Bearing temprature rise

Hello Guest,

There is a simple answer to your question: Friction and/or lack of cooling.

Kind Regards....

Good input, Sparkstation. I'll add three (3) more: (a) misalignment (b) axial thrust load (c) bearing of incorrect design for application.

Best Regards,

Ing. Robert Forbus

How about the wrong greasing or excessive and improper greasing method?

Koshy Wilson

Is this a plane metal bearing or rotating element bearing?

If it is to hot to leave your hand on it, then it is too hot and you have a problem. What the problem is depends on what type of bearing you have. Or should that be - use to have?

BAB

There are various reasons for temp rise in bearing. I support all the replys but I would like add one important cause , that is if the inner rise is excessive tight while mounting will cause reduction of radial clearace which may cause for temp rise in bearing.

ok

Dear guest...YOU HAVE BEEN TOLD....of all the many reasons and perhaps the many combinations that can cause temprature rise in a bearing pedastal....

If the bearing is running hotter than normal then you may have a bearing failure on the near horizon.

Years ago I owned a Jones & Lamson ATL (Automatic Turret Lathe) that was built in 1965.

Temperature is one indication of the condition of the bearing and the sound signature is as well. It is not uncommon to have sound pick ups fitted to a speciffic bearing or to the casting of a machine tool to listen to the bearings as well as the cutters. Typically you will have a signature of the machine running without a load (no cutting) and then superimpose that ontop of what it sounds like during cutting to yield the noise generated by cutting only. As the tool wears the signature will change and you can set limits on the change to signal when it's time to change cutters. A sudden change in signature signals catastrophic tool failure.

Similar analasys can be done using a thermal signature.

Travis

There may be following reason for temp. rise in bearing.

1. Bearing is fitted overtight on shaft which leads reduction of internal clearance hence more friction

2. Escessive tight in housing leads to reduction of internal clearance

3. Wrong clearance setting compare to manufacturer recommandation

4. Lack of lubrication or excessive lubrication

TJM