01-09-2009, 01:03 PM
TrainNut Wrote:Wow, lotsa good information there. I like the hypodermic needle idea... keep that as a backup plan. Since the family had to run out to Sonic for dessert, we stopped by Harbor Freight to see what they had. I found a little pin-vice that had 6 bits in the handle (most of which are the ones I need). I did see the big package of 30 that went up as high as a #60 but I also found a smaller package of 30 assorted bits. Trouble is, the smaller package is labeled in mm's. How do the two labeling systems interact? #'s to mm's? For instance, how do I tell what # bit a .8mm is?
You might be able to find a conversion table somewhere, but without a conversion table, the only way I know of to tell is to use a micrometer to measure the drills and compare. I did pick up a digital caliper from Harbor Freight a few years ago, and it might be sensitive enough to measure bits that small, but it would still involve buying the set and measuring the bits.