Guineafowl
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There was a useful thread on here about this, but I can’t find it.
Say I need 130 thou off a diameter, 65 thou total depth of cut. CCMT carbide insert, some sort of steel, say EN19.
Smaller lathe (AUD), so I might do 20, 20, 20, then 5. This might overshoot, because the spring of the tool would add extra depth to the 5 thou pass.
I’m not quite brave enough to dial in a big cut as the final pass, so tend to get near dimension, then ‘peck‘ at it loads of times. Not ideal for the insert.
Am I better off doing:
25, 20, measure, 20, ie divide the DOC into roughly equal amounts
20, 20, 20, spring, 5
Something else?
Say I need 130 thou off a diameter, 65 thou total depth of cut. CCMT carbide insert, some sort of steel, say EN19.
Smaller lathe (AUD), so I might do 20, 20, 20, then 5. This might overshoot, because the spring of the tool would add extra depth to the 5 thou pass.
I’m not quite brave enough to dial in a big cut as the final pass, so tend to get near dimension, then ‘peck‘ at it loads of times. Not ideal for the insert.
Am I better off doing:
25, 20, measure, 20, ie divide the DOC into roughly equal amounts
20, 20, 20, spring, 5
Something else?