Indexable parting blade and dbit grinding

[@ROBRENZ]

Excellent video Stefan! Lots of great nuggets in this. ATB, Robin

[@iTeerRex]

The D-bit grinder is such a versatile tool, almost as important as the lathe and the milling machines. Another great video, thanks Stefan.

[@roippi3985]

I mean I would totally watch your “Stefan drills a hole” series too

[@fredgenius]

I would watch 'Stefan makes toast' lol!

[@ulwur]

The 12-part series. With extended cuts for the partreons !

[@bfx8185]

First part Stefan will grind his own drill bit :)

[@Ale_Lab]

Totally!

[@PeregrineBF]

Applied Science's DIY EDM video is basically "Ben drills a hole in everything conductive he can find". I'd love to see what Stefan would get up to with such a setup.

[@MattysWorkshop]

Gday Stefan, I always like the way you explain things, very easy to understand and useful information, please keep the videos coming, I need to learn more, thanks for taking the time to do this, much appreciated, take care, Cheers Matty

[@ehamster]

“Don’t tell me about the import holders, I won’t buy from importers”. Also Stefan “let’s go to the Chinese D-bit grinder”. It’s always best to have flexible standards.

[@StefanGotteswinter]

Missspoke there: I dont buy from that particular importer. I dont have problems with import goods at all.

[@greengohm]

"These are my standards. If you don't like them, I have other" :)

[@EmmaRitson]

@@StefanGotteswinter you're way too diplomatic. I was thinking about this when you said it. figured I knew which importer.

[@2lefThumbs]

@@StefanGotteswinter also diplomatic about the brand of d-bit grinder that you have? 😉

[@sblack48]

He has many import tools, including his lathe until lately.

[@brucewilliams6292]

Excellent work. I have learned so much from watching these past few years. You have made me a much better home machinist. Thank you as always.

[@SamEEE12]

I am a simple man, I see a Stefan Gotteswinter video; I smash the like button.

[@wuddadid]

I think I've just found my favourite machining channel. I've watched this video from start to finish and I am not bored at all. I don't actually have any machining tools (yet) but I love learning about them and the techniques and explanations in this video are great and well-delivered. A lot of other channels try too hard to be funny ALL the time and it just gets old and they tiresome.

[@chrisstephens6673]

This one and The Renz are in competion to be the two best, plus Joe Pie of course and don't forget Mr Crispin. Most others fall by the wayside in comparison for teaching, rather than just showing.

[@wuddadid]

@@chrisstephens6673 Thanks for showing me these guys. Just subbed to them!

[@chrisstephens6673]

@@wuddadid you are welcome, four of the best. There are others but youtube will eventually recommend ones they think will interest you. I have a channel too but nowhere near their league but some find it of interest. (I hope)

[@wuddadid]

@@chrisstephens6673 Well I subbed to you just now so I'll be looking forward to see some uploads! RENZ's channel is INSANE btw. Such precision.

[@chrisstephens6673]

@@wuddadid i thought you would like Robins channel, who wouldn't? Thanks for the sub, i hope i dont disappoint too much.

[@lucwybo]

I had never sharpened a D-bit before and after watching your video, I went into the workshop and managed to make a D-bit after 20 minutes for a 30 ° dovetail on 6mm carbide end mill. Nice video with the correct explanation, Thanks

[@dalejones4186]

Hi Stephan. The way you teach and your expertise is exactly why I enjoy helping sponsor your channel. Thank you for sharing.

[@AmateurRedneckWorkshop]

Nice use of the Deckal grinder. A very handy tool.

[@captcarlos]

Thank you again Stephan! Half way through this video I rushed out and bought a 1/2 in coolant hose to make that vacuum clamping/positioning set up. You and Robin have this and that's good enough for me, much better than bailing wire I'm currently using! Any videos on the D Bit or grinding in general will be very appreciated.

[@jeffanderson1653]

You have taken your cutter grinder to new heights. I would love to have one but I just can’t justify the expense for a hobby guy. I always enjoy these videos. I learned today more about those inserts. Thank you for posting.

