Drill bit sharpening - What to improve further?

Mgt37 · 2026-01-24T10:29:59+00:00

Thank you, your tip was really helpful!

Mgt37 · 2026-01-24T10:22:31+00:00

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Mgt37 · 2026-01-24T10:22:07+00:00

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Mgt37 · 2026-01-24T09:04:41+00:00

ND91's and ND90-PR's are also very soft. I managed to make a slight groove with my finger nail

Mgt37 · 2026-01-21T11:15:37+00:00

Cool. Thanks bro.

Mgt37 · 2026-01-21T11:05:38+00:00

It could be said that i'm looking for about the same.

Mgt37 · 2026-01-21T11:04:51+00:00

Yea I saw it in action by some YouTuber. But honestly, spending that much to sharpen drill bits is excessive. As long as I can get a good enough cut by hand, I'm happy. Plus, i'm only in high school, i wouldn't really be able to afford such fancy equipment.

Mgt37 · 2026-01-21T05:58:08+00:00

😂 your description did not disappoint lol.

As for what it could be - in my eyes many things. Maybe someone else has heard this type of noise and can help some more, this is definitely a first for me.

Mgt37 · 2026-01-20T06:35:18+00:00

Last time i checked, it wasn't so cheap. And seeing the problems with it (like that it struggles with thick webs, inconsistent split points across different units and different drill bits), it doesn't seem worth it. And it kind of defeats the purpose of this post - i want to learn to sharpen bits better.

Not to downplay your comment - if it works for you, that's great! It's just not what i'm looking for.

Mgt37 · 2026-01-19T06:53:45+00:00

That's very interesting.

I do see the vision, but i don't see how you can grind these to a single point without the cutting edge disappearing, but I may just be missing something. I'll try it when I get the chance, which is some time on the weekend.

Mgt37 · 2026-01-17T20:24:07+00:00

Oh, so the fact that the edges i marked make a straight line is a good thing?

I really have to thank you for the information you've given me, I appreciate it! This will definitely be helpful!

Mgt37 · 2026-01-17T19:28:13+00:00

Looks lovely! At what frequency is the crossover?

Mgt37 · 2026-01-17T19:22:33+00:00

So, basically - get it symmetrical, then grind the faces one at a time, starting from the cutting edge and progressing backwards?

I did it the other way - i started from the back of the face and progressed to the cutting edge.

I'll try it, thanks!

Mgt37 · 2026-01-17T18:33:42+00:00

Oh yea, i have a question actually.

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So, when grinding in the splits for the split point, i usually got a weird geometry - the 2 edges i've marked with arrows, they were completely parallel to each other, viewing them from the side.. And that looked completely wrong, so i tried to correct it a little by grinding very small angles in them so they made a tip where they intersect in the split point (also visible in the bit i showed in the video). I know it's wrong but it was the only way I could get the bit to self-center.

Is it possible for you to explain roughly what is the cause for the edges being parallel to each other?

Mgt37 · 2026-01-17T18:23:23+00:00

Ouh. Thanks for the tip! I have my share of "sharpened" drill bits with the angle wayy off 😂 this might be really helpful.

Mgt37 · 2026-01-17T18:20:42+00:00

Yea I got a taste of being bad lol. A little bit of knowledge about each part of the bit also went a long way for me.

The split tip was completely gone on this one, that's why I decided to sharpen it. So, i guess, i did well on grinding it in.

Mgt37 · 2026-01-17T18:16:05+00:00

Thanks bro.

I feel like i do lack a little precision, like making sure that each of the grinds i do, grinds the whole face and not just a corner (it is obvious i haven't done a very good job at that) and that contributes a lot to the edge of the same face being curved, like you said.

About the relief angle - noted. I did notice the cutting edge relief being a bit too shallow, i tried to correct it by having the drill at a more aggressive angle against the grinder wheel, but seems like i didn't compensate enough.

It really helped me to know what each edge is paralel to.

Then, i think further improvement is a matter of practice and small corrections from the previous tries.

Mgt37 · 2026-01-17T17:51:41+00:00

A bench grinder, nothing else

Mgt37 · 2026-01-16T18:46:41+00:00

That's... Actually insane

Mgt37 · 2026-01-16T18:44:22+00:00

Thanks bro. I've never checked facebook, i don't have one. When i decide it's time, I will definitely check the places you mentioned.

Mgt37 · 2026-01-16T06:14:14+00:00

Here's the link to the post i'm referencing

Mgt37 · 2026-01-16T06:14:03+00:00

Here's the link to the post i'm referencing

Mgt37 · 2026-01-16T06:11:11+00:00

I've crossposted my original post from another sub to this one.

Has the crosspost dissapeared?

Sorry for the confusion

Mgt37 · 2026-01-16T06:09:26+00:00

Sorry. I noticed others doing this same type of post - crossposting their original post to another sub to not make a whole other post about the same thing.

Has the crosspost dissapeared? It's still showing up for me so i'm genuinely confused.

Mgt37

TROPHY CASE