I started grinding end mills with a #2 tool&cutter grinder back in early 70's I was retired up to 2019 ,now I'm grinding end mill again, your set up is simple and to the point,thanks for this video

@HaxbyShed

3 жыл бұрын

Thanks Albert. I had looked for a large machine drill grinder but everything was complicated and expensive, so I made this rig as a compromise. The geometry is not perfect because it only swivels in one plane but for all that it works pretty well and cost me just a bit of time for experimenting and to make it. Cheers.

I really like the jig you made it shows that you know how to think outside of the box. Thanks for the making of the video I know it's a lot of work!!

@HaxbyShed

3 жыл бұрын

Thanks for the comment Hank. I've tried to make a drill grinding jig several times in the past and never quite got it to work so this time I was determined to finish it. My first video was just an experiment really but now I'm getting a bit better with experience I'm really enjoying it. Cheers

This gadget is a winner. I have a small version of it but could not get it to play properly! After seeing your solution I'm going to have another go with it. I will build your big one too. Thanks for sharing.

@HaxbyShed

3 жыл бұрын

Hi Peter, I've tried to make drill sharpeners in the past and failed. The thing is, as you may know, the industrial ones have two actions to generate the shape - just like sharpening by hand. These 'one action' swivel types have limitations but I got it to work if I started with the leading edge presented at the rake angle and then swivel just enough to create the backing clearance. I've seen people on KZread swivel the jig back and forth right across the 90 degrees axis (perpendicular to the wheel) and honestly I can't see how that works. It took all the rake off at the point and the drills would never cut - they only rubbed. Maybe you can get away with that on small drills but not on large. Or you can pay a few hundred £/$/x and buy an industrial sharpener :-) When I get some blunt drills maybe I'll show the thing in action, but I've not been to the autojumble (where I usually get my blunt drills) since lockdown. Cheers

Несмотря на то что Вы говорите на английском языке, благодаря автоматическому переводу излагаете весь процесс заточки свёрл с очень хорошей и внятной последовательностью, которую я редко встречаю в таких случаях. Я это очень высоко оцениваю, так как говорю только на греческом и русском языках и только некоторые слова знаю на других, как английском, немецком, французском , итальянском языках. Спасибо Вам за качественную работу по созданию этого видео!

@HaxbyShed

Жыл бұрын

[Translation comment .... "Despite the fact that you speak English, thanks to automatic translation, you outline the entire process of sharpening drills with a very good and intelligible sequence, which I rarely see in such cases. I appreciate it very much, because I speak only Greek and Russian, and I only know some words in others, like English, German, French, Italian. Thank you for the quality work on this video!"] Ευχαριστώ Takis Papas, Я говорю только по-английски и немного по-японски, и, может быть, немного по-французски, поэтому для общения нам приходится использовать переводчик Google. Спасибо, что нашли время, чтобы прокомментировать.Ваше здоровье [Translation reply .... I only speak English and some Japanese, and maybe a little French so we have to use Google translator to communicate. Thank you for taking the time to comment. Cheers]

I have a Black Diamond [USA MADE] drill grinder, and it grinds off the side of the wheel like yours, I would not worry about side grinding, just keep doing it slowly., and use a mister [air/coolant] or just air to keep your bits cool and reduce clogging the wheel.........cheers from Florida, USA, Paul

@HaxbyShed

2 жыл бұрын

Hi Paul, thank you for your comments. I don't need to sharpen many drills so for what I do it's a good cheap compromise solution. Cheers

Better a drill bit than an axe to grind! Good video, perfect photography as usual. If you make plans, I will be glad to buy them from you. I am too lazy to go thru the concept phase by myself. thanks for the upload. I am afan! Bernard from Brittany.

@HaxbyShed

5 ай бұрын

I Bernard, I'm sorry but I did not make a plan. It was just head scratching and trial and error. The final setup was quite different from my initial ideas, just proving I did not understand the principles well at all at the beginning. The sliding distance adjustment between the drill face and the wheel was key. Tiny movements make a big difference to the rake angle. I don't know how the cheap small drill grinder stands work properly without that. Similarly I could not make it work if the drill swept past 90 - it just rounded off the cutting edge. Cheers

@bernardmauge8613

5 ай бұрын

I have a Drill pro sharpener made in the US. I bought it in Spain. Works perfect till 13mm.The rotation of the jig is is not circular . It has a small angle with a cam lobe to it to wrap around the tip of the drill in order for the outer edges to cut through. the problem is the surface area is too big for the wheel past 13mm. I still think yours would be the solution. How hard is it to brake into your garage at night? Do you have security cameras?@@HaxbyShed

@HaxbyShed

5 ай бұрын

@@bernardmauge8613 🤣 dogs and barbed wire, patrolling guards.