[@erikisberg3886]

I rewatched this video, again lots of good advice in here. I have used the same 2mm GTN2 inserts for decades, the type I use are good for aluminum to stainless up to about 40mm. I think they are ISCAR and seem to last forever for my prototype work. I picked up the regrinding insert idea in another video from Stefan, kicked my self for not thinking of that before.... I also bought 2 of the Chinese D-bit grinders 2 years ago, exactly the same, one for myself and one for one of my customers. Mine are C5 since I have all sorts of C5 collets for other machines. I agree the workhead is a bit clumsier but it has not been an issue for me. Perhaps I have been lucky, but mine are tight and hold tolerances well. Only issue was that I had to fix the workhead C5 clamping mechanism which tended to bind, but that was easy. One tip is to buy a 100mm CBN 150 cupwheel for HSS etc, about 30 euros from China. Cuts faster in steel and You dont get all that dust or the comment all the time not to use diamond on steel... which by the way works pretty well with the very inexpensive diamond wheels.

[@ranke]

I just watch your videos for relaxation and always love them! Being more of a wood and stone man I’m always fascinated by the precision you achieve! Thanks for the video!!!

[@dan4653]

Just received a similar tool grinder, so it was nice to see a tool grinding video. Thanks!

[@gregsmith2262]

I have been pondering how to do exactly the same thing for months now thank you kind sir for solving that problem.

[@jonsworkshop]

Nicely done Stefan, I definitely need a D bit grinder, very useful. "I need a pointier pointer," comment of the episode. Keep up the great work. Cheers, Jon

[@artmckay6704]

Thank you for the huge block of extra work that goes into every video! Your efforts are very instructive and very much appreciated! Thanks! :)

[@fredgenius]

Excellent video, many thanks for your time, and patience. Nice to see the d-bit grinder in use, and the entire project from start to finish.

[@2lefThumbs]

I've got a chinese d-bit grinder and hadn't realised the Zero was adjustible nor that the 90° ring rotated! I hope the manufacturer copied those two features from Deckel, eye-balling "parallel" and mentally adding a slight offset to my positions has been frustrating me. Great tutorial👍👍

[@EmmaRitson]

haha exactly. i knew there was a knob sticking out. didn't have a clue what it did

[@andrewdolinskiatcarpathian]

Now I need to pop into my workshop to see if my version of the Universal Cutter Grinder has that magic knob! 😂

[@alansmith8764]

Not all of the many variants have this feature.

[@andrewdolinskiatcarpathian]

@@alansmith8764 Indeed, as I discovered today, sadly mine doesn’t have this feature!

[@larryschweitzer4904]

I discovered that feature by pure accident. I had taken the machine apart to fix something else. Wish there was a good manual for these machines. The online Deckel one doesn't cover everything.

[@outsidescrewball]

Great video..discussion/demonstration/build....thanks for your time sharing...atb

[@roberthkack9633]

Thank you for this video! I have the same tool holder for my Multifix and now i know what to do with it instead of having it in an drawer put away and not be able to use it. BR Roberth

[@Veektohr]

No better way to start the weekend than with a cup of coffee and some Stefan Gotteswinter.

[@5tr41ghtGuy]

I can see it doesn't take long for the D-bit grinder to pay for itself when it is used to repurpose broken cutters. Nice video, and thanks for sharing!

[@twoprop8734]

Great detail and I like they that you include your reasoning. I learned a lot from this video.

[@robertburns2415]

As to the negative rake on the front of the insert, it must be remembered what holds the insert into the holder. That is the pressure that pushes against the insert as it cuts. If the tool is below the center line of the part the cut will invariably want to pull the insert out of the tool. The negative rake prevents that from happening.

[@orestkoroluk6430]

I believe that the clamping arrangement for the parting blade will work well. Someone thought about the design and upon reflection I can see the logic. The cutting forces at the cutting edge force the tip downwards. The clamping "gib" pulls up on the lower edge of the blade providing fullest support nearest the cut. The top edge of the dovetail will ensure that the blade is held with a stabilizing reaction like a see-saw. It appears to be a three point support system that inherently stable, much like a milking stool. It would be interesting to hear how well this arrangement works for you once you have had a chance to use it for while. You will always have the option of adding some screws to the top edge to change it to a more common configuration.

