Lapping Aluminium
Lapping Aluminium
(OP)
What is the best way and compound to lap a 30% Si Aluminium alloy?
Used for pistons running in tapered hard chrome bore.
Yes the piston has some 'pinch' towards the top. This is a must have.
I have lapped the bore with Diamond paste on an internal lap with exellent results.
Ken





RE: Lapping Aluminium
Alternatively, you could ave it machined by Single Point Diamond Turning which will give an optical polish with extremely tight tolerances and physicaly stronger
RE: Lapping Aluminium
The diamond paste cannot be used on the aluminium as it will become embedded never to be removed. Do you know of any compounds specifically for aluminium?
Ken
RE: Lapping Aluminium
We may have bought the Garnet abrasive from the Helical Lap Co.
http://www.helicallap.com/index.html
You can get the Simichrome Polish at most good hardware stores.
http://
RE: Lapping Aluminium
Exactly what i need to know!
Ken