Hello everyone. I am trying to find a source for a micro twist drill bit set for my DSPIAE electric sanding pen. Because of the way the collet is designed it will only accept a 3mm round shank. I have looked online and nothing I have found lists the diameter of the shaft. And just to be clear it won't accept 3/32" or 0.11811. I have found some adapters with a 3mm shaft that accept different bit sizes, but I don't recognize any of these companies.
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is this what you are looking for?...
cnchome-beyond.com
Nano Coated 3mm Fixed Shank Carbide Micro Drill Bits 0.15–3mm HRC55 | BEYOND Tungsten Steel Drills for CNC Machining
BEYOND HRC55 micro diameter carbide drill bits (0.15–3mm) with 3mm fixed shank and nano coating are engineered for CNC precision drilling. Ideal for stainless steel, alloy steel, cast iron, and mold steel. Not for use with hand drills or bench drills.
cnchome-beyond.com
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They look great but the price is staggering. With conversion to Cdn$, they would be about $40.00 ea. plus shipping. I need at least 4.is this what you are looking for?...
Nano Coated 3mm Fixed Shank Carbide Micro Drill Bits 0.15–3mm HRC55 | BEYOND Tungsten Steel Drills for CNC Machining
BEYOND HRC55 micro diameter carbide drill bits (0.15–3mm) with 3mm fixed shank and nano coating are engineered for CNC precision drilling. Ideal for stainless steel, alloy steel, cast iron, and mold steel. Not for use with hand drills or bench drills.
Standard, common and very cheap drill shanks are 1/8" = 3.175mm. Is not your DESPIAE drill designed for this shank size? What shank diameter your caliper shows?
Here is example. Any size set you like. Shank is 1/8"
Here is example. Any size set you like. Shank is 1/8"
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Then I would put aside DESPIAE drill and purchased one accepting 1/8” shanks.
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I searched on Aliexpress "drill bits shank 3 mm" and there is a lot available for low price. I suspect you don't have to drill in steel, but only wood en soft metals.
Just so everyone understands what I'm talking about. Here are some photos of the unit. You will notice that the insert for the drill bit doesn't have the three fingers that a normal chuck would have. Instead there's an internal sleeve and 2 hex screws to hold your drill bit or other DSPIAE attachments in place. I have been using their sanding attachments for this unit and they work great. I have ordered the GodHand micro drill bit set from Japan. That should do the trick.
it's better to buy a cheap engraver with a three-cam chuck, and don't worry.
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I have a very nice Proxxon Engraver that runs from a 12v power supply that provides a variable speed feature. It came with a 1/32” diamond ball engraver. After using it for many years, I just discovered that it will drive any tool with a 3/32” shank. This includes a collection of old dental burrs.
I have had 0 luck using the carbide drill bitts. For US readers, I have a box of them, various sizes, that I will be happy to give away. Send me a PM.
Roger
I have had 0 luck using the carbide drill bitts. For US readers, I have a box of them, various sizes, that I will be happy to give away. Send me a PM.
Roger
well 3mm shanks arent standard. if you can remove the head, maybe you can adapt something better?
i found your product here...
dspiaestore.com
im sure its a fine tool, reasonably priced. but you can find other hand cordless drills in the same price range that take standard bits. standard bit sets are cheap... even if you went with dental burrs. that will save on tylenol searching for 3mm shafts and save a bundle.
i found your product here...
DSPIAE ES-P Portable Electric Sharpening Pen
Sharpen Anywhere, Anytime! DSPIAE ES-P Electric Sharpening Pen - Lightweight & Portable for Effortless Model Making.
dspiaestore.com
im sure its a fine tool, reasonably priced. but you can find other hand cordless drills in the same price range that take standard bits. standard bit sets are cheap... even if you went with dental burrs. that will save on tylenol searching for 3mm shafts and save a bundle.
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go with what you found. dont worry about companies if thats all you can find.
maybe get a chuck that has a shaft you can take down on a lathe?
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Same for me. They snap off very quickly in hand held drivers and nearly as quickly in my press. High speed steel bitts and a Dremel or similar with a set of different collet sizes is a good alternative for many for use with wood or metal.
Allan
No wonder. It can be said that carbide tools, being very hard and consequently very brittle, require ideal working conditions (stable, impeccable cutting geometry including “perfect” concentricity, no vibrations, preferably continuous machining as opposed to intermittent impact one, no or low side loads, etc.). If these conditions are not met, the cutting edge of larger tools usually crumbles instantly (which can sometimes be successfully resharpened), while the shanks of miniature tools made entirely of carbide simply break catastrophically in the blink of an eye.
It is true that there are different grades of cemented carbides, from harder, wear-resistant to more ductile, but in fact, under less than ideal conditions, i.e., in amateur DIY, they are all too brittle in practice. Steel tools, including the most convenient HSS ones, still remain the first and best choice for amateur DIY. There are, of course, exceptions to this rule, such as circular saws for cutting wood with carbide teeth, but this is due to the specific nature of these tools (a steel, i.e., flexible saw body and only small carbide teeth, and a relatively soft, forgiving material to cut).
Perfectly said!
Allan