How to use a D-Bit Grinder - The Basics!

This episode on Blondihacks, I'm showing the basics of how to run a D-Bit Grinder for making your own cutting tools! Exclusive videos, drawings, models & plans available on Patreon!
/ quinndunki
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[@ThisOldTony]

great overview!

[@adamduerr1203]

She took a cue from you at one point and talked emphatically with her hands. I was confused because I heard her voice and saw your mannerisms.

[@Blondihacks]

All the hand-talkers learn from Tony. I spent 6 months in his mountain-top monastery machine shop. Mostly hauling stock up and chips back down again. He assured me it was a spiritual lesson.

[@samcoote9653]

@@Blondihacks Did he teach you how to karate chop steel to size!? the ancient techniques!

[@DavoShed]

Sam Coote I saw The Cast Iron Gypsy punch out a metal disk with one blow of her hammer just the other day ;)

[@paulypaulypauly8011]

Blondihacks was it Ave or TOT? ;-)

[@greengohm]

Can we all stop for a moment and appreciate that Quinn is providing both imperial and metric degrees for all the angles mentioned in the video? ;)

[@d00dEEE]

I can't wait until she graduates to gradians.

[@andrewwilson8317]

Missed the bit where it changed to milliradians? Makes sense as way more accurate than old fashioned degrees ,minutes and seconds!

[@mpetersen6]

@@andrewwilson8317 Thank the Sumarians

[@Железняк-х4р]

Прекрасный, познавательный и полный урок по работе на этом станке. Огромное спасибо, с нетерпением жду следующий урок!

[@deanomec]

Having worked with people who are not very good at teaching has made me very appreciative of those who are. Excellent job on this tutorial!

[@MikeBramm]

Back in the late 80's, I worked at a company that made steel type for embossing/debossing the codes on the bottom of food cans (now these codes are printed with an ink-jet printer). I would cut the characters into the steel type pieces using a 3D Pantograph. The cutters we used were created by grinding away half of the end of a 0.250" carbide blank (just the one you had) using a cutter grinder similar to the one you have, then grinding a conical shape with a 0.010" flat tip. The resulting single-flute cutter would cut a 0.020" wide path in the into the steel to produce an embossed character.

[@andrewwilson8317]

Did very similar but we were using the tools on the Taylor Hobson pantograph to cut very fine gates and runners in injection moulding tool die sets. The pursuers were very high so everything had to be perfect. Solid tungsten carbide was used to make the bespoke cutters. Think there still some in the odds and sods drawer in one of my toolmakers toolboxes! Might come in handy some day....

[@CaptainSwoop]

This is a clear, concise, erudite (I googled that), bloody excellent presentation. You put a lot of thought and effort into this presentation ... and it shows. Top job - Thanks.

[@broglet2003]

I have watched a few D bit grinder videos but this was the most informative as to how they are used. Thank you.

[@jimsvideos7201]

I enjoy your videos because they have the same clear-headed sense of purpose as the 50s-era technical films, but with much higher quality recording and the odd interjection from Sprocket.

[@mikehoare1338]

hands down, best D-bit grinder explaination on youtube

[@donswords6671]

Most d bit grinder videos I have watched jump around a little but your methodical approach/explanation video was so helpful to simple me. Just got my beautiful old Deckel SO and you have removed the mystery, when seeing the machine for the first time. Thank you so much. One person commented they are fiddly but the process is pleasing to me as I am not in a hurry. Hopefully you will have time to video some advanced uses of the instrument. Cheers.

[@jasonboren9951]

MASSIVELY helpful to understanding the parts you were disassembling during the rebuild. Thank you!

[@fepatton]

Me during the previous D-bit grinder vids: "Yeah, this is cool, but I don't really see the point." Me during this video: "HOW WILL I LIVE WITHOUT ONE???" Great video as always. :-)

[@jhfisher60510]

Timing of finding this was pefect took my new cutter out of the box today! Very Very Helpful. Thank you!!

