Toolgrinding: Micro trepanning tool
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- čas přidán 8. 09. 2024
- "Drilling Large Holes in Cast Iron with a Trepan Tool!"
• Drilling Large Holes i...
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"4mm carbide end mill that is no longer useful. I make those myself". Yep, Stefan, I make those myself too, in lots of different sizes! ;-)
Many of us do the same, following the immortal pioneering work of This Old Tony.
@@wwjjcc418
If it's just one corner that gets crunched it's an instant boring tool 😁
I will have to look into that as a manufacturing process, having never, ever made one myself. I have also never let the magic smoke out of any electronic system. .... Ok, I'm safe, no lighting. 😁
Outstanding video! Your timing was excellent. I was just thinking about small scale trepanning and wondering about approaches to it. Your photography in this one was especially good, as well.
Ah Quinn, you could have figured this one out by yourself, your are just that quick. Still, it's nice to watch a master at his trade and clearly this video is of a master.
Stefan: "I'm using a broken end mill... I made that myself" I almost spit my tea out. Thanks again!
That there is funny, no matter who you are.
Very nice work Stefan!
ATB, Robin
Thank you, Robin!
You got so close I had to stop the video and get my safety glasses. Great cinematography.
I always make sure I have time to sit down and watch one of your videos. They are worth every minute.
I’m not a machinist, I don’t have the brain for it, but I find your teachings fascinating Stefan. I learn a lot when you “dummy it down” for everyone to understand how something complex you make seem simple. Much respect my friend 👍🙏🙂
Ahh the production of the end mill blanks. I have only experimented with drill bits.
There is a whole wide world of possible materials, drills and mills are just the start. Case in point, files, I have turned these into something useful
I once was running a steep grooved spiral on the internal of a part on the lathe. It was howling away and I was ensured that the boring bar always made that noise. I wasn't satisfied with that answer so I inspected the cutter closely and found that the back side of the insert was indeed rubbing just enough to make a sound but not enough to ruin the parts. I ground the insert away on the back side of the cutter and to the senior machinists delight the boring bar was now silent!
Sometimes the chatter and howling are a simple case of too much over reach for the boring bar. When I worked nights I came in one time to finish up a job in the Jig Bore. The guy in days was using a 3/4 (19mm) bar to try and bore a 4" (101mm) hole about 5" (127mm) deep. Once he got chatter he couldn't get rid of it. Swapped out to a stiffer set up. And no problems. To be fair it was on a weekend and the guy normally didn't do jig bore work. It's not just tool clearance. The stiffer the set-up the better.
Stefan, love the rubber band idea. Seems like a great way to maintain preload against such tiny tools. Thanks for sharing.
3,8 mm been called a "large diameter" (even if in comparison) is beautifully in line with your work, Stefan! Awesome!
Thank you for sharing, I am just a hobby machinist, self taught. I build small model engines for fun on the weekends. Watching an expert trained machinist like yourself is really facinating.
Erstklassige Arbeit, Stefan. Bei so feinen Arbeiten zieh ich immer den Hut. Klasse. Bei trepanning fällt mir immer der König der Trepanner; David Wilks ein. So schade das er raus ist, aus der Branche.
Ja, seine Videos kenne ich, total irre was der machen konnte - Und dann auch noch in fürchterlichen Materialien. Schade, dass sein Geschäft wohl untergegangen ist.
Having recently got a D bit grinder . This certainly shows how tool design should be kept simple . Love the rubber band idea as well . Thanks Stefan . Cheers Ade.
"hogs off 0,1mm of material in 2 or 3 passes" 😂
That there is indeed funny. It got a laugh from me. 😅
Very nice, as always!
Cutting oil looks like olive oil.
Cool tool grinder.
Danke you!
Its Jokisch Alpha93 cutting oil, but its actually plant based :)
"I make those myself." :)
I do something similar - I make my own 2-flute end mills. It's easy . Basically, you start with a 4-flute end mill...
I've been mulling making a water cooler block for a power RF FET amplifier that I'm building. This looks like an excellent tool for cutting the heat pipes which the water will run by. I learn something new from everyone of your videos. As always, thank you Stephan!
the more machinists who are also involved in electronics i see on here, the more i want to get back into circuit design. two beautifully intersecting interests in my opinion
Your comment about reversible spindles encourages me to fit a a reversing switch to my Deckel S0. Definitely helpful for end mill touch ups.
