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Brass is an alloy of copper and zinc, but often other elements such as aluminium, iron, manganese, tin and lead are added.
There are two basic classes of brass:
|Density kg/m3||8400 to 8600|
|Modulus of elasticity E GPa||96 to 110|
|Modulus of elasticity G GPa||36 to 41|
|Poisson's ratio v||0.34|
The larger gears for the 4-cycle solenoid V-twin machined from brass and designed to run against steel smaller drive gear.
Brass can be machined very crisp.
Bronze and brass are very similar when machining. TCT tools work very well with a very shallow back and side rake (see Lathe Tools).
We reviewed the Glanze TCT tools.
These tools have a steel body with separate TCT bits that are pre-machined to the correct angles. When the bit wears out or gets chipped then you just replace it.
Note that when machining rough castings it is very easy to chip the tools, so take that into account and use small cuts at first.
If you want a very bright finish then use a very fine wet and dry paper and then finish with wire wool. Note that brass tarnishes quite quickly and so you will either have to buff regularly or use a lacquer.
See also: Bronze.