High Temperature Replacement for C95400

[tha89sx]

We are currently investigating a replacement bushing material for C95400 aluma bronze. Our application operating temperatures are now reaching 1300° which is far above the maximum operating temperature of the C95400.

For the application, the bushing is pressed into a cast iron housing. A 303 stainless shaft travels through the bushing, there is very little load on the shaft and the shaft only rotates 90° back an forth about 5 times a minute.

We were considering using Nitronic 60 for its high temperature service properties as well as its anti galling properties.

Any other ideas are appreciated.

 

[unclesyd]

We didn't have much success with Nitronic 60 above 1000F. Not saying it want work at your temperature but under our conditions it didn't

I would try to use a CI bushing from ASB with a high temperature lubricant from ZYP. Do not use graphite or moly as your temperature is too high.

http://www.asbbearings.com/cast_iron_bushings.html

http://www.zypcoatings.com/ProductPages/BnCoatings.htm

What is your operating environment?

Is the 1300F the max or is it a continuous temperature?

 

[tha89sx]

Sorry the 1300° is the maximum temperature would see. Standard operating temperatres would be in the range of 600°-700°.

The assembly sits in the exhaust of a diesel engine. So you would have plenty of carbon soot, moisture, CO... expelled from the engine.