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Bob UK
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Posted From: 94.197.122.80
Posted on Tuesday, 20 January, 2015 - 10:55 am:   Edit PostDelete PostView Post/Check IP

The bronzes.

This is a copper based alloy but instead of zinc as in brass, tin and or lead and or aluminum and silicon and manganese.Also gold and silver but that's rare for obvious reasons.

Also there are bronzes that are also brassy in that zinc is in the mix.

Bronze machines like Stainless and doesn't splinter like brass. It screw cuts nice.

Its much tougher than brass.

Two bronzes are of interest to the car.
Phosphor bronze makes excellent brgs which take far far more load than a race, especially in oil bath and pressure fed designs.

Sintered Bronze this is graphite and bronze dust squashed and heated together, the squashing bit is around 50tons per square inch and the heat about 300c.
This gives a preformed Bush that can be further machined. This stuff is useful for bushes that have little lubrication. Things like clutch spigot bearings and electric motor bearings.
Before fitting soak in oil overnight. This stuff is quite weak in tension but will take enormous compression loads.

Oilite is sintered bronze and made by Deva department at Glacier metal. A mate worked there and he was black with graphite dust. I first met him nursery at 3 year's old and we went though school together, he's now retired.

Other names for the bronzes are gun metal admirality bronze and naval bronze.

It solders and conducts electricity well.

Also it makes good bells, statues, plaques and cylinder heads.

Made some new bushes for guitar machine heads from phosphor bronze and the tuning feels so smooth. The originals were nylon and oval shaped. The bronze ones will last forever. Plus they look the bees knees. It's little details that make guitars stay in tune not wobbly nylon bushes.

(Message approved by david_gore)

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