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franke Master Poster
Joined: 26 Jun 2004 Posts: 161 Location: Indiana, USA
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Posted: Mon Dec 05, 2005 11:10 pm Post subject: Flat bottom C-bore |
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Today i have to make about 40 units of a part, that is very basic... Its basicly a flat circle... like a donut... There is a bolt circle that has 5 holes... That part is easy...
there is no threading... Just straight through...
But there are counter bores... I have never done a counter bore before... If i drill a through hole, can i use an Endmill for the counter bore ?
I know that endmills are ussually not used to go up/down with like a drill... But lets say its only going to cut 0.100 dia , would that work ?
if not, what would you guys use to create a flat bottom for a counter bore ? A regular twist drill wont do it because its pointy... I need something flat at the tip right ?
I know this is a total newbie question, but i have only run 1 job on a cnc mill... and it was a straight through hole...
So what is good for a flat bottom C-bore ? _________________ --------------------------
Thanks for everything. |
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JoeM Master Poster
Joined: 09 Jul 2004 Posts: 122 Location: Jackson Hole, Wyoming USA
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Posted: Mon Dec 05, 2005 11:11 pm Post subject: |
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An end mill isn't perfectly flat on the end, but it's usually good enough for counterboring (by plunging) a drilled hole for a socket head cap screw or something like that. If it had to be perfectly flat, you could drop down into the drilled hole and mill a circle. _________________ Thanks.
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