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| the best method to get out the Centre bit |
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| BillTodd:
Drilling holes will get the job done ! http://www.mycncuk.com/forums/showthread.php/1165-Drill-Mill-Spindle-brake-%28RF30%29?p=9000&viewfull=1#post9000 Bill P.S. The centre of this block is now my QCTP: http://www.homemodelenginemachinist.com/index.php?topic=5153.msg102066#msg102066 |
| lordedmond:
Thanks john for the Offer and advice Same for you Bill I am now spoilt for choice Stuart |
| Jonny:
Used to do this all the time in an ML7 but with a 5"+ chuck. Will take an eternity just drill hole through with largest available then bore out. Have done same on rotary table with chuck off the scrapped ML7. The cheap holesaws from the market i would give 10 secs on that material and dont think the ML7 will power with a 3"+ decent holesaw. Best way borrow a bigger lathe for 10 mins., welcome to use either of mine. |
| Anzaniste:
--- Quote from: Bogstandard on March 29, 2011, 07:01:42 AM ---If you can hold it on your lathe Stuart, the easiest way would be to grind youself up a trepanning tool of just over 1/2" cutting depth. Cut one side, turn around and then cut the other side. Centre falls out. Or just clamp it central onto your RT, and using something like a 6mm slot drill, machine thru it. Don't forget to put something sacrifical underneath, otherwise you would end up with a new circle in your RT top. I do have a commercial tipped trepanning tool, but it is a bit far for you to travel just to get it done. But the offer is there. John --- End quote --- What do they look like and who makes them. I regularly trepan the middle out of sprocket chain-wheels and could be interested in a better tool than mine. I always approach the job with knocking knees!!! |
| Bogstandard:
Not cheap by any means, but can be had for reasonable prices on eblag, if you are willing to wait for when they come up. They are made by Mircona. You will need to wait until I can get a piccy of mine tommorow, to show what they look like. Bogs |
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