Drill bits.

bluenos2 · 2026-02-24T21:30:55-0600

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.

paul ron · 2026-02-24T22:39:01-0600

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.

cnchome-beyond.com

Steef66 · 2026-02-25T01:04:07-0600

Better look on Aliexpress. I got there 2 sets of 6 for that price. There are more topicstarter here about that subject.

Steef66 · 2026-02-25T01:08:09-0600

Cheap drill bits

I bought these very cheap bits...

shipsofscale.com

bluenos2 · 2026-02-25T14:32:47-0600

paul ron said:
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.

cnchome-beyond.com

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.

Y.T. · 2026-02-25T14:40:43-0600

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"

bluenos2 · 2026-02-25T15:02:44-0600

Y.T. said:
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"
View attachment 580820

bluenos2 · 2026-02-25T15:04:41-0600

As I posted above, this unit only accepts 3 mm shank round bits.

Y.T. · 2026-02-25T16:00:00-0600

Then I would put aside DESPIAE drill and purchased one accepting 1/8” shanks.

Steef66 · 2026-02-25T16:17:42-0600

bluenos2 said:
As I posted above, this unit only accepts 3 mm shank round bits.

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.

bluenos2 · 2026-02-25T17:10:32-0600

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.

Winter · 2026-02-25T18:27:30-0600

it's better to buy a cheap engraver with a three-cam chuck, and don't worry.

Roger Pellett · 2026-02-25T18:50:24-0600

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