Dbit grinder modifications - Part 2

[@AJBtheSuede]

I'm fairly sure you did a boo-boo CAD geometry mistake (at kzbin.info/www/bejne/q3W8aoGNqcqeqNU) when setting the angle for the flats on the end-stops... At least if I understand the intended usage correctly :) The range of movement should always be 90 degs? The flats on the end-stops should be parallel to the line between the excenter pin center and the body rotation center, they shouldn't point directly at the body rotation center. If the pin is 5mm, they should be tangent to a 5mm circle at the origin (body rotation center) Now you have a 90deg plus a little something range of movement when the excenter pin is at he furthest "out" position, and slightly LESS than 90deg when the pin is adjuste "in" towards the body center. Great video as always :)

[@StefanGotteswinter]

Yikes! Good catch, youre right, I just doublechecked in Cad. Thats annoying :D I just redid the sketch in Cad, the Error is about 6 Arcminutes at 0,5mm excentricity, which results in an linear error of 0,1mm on a 200mm diameter circle. I am trying to evaluate if that error will be a problem, but I think it will be fine-ish. Otherwise, I will have to get the pins out again. Thanks for having a second pair of eyeballs on the sketch.

[@StefanGotteswinter]

I just torched the pins out to re-align them. Will do a quick follow up video 🙄🤣

[@AJBtheSuede]

@@StefanGotteswinter Wow, OK... so about a micron max error on a 1mm radius grind :) For this tool/application the error was extremely small, I just thought you should think about this geometry when you do something bigger / with higher precision demands :)

[@StefanGotteswinter]

@@AJBtheSuede I am absolutely glad that you pointed it out. The fix was rather easy :)

[@levitated-pit]

what a great catch! it just goes to show " to err is human" and stefan is human enough to admit it publicly! (although he is still a machining God) chuckle.

[@JB-ol4vz]

Always a pleasure watching you work and explain in words I such a professional way. I'm having a hard time believing that somebody wold write bad things about you, I hope you don't taketh much notice of them. Thanks man.

[@64pol64]

Don't worry about shit comments, we all know that you do your best every time. I really appreciate your work, still going as you do. Thanks a lot Stephan!

[@joansparky4439]

Thanks for sharing as always.. and the introspective around 20:00 was just way too lovely. Keep up the good work.

[@mikescoffield4721]

Stefan, your series is incredible. Your using your knowledge and the equipment (which is old and reliable,thanks to your knowledge and expertise) produces amazing results. Well aware of time line and the ability to adapt to create a product on time. Fuck the people that judge your work. Well done. We all don’t live stuck to one machine. Your explanations are very well done, in a second language of all things. Thank you!

[@marianodiaz461]

I believe that the green locktite can be used on pre assembled items,waning that it will work by just putting a bit on top of the assembled pins , and itself will glue the pins by capillary action

[@bcbloc02]

That video from Robin the other day must have spurred you back into working on this project. I remember Robins d-bit grinder was quite tricked out.

[@ruedigerurbanke]

Yippeee, a new Stefan video!

[@kylewarren69]

YIPPEE!

[@eragonpower2397]

A new long Stefan video, that's what I needed, thanks!

[@MrRctintin]

Awesome, I thought you had forgotten about this project lol Thanks Stefan

[@StefanGotteswinter]

Its taunting me every day 🤣🙄

[@MrRctintin]

@@StefanGotteswinter 😂😂

[@mgbrv8]

Nicely done Stefan 👍🏻🙂👍🏻

[@lundysden6781]

Hey man, dont worry about the new negative comments. Life is too short, trust me if I know. Keep going!

[@carlhitchon1009]

What fun! Thanks Stefan.

[@OldtimeIronman]

Love another Stefan video! And Robrenz has a new one too! Party time! :D

[@drevil8519]

Rumor: Stephan buys a new toothbrush and trams every bristle before use.

[@bhoiiii]

In the spirit of the comment section: You did it wrong. Cheers man.

[@StefanGotteswinter]

I actually did :D

[@chrisstephens6673]

Dont listen to anybody telling you are doing it wrong unless their name is Renzetti.😂

[@StefanGotteswinter]

Oh boy :D

[@tommelomme6761]

Stefan! Did you ever check if the movement in the slot actually was 90 deg? Nice Video! Well done!

[@scottgard3278]

Keep up with the great work!!

[@smitmachinale8281]

Hi Stefan, brilliant work ofcourse, but it may be due to my bad hearing that while you were using the drillpress you mentioned looking on the DRO. I didn't know a drillpress has a DRO😀

[@StefanGotteswinter]

It has a quill-DRO ;) I have sawn apart one of my old mitutoyo digital calipers and put it on the quill.