[@joopm7718]

Nice video I already learned how to make a 1 cutting milling cutter

[@masterbroadcaster]

"I'll be back..." LOL very nice content! can watch this stuff for hours...

[@adhawk5632]

I just bought a 100mm diamond wheel, 180 grit for the mill. I want to put some edges on some inserts. Ive got a couple of small machine vises and pocket angle blocks and a 12 x 6 mag chuck. Ill wipe dry and cover the mill with a bib of sorts. Vacuum and respirator mandatory. The X axis is 5um dro, is that fine enough down steps? And do you have any other advice that might help. Im all new to this and self taught hobbist, hoping get some small jobs. Were all lucky to have KZbin mentors like yourself, Robin and dozens more machinists. Ive been enjoying and learning from these older vids, Robin's older ones too. So much wisdom that myself and others would never have access to. Thank you👍👌🇦🇺 Congratulations on the upcoming 100K subscribers mark, thats a huge achievement in itself. Lots of filming and editing.💥🥳

[@bcbloc02]

Funny you commented I was thinking myself the next one of those blades you get won’t fit that tight precision slot. 😂

[@rprichard8452]

The next blade might be too big... that’s my luck!

[@RRINTHESHOP]

Nice project, should work great. Nice close up of the insert.

[@rickpalechuk4411]

Nice to see you giving the holder new life. Maybe you can do a follow up showing modification to the insert to give a positive grind, and the resulting difference in feed force compared to the standard negative grind. As always, thanks for sharing Cheers

[@Andrew_Fernie]

Stefan drills a hole👍 . Stefan grinds another D-Bit 🥱. Stefan mills a 1.35mm 15º dovetail to a sliding fit 💥 Now you're talking ! Nice work Sir.

[@lesthompson5907]

very good . i agree & often cut my larger dovetail's in the same way to making tool holders . making an inexpensive dovetail cuter . using HSS steel . Well-done it can de done by hand solong as you have a flat centre line. i often grind them by hand as i have not a fancy grinding tool like yours . I'm Gallus Ha - ha well - done son . les England a bite rough & redy up to your stranded i know , But you nailed it i liked the subject

[@googleuser859]

Very informative and entertaining as always, thank you.

[@piavigdalsgaard2230]

nice milling. nice grinding. and nice handwerk. 5 stars. Deutsche qualitæt

[@gregfeneis609]

Stay safe too Stefon. Thanks✌️

[@piavigdalsgaard2230]

its a good size Garant... 2.2 .. is usefull ... on the swiss lathes we always used 3.00 E ... IC 328 ISCARS 3.00 0.4 radius and the E ... alot ( they are excelent for turning backside of parts before cut off to sub spindle. I had them go 3500 with .15 in feed sometimes. ( pure oil with rocol RTD into the cut oil ) .. what a smoke bath .... but worked.

[@drevil4454]

Stehan can you please do a video on mill cutters? When to use carbide and on what material and when to use HSS and on what material, etc. etc. Also the amount of flutes vs material types etc, etc.

[@molnaromatic]

The sharpnes of the carbide insert is an interesting thing. In this csae the recognisable radius is a sharp (sharp enough) edge because of the momentum of parting occurs in the structure of a material. Therefore if you grind the insert you risk it to arrive the point when more sharpness produces more heat or chiping of an insert.

[@rprichard8452]

Very well done. I enjoyed your time. Thank you

[@drevil4454]

Man that's a nice way repurpose tools!! Hey you even get a ruler on your parting blade😆

[@argee55]

Another great video. Excellent close ups.

[@johngunn7087]

Thanks, Stefan. Excellent content, as usual.

[@EmmaRitson]

thanks. I learnt a lot as always. this is pretty topical here. same problems as you have.

[@adrianu5481]

Stefan, you're an artist!

[@howder1951]

Good video Stefan, lots of curious details for me to consider. You also generated an awful lot of comments, it took almost as long to read them as the video itself. Cheers and my regards!

[@mikemichelizzi2023]

Thanks for the grinder demonstration!

[@tombellus8986]

good video showing the grinding of the cutter. thanks

[@hanswurscht327]

Calibrator is back!