Careful, they wheel hub needs a keyed washer to be able to reverse the spindle, otherwise the wheel might unscrew itself 😬
@@StefanGotteswinter Good point! Thanks.
Stefan is the true Jedi Master of precision machinists. Yoda's BIG brother !!!
Outstanding as usual, thanks for showing us inside YOUR world.
Very interesting Stefan, and a lovely surface finish for the scale. I guess another way would be to drill out the centre and insert a precision ground pin - assuming the parameters of the part allowed for it of course. Thanks, always something to learn here.
Yes, it did make sense. A very interesting video. And thanks for the Debolt-Saunders referral.
This was a very informative video--just great! There was certainly a pucker factor when you did the first test cut under power feed--I said "wow" out loud watching it as it dove in. Can't wait to try this on my D-bit grinder.
Don't get frustrated Stefan. You are starting to get the hang of machining and grinding!😁
At least good enough to pretend to be a machinist on youtube :D
@@StefanGotteswinter
Ah the old fake it till you make it thing! LOL Nice work, well presented, fun and informative to watch.
Thank you. I was just about to start making a tool the way I always have and I thought I will just have a look.... You drawing at 5:20 or so gave me everything I needed. Thank you.
I would love a follow-up video on how you measure your ID, OD, and depth to confirm what you cut is to the specifications!
In the real part it's just the cylindrical boss not a boss inside a pocket like this demo so you can just measure it with a micrometer. You should what the video making the real part.
That cut very nicely! It's satisfying when a cutting tool you ground yourself works so well! 👍
Nice job Stefan. I also use CAD in this way for tool making, works great. Nice tool and works great.
3:25 Robo-Stefan has become one with the CAD software! The rumours about German engineers were true after all!
I've made my fair share of custom treppaning tools for cutting O-Ring grooves in faces and internal diameters. HSS though
Thanks Stefan, helps a lot!
Awesome video,discussion demonstration
Very inspirational. This year is the one I'll learn to grind lathe tools, at least.
Stefan ,I always learn something from you . Thanks for making these videos
Thanks for sharing Stefan. Your video and mixing skills are superb. It makes the content even more interesting when we can see in detail!
cool to see that the 2D drawing, and some idea of tool geometry, lets you put together a reasonably optimized tool, without huge effort... "brain over brawn" 🇨🇦🐻🇩🇪
Thank you for yet another very informative and entertaining video.
The only problem now is, that besides other awesome machines, such as FP1, I am lusting for a tool grinder. I almost purchased one [in a terrible state] two or three years ago but somebody was faster than me.
Great a new video I was just watching the Vertex rotary table improvements from the back catalogue
finaly ! evening is safed ! thx stefan !
Alright! I'll watch tonight. Going to get pizza and beer!
Yea well done i think that may make a cool wood bit for some inlay 2" thanks for sharing all the best to you and yours from John in Texas
I am a Toolmaker but could never match your skill , but have still picked up tips for day to day ,thanks for the videos.
Blueing the surfaces before grinding. Such a simple trick and yet so useful.
This makes perfect sense, now that you've explained it so well!
I would have been afraid of snapping that tiny carbide tooth off, due to the stress riser of the corner. What I learned is that corner radius is not necessary if the cutting force is low enough. It takes experience to know how much we can get away with, thank you for sharing yours.
I have been watching your channel & shop tours for many years and have been inspired & learned so much from them, I have also bought many items that you had, and I didn’t and constructed some of your projects over the years. I hope you will view my shop tour in Cape Town and see how you have influenced it.
Well here you are putting those little pegs on with a rotary tool after all. 🙂
Super Bowl of T & C grinding 🏈
For a very quick and cheap trepanning tool purchase an annular cutter of the correct size and remove all the teeth except one. Example: To trepan or bore a .750 hole with clearance to prevent rubbing select a .6875 cutter. Again, leave only one cutting tooth. For hardened materials to RC45 use a cutter with carbide teeth. Always look for the simplest and cheapest way to do a job.
Thanks for this in-depth look at special purpose grinding, really interesting! 👍
I had guessed that the solution would be a tiny annular cutter. I suppose this is something like a single-toothed version of that.
