Hello
I have found that they break easily
I used one just today to drill a very small hole into a thin brass metal boxcar step.
The hole size is about the diameter of a straight pin.
I am very careful?
I don¡¯t want to lose this drill size
For anything of greater metal thickness or tougher than brass, I would expect it to break sooner than later!!!
I will never buy more of these
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On Mar 23, 2025, at 2:33?PM, Mike Swederska via groups.io <MikeSscale@...> wrote:
? Harbor Freight also sells them. Due to breakage I only use them for plastic never brass.?
Mike Swederska?
On Mar 23, 2025, at 1:04?PM, Roger Nulton via groups.io <roger.nulton@...> wrote:
?
Bob,
You¡¯re right, those bits are great for avoiding the collet change. I have a small battery powered Dremel that is easy to control that I use them in. They are also very sharp! They are easy
to break, but so cheap that it barely matters. I used to get mine at train shows too, but those are nearly extinct now. I checked eBay and they appear to be readily available from China:?
Roger Nulton
?
?
I was changing a few mis. items in a drawer just a few minutes ago.? I once bought a box of carbide drill bits from a train-show exhibitor.? I think Micro tool people also sell the same thing--really just a bunch of bits (of
random sizes!) in a plastic box, but each bit has a fat collar around it.? I had thought that collar mount would save a lot of time just in not having to adjust the collet size for each bit change.?
I once tried to use them but it quickly broke.? I don't think I've tried any since, so to the back of the drawer they went!? I'm wondering if you gentlemen have used them successfully and how you deal with carbide bits??
Bob Werre
--
Mike Swederska
Meramec Valley Lines
Modeling Mopac equipment in 3/16
https://www.youtube.com/@mikesscale3149
Don't let perfection get in the way of good enough! Keep model railroading fun!
Roger Haag