The days of manually modeling your end mills are slowly coming to an end!  Fusion 360 will now support all 14,000-plus end mills offered by the lead cutting tool brands Harvey Tool and Helical Solutions. These tools will now be available for download as tool libraries from the Autodesk website, eliminating the need to manually enter tool dimensions into the program and resulting in substantial time savings.

Small drills can be spun much faster than 1750 rpm, their small diameter means they need very high rpms to get their surface speed up. I'll check my micro drill press tomorrow and see if I can tell what it's rpm range  is....DaveB

I do the same with brushes, and all the hardware necessary for modeling use;it comes from the professionnal hardware, I never have regret to make the investment

Also, I have bought drill bits used for drilling PCB circuit boards and in CNC machines. They have a larger shank than a standard drill (helps reduce breakage) they are usually 0.3mm to 1.2mm (that's about a #81 bit to #56)

High-feed indexable milling tools for up to 5x faster feed rates. Great for roughing, slotting, 2D contouring, pocketing and more.

I should probably mention that DBCity has micro brill bits down to #79 and in metric down to .05mm (.0020").  Smaller can be had but ya have to call them.  And pay thru the nosehttps://drillcity.stores.yahoo.net/newmidrbi.html

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Yes quiet expensive, but durable, to not say indestructible in modeling use; the milling cutter have more than 30 years of heavy use and they work better than any Dremel new one or similar modeler offering.

This tool enables precision cordless engraving anywhere by anyone. Users ... engraving in glass, metal, ceramic and plastic. An aluminum body offers ...

"I can not find my machinist guide at the moment, but as I remember for small bits 1750 rpm is much higher than recommended for these materials"

If you are looking to get the most out of your time and money through more efficient production, but want nothing less than a beautiful clean edge on your ...

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I don't really want carbide bits.  They are sharp and can last, but they are extremely brittle - they will not tolerate any bending, you must use a good drill press with little runout (wobble) and clamp the item.

202354 — The superfine grain size provides high hardness while maintaining strength. What is Tungsten Carbide Made of? Cemented carbide is a material ...

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The products I have received from Widget Supply  https://widgetsupply.com/  have been good quality.  I have not purchased bits from them but they list High Speed Steel HSS bits in the small sizes.  They also have lots of other tools and materials of use to modelers at reasonable prices.

I get good tools from http://www.ottofrei.com - they specialize in jewelery making stuff. Prices are mostly reasonable, and I have found that most of the "unreasonable" ones are due to the products being significantly different than average (jeweler's saws being most obvious example). There are certainly other places, but they seem to have everything in stock all the time. Notably cheaper than MicroMark, for example, when they carry the same thing. Or sometimes at similar prices but better quality tools.

I tried the inexpensive high speed steel bits in a drill press, #70 bit at 1750 rpm drilling through a cast brass headlight to run wires.  It simply annoys the brass and does not produce chips.

The bits are first rate even the smallest one cut like a new; course they break like the other if you work not properly with them, the same with the taps.

Although I use several suppliers, because they represent several good manufacturers like W. L. Fuller, I usually buy standard drill bits from McMaster-Carr. They stock bits specifically designed for softer materials like aluminum, brass and bronze.

A #70 bit is quite large by microbit standards at .028" so it should be fairly robust.  I use a powered screwdriver with a micro chuck attachment to drill holes.  Not sure of the RPM of the tool bit it will drill through brass quite well!  Light steady pressure and let the bit do the job.  The last set of bits I purchased were labeled for "welding tip cleaning". Twelve bits starting at #76 through #55 I think.  Sharp and rugged.

Got the first highly recommended by Jack Burgess in his video.  The second was when searching for really small dies.  Both are US companies if that makes any difference.https://drillcity.stores.yahoo.net/https://minitaps.com/drill-bits-wire-metric/

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2011127 — Straight-flute carbide drills with four lands and holes down the center for through-the-spindle coolant are often used in high-production ...

Sep 21, 2023 — High-speed automatic nail-making machines are designed for large-scale production of wire nails of various sizes.

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My bits (buy in Europe) comes from a professionnal jewelery hardware store, tap comes from a professionnal watchmaking hardware store, and all my little milling cutter from the dentistry hardware.

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I can not find my machinist guide at the moment, but as I remember for small bits 1750 rpm is much higher than recommended for these materials even when using 118°, "slow-spiral" bits. At the moment I do not have any #70 bits, but I have no problem drilling brass castings with standard 118°, #60 carbide or "slow-spiral" bits when running in the 400 to 900 rpm range. Slow going but very precise.