[@smitmachinale8281]

@@StefanGotteswinter oh yes, that way. thanks for clearing that up.

[@Myrulv]

hindsight - the one and only exact science. 😂

[@wilhelmmmmm]

Sehr schön gemacht, von dir und deinen Videos kann man viel lernen. Deine Sachen die du machst funktionieren doch alle perfekt am Ende des Tages. Was will man mehr. Hast du einen Masterplan , oder fängst du auch mal ohne an ? Gruß Wilhelm

[@jan4094]

Wouldn't aligning the end of the slot with a bearing ball very much depend on the accuracy of the chamfer?

[@wrstew1272]

You actually eyeballed the hole location? I’m shocked!!😂

[@rossome3043]

STEFAN WHERES PART 3, 3.5, 4???

[@StefanGotteswinter]

not done yet

[@rossome3043]

@@StefanGotteswinter oh thank heavens....just so you know, I wasn't being rude it's just that I REALLY enjoy watching your content and I've already watched every video you've made multiple times around and I really wanted to see how the D-Bit grinder is coming along. Thanks again from Ross in Vancouver Canada 🇨🇦 😀

[@craigspicer4296]

Hi Stefan, Your channel is very interesting and your though process on your projects is something that shapes my order of operations when machining parts in my workshop. Your high attention to detail is something i am working towards as a hobby machinist. Thank you for your time and effort that you put into your content.

[@RagingShrimp67]

11:29 Aaaand demonetized....

[@vendter]

When checking the counterbore for a screw head, put it in upside-down, it will be easier to remove.

[@StefanGotteswinter]

Things i will never learn 🤣🙄

[@FCleff]

Stefan, I learn a great deal from your videos and this one is no exception. At 30' you show a new clamping system to arrest the rotation without the "bevel gear" affect of the manufacturer's design. If (and this is ONLY IF) you wished to retain a downward clamping force along with a radial clamping force, one could use a pin with a single bevel that registers against a mating single chamfered groove on the axel, similar to the clamping system used to clamp the tool slide of South Bend shapers and Southbend, Boxford and Atlas lathes. The adjustable ball handle with the pressed in ball would, of course, bear against the pin to lock it all together. This is just a thought, in no way intended to criticize the solution shown in the video. Cheers, F.C.

[@StefanGotteswinter]

Ahoi! True, that would be a very solid solution, I like that.

[@Jbomb-ep4jr]

“Because I’m stupid”….says the most brilliant machinist on KZbin! Lol Spectacular content as usual. Thank you. Stefan.

[@StefanGotteswinter]

Haha, wait for the follow up to this video. I messed up the pin alignment in Cad :D Thank you!

[@TrPrecisionMachining]

good job stefan..thanks for your time

[@danmenes3143]

The most acetone-resistant gloves I have found are polyethylene food service gloves. PE is pretty permeable, so I'm sure the acetone still diffuses through, but at least they don't disintegrate.

[@iteerrex8166]

I’ve been a sub since before the pandemic, and have learned alot from your nicely narrated pleasant videos. Thank you very much Stefan.

[@Mr.Avuncular]

Dear Stefan......I had to put a Ice bag on my head,my brain was melting! This was above my pay grade!😁👍 This is why I leave all this type of stuff to people like you. Respect👍

[@HanstheTraffer]

When we see something that may work better it's called DEVELOPMENT. That is a foundation of engineering. Nobody does it perfectly the first time.

[@Dane33781]

I always learn something from your videos. Thank you for taking the time and expending the effort. I have taught myself to weld and some machining skills and I wouldn't have been able to do it without channels like yours and the other usual characters. (Abom, Ave, this old Tony and others) Again, thanks.

[@StefanGotteswinter]

Thank you for the kind words :)

[@sjorsdewit9394]

Thanks for all the effort Stefan! Very enjoyable and educational like always!

[@patrickkelly2986]

Enjoy watching your solutions to situations. Renews my faith that there ARE intelligent people out there.

[@nicolaspillot5789]

How did you clean the bubbling/overflowing of the loctite ? Or not, if it did not interfere with the pin movement ? PS: I love how you analyze designs to spot their limiations.

[@StefanGotteswinter]

More acetone and some mechanical cleaning with a scalpel ;)

[@ROBRENZ]

Good stuff Stefan! ATB, Robin

[@jeremylastname873]

You explained the pin-striking-radius irregularities quite well. Two thumbs up. 👍

[@dannymaciejewski]

Hey, just need to confirm the spelling on “Renzettification” so it can be added to the Oxford dictionary. Thanks

[@vincei4252]

Hey Stefan! Hope the year of discovery is going well!!!

