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antedeluvian
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Conecut
antedeluvian   7/7/2014 1:08:35 PM
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David

 

I have a variation on the stepped drill bits you show. They are called cone-cuts and they are exactly that- cones wtihout the steps that you have. It seems to me that the original manufacturer doesn't exist any more, but Here is a similar part or the ones in the middle here.

I actually have two for different hole sizes. The porblem as you might guess is actually drilling out the right diameter. I did see a suggestion of using a washer of the right size (or slightly smaller) fitted over the bit to help stop at the right point.

tom-ii
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Re: Favorite hole-making tools
tom-ii   7/7/2014 11:18:17 AM
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@Max:

 

Yeah, that's me - I have whole series of stuff involving firearms.  That was a lucky shot, but I got about 3 or 4 on that day that are just beautiful.  This is the one I like the most.

 

I even caught the bullet comming down the barrel in a .45 pistol, too!

Max The Magnificent
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Re: Favorite hole-making tools
Max The Magnificent   7/7/2014 10:51:55 AM
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@Tom-ii: That is an amazing picture -- is that you?

perl_geek
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Aligning Holes
perl_geek   7/6/2014 10:30:37 AM
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If you aren't already aware of them, you might like to know about Clecos: http://www.rivetsonline.com/cleco.html which are to sheet-metal working what pins are to dress-making. They're a temporary fastener to hold 2 pieces aligned together while they are drilled or riveted.

If you want a lot of holes evenly spaced, an adjustable rivet spacer is a alternative http://www.aircraftspruce.com/catalog/topages/rivspacer.php?clickkey=6495 to a sheet of perf-board, but whether the extra expense is justified would depend on how important regularity and particular spacing is.

tom-ii
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Re: Favorite hole-making tools
tom-ii   7/6/2014 8:51:00 AM
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I have a couple of "Rat files" that can make decent work of the ragged edges...

David Ashton
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Re: Favorite hole-making tools
David Ashton   7/6/2014 7:13:51 AM
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@Tom-ii....yes, but they make such untidy holes.... :-)

Davy.Baker
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Rookie
Re: 256 Holes
Davy.Baker   7/6/2014 3:09:46 AM
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Day pass at TechShop with laser and/or ShopBot.

David Ashton
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Re: Hands on approaches
David Ashton   7/4/2014 6:51:27 PM
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@ca94002...thanks for that.....I could easily have expanded this to two articles with all the other tools that commenters have given.  I have a leather punch and a hand reamer as you describe, so I should not have forgotten about them.  But then again, if I had covered everything I probably would not have got all these comments!

betajet
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CEO
Re: Do it yourself pad cutter
betajet   7/4/2014 5:13:00 PM
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Aubrey wrote: The guy calls it a trepanner.

Good name -- it's akin to the tools used for trepanning, the technique of drilling a hole in people's skulls for treating various conditions.  Trepanning goes back to the Neolithic Era.

antedeluvian
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Do it yourself pad cutter
antedeluvian   7/4/2014 4:12:45 PM
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Found this whilst searching for pad cutters. The guy calls it a trepanner.

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