanese KOYO,FYH bearings,Japanese IKO bearings,American TIMKEN bearings,Britain RHP and other famous imported bearings.FANADE Bearing website provide Structure、Dimensions、Net Weight and all Parameter and Details of all kind of bearings.Here we'd like to talk about The selected bearing accuracy grades.

According to different needs; Each bearing manufacturers have supply different accuracy requirements of the product; Below is some information about bearing

Analysis of the precision grade

The precision of the rolling bearing first divided into: dimension accuracy and rotation accuracy.

Bearing precision grade specification for; Divided into a level 0, 6 x, 6, 5, 4, 2 levels of six grades.

Bearing precision progressive progress at level 0; About the level 0 is usually meet; But when used for other conditions or situations;

The accuracy of demand level 5 or higher.

Above precision grade albeit with ISO standard as a benchmark for; But the title is different in the national standard

Accuracy of the scale of the bearing (shaft and shell device related project)

1, inner diameter, outer diameter, width, and installation of the width of the promised to error

2, the roller group within the last contact last contact outside diameter and the diameter of the promised to error

3, promised to limit value of the chamfer dimension

4 and the change of width of the promised quantity

The rotating precision of bearing (project) associated with rotator to beat

1, inner ring and outer ring of the promised to radial runout and axial runout

2, inner ring's promise to lateral jitter

3, the outer diameter surface promised to change the amount of skew

4, the thickness of the thrust bearing raceway promised to change quantity

5, cone hole promised error and promised to change the amount

Most cases using usually measure accuracy and rotation accuracy FAG bearing (public service level for the PN) is fulfilled. When the demand is higher; The precision of bearing demand a higher level; Such as spindle bearing. In order to reach the demand of the higher precision; Specification rules the P6, P6X, P5, P2 and P4 level of public servants. FAG in accordance with company specifications for some special rules for bearing P4S, SP and the UP level public service.

Presents no neutral in machining shaft neck looks or bearing cooperation they work; Looks especially cooperation processing is not in a pack of CARDS in the end. Use of bearing seat will also attack is wrong; Such as flange or vertical bearing FAG bearing imports. Because of homework load deformation of winding shaft attacks; From and incur when bearing inner and outer circle skewed; Can also be present in the wrong.

Self-aligning SKF bearing to be right and skew counter; For example, peng roller bearings, self-aligning ball bearing radial and thrust spherical roller bearings. This kind of bearing has a concave spherical outer ring raceway, Rolling body and inner ring can rotate inside. These bearing counter shaft centerline deflection Angle can depend on the type of their own, scale economics and load conditions.

Spherical bearing and outdide circle of SKF thrust ball bearing has a spherical bearing surface, the device in the hollow spherical seat to adjust the counter deflection Angle.

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