Bulk Metal Removal, Any suggestions?

I will definitely have the tailstock and live center in position in addition the threaded rod through the mandrel so feel better about taking heavy cuts thanks to the advice on this forum.

Originally the customer arranged to get the blanks rough turned (by the person that supplied the steel) before they were issued to me. When I got them one of the blanks had about 5mm turned off the OD, I suspect they then got tired and made some excuse so I got dumped on really.

Ian P

Neil

If I had a bandsaw, I would too.

Ian P

I might try getting a core drill into it, then attack from the side with a parting tool.

But with so many teeth in action at the same time, a beefy motor might be needed, and core drills can have problems with clearing chips from a deep annular groove.

Andyye

If you can't/don't want to put a center hole in the bar, get a short scrap, ie., 2" dia x 1/2" long(or what ever), put a center hole in that, put that between the bar and the rotary center, that will make quite a difference. Ian S C

You could make a TCT hole saw out of some 60nb pipe with carbide tips and bore it on a decent mill then part off ?

i would personally hand it back and get them to do the rough machining !

Ian

If you have a stop to trip out the feed, find something else to do while the swarf is being generated.

Chris

I made a back plate for a 6" 4 jaw chuck from a bit of scrap steel 250 mm dia x 80 mm thick, as it had been flame cut from a sheet of hot rolled steel the start of the cut was in my bit of scrap, so I had to mount it off center, and work in low back gear, took a couple of days to end up with a very servicable back plate, thread cut and all, my first internal thread. Think the hardest bit of the job was carrying the lump of scrap around town until I got the bus home, thats a heavy bit of metal. Ian S C