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Old 5th March 2007, 01:48 PM   #1
impsick is offline impsick  United States
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Default drilling pcbs

i was wondering what size drill bits you guys are using when drilling out your pcbs at home? i have only found 1/16 inch bits and thats too big! where do you guys get your smaller bit size?
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Old 5th March 2007, 01:54 PM   #2
traw is offline traw  United States
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home depot has the dremel precision drill bi kits, around 7 bucks give you the 2 smaller sizes. or can order the smaller bits from digikey. i myself go to a local industrial supply shop, most any of those type stores will have the 0.040 size you'd like. think they actually go by numbers, like #60 or something...
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Old 5th March 2007, 02:02 PM   #3
jaycee is offline jaycee  United Kingdom
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Look on eBay and you will find people selling them too... usually specified in millimetres though. 0.6mm, 0.8mm and 1mm are usually good enough for most things, but you really need a drill press of some kind - a mini one for a hobbycraft drill will do.
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Old 5th March 2007, 02:12 PM   #4
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A drill stand is essential. Also use carbide bits as the hole is MUCH cleaner that with HSS bits.

0.7mm is perfect for resistors and most caps and small diodes
0.9mm for 1N4001 size diodes and some bigger caps
1.0mm for TO220
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Old 5th March 2007, 02:17 PM   #5
impsick is offline impsick  United States
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ya i figured i need a press. i'll check out ebay. thanks
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Old 6th March 2007, 07:14 PM   #6
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you can ask your dentist for used teeth drills.

it may be not useful for teeth drilling anymore, but can be for home use.

they have several models, including some incrusted with diamond powder that are great for smoothing corners, even if wear.

also very handy to scare your little sister
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Old 8th March 2007, 07:06 PM   #7
KISS is offline KISS  United States
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Try www.smallparstsinc.com and search for "circuit board drills". A reminder that small drills require high speeds for drilling. Dremel makes a drill press attachment for their moto tool, model 212.
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Old 8th March 2007, 07:24 PM   #8
Minion is offline Minion  Canada
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You don"t need a Drill Press or anything like that at all....I simply use a Dremmel Rotary tool and get very accurate drill holes....

You can get a set of Carbide Mini Drill bits for about $15 on e-bay and they work great for even the smallest holes......


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Old 8th March 2007, 07:25 PM   #9
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Either you're not using small enough drill bits then, or you have a robot arm! I've broken loads of 0.7mm bits even with a drill stand. Then again I've made a fair few boards.
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Old 8th March 2007, 07:27 PM   #10
KISS is offline KISS  United States
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Or not drilling enough holes.
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