Thread: Center Drill Bits
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22-06-2008 #1
Hi, i have recently recived some center drill bits as recomended by another member, i know what they are and how to use them.
I was just wondering if anyone had any advice or Tip when using them, i have been using them to make nema 23 motor mounts for my cnc machine:
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22-06-2008 #2
Sorry kip i hit the wrong button, kips posts are below:
Be careful when using small ones on hardened steel...they break!
And use a scriber rather than a marker pen as it's better for accuracy and never rely on a piece of metal being "square" when marking out.... :D
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22-06-2008 #3
Yes it did take me a few go's to get the holes right, i managed to get the holes close enuff that i could then file out a small amount so my screws would line up with the motors.
Now i have a template i just use that to make/mark out new plates and so on:
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23-06-2008 #4
There are some really naff centre drills around, regular PITA when they snap off. I got some cheap, centred 2 holes then lobbed the lot straight in the bin.
Caveat emptor, I've gone back to Plan A, don't use anything but Dormer :D
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23-06-2008 #5
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23-06-2008 #6
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23-06-2008 #7
You really need CNC it makes it so easy and everything lines up just perfect. No more swapping centre drill then bit then countersink/bore on every hole :D
I draw everything with AutoCad, convert the milling to G code and overlay the .dxf file on the cut file. Then I can use the "Move to hole" feature which puts me on the hole nearest the mouse.
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23-06-2008 #8
:) now i can mount my motors, my machine can move/work, guess what i will e making with my machine once its up and running :D
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23-06-2008 #9
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24-06-2008 #10
Yea i was thinking i'm gonna need to keep things cool if i'm doing ali cuts ? i was thinking of having a vac to clear the "chips" and my compressor blowing to keep the cutter cool ?
Have you got any pics of your pump?, this cnc stuff is leading me into so many "new area's" of making things so on, i love it i wish i had tuned in at school and gone down this path for a career.
Cheers,
Lee
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