Design of GUNMETAL Bush

Something seems wrong here. Gun metal might be suited to sliding contact with relatively low pressure, but it would be poorly matched to rolling contact, which has higher stress per area.

BTW, it's "bushing" rather than "bush" (we hereby ignore Dubya).

Tornado,

They are also frequently used for bearings where loads and speeds are moderate.

And one more information. In the mean while I got the following link related to design of bearing thickness & length.

http://www.lubroglide.com/DesignGuide.htm

But I couldn't understand, how well it's related to material properties & force. Is it just a thumb rule?

Ok to attempt your question a bit seriously.

The bearings/bushes, in your link are also known as 'sintered bronze'.

Because it is like a sponge to retain oil (or graphite), the base material is 'sparser' so the compression strength is proportionately less than the 'solid parent metal'.

Meaning you need to grow in diameter and/or length for a certain load/rpm/heat disipation.

But what part of the calculation process was unclear?

Here I'm considering the plain bearing bush.

But in that link, the formulae have been given to decide thickness, length.

But in Gunmetal itself there are some varieties and also differs in it's mechanical properties. Then how come we determine the bearing bush parameters just with diameter

alone. The following diagram shows(partial view only shown) my design of "Leveller machine" for sheet metal.

I need to calculate the thickness that withstand against the given hydraulic pressure.

Gunmetal bush has been placed by means of tight fit. And driving fit is given b/w bush

& roller. The slider can be adjusted so as to have clearance to get the sheet metal inside(within the stroke). I need a clear view to decide not only here, for general capacity of bearing bush. I hope you got clear. right?? Thanks for back into discussion..

To me, this is a bush:

If you mean something else, please elucidate!

It is "bush" in Brit-speak - pretty much everywhere outside America /Canadia.

Try not to be quite so parochial gentlemen - you are in "also called" on this one.

bush²

n (Engineering / Mechanical Engineering) Also called (esp US and Canadian) bushing a thin metal sleeve or tubular lining serving as a bearing or guidevb (Engineering / Mechanical Engineering) to fit a bush to (a casing, bearing, etc.)[from Middle Dutch busse box, bush; related to German Büchse tin, Swedish hjulbōssa wheel-box, Late Latin buxis box¹]

Occurred to me too. Just trying to get some feedback from OP.

I realize, of course, that we could get into a lengthy disquisition on the merits of Noah Webster versus antiquated Francophonisms such as labour, colour, and centre. Samuel Johnson tried to get the Brits off of that merde, but alas he did not succeed. This could make for an amusing debate.

Now Tornado, I have told you before the French put all the "U's" in things and the 'merkins swap "Z's" for "S's" willy-nilly.

So I'm not about to entertain your theories on the part an African-American actor plays in de-merde-ing language, whilst you people make nouns out of verbs and go "horse-back riding", as if to distinguish that from;

"horse-front riding".

Horse side riding;

Horse trail riding

and let's just call it "equine terrorism"

Mikerho,

"Hope you are having a nice sense of humour. Well, the kind info., please have a look at the following. It may be useful for others also.

Alloys of copper with tin, zinc and lead have been used for at least 2000 years due to their ease of casting and good strength and corrosion resistance. Early uses were for brooches, mirror cases, church doors, fonts and statues. The use for cannons in Mediaeval times led to the term 'gun metal' being adopted; this use is now obsolete with the manufacture of steel ordnance.

Today, in the UK, the term 'gunmetal' is applied to a family of copper-based casting alloys containing between 2-11% tin and 1-10% zinc. Modified forms may contain, in addition, such elements as lead (up to 7%) and nickel (up to 6%) when the alloys are classified as 'leaded gunmetal' and 'nickel gunmetal'.

Gunmetals are noted for the manufacture of intricate castings required to be pressure tight such as valves, pipe fittings and pumps.

They are also frequently used for bearings where loads and speeds are moderate.

Gunmetals are the first choice for modern statues; recent examples being:

• Bobby Moore (outside Wembley Stadium)
• Nelson Mandela (in Parliament Square)
• 'The Meeting Place' (in St. Pancras International Station, London)."

Looks interesting!!.. Thanks for your question which makes some clear view to others..

"Gunmetal" also known as red brass in the USA is used for gears, castings, valves and bushings. Known for it's resistance to steam and salt water.

Okay. Whatevah. _Sammy.