On 02/14/2012 06:40 PM, Steve Blackmore wrote:
> You were likely taking too small a cut and rubbing the insert to death
> rather than cutting with it :)
>
> Minimum 150 thou depth of cut,
The race is a touch under 0.400" thick, so I should be able to get it
off in a couple passes, plus a couple cleanup passes.
I was only doing 0.020" - 0.040" depth of cut, and in my mind, 0.150"
sounds like I'm going to have some serious pucker issues. I've already
bent a 1/2" toolholder, by putting too much pressure on it.
> 7-10 thou feed or so at 450rpm.
I was running 0.007" - 0.013" feed. @ 300, and 525 rpm's. The race
has a 80mm (3.1496") bore.
> Chips
> should come off brown to blue. If it's sparking, up the feed until it
> just stops. A 2HP lathe should be able to handle that.
>
> Even C2 inserts will machine pre hardened 4140 at the correct
> feeds/speeds. If you can, use flood coolant, if not run dry - don't
> squirt oil on occasionally, all your likely to do is thermal crack the
> insert.
That may have been an issue on the race, I was applying a fairly
steady flow of oil, but I was using a oil can to apply it. My Kool mist
system is out of commision until I get my air compressor relocated
outside the shop.
> Steve Blackmore
> --
Thanks Steve.
--
-Mark
Ne M'oubliez ---Family Motto
Hope for the best, plan for the worst ---Personal Motto
------------------------------------------------------------------------------
Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing
also focuses on allowing computing to be delivered as a service.
http://www.accelacomm.com/jaw/sfnl/114/51521223/
_______________________________________________
Emc-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-users
