Thermally Insulative Bushing Material

[GrenDesb]

I want to drive a hot shaft with a hollow shaft gearbox without frying it.

Looking at a material that is thermally insulative but can take the load.

Shaft gets to 160C (I can reduce it if needed) while gearbox max temp is 80C.

Would like to stay away from couplings to keep the width of the assembly to a minimum.

I don't know much about such materials so any clue would be of some help.

Regards

 

[MintJulep]

Torlon, Rulon, PEEK.

 

[EdStainless]

There are couplings with thermal break in them, and cooling fins.
I can't give you a link off hand but I have seen them.

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Plymouth Tube

 

[Compositepro]

This is a problem common to all high temperature convection ovens. A motor drives a blower that is at high temperature. If there is no room for a long shaft, the shaft will have a small, crude paddle blower mounted on it where the shaft exits the hot zone. This keeps cool air circulating around the shaft. It is also why ovens are not turned-of when hot. Ovens are allowed to cool below a certain temperature before blowers are turned-off so the bearing do not get cooked.

 

[GrenDesb]

MintJulep answer is what I needed.

I'm trying to stay away from std couplings to save the space.

It's a conveyor shaft and will be running at max 5 RPM so unlike blower shafts, a heat sling or a cool down procedure won't do it. A heat sink on the shaft could help but if I can get away without it it's even better.

Thank you much guys, it was my first post but I think I'll hang around.