[@MattysWorkshop]

Gday Quinn, I didn’t know a single thing about D bit grinder and had no idea how they worked, your overview really made sense to me, I have a lot of trouble understanding things let’s say it takes a lot for me to get the pictures clear in my mind, now I have an understanding of how they work, certainly not an easy machine to master, thank you for explaining this clearly, I really appreciate it, Cheers Matty

[@DEburg-or8gb]

Best instructional video ever! No bs talking all info. Perfect

[@dalejones4186]

Hi Quinn. Thank you. This is exactly what I needed. I just bought a D-bit grinder and need to learn how to use it. I learn better in the show me type lesson. Thanks again.

[@GaryT1952]

Really well explained Quinn....now that whole restoration makes sense

[@brunosmith6925]

By far and away the best tutorial. These machines are very detailed, and can be very confusing to set up and use. I've been grinding my engraving cutters on a lovely old Scripta - bought via eBay - and no manuals or tutorials were available. So I learned through trial and error. But after watching this excellent presentation, I take a LOT of comfort in now knowing that the techniques I am using, are in line with Quinn's.

[@amanofmanyparts9120]

You, Quinn, are the reason I don't get anything done! I've sat here and watched/listened to you show me how to grind a tool that I'll never need, to do a job I'll never do, on a milling machine that I don't even have the space for ... Ggrrrrr!!!!!

[@billyhooks99]

I am not worthy of being in your presence. Totally impressed with this machine and your knowledge of how to use it.

[@Nf6xNet]

All this time while you were rebuilding that machine, I thought it was a drill bit grinder and you were speaking Canadian or something. Even though I already knew there was such a thing as a single flute cutter made from a half round, it didn't click that your grinder was for those. Now it all makes so much more sense! Also, I need a D-bit grinder now, dagnabbit.

[@terrytopliss6423]

Nice tutorial Quinn, when I used these types of grinder we used a coarser grinding cup wheel and then finished with a very fine wheel. Guess this shows how times change.👍👍👍

[@stu-po]

I looked in my bit box and found A-Bit. I've got some learning to do to get to D-Bit. This is a good start! Great Vid as always, nice clear explanations of complicated stuff. And A-Bit of humor. :)

[@davfew]

That was a excellent tutorial and went some way to demystify this amazing tool. Thanks Quinn.

[@britishreaction54]

A really great explanation of an incredibly complex (to me at least) subject. It still eludes me a little, but I feel I've come a long way due to your tutorial. Thank you.

[@rpavlik1]

Wow, so that's what all those joints you had to refurbish were for. Very complex but very "right tool for the job". Great video!

[@bluforcemotors]

I have a "DECKEL" Grinder you mentioned....but until now it was black magic for me....(have tried some experementials with it, Resharpening etc)....now i will have a closer look to this great machine....the key is to FULLY understand all the functions, then you can use the Magic of it....thanks for the Vid and regards from Germany :)

[@benkeller3]

You are indeed a great teacher. Thanks!

[@Rangemaster26]

It looks like a baby Monoset grinder. I used one of those for several years while I was working in the grind room of the aerospace company I was working for. Those were amazing machines... you could do anything on them. This D-Bit grinder looks like everything anyone would need in a small shop. Pretty Cool!!!

[@markfulmer8501]

One of the best videos presented on d bit grinder set up and use I've ever seen . Thanks

[@leighmackay7486]

You are a recent discovery for me, Quinn, and I'm compelled to express my appreciation. You are so cool! You're a clear headed and knowledgable communicator with a sharp sense of humour to demonstrate that you don't take yourself too seriously. How'd you get so smart?!!! Machinists rule. Love from Vancouver. Let's do coffee!

[@Blondihacks]

🇨🇦🎉

[@TidyThreads]

Got my new D bit grinder out the box last week. Test sharpened a drill bit and found that all the scales need to be set. The scales spin on the machine knuckle and can be set , I didn't know that and I ended up with one odd looking drill bit. Need to spend some time on the machine when I have some time. Very good video on the basics of the d bit grinder, Thanks Blondihacks

[@samrodian919]

Tidy Threads where did you get your new grinder and approximately how much is a brand new one. I'm here in the UK but I'd still like to know a ball park figure

[@TidyThreads]

@@samrodian919 Hi, Not cheap but it will pay for it's self once i learn how to sharpen carbide end mills. I got it from warco. www.warco.co.uk/metal-grinders/303371-universal-tool-cutter-grinder.html

[@siggyincr7447]

Nice explanation. I learned how to use these at the shop I did my tool and die apprenticeship and we did it mostly the same way you describe except that we did the relief of the bottom of the cutter with a rotation as well so the final relief you did wasn't needed. The main reason we used the d-bits was for work in harden steel and carbide d-bits did a great job even in 50+ RHC hardness steel. These grinders also do a good job of refacing the bottom of an end-mill if all you need to do is get rid of a dulled corner.

