Is a magnet acting on a bearing detrimental?

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Discussion Overview

The discussion revolves around the effects of a magnet acting on a stainless steel bearing, specifically whether this interaction could have long-term detrimental effects on the bearing's performance and integrity. The context includes considerations of bearing types, lubrication, and potential wear mechanisms.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant notes that a powerful magnet causes drag on a stainless steel bearing and questions if this has long-term detrimental effects.
  • Another participant asks for clarification on the type of bearing involved, suggesting that the specific type can influence the discussion.
  • A participant describes the bearing as a deep groove, rubber sealed bearing and speculates about the lubrication forming a film that could be disrupted by the magnet's influence, potentially leading to wear.
  • One participant critiques the term "normal bearing" for lacking specificity and emphasizes the importance of detailed descriptions of bearing types.
  • A participant reiterates concerns about the magnet possibly pulling components out of alignment, which could lead to increased wear, while acknowledging that static loads can have similar effects.
  • Another participant elaborates on the idea that the magnet applies forces to individual components, which could differ from how typical loads act on the bearing as a whole.

Areas of Agreement / Disagreement

Participants express differing views on the implications of magnetic forces on bearing performance, with no consensus reached on whether the magnet's influence is detrimental or not.

Contextual Notes

Participants discuss assumptions regarding lubrication and load distribution, but these aspects remain unresolved and depend on specific conditions and definitions of bearing operation.

pete
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I have a 28x15x7 stainless steel bearing mounted close to a powerful magnet and the magnet courses some drag when the bearings turns. This is no problem in this design, it’s a hand operated lever so very low rpm and I was even thinking that a magnet might me a good way to add some dampening to the action but I’m wondering if having a magnet acting on a bearing like this has any long term detrimental effect on the bearing it’s self?
 
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What kind of bearing is it? Rolling element, fluid film, sleeve, or what?
 
Normal bearing. Deep groove, rubber sealed bearing. Two Raceways a cage and some balls. I was thinking that in motion the lubrication is supposed to form a film and the component parts are all supposed to adapt certain positions of reduced contact but with the magnet there maybe things would be pulled out of place and start to wear on each other? but then again there's an acceptable amount of misalignment of load on these things and the force the magnets pulls on them is so small compared to the load they are carrying.
 
The term "normal bearing" really does not say much at all. There are dozens of other bearing types, none of them abnormal. It is only when you begin to describe the construction (deep groove, two raceways, a cage, some balls, etc) that you begin to communicate what your bearing type is.
 
pete said:
I was thinking that in motion the lubrication is supposed to form a film and the component parts are all supposed to adapt certain positions of reduced contact but with the magnet there maybe things would be pulled out of place and start to wear on each other?
Certainly - as any other type of static load will cause the exact same effect.
 
I thought it would be the same but then a load acts upon the raceway that acts on the bearing and so on but the magnet acts on the components individually and also it can, and in this case would, pull them from the side or any other direction as the load was acting down on them.
 

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