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Is there a Dremel drill bit (maybe diamond?) ideal for drilling very small holes in pebbles to make jewelry? Answered

 Is such a drill obtainable in Canada through Home Depot or similar company? How much?




5 years ago

FYI - you dont have to pay more than 50 cents for a diamond drill bit:

After having purchased many different shaped diamond point drill bits, I found a "flame point" bit on Ebay. It's the best one I've found. It has a point to enter the stone easily, and it goes into a cylinder that forms the hole. Of course you need to use a coolant, like water, and I also use the Dremel Drill press.


8 years ago

I haven't drilled a stone yet but I do drill glass. I use diamond bits from drillglass.com. They are expensive. $13.00 and up or cheaper if you buy multiples 6 for $68.00. To make sure they don't burn up I put the glass on a piece of clay in a plastic container. The clay holds the piece for me and doesn't allow the back of my work to "blow out" when I drill through. Add enough water to just cover the glass. I use a flex shaft with my drill bit or a cordless drill. Start a divet on an angle then drill straight up and down. Use a light pressure and when the water gets a cloudy swirl( debris from the piece I'm drilling) I raise up the drill to cool it and repeat until I've finished. If you find a better method please share.

You want a massonary bit,they are used for just such a purpose,of course they do make a diamond tip massonary bit also,but you dont need one,besides that diamond tipped anything are expensive.

You do want a diamond bit.   You can get cheap ones (which only have some diamonds on the outside of the bit and quickly wear off and you won't be able to drill any more)  ORRRR  you can find some more expensive ones that have diamonds all through out a matrix that wears away (kind of like diamond blades for concrete saws).   

I used to work in a lapidary store and we used a dremel with a dremel drill press.  Then we used an IV bag full of water and a variable roller clamp sort of thing on the line which would drip water onto the area.  It didn't take to long at all to drill a hole.   maybe 30 seconds at the most  but varied depending on the hardness of what we were drilling.   

If you have any more questions feel free to message me or reply to my on here.

You might also try using a brass rod about the size you want you hole and using grinding powder used in rock polishers.  You put a little powder on the rock and drill a little pour off the dust and repeat until the rod goes all the way thru.  This method is used to make holes in glass sometimes.

You can get grinding powder at science or hobby shops on the web.


8 years ago

I have tried to do exactly what you want without success. The diamond bit simply isn't up to the task. I was unable to make more than a small dimple on the stone before the abrasive wore out. I would be most interested if you hit upon a solution.
As for a cooling medium, unless you are using a cordless rotary tool, DO NOT use your Dremel any where near water. Sudden death may occur.
I use a light machine oil to keep my bits cool. A drop or two of 3-in-1 oil works just fine.


Answer 8 years ago

A tip for holding small, no-porous materials:  mix up a small drop of 5 Minute epoxy and glue the object onto a piece of wood that you can hold or clamp in a vise.

 You DO want a tiny diamond bit --however, the bit will get really hot and not work so well unless you keep it COOL. So-o-o-o as with glass drilling, place your pebble in a container of water (suggest plastic dish) with a small piece of wood underneath and drill through the cooling water. 
1. This will take a bit of time --probably 20 minutes or so depending on the size of the pebble.
2. Wood friction helps keep the pebble in place: you could also scoop out a holding area to help hold the pebble.
3. You will need LOTS of patience! Don't press too hard, let the drill do its work. 
SUGGESTION: holes are very time consuming. You might consider jewelry contact cement such as 527 or E6000.  They are same formulation except E6000 is thicker and harder to smooth and hide. For tiny stuff, 527 is the choice.


8 years ago

i bought a diamond bit at walmart for my dremmel for like 7$ However it's not tiny. I have the flex shaft attachment for my dremmel that takes the tiny bits and allows more intricate work.