High Temperature Ballscrew Design

[BallscrewBob]

Hello all, I just joined this forum, hope I can contribute as well as get some direction.

I am a design engineer at a linear actuator supplier for aerospace applications, in particular ballscrew actuators.

We have recently seen a surge in the number of RFQ's for high temperature ballscrew actuators, one in particular I am working on currently will be operating in 700-800F though for a short time.

I am looking into possible materials and at this point have it narrowed down to 3-

Inconel 718
Waspaloy
A286

Thoughts, comments, suggestions, etc. would be welcome.

Thanks

 

[israelkk]

How about ceramics?

 

[imagitec]

The choice would depend on requirements such as load, acceleration, precision, and stroke length. In general, matching CTEs of mating parts would be critical.

Two sites I've used for high-temperature applications are:

http://www.specialmetals.com/

http://www.hightempmetals.com/

Rob Campbell, PE
Finite Monkeys -

http://www.livejournal.com/users/robcampbell