Mini Diamond TWIST drill
bits vs Mini diamond SOLID core bits
Over the last several
years that I have been selling mini diamond drill bits to Creative Jewelry
designers I have found that the diamond twist bits are just a tad more popular
than the solid core bits. Your favorite type would more likely depend upon the
kind of material you are drilling. The thickness and the hardness of the
material you are drilling would influence the type of diamond drill bits that
would work best for you. It’s a good idea to try both types to see which ones
last longer and gives you a nice clean hole. Sea glass is often much harder
than beach stones or pottery shards to drill.
Mini diamond TWIST
drill bits work much like an auger. This type of drill bit will lift the fine
silicon dust out of the hole as you drill. You should still lift the mini bit
out of the hole just a tad as you drill. A touch n’ go technique is
recommended. The thicker the piece of material you are working with the more I
would suggest using the twist diamond drill bits.
The mini diamond
solid core bits have very fine diamond segmentations at the very tip of the
drill bit. This gives you a little less diamond cutting surface. When using solid core diamond bits you need to lift the
drill bit out of the hole every few seconds to clear out the glass dust and to
keep water in the hole. Solid core mini diamond drill bits will usually have a
longer shank with just the tip doing the work. The shank size is usually the
same size as the diamond drill bits. I always insert the shank as far up into
the collet that I can. You want just
enough of the tip to penetrate the thickness of the material you are working
with. These needle thin mini drill bits can bend or break very easy. I just cut away the bent shank and continue
to use.
As a general rule the
thicker the material the slower speed you would want to use.. I find that the
middle setting on my Dremel rotary drill motor works just fine.
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