Knowledge of angular contact ball bearings

First, the process planning principles:

1, the quality principles. Must be processed according to the process of the final product quality to meet the requirements of the relevant drawings or documents.

 2, the benefit principle. Consider the production arrangement to facilitate and enhance productivity and so on.

 3, the economic principles. Meet the requirements of the premise, considering the possibility of reducing costs.

 4, taking into account the operator's labor intensity, and environmental protection.

Second, the process of the preparation of the basic steps:

 A familiar figure and related products enterprise standards and national standards and customer requirements.

 2, to understand the various requirements of rough drawings.

 3, the proposed process route, select Positioning benchmarks and installation.

 4 Select allowance, calculated step size to determine the conditions and test methods.

 5, to determine each step processing equipment. Process is determined, you must first process test, verify its correctness, rationality, economy and so on. Meanwhile, the process has a temporary and relative, production processes used will change because of some objective conditions necessary to make the appropriate adjustments.

 Three, angular contact ball bearing Basics:

1, the contact angle: the rolling element and raceway contact points or the midpoint of the line of contact with the radial tangent plane angle. A

There are two different kinds of bearings can contact angle (such as tapered roller bearings), the general said contact angle refers to the external antennae.

 Angular contact ball bearings can withstand radial and axial load, but also can withstand pure axial load. As the contact angle increases,

It can withstand axial load increases. High speed limit.

 The same dimensions, sometimes depending on the required load bearing different, can be designed to be non-loaded ball gap and the ball gap two kinds. There ball gap can hold more of the ball, can withstand greater loads, but using lower speed. There is also a relatively unique double row angular contact ball bearings, the so-called first generation wheel hub bearing, there are two inner ring and an outer ring.

2, angular contact ball bearings precision. Is divided into five,

0,6,5,4,2-level, followed by level from low to high. General Bearing logo on the back, preceded by the letters P, and use the "/" separated, such as 7203C/P4, but not marked P0 stage omitted. Different accuracy levels have different sizes and rotation precision tolerances, the higher the level, the higher the finished product required, thus the component parts of the various requirements are also higher.

 3 clearance. Four-point contact ball bearings and double row angular contact ball bearing axial clearance required national standards. Four-point contact ball bearing axial clearance points

C2, C0, C3, C4 four groups, double row angular contact ball bearing axial clearance of C2, C0, C3 three groups, C2 smallest group, C0 group does not identify the product. There are also some clearance requirements may not be assembled according to the national standard,

Mainly based on customer specific requirements adoption. Single row angular contact ball bearing clearance is no uniform requirement, but to control the contact angle tolerances, product drawing generally marked radial clearance requirements.