Very educational, thanks once again
Outstanding job & thanks for the fantastic video!
Great video as always Stefan, thanks for uploading my friend! 👍👍
Making small parts and tools is just so satisfying.
My dad made surgical instruments and I was always fascinated. Thanks for sharing your work.
Thank you, nicely explained.
Great demonstration and nice work. Thanks.
That was incredible.
I learned quite a bit from this one as usual. Thanks for the video keep on keeping on.
You make some interesting stuff.
Great as always stefan, great surface finish from a hand ground tool, mine always look like hell lol!
Wow!
What a great tool design!
I like it! Well done! :)
what you could also do for the angled part: since you always go from the outside edge of the 4mm shank and this position is never changing no matter the rotation angle, just put a driven dimension in CAD from the outside circle perpendicular to the angled line. That way you get precisely the amount you have to feed in. If you don't have CAD it's not hard figuring out this dimension by some easy trigonometry. I can't imagine grinding up to an edge by eye can beat this.
Another excellent tutorial Stefan. The explanation of why you do each step is immensely valuable as well as the tips on how to avoid pitfalls in tool grinding are infinitely valuable. Thank you.
600 Kilos? Wow, that is phenomenal. Looks like a great machine that a talented guy could do micrometer class work the first setup. I have heard that it is still in demand, and carries a respectable price tag if you can find one. Super score! Reciprocal is the word that you were looking for. And your English is beyond reproach….excellent video Stefan. As usual!
Excellent video👍
"I'll be Back!"
Me too...
Awesome work as usual. Building the profile into the tool saves so much extra hassle in production and it's infinitely repeatable (ignoring the minute amount of tool wear)
Thanks Stefan
Sehr beeindruckend! Master work 👍
Woohoo! New video!
Exelent video!!
makes me want to make an extreme sized trepanning tool somewhere around 50 to 60mm
I had a job once where I had to cut the gear teeth off of a part where we needed to use the part from about 25mm below the gear teeth OD. The OD was around 450mm with the teeth around 40mm or so wide. Took a 25mm tall cutoff blade and ground a radius. Took the teeth off as a ring. The teeth were flame hardened to around 50RC. Turning them was not an option. Wouldn't fit in the OD grinder either. Sometimes you have to think outside the box. Because you have no other options.
Thanks for sharing and as always excellent tips that help us learn. Cheers
Very good job stefan and good video...thanks for your time
Excellent video,Stefan.Thank you.
Tiny adventurers from the Tinyverse. By: Stefan Gotteswinter.
Awesome. I will be using this technique. Thank you!
nice, thanks for showing the tool making process 👍
Great video as always👍
Ah Stefan, I've got it. You are working on prototype pivot milled in place watches. Very timely video .....
The only trepanning I have done was on the lathe, using a ground tool like this in the mill is very interesting. Still, I suppose you could have done this work in a lathe with the same tool, by offsetting the work in a 4-jaw?
Don't mention the 4 jaw. 🤫
Thanks for sharing. 😉👌🏻
What's your most important, or most used grinder in your shop and what would you recommend a hobbyist to look for if they could only get one, or assuming a rich hobbyist, what they should get first? Surface grinder, rotary grinder, tool & cutter grinder, d-bit grinder?
If I could only have one grinder it would be:
a) (given enough room) a surface grinder
or
b) (almost no availible space) a dbit grinder
@@StefanGotteswinter
Yes, you can do tool grinding on a surface grinder plus some OD work. Unfortunately used surface grinders have gone through the roof price wise.
YAY very impressive.
😂 🗣“I make those myself” 🥁💥
“I make those myself”😂😂😂😂
"... I make those myself" wow! me too! I am quite expert at making no longer useful cutting tools available for repurposing
thanks for sharing keep up the good work.
Neat.
Very Nice. 👍
Graag gedaan! 😀
No back rake on the cutting edge? Is this just due to the lack of cross section or another reason? Love your work mate. Keep it up
It could stand a chip breaker, did you see those long chips on the power feed.
love a good tool grinding video. :D
Good video as usual. How did you measure the dimensions of your feature for compliance?
looks like it may have been sharp! lol great work
"a carbide endmill that is no longer useful (I make those myself)" hahaha
Nice!
Cool!
beautifully done Stefan! was that 316 Stainless you were cutting?
"I make them myself" LOL