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A bearing is a mechanical unit that provides a mobile link between two parts that rotate in relation to one another. Its function is to permit relative rotation of these parts, under load, with accuracy and minimum friction.

A bearing consists of:

• Two rings, one associated with a fixed element, the other with the moving element and featuring raceways

• Rolling elements allowing relative displacement of the two rings with minimum friction

• A cage separating the rolling elements

There are two large bearing families:

• Ball bearings, allowing high speeds of rotation and where the ball-raceway interface is theoretically point contact

• Roller bearings, where the ball-raceway interface is theoretically line contact. Roller bearings can withstand higher radial loads than ball bearings

NDE FLAW TECHNOLOGIES PVT. LTD. efforts in assuring quality begin with the raw material. NDE FLAW TECHNOLOGIES PVT. LTD works in cooperation with its suppliers to ensure that all purchased raw materials meet NDE FLAW TECHNOLOGIES PVT. LTD requirements. Automated, 100% in-line Non-Destructive Testing is an important part of these requirements.

The vast majority of Non-Destructive Testing inspections at NDE FLAW TECHNOLOGIES PVT. LTD is performed throughout the manufacturing process. NDE FLAW TECHNOLOGIES PVT. LTD follows all relevant industrial norms prescribed in industries where NDE FLAW TECHNOLOGIES PVT. LTD bearings are used, such as the aerospace and railway industries. Driven by customer needs for increased reliability, NDT is being increasingly requested by other industries such as automotive and renewable energy. NDE FLAW TECHNOLOGIES PVT. LTD has its own criteria for bearings used in wind turbines.

Bearings that have been in service or endurance-tested in a test rig may be examined by various NDT methods. This is to provide more insight into the root cause of bearing failure and bearing degradation mechanisms or, in the case of bearing remanufacturing inspection, to check for subsurface damage and see if the bearing component is fit for further service. At NDE FLAW TECHNOLOGIES PVT. LTD, NDT method is used to detect subsurface fatigue cracks as part of such failure investigations. After sectioning and microscope examination, ultrasonic signals can be correlated to the actual subsurface damage found.

All NDT methods are statistical in nature, and their ability to detect defects must be described probabilistically. Consequently, there are no certainties in NDT, only probabilities. In addition to the probability of detecting an existing defect, the probability of generating indications where there are no defects (i.e., false reject) and the probability of not detecting an existing defect (i.e., false accept) must be considered. The reliability of an NDT method can be expressed as a quantitative statistical measure of the ability, under given circumstances, to detect defects of a specific size in a defined part. Reliability of the NDT method depends on a number of factors, including equipment capability and operator skills.


To ensure access to the latest developments in the field of NDT, NDE FLAW TECHNOLOGIES PVT. LTD continuously evaluates opportunities for collaboration with the best universities, institutes and suppliers like international industrial companies representing oil and gas, aerospace, nuclear and manufacturing sectors.

NDE FLAW TECHNOLOGIES PVT. LTD has also recently signed a membership agreement with NBC. This center supports NDE FLAW TECHNOLOGIES PVT. LTD with developments in manufacturing and remanufacturing technologies at technology readiness levels, i.e., demonstrating new technologies in a relevant environment. Development of non-destructive technologies for product verification of remanufactured components and manufacturing inspection is core strength of this center.

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