Excellent example for a home owner hobbyist how to build an affordable large drill bit sharpener. Thank you, I appreciate you're sharing your ingenuity. DRILL DOCTOR - I bought a 500X sharpener and I have the exact same problem, it does not cut a relief behind the cutting edge. The sharpened bits look great, however, without a relief behind the cutting edge the bits will not cut. Won't even cut wood! The Drill Doctor is a total waste of money. For me, as a hobbyist, I cannot justify spending thousands on a professional sharpener [and my wife would not allow it either :-) Building your sharpener is time well spent.

@HaxbyShed

Жыл бұрын

Hi WKelly, yes I was really disappointed with the Drill Dr. I'm sure I could get it to cut a back rake (relief angle) if I spent enough time diagnosing the problem. I've read the instructions until the print was worn off the page and sometimes I can get a bit of rake but not reliably. I think some of the DD models are better than others. Cheers

@wkelley4127

Жыл бұрын

@@HaxbyShed Before my Drill Doctor went out of warranty I contacted DD Support. I was emailed the same instructions that came with the sharpener and was told "try adjusting a little left or right of the setting". This did not improve the sharpening to cut. I lost interest in it again and shelved it. Sometime later, I contacted DD Support again and told them something may not have been assembled correctly and asked if they would look at it if I sent it back to them. I was told "sorry it's out of warranty and there is nothing we can do for you". The DD is junk and they know it. Nevertheless DD continues to make the sharpener and people continue to buy it.

fantastic....new subscriber

@HaxbyShed

2 жыл бұрын

Thank you Paul. Appreciated.

I really like how you have provided a platform to sharpen large MT drill bits. Have you ever drawn up any plans for it as I would happily buy them off you or have you contemplated making and selling them….I bags #1 spot in the line. For now I will stare at the stills and try to duplicate them. I am a believer and have subscribed so keep the good times coming

@HaxbyShed

2 жыл бұрын

Hi Gordon, there was no plan I just grabbed some bits and fabricated and then some trial and error. It was in my early days on KZread so there so was just the stills. I've been waiting to buy some more big (> 1/2 inch) drills to sharpen so I could make a vid of me working on them but none has come along yet. If I find time I might post 10 minutes on how I made it. Thanks for subscribing. Cheers

I like your videos, especially since you have limited room.(as do I). What do you think about 4 facet grinding on large drill bits(larger than19mm,3/4"). Hello from Houston!

@HaxbyShed

Жыл бұрын

Hi candeservices, nice to have your comment from Huston.👍 My drill press is MT4 and is rated up to 1 1/4 in (32mm) in steel. But I only have one drill ground with 4 facets - was like that from new. By chance It happens to be 32mm. Now I guess the real question is perhaps how would I grind 4 facets? I think by doing the grind in two stages and changing the distance between the wheel and the pivot, and changing the index position of the swivel limit I might be able to make some attempt at 4 facet. It would be tricky - but some experimenting might prove it easier than it might seem. I'll maybe think about it in the background as to how it might be done on that basic jig. Cheers

I suspect that this jig, like its commercially available first cousin, only grinds the drill to approximately the ideal shape. However, this is obviously sufficient, as your cutting tests show. Because the drill needs to produce a conical depression as it cuts, it seems to me that a jig that rotates the drill and simultaneously advances it towards the grinding wheel would produce a more correct profile. What do you think?

@HaxbyShed

2 жыл бұрын

Hi Chris, yes your observation is correct. The limited arc swing of my jig creates an approximation of the correct geometry. A professional drill grinder would push (advance) and twist - but they are very expensive for a hobby shop. Cheers

Have you thought about 4 facet grinding and split point?

@HaxbyShed

Жыл бұрын

Hi John, I'm aware of those but for the bit of work I do I'm happy to settle for a cheap solution even if it's a compromise. But in the background I will think about how I might add 4-facet to my basic jig. Cheers

Never saw it in action.

@HaxbyShed

3 жыл бұрын

True enough, but it does work. Maybe next time I buy an ebay job lot of blunt larger drills I'll video one one the sharpener. Thanks for the comment.

It has to much runout on stone Also vibrates so out of balance.

@HaxbyShed

9 ай бұрын

Hi John, it's a cheap grinder. I have tried to improve the fixing and balance, it's a lot better than it was. Imperfect method but does for most of my hobby jobs. Cheers

@johnpublic168

9 ай бұрын

@HaxbyShed the 24 dollar general fixture is better than a drill doctor I have an old lisle 91000 that bought use for 40 dollars does a wonderful job except doesn't do split point so am making a fixture to split the point. And do the 6 th facet.