[@StefanGotteswinter]

At least i discovered 8 month old video footage on my harddrive 😄🤣🙄

[@vincei4252]

@@StefanGotteswinter hahahaha. I was just looking for Part I

[@bjornbursell7681]

Nicely done Stefan! My mind boggles on the thought of you take on the task of improving a quorn grinder :)

[@RookieLock]

I really love these modification videos.. Its great to see how a knowledgeable machinist would improve a product like this.. I have an old key cutting machine, just a cheap one that kind of gets the job done.. And I always wonder what some one with the knowledge would do to improve it.

[@jameskilpatrick7790]

I'm subscribed to probably close to 100 channels. Some great content, and very interesting creators. Of those, only about 3 cause me to just stop everything and watch a new release. Stefan, you are one of those 3. Thanks for all the great videos!

[@Hoaxer51]

Funny, I like to wait at least a few hours on Stefan’s videos so I have more comments to read. It seems that he draws a lot of viewers that share a lot of their knowledge in the comment section with very few, if any, trolls. Still hard to wait to watch them though.

[@pirminkogleck4056]

Sunday completed! thx

[@trebushett2079]

Matthias Fenner Toolworks, well, as Benny Hill once said 'so does mine' !

[@TheUncleRuckus]

I was wondering when you were going to get back to this lol. It's coming together nicely Stefan, thank you for uploading! 👍👍

[@spitefulwar]

Someday Stefan will make a video on "the quantum mechanics of tool positioning", I am sure. Addendum: I work at a trade school (Berufsschule) and suggested this channel to several of the teachers there. They totally dig this kind of content.

[@Arthur-ue5vz]

Thank you, Stefan! It's always a real treat to see new videos by you! I learn something every time. If it wasn't for shortages and insane shipping costs, I'd want to send you an entire sheet of self stick gold stars. You totally deserve them - and then some! I'm still waiting on my gold stars for some stuff that I've done..... not to brag, especially not since many of those exploits were by the skin of my teeth. Anyway, you are greatly appreciated and sorely missed when you don't post for a while. Thank you soooooo much for continuing to do and share this stuff!!!!! 😊

[@drevil8519]

I would pay a lot of money to see this shop in 20 years' time. Everything will run to a millionth of a millimeter.... even Stephan's heart will beat perfect nano second times.

[@glennstasse5698]

That clamping solution with the ball pressed in the end of the screw was really nice as was changing the 90 degree stop to carbide. All inspiring work! Thanks as always.

[@glennstasse5698]

I meant to ask why you think the original part was made the way it was. Your solution is SO much better at holding the shaft in place. The obvious answer is cost but isn’t this machine supposed to be a precision instrument or was “good enough” applied to balance cost vs. precision? Maybe the original wasn’t that great?

[@jasonh3109]

You’re amazing man! I just love your content. Your attitude. And your willingness to share your experiences with us all. Rock on man! 💪🏾👍🏽

[@danielkruyt9475]

Stefan, as a mathematician, I am deeply disappointed in you for calling the solving of a single-variable linear equation (finding the angular displacement) "trigonometry". There are no sins involved, you'd still go to heaven, so no worries!

[@StefanGotteswinter]

You might be even more dissapointed when I say, that my solution was wrong :D

[@tomcren59]

I believe that you are selling yourself short on not having sufficient skill or equipment. I always enjoy all of your videos and have learned so much.

[@henpemaz]

22:54 Same as acetone eating through gloves, it'll likely damage any filters in your camera lenses, careful when you send that stuff flying around!

[@StefanGotteswinter]

Yeah, I keep some distance. Usually free fall and sudden stopping kills more lenses in my shop.

[@stianskogstad4884]

Great content as allways 👌👌😊 I’m not a macinist, But find your videos very entertaining

[@barkerxsa7002]

Two channels fill me with joy when I see a new upload notification, TOT and Stefan - of course. (AVE fills me with joy and fear at the same time 😂)

[@warrenjones744]

Funny you mention that you might not of thought of one thing or another when in the shop at the time you recorded it. That often happens, after I get done with something. It becomes quite clear after the fact there was another often better way to get something done. Nevertheless it's done and working. It took me a long time to realize that it's the end result that matters and others don't always see things the same way you do. I try to remember that when I make a comment. Having said that, While the hard stop carbide pin modification is very clever and interesting. I really like your locking pin idea with the V shape. Something for me consider in future projects where such a device would be used. Cheers

[@MartinE63]

Great content but for me the sound level is way too low, I can’t wind it up any more! Subtitles have become essential.

