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Discussion in 'Pinhole Photography' started by ElrodCod, Jun 20, 2005.
Click here for bits in sizes down to .16mm.
another source I find useful
All well and good, but where do you buy a chuck for a drill press which can hold a bit that small? tim
A Pin Vise .
You don't use sub #75 drills with a powered impliment. They are too fragile. As mentioned above, use a pinvise and very little pressure. Helps if what you are drilling through is rather soft and very thin.
tim (pinholed) in san jose
Well, maybe it's just me, but...
In the time it takes me to decide which micro twist drill I want, figure out if I still have one that's not broken, get the correct tiny vial, extract one drill, chuck it in the pin vise, retrieve the other four from the table top before they can roll off on the rug to vanish forever, get another one out to replace the one that bent or broke when I dropped the pin vise to catch the escapers, rechuck, drill the hole, and (if I haven't broken the bit) put the drill away again, I could have made four or five holes with a needle and fine sandpaper or oilstone, measured them on my scanner, and chosen the best looking and/or closest to the size I need -- and not have used up/broken/lost ten bucks worth of micro twist drills...
hobby shops that sell to model railroad hobbiests will have tiny drill bits and pin vices. Check your phone book.
Don't confuse the issue with logic Donald.
timin san jose
Harbor freight sells a 50 pc. Carbide bit set of assorted mini drills and rasps....12.95 for all 50
Oh, sorry, Tim...
Donald, don't worry about those lost bits in the rug. A surefire way to find them is to walk there barefoot. You will find them in no time.
Only problem with that, Vet, is that (as a diabetic) my podiatrist tells me I should never walk around barefoot, even in my own home. And twist drills in the rug seems a fine reason to comply!
Fortunately, I don't have to worry about those little tiny drills -- never bought one. I made a pair of pinholes the other day that differed by about .0003" (that's three tenths of a thousandth) as measured on my scanner at 2400 ppi, both perfectly round, using a sewing needle in a pin vise and a razor sharpening stone with a couple drops of 3-in-1 oil. Took about fifteen minutes each, including cleaning off the oil to scan for size a couple times along the way. It's NICE not to have to compensate exposure between two identical cams -- and now I can think about stereo images, too...