[@Blondihacks]

Oh interesting! Yes, that would be a good way to do the end relief as well!

[@larryschweitzer4904]

This is the 2nd time I've watched this video. Makes more sense to me now. Thank you.

[@bobclark4994]

Thanx for that! My D bit grinder manual is hopeless so your explanation helps a lot.

[@PaulMorley1]

Fantastic video Quinn! Actually one of the best, and most concise, explanations on the web. I just purchased the Shars single lip grinder and have watched this vid many many times. ha ha. I did make a bit of a bonehead mistake and ground a HSS cutter with the diamond wheel initially which i have since read is a no-no... Diamond for carbide, CBN and Aluminum Oxide for HHS. Thanks again Quinn!

[@lawrencerudner1734]

I am amazed at the time you spent learning about the various configurations of the similar but different makes of grinders. Thank you for doing that!I have had mine sitting on the bench for over a year but I will now how to at least start to use it. Not only did I learn much, but I finally subscribed.

[@JackdeDuCoeur]

You've inspired me. I could use a d-bit grinder to shape my right-hand fingernails for guitar picking. Proper shaping is essential for surviving steel strings. I can use any old kind of sander to clearancing my left-hand fingernails for fretting. Thanks!

[@AmateurRedneckWorkshop]

Very good tutorial. For a minute there I thought I was watching Robin Renzetti.

[@Blondihacks]

The highest praise! ☺️☺️

[@billstanley4819]

Thanks for making this vid. I own a grinder of this type and have not been able to successfully grind a bit yet. With your helpful information I just might make it happen.

[@fergusonhr]

I loved your vid where you sat in a chair and talked about your life's journey...you are extremely intelligent

[@glennstasse5698]

That was really good. Very well laid out and delivered! I would have bet my last dollar D-bit meant drill bit. Thanks for the good info!

[@jaybee7952]

Thanks especially for the radius/vernier info. Have been looking for help with that for a while.

[@neilleach5249]

Happiness is a How To video. Thank You.

[@kokopellie]

You do such a great job explaining things and I love ❤ you sense of humor. 🤗

[@avoirdupois1]

Great to see that machine working! All that hard works pays off. Love that demo of the surface finish. Great imaging!

[@dointh4198]

This was an amazing introduction! I've got a Deckel S1 and almost everything translates very well to this machine.

[@bigrick7108]

Some other uses for it are single lip spot drills for tiny spots. If it breaks off in the spot you can usually get it out easily. Tapered hexagon reamers. You are right it is all in the setup. But after some time doing it it is a great tool to have in the shop.

[@DavoShed]

I have not seen Dbit grinders in use before. This is a great video that I think explains the process really well. I have a small tool and cutter grinder than has a ball nose end mill attachment. My grinder doesn’t have all the swivel stuff of a full T and C but I wonder I’d I can get it to make a Dbit. As you said I now have enough information to be dangerous.

[@gordonmoore1838]

Thank you for your clear explanation on creating a D-bit tool. I have read the various manuals that I downloaded after buying a Chinese copy D-bit grinder but could not get my head around how to properly setup for each step beyond halving a broken blank carbide bit. Now I understand how to give it a try. 👍😀

[@ahwongwk]

very good machine use this 25 years ago.. can do grinding of single lip, end mill and drill with it.. very usefull.

[@RexusKing]

This machine feels like it's designed by Xzibit: Yo dawg, I heard you like slides. So I put a slide on your slide, and the slides are on a bar, which can slides too! I think you did a fantastic job explaining everything, I think I've already forgot 20% of what you said, but this video will be a great source of information for me!

[@beachboardfan9544]

Holy hell! The basics! D bit grinders are overwhelming

[@hansnoeldner1861]

Your instructional videos are truly superb. ❤

[@Reach41]

I have to quit watching this channel. Every new episode reminds me of something else I need to buy.

