Personally I'd use some ball race drawer slides maybe with a return spring 
to allow the Dremel to go back up after you've pushed it down. They have 
around 0.1mm slack in them if you get some semi decent ones and will set you 
back a couple of your strange $ each

I've got a stack of precision ones here I got at a good price when I was 
intending to use them to make a basic CNC machine but went to proper linear 
rails and bearings in the end.

Dom
----- Original Message ----- 
From: "solarwind" <x.solarwind.x@gmail.com>
To: "PICLIST" <piclist@mit.edu>
Sent: Tuesday, July 28, 2009 7:54 AM
Subject: [EE] Just bought some carbide bits & making a drill press


>I just bought some carbide bits from ebay. They're not too expensive (I
> think)
> http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=150350480017&ssPageName=ADME:B:EOIBSA:CA:1123.
> The bits are 1/32" with 1/8" shank. Fit perfectly in my Dremel. I'm
> going to make a very simple drill press like this:
> http://www.instructables.com/id/PCB-Drill-Press-Using-Salvaged-Door-Hinges/
> using a few pieces of scrap wood and door hinges (I'm going to look for


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