[@StefanGotteswinter]

Agree, sorry - Sound levels are currently the bane of my existence. I am working on it.

[@Sven_Hein]

Won't the acetone weaken the paint after a while? If it eats through gloves and plastic it will probably eat the paint, too.

[@StefanGotteswinter]

Yes, but it will also flash off very quickly, usually thats not an issue if you dont soak the parts for several minutes in acetone.

[@barrystevens2780]

I purchased the articulating parts you are modifying separate from the tool clone grinding machine. I've planned on attaching them to a TGP shaft on my small surface grinder to be able to grind ball endmills. Any thoughts or suggestions would be appreciated. Thank you. The TGP will be attached to standoffs from the surface grinder movable slotted table.

[@davidsnyder2000]

Thank you Stefan for another great video. I’m not a machinist but rather an autobody man of 33yrs so I always learn new things from you to do things in my shop. After watching so many of your videos I wish I had chose a career like yours when I was younger. Your work is WAY more interesting than what I do. However I don’t know if I could handle the math and geometry. Especially with complex parts. Nevertheless, I always enjoy your videos. Super cool and fascinating to me👍🙂

[@kylewarren69]

Stefan, I am here to comment YIPPEE.

[@-redox-506]

Vielen Dank für deine Arbeit, die tollen Ideen und Inspirationen die du uns gibst 👍

[@dennissheridan1550]

I don't know how many years you've been doing this but I think I would be safe in saying that you are journeyman machinist by trade and that people who would criticize need to keep that in mind.

[@Cancun771]

I can still remember Audi painting actual cars in that colour ;-) Baby puke green. (The Opel equivalent was a kind of pus yellow, that was the colour of my parents' Rekord of course.) (None of these can be metallic finishes if you want the true classic look.)

[@felixar90]

Your skill level not high enough? That’s impossible! That would make the rest of us all bumbling fools. Ok maybe you’re not Robin Renzetti. ;) But pretty close.

[@magicbytes3835]

Hello Stefan, thank you for sharing your skills and great idea's with your interested hobbyist's, excellent work, cheers from me 😷👍👍👍

[@sblack48]

Thanks for repainting it and sparing us eye cancer! 👍👍👍

[@davidrule1335]

49:50 I had givin up on when you were gonna finish. And moved on to if you were ever gonna finish the D- bit grinder! LOL Good job Stefan! And that is a very nice drill press!😁

[@camillosteuss]

Your hands look like you have been hardturning or hardmilling... All those little inflamed spots... As a machinist, i wonder which chipmaking operation caused that... Or did you clean coolant with bare hands and the scratches got irritated by near toxic coolant? Also, most pleased by the video finally coming out... Not that i have a dbit grinder, as i said, after i saw you get a deckel s1, i picked up one aswell, so i dont really need a dbit grinder on its own... But the modifications always act as an inspiration and a learning aid, as 100 machinists will come up with 101 ways to approach a problem, and seeing yours can positively affect mine... All the best and warmest regards! Steuss

[@StefanGotteswinter]

Thats mostly hot chips - And wear and tear from climbing/bouldering :-)

[@andypughtube]

I have an Alexander grinder (Deckel copy) and the arrangement in this area is completely different. It's a lot more complicated and, in most ways, worse. The main difference is that there is a rotating intermediate layer which sets the upwards swing angle. The angle graduations are on this layer, so you need to use this to set an angle. This design has no way to release the constraint, so it can't (for example) grind a dovetail cutter. I have compensated for this to an extent by making a wheel arbour that allows me to grind on the back side of the wheel.

[@wktodd]

Snap. I'm thinking about making an alternative head to allow me to grind lathe tools , drills etc and fix the strange angle settings. I believe the gha machines were tailored to engraver use so perhaps they felt it was a better option.

[@StefanGotteswinter]

What you describe is 1:1 the original Deckel solution - I am not 100% sure why they did it that way.