[@sirstan808]

Brilliant and informative as usual. Keep up the great work! Love it.

[@billchiasson2019]

That was a great video on thinking outside of the box!! Nice job!.

[@torerlendfgri2514]

Thanks Stefan. I really enjoyed this piece.

[@raymondhorvatin1050]

very clever thanks for sharing

[@richardbradley961]

THANK YOU AGEN STEFAN, VERRY INTERSTING. REGARDS RICHARD.

[@tmurray1972]

Excellent content.💯 The Arnold Schwarzenegger of machining, and yes you’ll be back.🇩🇪🇺🇸🤩

[@kurtg5645]

I love Engelbert Strauss workwear. They have some really really good trousers.

[@12345NoNamesLeft]

I appreciate it when you give us the inch translations.

[@TheTacktishion]

interesting topic. as always great camera shots....!

[@LittleAussieRockets]

Very nice 👍

[@jefflastofka9289]

I'd like to get one of those Holzmann grinders. Living in SouthWestern USA and looking for a source on the web. Haven't found it yet. I wonder how the Shars grinder compares, or other options. Maybe Stefan could put together a purchase option on some of the tools he likes for those of us who follow him and make a little commission on the side for his efforts. I recently bought some tool steel TIG rod after seeing it on a TOT video and it was funny talking to the vendor - they were buried with requests as a result of the video:-) Keep up the great work Stefan. We really enjoy it and learn a lot.

[@markassink8552]

Robin renzetti also has an import d bit grinder. Guess they all come from the same factory, but with different brands and colours

[@jefflastofka9289]

@@markassink8552 Good point. I had just started watching his video when you replied. The Shars might be a good choice here in the US where 5C collets are standard, and Robin has nice info on improvements. Maybe they're not the same factory. Maybe they take each others' products and copy the castings:-) I'd be happy with a machine that's just OK, and then tweaking some things here and there over time as part of the hobby.

[@bobengelhardt856]

What's that on the left side of the grinding wheel at 27:36? Ummm? Just how did that happen?

[@mog5858]

thanks for your time I have been putting off getting a good setup for parting as I did not have a good holder. I think I going to have to try and modify one of my holders just as you did and try grinding my first D bit on my grinder. keep up the good work

[@buckinthetree1233]

I love that style insert for parting and grooving but its also the most expensive insert I use. I bought some a couple of months ago, $150 for a box of 10.

[@Gottenhimfella]

You don't need to pay retail (or trade) - if you save a search on eBay they come up pretty frequently for not much more than half that price. Just make sure you stick with a brand you're happy with.

[@buckinthetree1233]

@@Gottenhimfella Thank you for the advice. Ebay is my go to for carbide inserts. I spent some time searching and had a lot of trouble finding them. I haven't tried saving a search though. Currently I'm operating with the right hand parting insert. I would like the left and center parting inserts as well.

[@MrHuntnfish]

I have loved Stefan's classes for years, I wish he would move to New Zealand, its safer, and marry a Kiwi girl, if nothing else just to lift the "Gene Pool". Thank you for taking the time Stefan.

[@mpetersen6]

Beats having to grind the cutting clearance and back relief by hand. I used to have to make my own counter bores from coredrills and twist drills on occasion with a surface grinder and a Spin DeX. They worked though.

[@stumccabe]

Thanks Stefan.

[@tomthumb3085]

Hi Stefan. I’ve never seen the value of that type of quick release tool holder as, by definition, clamping from the bottom will invariably lift the tool slightly, increasing the “stick-out” which is the last thing you want on a parting tool. Great video thanks.

[@angelramos-2005]

Great video.Thank you.

[@perw12345]

The googly eyes.... Milly McMillface

[@StefanGotteswinter]

Blame my girlfriend 😂🤣

[@geoffreyarchibald2680]

Vibration indicators.

[@jimurrata6785]

Crossover with Grady from Practical Engineering channel. 😀

[@EngineeringSpareTime]

Nice on! I got a 3mm parting tool from garant. Parting of C45 with it on my Wabeco D6000 is a nightmare. I should try a 2mm blade and the solid tool post helps a lot as well - doesn’ it? When I turned the spindle shaft for my DIY CNC from 42CrMo4 it went well, but like you said parting off is a hole different story..

