41–50 of 51 posts
“This video is not available in your country” Anyone have an alternative link?
https://yewtu.be/watch?v=gHR9YQl7ObU ..?
Anyone know how much these cost to buy?
Anyone know how much these cost to buy?
McMaster-Carr sells a 0.051mm drill bit (0.002 inch) for $25: https://www.mcmaster.com/8904A11/ Here's links to other other micro drill bits and micro end mills: - https://www.mcmaster.com/micro%20drill%20bits/ - https://www.mcmaster.com/micro-end-mills/mill-diameter~0-002...
What is the smallest drill bit one can buy?
They go even smaller than 0.1mm. McMaster-Carr sells a 0.051mm drill bit for $25: https://www.mcmaster.com/8904A11/ That's the absolutely small I could find, though I suspect specialty vendors have even smaller ones. You can find MMC's other micro drill bits here: https://www.mcmaster.com/micro-drill-bits/ My only experience with these was in school where we used 0.25mm micro end mills (like a drill bit that cut side…
Holy shucks... How are they even manufactured? I imagine they have really precise grinding tools to make the flutes..
BTW: Making small spade bits is completely doable if you have a lathe, stone, and screwdriver sharpening jig. I've done it myself down to 0.5mm but that smallest one was just an exercise...if I valued my time, it was a $100 bit of much lower quality than what's easiy bought for MUCH less.
Clickspring has an excellent video on simple shop-made drills: https://www.youtube.com/watch?v=N1aj_3tlQhU You don't need the lathe (though he uses one to rotate it for easy sanding, a drill chuck would work just as well), merely a stone, a torch, and some stock of appropriate diameter...you only need the lathe if you're starting with a shapeless chunk, and this isn't the stone age anymore! https://www.mcmaster.com/m…
BTW: Making small spade bits is completely doable if you have a lathe, stone, and screwdriver sharpening jig. I've done it myself down to 0.5mm but that smallest one was just an exercise...if I valued my time, it was a $100 bit of much lower quality than what's easiy bought for MUCH less.
For anybody who wants to try this themselves, or wants to sharpen drill bits generally, getting the concentricity of the point and the shank accurate is absolutely key. For normal-sized drills, at best you're going to drill an oversized (and likely tapered) hole. When you get into the smaller sizes, you're going to break bits left and right. For normal-sized drills an everyday drill sharpening gauge should do the tri…
I have been wondering about micro drilling in dental context. Is there any reason why root canals don't use microscopic drills instead of the current drills that make teeth weak, and need crowns for support?
...Because the very act of removing material leaves a void that makes the tooth weak? The method of making something hollow doesn't make it any less hollow.
-Emily
Earlier quoted context omitted.
They can be pretty small. I purchased this set sometime back. It’s served me well. Gyros® HSS Wire Gauge Mini Twist Drill Bit Set |Includes 20 Micro High Speed Steel Bit Sizes #61 to #80 | with Convenient Clear Dome Storage Case (45-22010) https://www.amazon.com/gp/product/B000SKVF8I . I frequently use a bigger size for fabricating reinforced epoxy with paper clips serving as rebar. Gyros Micro Drill Bit Set of 25#57…
Out of curiosity what do you use the paperclip reinforced epoxy for? Some sort of mold making?
What is the smallest drill bit one can buy?
[1] https://sphinx-tools.ch/en/catalog-products-eshop/drilling-a...