Awesome drill bit

[Loveall]

I didn't know this, but by happenstance I started using a new drill bet and it leaves a very clean edge on the jars for mycelium growth.

The outer edge of the drill bit is raised making a super clean cut in the lid.

This is probably already known, but sharing since I wish I had know this years ago. It may help someone else. Cheers.

 

[Voidmatrix]

Is there a name for this kind of bit?

Thank you for sharing. I want to cut cleaner holes in my jar lids and bins as well.

One love

 

[Hyper Turtle]

Looks like a regular wood bit to me. Next time i need to drill holes in a jar lid, i'll try those - i been using bits intended for metal, which don't make such clean holes for me.

They're not even necessarily expensive!

https://www.galaxus.ch/en/s4/product/bosch-professional-zubehoer-wood-twist-drill-set-7-pieces-drill-bit-insert-8424463

 

[downwardsfromzero]

It's a bit of a shame to ruin a wood drill bit. To get clean holes in sheet metal, a step drill (Stufenbohrer ) is helpful. For a smoother finish, be sure to clamp a bit of scrap wood firmly to the underside of the workpiece with thin metal lids like that, to guard against flexing.

 

[rkba]

Everybody that has an electric drill needs a step-drill bit. :thumb_up:

 

[Loveall]

Is there a name for this kind of bit?

Thank you for sharing. I want to cut cleaner holes in my jar lids and bins as well.

One love

Brad point bit, but as others have pointed out it is designed for wood and could wear out (which I did not know). I love the holes and I've made 40 today without issues.

The step drill bit DFZ points too could be better. I'm gonna try that, especially for my next monotub.

 

[downwardsfromzero]

For big holes in plastic (or whatever, really - you just need to match the blade type to the material), you probably know of a hole saw but I thought I'd mention it just in case.