0.25mm Fiber optic drill bits....

mspaw · Post by **mspaw** » Thu Jan 05, 2017 11:58 pm

Not having tried my hand at drilling for 0.25mm fiber optic im wondering if people are using 0.3mm HSS bits and dealing with the oversize or trying to use true 0.25mm carbide bits? I'm not finding options for 0.25mm HSS bits which im sure would be a bit more forgiving than carbide if they exist...

Any recommendations would be fantastic.

Thanks

-Michael

Kylwell · Post by **Kylwell** » Mon Jan 16, 2017 10:54 pm

Just buy #70 wire gauge drills bits. They're .25mm in diameter. https://www.widgetsupply.com/product/BEH99.html

Madman Lighting · Post by **Madman Lighting** » Sun Feb 26, 2017 9:23 am

I use #80 bits, less slop around the fiber.

Mr. Engineer · Post by **Mr. Engineer** » Sun Feb 26, 2017 8:16 pm

D'oh. And I went and bought these, where they did not pack it properly and most of the 0.25mm (blue) bits snapped. Yeah, the foam was not pushed and lock, so when they closed the lid.... These bits do snap fast.

https://www.facebook.com/PisceanWorks/p ... permPage=1

But Kylwell's idea is excellent

Kylwell · Post by **Kylwell** » Sun Feb 26, 2017 10:53 pm

Those are typically carbide and snap very, very easily.

Mr. Engineer · Post by **Mr. Engineer** » Mon Feb 27, 2017 12:02 am

Yeah, I should have bought those like you mentioned. But they go through plastic easily. Oh well, once I get through all of them, I'll look for the ones Kylwell mentioned.

Someone asked me to light up their Star Destroyer with 0.256mm FO. I am still contemplating. But not with these drill bits....

Kylwell · Post by **Kylwell** » Mon Feb 27, 2017 12:41 am

Carbide cuts like a hot knife thru butter until they snap.

Mr. Engineer · Post by **Mr. Engineer** » Mon Feb 27, 2017 8:07 pm

Sure is! The two holes took me a long time and I had to remind myself not to take any coffee before I start!

https://www.facebook.com/PisceanWorks/p ... permPage=1