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Old 3rd January 2011, 04:25 AM   #11
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I started out using a dremel free-hand with HSS bits, but for some of the smaller holes I needed it just wasn't good enough.

I now use a dremel with a drill-press adapter and carbide bits. I can get micro carbide bit assortments at my local Harbor Freight for dirt cheap. I rarely ever break a bit, but when I do it's usually from bumping it with the edge of the board or dropping the bit on the ground.
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Old 3rd January 2011, 04:44 AM   #12
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I've "caught up" with john lately ..
In december :
power boards - about 155 holes X 12 =1860 holes
power supplies - 70 X6 = 420
AX/BX - 108 X 16 = 1728
Roughly 2-300 holes for my various crossovers/little amps/softstarts.

4300 holes drilled with a 25$ black and decker AC drill , using the thumb of one hand as the "guide" and my other arm as the "press". Went through 3 #70 wire bits for all 4300 drillings on a plywood sheet as backing. Over 1400 holes per drill bit.
Some holes were drilled out to 1/16" or even 1/8" for larger components (fastons/large diodes).
I wish I could have a dremel , but still it only took 3-4 hours of straight drilling for all those.(with breaks)
15 minutes and 200 holes I get another 200w "blaster" (below)
Click the image to open in full size.

Next round , heck with this .... let someone else do it. I use software that exports gerber/excellon , even milling data (sprint layout).

OS
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Old 3rd January 2011, 05:18 AM   #13
liquias is offline liquias  Israel
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I've been using my Dremel for years, by hand.
I second having the chuck as one one of the most useful tools to have, but also the extension in the picture has made my life allot easier.
(Picture included).
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Old 3rd January 2011, 02:15 PM   #14
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Quote:
Originally Posted by ostripper View Post
I've "caught up" with john lately ..
If you say so...

NPX_01148.JPG

just some of what I haven't thrown out yet. Not included is all that I did throw out, can't find or is actually in use in various projects here, there and everywhere.



Hat's off to you for using a drill. Not how I'd want to do it.
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Old 3rd January 2011, 02:19 PM   #15
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Originally Posted by MJL21193 View Post
If you say so...

Attachment 203730

just some of what I haven't thrown out yet. Not included is all that I did throw out, can't find or is actually in use in various projects here, there and everywhere.



Hat's off to you for using a drill. Not how I'd want to do it.
I have my "donation pile" as well. I gave some to keentoken , others are being traded for parts and speaker components ... another 3-4000 holes . Very strong hands and arms doing it with the drill .. ouch !!
PS , don't throw out them wonderful parts (caps) , I even save the solder blobs I "rap" off the used boards in a pill bottle for future tinning.
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Last edited by ostripper; 3rd January 2011 at 02:31 PM.
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Old 3rd January 2011, 02:24 PM   #16
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Oh, a word of warning...

One day at work I was doing some drilling. Despite some huffing and puffing a scrap of GRP swarf still clung to the drill bit. I incautiously waved my finger at it to dislodge it, the tip of the (extremely sharp tungsten) bit contacted my fingernail and dragged my finger onto the drill, emerging from the pad. I can still feel it drilling through my finger in my imagination. Shudder.

I won't do that again.

w
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Old 3rd January 2011, 02:40 PM   #17
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PS , don't throw out them wonderful parts
Even though it gets me in trouble once in a while, everything gets pulled, except the 1/4 watt resistors. I'm not actually made of money...

I find tinning takes remarkably little solder. I have a roll of Radio Shack flux core that I don't like and use that.
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Old 3rd January 2011, 02:59 PM   #18
NYCOne is offline NYCOne  United States
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I bought 20 Tungsten Carbide bits from Harbor Frieght for $5. A great deal. I freehand with a dremel flexcord and use the larger bits ~0.7mm. No broken bits yet.

About tinning - I started tinning and found no difference in "solderability". If I laquer my boards after stuffing, if there an advantange to tinning?
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Old 3rd January 2011, 03:26 PM   #19
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Quote:
Originally Posted by NYCOne View Post
I bought 20 Tungsten Carbide bits from Harbor Frieght for $5. A great deal. I freehand with a dremel flexcord and use the larger bits ~0.7mm. No broken bits yet.

About tinning - I started tinning and found no difference in "solderability". If I laquer my boards after stuffing, if there an advantange to tinning?
If you use SN/CU to tin it - more current. PB/SN just retards oxidation of the copper - very little extra current capacity ,but lower temp. I use mix of both (PB/SN/CU).

BTW , my "1400 holes per bit" were the harbor freight ones.

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Old 4th January 2011, 12:10 AM   #20
Krisfr is offline Krisfr  United States
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I settled on these with Great Results

Thanks to all for comments and techniques. I am ready to rock and ROLL

The drill is small light weight and just does the job without the slightest strain.

Less than 10 bucks on SALE Total
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