First of all, apologies for being a bit of a parasite on this forum. I'm new to CNC lathes, but I've worked a lot on manual machines. All of your comments are always most appreciated!
Okay, here it goes;
If I'm going to center drill a POM-C bar(no pecking) and thereafter bring in the boring bar - then (in my head at least) there shouldn't be too much radial loads if I run things with a careful feedrate and low RPM's. The stock in question will have Ø250mm (~10") and 340mm (~13") length.
Do you guys consistently adhere to the 1/3rd rule of thumb in terms of jaw grip length?
Can I reduce grip length if I use common sense and keep the RPMs low combined with a gentle feed? I presume sentrifugal load is the thing to worry about here. Assume cut steel soft jaws and hydraulic chuck.
On the smaller manual lathe with hard jaws I have used very little grip length at times, and yes, parts have flown out, so I take this matter very seriously. It's just fun until I get hurt/killed or wreck a 100k machine..
Thanks again,
Cheers
John
Okay, here it goes;
If I'm going to center drill a POM-C bar(no pecking) and thereafter bring in the boring bar - then (in my head at least) there shouldn't be too much radial loads if I run things with a careful feedrate and low RPM's. The stock in question will have Ø250mm (~10") and 340mm (~13") length.
Do you guys consistently adhere to the 1/3rd rule of thumb in terms of jaw grip length?
Can I reduce grip length if I use common sense and keep the RPMs low combined with a gentle feed? I presume sentrifugal load is the thing to worry about here. Assume cut steel soft jaws and hydraulic chuck.
On the smaller manual lathe with hard jaws I have used very little grip length at times, and yes, parts have flown out, so I take this matter very seriously. It's just fun until I get hurt/killed or wreck a 100k machine..
Thanks again,
Cheers
John