03-17-2013, 05:43 AM
Rleete has the right idea re a honing allowance, I think.
If I were doing the boring I would use the knee elevation todo it all, the quill is likely to deflect more than the knee will over the length of the bore - or if the mill head can tilt over to 90* you *could* use a boring bar with a bushing in a 'tailstock' (or lathe fixed steady /rest) supporting the far end bolted to the mill table, and use the table X-traverse to pass the cylinders over the cutter - guarantees a cylindrical bore and gives you some extra capacity? If you have power feed on the axis, you'll get a more consistent finish by using it, too
Interesting project, how many hp are those engines?
Just my ha'pennorth,
Dave H. (the other one)
If I were doing the boring I would use the knee elevation todo it all, the quill is likely to deflect more than the knee will over the length of the bore - or if the mill head can tilt over to 90* you *could* use a boring bar with a bushing in a 'tailstock' (or lathe fixed steady /rest) supporting the far end bolted to the mill table, and use the table X-traverse to pass the cylinders over the cutter - guarantees a cylindrical bore and gives you some extra capacity? If you have power feed on the axis, you'll get a more consistent finish by using it, too
Interesting project, how many hp are those engines?
Just my ha'pennorth,
Dave H. (the other one)
Rules are for the obedience of fools, and the guidance of wise men...
(Douglas Bader)
(Douglas Bader)