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Turning / machining Aluminium - Tips

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Jon01/04/2012 23:58:40
1001 forum posts
49 photos

Not my intention Andrew far from it.

Higher spindle speed, slow feed rate and less depth of cut generates less heat.

There are many times i cant use coolant unless want a shower, i get a feel for whats happening but have to be quick. The difference here is having not by choice to run up to 540rpm or RCCD trips 1 in 3 times at 800, even worse above. Quite the opposite to you and generates heat quick with slow spindle speed, slow feed and heavy ish cut or cuts to purely get job done.

Pretty good that but what happens when you thin down shortish lengths say 1" long from 1" dia to less than 1/2" diameter?

I tend to buy specific aluminium tips most are ok until heat is generated. The exception is my larger boring bar, it dont want to know unless removing up to 10 thou then its dodgy. It thrives on coolant even when job is cold.

Andrew Johnston02/04/2012 23:16:25
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7061 forum posts
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Jon,

No problem, it was a tongue in cheek comment.

As it happens the stock I turned started off just over an inch in diameter, so after a depth of cut of 0.1" followed by 0.2" it ended up about 0.5" diameter. Total length of cut was about 1", again by chance. Seemed to work fine, although if I was turning to a specific diameter I'd have taken a third lighter cut before measuring for the final 'to size' cut.

Regards,

Andrew

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