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Old 14th February 2013, 05:01 AM   #31
balerit is offline balerit  South Africa
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Quote:
Originally Posted by Fusion916 View Post
Hey guys, question about dremel drill bits:

Bosch BL0060 Wire Gauge 1 to 60 Black Oxide Twist Drill Bit Assortment with Metal Index, 60-Piece - Amazon.com

Are these good drill bits and will they work with any dremel, such as this?

3000 Series Rotary Tool Kit-3000-1/25H at The Home Depot

Just want to make sure before I buy all of this.
The Dremel is really a grinder and takes only one diameter in it's little chuck.
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Old 14th February 2013, 02:28 PM   #32
qusp is offline qusp  Australia
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unless you get the attachment that allows quite a variety...
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Old 6th March 2013, 08:53 PM   #33
kamis is offline kamis  Serbia
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Originally Posted by gootee View Post
I just used a plain Dremel rotary tool. The higher the maximum speed it has, the better. Mine went to 30,000 RPM. I guess you could add a laser easily-enough. But you might need a lense or two, to make the spot smaller. I just kept the drill about 4 or 5 mm above the board.

The wire-gauge drill bits are not suitable for PCBs. The FR4 can't dissipate heat well and a steel bit gets very hot and goes dull within a couple hundred holes.
There are many wire-gauge bits which are made of "all hard metal" or HM drill bits.
and are suitable for FR4 PCB-s. German Burklin Electronic stocks them.
They are even suitable for hand held miniature drills being less breakable than 3.2 mm shaft types. I bought a large number of Ukrainian made hard metal wire gauge drill bits at local flea market for a very low price. I think that they are even better than solid carbide large shank types. HSS drill bits are good for about 30 holes.
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Old 6th March 2013, 09:23 PM   #34
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Prefer to just put the pcb out to a cheap Chinese company.
I can usually pick up 5 pcbs for 50.
In the UK it is double or triple that price.
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Old 6th March 2013, 09:42 PM   #35
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Originally Posted by nigelwright7557 View Post
I can usually pick up 5 pcbs for 50.
Of course you don't say what size PCB Nigel, but I get 10 each of 2 different PCBs 100*100 mm for U$49.80 here:- Fusion PCB Service - 2 layers [PCB08511P] - $9.90 : Seeed Studio Bazaar, Boost ideas, extend the reach, and if you buy some small item to take it over $50, shipping is free. I'm collecting solar cells. I always wait until I've got 2 designs to go, but you can buy 10 off 1 design 100*100 mm for U$24.90, but you have to pay the shipping.

That's a special price for 4in square, and you can tile it in smaller designs if you cut them up yourself.

I still make and drill my own PCBs for quick turnaround.

Oh, I use a full-size Chinese bench drill-press that accepts up to 1/2 in, and for drills < 1 mm, I roll them in a strip of printer paper to fit the chuck, it's surprising that there's very little runout. It cost less than a Dremel not including press. And I get a lot more than 30 holes from HSS, particularly if I use the paper/epoxy type board.

Last edited by counter culture; 6th March 2013 at 09:50 PM.
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Old 6th March 2013, 09:57 PM   #36
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Originally Posted by counter culture View Post
Of course you don't say what size PCB .
50 for 10 inches by 6 inches 10 off.

Despite them being Chinese I usually get pcbs at my door in 2 weeks in the UK.
sales@sitopway.com
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Old 6th March 2013, 10:06 PM   #37
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That looks pretty good for that size, I might consider some larger designs. Usually I stick with 4 in square or less.
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