[@TheUncleRuckus]

Great video as always thanks for uploading 👍👍

[@toreengemoen4484]

Nice video Stefan

[@russellhayward2359]

Lovely Saturday afternoon viewing 😁

[@bigbird2100]

Great video Stefan 👍 The angle 15° machined into holder would tweaking a degree or too create a greater holding grip just a discussion of interest 😉

[@Gottenhimfella]

It would create indentations in the less-hard item, in time. It is probably preferable to err on too steep, but in minutes of arc, not whole degrees. On a longer taper, though; on a short one like this, I personally feel there's little point

[@TomMakeHere]

*Token comment for youtube's algorithm 😉

[@canberradogfarts]

Groovey!

[@TomMakeHere]

Damn I can't say 'first' now

[@mftmachining]

Stefan, at 12.10 min is that a Karnasch Mill ?

[@lrakschmidt2880]

Why did you use this grinder instead of the Deckel? Just want to follow what you are thinking.. great video.

[@brianmckenzie1739]

Was your Multifix toolholder hardened through out - or just case hardened? At 20:26 re diamond wheel grit size, you say, "the smaller the number, the finer the grit". Isn't it the other way i.e. 600 grit wheel is much finer than your 125 grit wheel?

[@carlhitchon1009]

Stefan, great video as usual. I wonder why the manufacturer didn't put the clamping shoe right at the front of the holder?

[@wilcojuffer5940]

Hello Stefan, nice shirt you have but also very good video👍👍👍😉

[@cornnatron3030]

weird question maybe but is the grit for diamond wheels differently designated than for example sand paper and regular grinding stones as you mentioned the smaller the number the finer the grit but to my knowledge for sand paper or regular grinding stones its the other way around the higher the number the finer the paper or grinding stone and the nicer the finish.

[@StefanGotteswinter]

Yes. Theres different grit scales. Here, for all of your confusion, some added confusion: www.fine-tools.com/G10019.html

[@cornnatron3030]

@@StefanGotteswinter thats good to know about the different scales , even though the sheet you supplied is abracadabra to me. If i would need proper stone/diamond advise as a hobbist i drop by the local tool grinding shop who are always willing to educate to some extend. But thanks for thr info anyways

[@michaelpiotrowicz6100]

Did you need to cut a 15 degree angle in the little clamping block? Perhaps not with such a good fit. I would love to have seen you compare the geometry of the steel cutting insert with the aluminium and plastic cutting insert. Thanks as always. M.

[@BigBoss-rh7zq]

After seeing your original part geometry...i would move to the importer..:)

[@David-Rule]

Stefan, do you set that tool above center to compensate for everything flexing? Or how do you set it? On my 1943 South Bend 9-A I set it above center.

[@tomaszkazmierczak7327]

Have you seen grinding wheels adapters with a balancing mechanism? This is what I have originally in my dbit grinder and I wonder if it makes sense to copy this mechanism when making additional adapters - what do you think?

[@fly3209]

amazing that Gerardi modular vice ! but also extremely expensive....

[@CraigLYoung]

Thanks for sharing!

[@lohikarhu734]

only a Multifix is a Multifix ;-) Howdy Stefan, hope you are doing well? Planning to get my LLPV running again, soon(ish), and try out some threading!

[@Elektronaut]

32:00 Produktidee: Original gtwr Einkaufswagenchips 😉 Geschliffen und gehärtet natürlich

[@matttradie1341]

Waste nothing. Stephan, how do you keep the diamond wheel clean? I’ve bought one and have been using it to sharpen TCT teeth, but it appears to be either getting dull or it’s clogged.

[@tomaszkazmierczak7327]

Stefan, when one world like to buy Chinese clone of this grinder - what one should look at? I found one with 5C collet dos it matter what type of collets it uses?

[@andrewmorton9683]

Wearing non-self-extinguishing trouser material while operating a grinder is a brave move ;)

[@horkinyorkin]

that looks like a new vise on your mill ?

[@TomChame]

Very interesting, thanks.

[@sblack48]

Did you put a dovetail on the clamp itself? Great video.

[@tinker5349]

very interesting, a well made tool.