[@Blondihacks]

I own this damn thing because of Stefan’s video, so I know the feeling. 🤣

[@boostie1005]

@@Blondihacks Thought you would do this in a German accent.

[@Mtematiks]

This is general problem !

[@Mtematiks]

@@Blondihacks I understand the need of the grinder, after I purchased an Alexander panto-graph after watching Stefan channel 3 years ago :))) But it can be used for a LOT of sharpening and grinding tasks in the hobby shop :) Great video! Thank you !

[@MrJoeGarner]

I've been seeing that quite often myself, been off work for a few weeks so can't wait to get back on the job to get some of my wants for the shop.

[@phildcrow]

Thanks for the explanation, and great job on the camera work!

[@jimadams8182]

We have one of those at work to sharpen counter cutter bits. Cool machine!

[@larryschweitzer4904]

Another good site on the subject: The Tool And Die Guy. I have a Shars knock-off. I struggled with setting it up, actually still do. But on many things just using a commercial tool as a guide helps a lot. Also found that exact setting is not required. I can do quick and dirty set, grind and get away with it very often. The drill bit sharpening fixture that came with it isn't worth the time to set it up. You can just put the bit in a collet , eyeball the settings and be done in a short time. Spending a bit more time you can do split points on large bits. Bits cut great. I had some brazed carbide lathe tools that were dull. Was quick and easy to sharpen. Use dust collection & a mask while grinding carbide. As for lathe form tools, that gets to be a trickier thing. I know that you are not supposed to use diamond on steel, But, the Chinese wheels are pretty cheap and the CBN wheels are more expensive. Most of the time I just leave the diamond on and it has lasted well. I don't like the grit, dust, rapid wear of the Al-Oxide wheels. The very thin cut-off wheel is very fragile! I bought the Shars when they had it on sale a couple of years ago. The fit of some of the parts is less than ideal. The scales are crude. The instructions are --- worthless, look for the online Deckel ones. I added a second work light on the left, helped a lot. Would I buy it a gain?? Maybe.

[@Blondihacks]

Yes, the Tool And Die Guy’s series is what got me started with this machine. I shouted him out earlier in this series. Very helpful videos.

[@GunFunZS]

I appreciate the way you talk through your decisions. You're a very good instructor. I have almost none of this equipment and yet I make stuff. I know we've chatted before about your dad and his reloading well I do that too. And I need to make a debate for making a custom bullet mold. The debate will be basically half the profile of the bullet plus some relief angles. I'm having to cut this pretty much all by hand I don't have a fancy tool like yours but just talking through the angles and emotions makes that all easier. I'm thinking of me make the wood equivalent of a color block to hold the device so that I can make all my angles very repeatable.

[@mazchen]

Wow, what a crazy complex machine! Great explanation Quinn! Super clean video shots and editing!

[@DudleyToolwright]

This is going to be a popular video. I was not aware of how complicated these beasts were.

[@paulpipitone8357]

Robbin and Quinn two of the best minds on KZbin

[@Blondihacks]

Oh gosh- Robin has forgotten more about machining than I’ll ever know. But I appreciate the compliment!

[@ponkkaa]

With every video I see, I gain new respect for machinists. If the average person could see what is involved in your work, they'd be more appreciative and respectful of things mechanical. 😊💪👏

[@woodscreekworkshop9939]

This video will help so many people. 👍🏼

[@Blondihacks]

You kept asking, so here you go. 😁 Meanwhile, your last video got me to buy a 3M deburring/polishing wheel. It works so well!

[@pitot1988]

I have always want to learn how to use one, thanks Quinn!

[@keithjones8070]

Thank you Quinn, another excellent and informative video.

[@pjbaddict]

Great video, I might look at getting one to sharpen my woodturning chisels... 😁

[@1967Twotone]

I didn't realize I need one of these until now.

[@derek1ee]

I'm in the process of restoring a SU2 as well, so first big thanks to your video on the restoration. Now on the alignment dot - I think the indexing knob (with dot at 90 degrees) can be independently positioned from the toothed gear (? the one with dot showing thru the tiny window). Therefore, you can align them so that when the red dot is showing through the window, the dot at 90 degree mark is also on the mark.