[@andypughtube]

@@wktodd I haven't yet found anything that I can't grind by a combination of grinding upside down or with a reversed wheel. I was looking for a 3D model of the reversed wheel hub, but it looks like I might have just winged it at the lathe. It's weirder than you might anticipate. There is a hole down the middle to access a captive nut with a hex wrench. (made from the head of a socket-head screw). I don't recall why I did it that way but it might be that I simply didn't think of making a deep top-hat nut. Both are ways to get round the fact that the output shaft is short. There is a very brief glimpse of the reversed hub in action here: kzbin.info/www/bejne/fHvck6xufdh0nrc

[@hampdentime]

I really enjoy your videos. Just got a Deckle SO today. I had been looking for a couple of years but the price or condition held me back. This one seems to be hardly used. Now I would like to mount several wheels. The cost of adapters are crazy! Any ideas? Thanks

[@rizdalegend]

When you talked about the grinding wheel traversing back out and said its difficult to explain. The wheel is shaped like a cone from use and you are using the largest diameter closest to the part and moving out. Would that be correct?

[@StefanGotteswinter]

Yes. very correct!

[@TheJame951]

hi Stefan, I didn't get the adjective that you used at 18:29. could write it here, please. I'm very curious.

[@StefanGotteswinter]

non-brinellable :D brinellable is not a real word i think - It refers to brinell hardnesstesting, where a ball is pressed into the material to check hardness. "We" use brinellable for situations where something with a small contact area might damage another part by creating an indent.

[@TheJame951]

@@StefanGotteswinter interesting, thanks.

[@pipikr]

I didn't know that the 90° endstopp was ajustable :D Every Day i learn something new :)

[@wizrom3046]

Your new clamp pin design lost the ability the old clamp pin had to pull down the shaft against the body. I would think that is an important feature. Because the two body surfaces have a larger diameter, pulling them tightly together causes massive friction to resist turning torques. And cast iron is "grippy". Now if you are only clamping a small diameter shaft, it has much less integrity against turning torques. Unless I misunderstand something?

[@bigwave_dave8468]

There's a truism in all work that " 'better' is the enemy of 'done' ". Ignore the Negative Nellies lobbing criticism from the sidelines and rock on.

[@michaelhompus2475]

Around 11:30 the ball solution came to your mind to find the ends of the curved slot. That approach would require some extra math to actually calculate the end of the slot. I'd prefer a superglued 4.5 mm pin that you suggested just before that 'magic' moment.....

[@wordwyrd]

hey, when you were talking about comments, you really should have... ..just kidding.

[@mvadu]

Not a machinist, and may be a stupid question. Why we need the flat surface? You could use the carbide pin whole, and have the excenter pin touch it at tangent? Either way the surface area between eccentric screw and the flat pin or whole pin are same, right? Using whole pin will save some time?

[@first_namelast_name4923]

Very few of my friends have an interest in machining and mechanical engineering. So I am extremely thankful for your videos that let me see how other people solve small interesting problems in a workshop. Thank you for yet another excellent video.

[@MarkW321]

Thanks for sharing!

[@johnb6763]

This problem solving is great to see. It has helped me a lot.

[@timogross8191]

Coaches always are getting fired by the audience, that is normal. (I think) 🙂

[@lukerickert5203]

My SOE also fills in for a bench grinder. I have a Creusen and a Tormek but they take space and aren't needed very often so they have been sent to storage.

[@geraldguyette470]

Hi Stefan , that was very nice solution using the dbit to line up the stops . I love your attention to details , great job .

[@drevil8519]

You should've done the following..... disregard the wise guys and do what you do best with what you have.

[@bkoholliston]

I feel like I always learn something from the techniques you choose to show and use. I've owned a D-bit grinder for less than a year and between you and Robin, I have so many ideas for how to use it and how to maybe modify it in the future. There have already been times when I wished the work head was more rigid so I'm very interested in your modifications.

[@gyrogearloose1345]

Come back soon please Stefan! Thanks for sharing your work . . .

[@arjanvanraaij8440]

Watched 2 hours of the rebuild and modification of a machine without knowing the exec function of it.

[@richharr]

Your contribution is appreciated by so many people, dont let a negative comment or 2 get to you.

[@heinrichjantsch6344]

42:18 cut off twice and it's still too short 😉, great work as always! Thanks for sharing

[@ohhpaul7364]

there is more than one way to make a sandwich. you make your sandwiches however you want to. thanks for the information and ideas.

[@drevil8519]

If I was a very rich man I would hire you to build me a home shop. As usual I am flat broke

[@Preso58]

Thanks Stefan. I love that drill press clamp that you have. It looks like it's capable of some serious holding power. Your moment arm setup looks similar to the one fitted to the Quorn tool and cutter grinder. Cheers, Preso.

[@mgbrv8]

I…….love…….monoblock kopal clamps they are one of my fav tools

[@DudleyToolwright]

Nice mod with equally good explanation. Thanks.