Previous in Forum: Are Micro Wave Communication Satellites Heating the Upper Atmosphere   Next in Forum: How To Become an Astronaut - Part 1
Close
Close
Close
5 comments
Anonymous Poster

Brass-aluminum bearing thrusts

08/13/2007 12:28 PM

Hi all,

Could you please give some clues about choosing a suitable specification of the pair aluminum 6061 (male) and brass (?) (female), to be used in a bearing thrust for aerospace application? Is there any restriction about surface coating and hardness ?

Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Guru
Popular Science - Weaponology - New Member United Kingdom - Member - New Member

Join Date: May 2007
Location: Harlow England
Posts: 16498
Good Answers: 661
#1

Re: Brass-aluminum bearing thrusts

08/13/2007 1:15 PM

Aluminium as a bearing surface is a new one to me!

__________________
health warning: These posts may contain traces of nut.
Reply
Guru
Engineering Fields - Systems Engineering - New Member Hobbies - Model Rocketry - New Member

Join Date: Dec 2006
Location: Long.92E,Lat.26N
Posts: 1336
Good Answers: 14
#3
In reply to #1

Re: Brass-aluminum bearing thrusts

08/14/2007 12:34 PM

Aluminium -Bronzes are Bearing materials. Radial or Thrust.

Brass Never.PlainAluminium Never. Both might Sieze at stresses at which bearings operate.

Reply
Power-User
United States - Member - New Member Popular Science - Weaponology - New Member

Join Date: Apr 2007
Location: North East Pennsylvania
Posts: 331
Good Answers: 7
#2

Re: Brass-aluminum bearing thrusts

08/13/2007 11:21 PM

I don't know what you mean by aerospace application. That is a very broad spectrum. Brass and aluminum are sometimes used together in tooling applications to prevent galling which would occur with aluminum to aluminum or brass to brass. In this type of application I would use 7075 aluminum instead of 6061. It is better suited to wear applications and is much harder than 6061. Even better if you can get it in T8 heat treat condition. Better yet with either alloy have it hard anodized. Don't make your brass part until after you get the aluminum part back from anodize because the surface buildup can vary from .0001 to .0007 per surface. Beyond that the anodize process begins to eat up the aluminum rather than build it up. The hard anodized surface should be about 60rc hardness, with a hard shell thickness of about .0015max. You will still need lubrication appropriate to your application.

__________________
Men are like steel, if they lose their temper they are worthless.
Reply
Anonymous Poster
#4

Re: Brass-aluminum bearing thrusts

08/14/2007 2:07 PM

Have you thought about using plastic in this environment instead of aluminum? Delrin AF is always good for bearing and wear situations along with MC 901 Nylon. Since Delrin AF does contain some PTFE (Teflon) it should seal up rather nicely in a threaded male/female situation.

Reply
Associate
Engineering Fields - Manufacturing Engineering - New Member Engineering Fields - Mechanical Engineering - New Member

Join Date: Oct 2006
Location: China
Posts: 39
#5

Re: Brass-aluminum bearing thrusts

08/14/2007 8:17 PM

What's using condition of this pair?

Temperate,thrust load and movement frequency?

simple surggestion for this pair is aluminum 6061 and bronze(aluminum base).

__________________
william.bei
Reply
Reply to Forum Thread 5 comments
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); Del the cat (1); garyceng (1); MUKULMAHANT (1); william.bei (1)

Previous in Forum: Are Micro Wave Communication Satellites Heating the Upper Atmosphere   Next in Forum: How To Become an Astronaut - Part 1

Advertisement