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 Numbered drill bit sets 
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Joined: Sun May 12, 2013 5:21 am
Posts: 332
Location: Michigan
Been shopping round for a 61-80 drill bit set and was wondering where others get theirs. I seen a few cheap hobby store sets like Zona or Squadron for about $10-15+ship. Didn't check any of the big stores like Michaels or Hobby Lobby. A cheaper set was like $35 on McMaster-Carr. I don't think I'd trust ebay or harbor frieght and don't think I'll need an expensive set to drill hundreds of bleeds. Local hobby place has a set for $30 Walters.

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Fri May 17, 2013 10:27 am
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Joined: Sun May 12, 2013 5:21 am
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Location: Michigan
interesting http://www.widgetsupply.com/product/BLU ... MgodaR8Alg

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Fri May 17, 2013 10:34 am
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Joined: Tue Apr 02, 2013 1:20 pm
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I would wonder about the grind on something that cheap.


Fri May 17, 2013 2:42 pm
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Joined: Sat Feb 09, 2013 10:46 pm
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Ebay drill bits are fine. You are going to pin gauge whatever you drill, right? And every drill bit you chuck up gets measured, right?

Point here is that even the more expensive drill bits that small will vary. .001 or .002 variance in very small holes will make a difference. Because of that you need to measure every drill bit before you use it. Every hole you drill needs to have a plug gauge inserted in it to see if the size is true. Sometimes bleeds I drill end up the next size larger. I find that out when I gauge them.

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Fri May 17, 2013 4:12 pm
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Joined: Sun May 12, 2013 5:21 am
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Location: Michigan
Booster wrote:
Ebay drill bits are fine. You are going to pin gauge whatever you drill, right? And every drill bit you chuck up gets measured, right?

Point here is that even the more expensive drill bits that small will vary. .001 or .002 variance in very small holes will make a difference. Because of that you need to measure every drill bit before you use it. Every hole you drill needs to have a plug gauge inserted in it to see if the size is true. Sometimes bleeds I drill end up the next size larger. I find that out when I gauge them.



I bought a set from a local hobby shop for $25, because I wanted to mess with it today, but I might not have too now. I assume I can just mic the bit shank? And so where do you get your pin gauges from then?

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Fri May 17, 2013 7:45 pm
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Joined: Thu Mar 28, 2013 6:09 am
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http://www.ebay.com/itm/Import-50pc-Set ... 1c32c16404

http://www.ebay.com/itm/190-M1-061-250- ... 51a8fff742


Fri May 17, 2013 8:59 pm
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Joined: Sun May 12, 2013 5:21 am
Posts: 332
Location: Michigan
Cool thx for the links!

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Fri May 17, 2013 9:50 pm
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Joined: Sat Feb 09, 2013 10:46 pm
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Indicate to the sellers that you want a minus set. After drilling bleeds for a while you will develop a feel for gauging them.

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Fri May 17, 2013 10:53 pm
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Joined: Thu Mar 28, 2013 6:09 am
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Booster wrote:
Indicate to the sellers that you want a minus set. After drilling bleeds for a while you will develop a feel for gauging them.




Bruce I am not really sure what I have but they measure what my mic says. So what is a minus set?? Just a touch smaller?


Sat May 18, 2013 6:48 am
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Joined: Sat Feb 09, 2013 10:46 pm
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Barry, they are 2 tenths smaller. As I under stand it this allows for clearance to enter the hole, a tenth on each side. Not sure if that's correct but, that was the explanation I was given.

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Sat May 18, 2013 8:33 am
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