What is ISO 7902‑2 standard about?
ISO 7902‑2 is the second part of a series of documents on cylindrical bearings. ISO 7902‑2 specifies the values of the basic functions used in the calculation procedure for oil-lubricated circular cylindrical hydrodynamic bearings under conditions of full lubrication.
The values are given for the assumptions and boundary conditions given in ISO 7902‑1. The values necessary for the calculation can be determined from the tables of bearing characteristics, the graphs and from the formulae.
The descriptions of the symbols used and calculation examples are given in ISO 7902‑1.
Who is ISO 7902‑2 standard for?
ISO 7902‑2 on the circular cylindrical bearings is relevant to:
- Manufacturer of hydrodynamic plain journal bearings
- Suppliers and customers of hydrodynamic plain journal bearings
- Mechanical engineer
- Mechanical drafters
Why should you use ISO 7902‑2 standard?
Hydrodynamic journal bearing is a bearing operating with hydrodynamic lubrication, in which the bearing surface is separated from the journal surface by a lubricant film generated by the journal rotation
ISO 7902‑2 provide information on tables of basic bearing characteristics, graphs of basic bearing characteristics, friction power loss, lubricant flow rate resulting from feed pressure, effective dynamic viscosity, ηeff, of the lubricant as a function of effective bearing temperature, teff of oil-lubricated circular cylindrical hydrodynamic bearings
As a buyer of ISO 7902‑2, you can be ensured of all the functions used in the calculation procedure required to design and operate oil-lubricated circular cylindrical hydrodynamic plain bearings. ISO 7902‑2 helps you in manufacturing high-quality hydrodynamic plain bearings. With the necessary guidance and compliance to ISO 7902‑2, the user can improve the quality and operation of oil-lubricated hydrodynamic plain bearings.
What’s changed since the last update?
BS ISO 7902‑2:2020 supersedes BS ISO 7902‑2:1998, which is withdrawn.
The changes compared to the previous edition are as follows:
- Adjustment to ISO/IEC Directives, Part 2:2018;
- Correction of typographical errors.
