Does anyone who manufactures bearings have some advice? I have a question
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Why does too small a bearing clearance cause an increase in temperature? Is it because the excessive contact between the balls and the rings leads to an overall rise in the temperature of those rings, or is there some other reason?
It seems that this question doesn’t require a response from the bearing manufacturer; are you referring to an excessively small clearance? All bearings are in accordance with national standards. If you are operating in high-temperature environments, choose bearings with a larger clearance; if not, check whether the dimensions of your shaft and bearing housing are suitable for each other! Could you tell me about your specific situation?
The clearance is too small; the balls are in too tight contact with the raceways, which increases friction and leads to an increase in temperature
Lubricant serves two purposes: cooling and lubrication. If the clearance is too small, the amount of oil discharged is insufficient, and heat cannot be removed, resulting in higher temperatures
Too small a clearance? I think it’s caused by improper selection or installation of the bearings!
Your reply is exactly what I was thinking – it’s also a problem related to friction, but in this case it’s rolling friction. However, a too small clearance does not mean no clearance at all; as long as the bearing is subjected to the same load, the force exerted on it will be the same. It’s like having a 1000N force acting 3 meters above an object – this is the same as having a 1000N force acting 1 meter above the object. In the end, regardless of how far away the force is from the object, the object will still experience a force of 1000N
It’s not a matter of choosing the appropriate clearance; rather, it’s about the hazards that arise when the clearance is too small, and what causes those hazards
If the gap is too small, an oil film cannot be formed, resulting in increased friction and higher bearing temperatures!
I think the force you understand and the friction caused by too small a bearing clearance are not the same thing.
I think a small clearance will result in high radial forces