Chrome-Plated Shafts

API 610 is intended for the petrochemical and gas industry which demand a high standard of integrity and reliability. You do not mention the other standard.

The reason for this particular requirement is to prevent the occurrence of wire wooling.

Wire wooling is not that common a phenomenon but it can be pretty severe. It is caused by a particle getting into the bearing and then by a process of localised heating the shaft material is transferred to the particle. It forms a hard (usually black) particle which starts to machine the shaft. The particle continues to grow etc..

What is machined off the shaft looks a bit like wire wool.

Now that you know what you are facing you could possibly decide for yourself, based on the industry you are in and or the local laws that prevail, which of the standards is a) valid for you or b) compulsory for you.

Thank you for the reply! The 140 ft/sec spec was from a company's internal standard which was made based their experience in use. It is difficult to verify if it is good for use now. So I wanted to see if somebody has similar experience or did tests on it. I appreciate your help on this.