[@dws_damiansworkshop]

Your explanation was so good, i already feel like an expert on these despite I have never used one before. I am now looking for getting one myself. Thank you very much :)

[@johnapel2856]

What a cool machine! So... it's for grinding D bits? What's a D bit? "Shut up John!" Did you hear that? Nevermind. Neat video. Thanks, and Meow to Sprocket.

[@AaronAlso]

Knowing just enough to be dangerous is my specialty, LET'S GO!

[@VoidedWarranty]

So helpful! Thank you! I think now I could get mine to do what I want

[@VoidedWarranty]

this helped a lot, so I came back again! I have a clone, and I'm missing that near 90 degree indexing mark. I actually suspect it's a similar spot on mine, but I also think my indexing ring is off by 15 degrees or so. Could you confirm if when you're in the 180 degree circle mode, does it stop right on 0? if so I'll reset mine to there. Whoops! I read a bit longer and that's exactly what it's doing. This is the only video on the internet that's let me solve this!

[@randynovick7972]

Heavens to mergatroid, I have been waiting so sooo looong for the tool grinding video. Nice! I'm going to have a sandwich to celebrate. Looks like you got a fist-bump from Tony, too! Sweet! Many thanks!

[@paulypaulypauly8011]

Wow - you’ve really done your homework there - Thanks!

[@andrewwilson8317]

The D bit comes from looking at the cutter end on, the single flat on the round shank makes it look like a letter D. Simple as that! So many of these out there, I have a Deckel version and it was used to sharpen cutters for a 3 d pantograph engraver. Not used much since going to indexed tools in the five axis mill.

[@AerialPhotogGuy]

Hi Quinn :-) I'm not completely familiar with the brand of grinder you own so I may be completely wrong about this but it looks like the 1st horizontal joint up from the axle has a protruding pin in the perimeter, if that pin is pulled out enough to clear the stop it should allow you to move past the 90° point (referring to the joint that you said only moves from 0° to 90° on that particular model). Mine will only move from 0° to 90° as well unless I pull that pin out enough to clear the built-in stop, then it moves an additional 25° or so (I haven't noticed how far it will rotate past 90°......yet). Thanks! :-) Joe

[@Blondihacks]

Nope, that’s not how this one works.

[@AerialPhotogGuy]

@@Blondihacks Hi Quinn, Thank you for your response! First, I just recently started watching your channel which means that I wasn't aware that you had completely rebuilt your single lip cutter grinder (D bit Grinder). If I had known that you rebuilt it, I would have realized that you would know exactly how yours is made. Having said that, please realize that my comment wasn't meant to undermine your knowledge, I was genuinely curious if there are clones out there that do not have that feature. Most of the clones I've seen do have a little pin just under the front of that joint that allows for an additional amount of rotation by a few degrees. Personally, I use that feature fairly often, I prefer to grind into the cutting edge rather than away from it, if I can, I try to avoid having to remove burrs on the cutting edge, I'm all for honing less and cutting more, of course there are times when that's not possible. As for not being aware of various features on our machines, sometimes we're not aware of them until we watch somebody else using a certain technique or pointing them out directly........ it seems the best way to do that these days is to watch KZbin videos :-D I've seen a couple seasoned machinist discover a new feature after many years of using their own machines, if we could only get detailed videos from the engineers that designed and built them :-D Thanks again and have a great day! Joe

[@rodbennett4790]

G'day Quinn, I bought a clone recently but haven't used it yet, so this video is perfect timing! I've watched other videos on the topic but never really got it. Now I get it! Many thanks and I look forward to more. Sharpening drills, end mills, taps, reamers?

[@Blondihacks]

You bet! More videos coming

[@keithjones8070]

Another excellent video Quinn. Your videos are very informative. I have been learning a lot, thank you.

[@flyingjeep911]

Knowing just enough to be dangerous is my life motto

[@briank9922]

Awesome video Quinn, thanks a million. I've been playing with my grinder for a few days now and I have one big question - In order to do a precise radius, doesn't the stick out of the workpiece matter? Eg. Doesn't the workpiece have to be EXACTLY over the centre of rotation? Thanks again.

[@KeithDDowning]

Wow! Great tutorial Quinn. I used our Deckel a few years ago, but haven't since. Great to get a refresh, if I ever need it. SUBSCRIBE.

[@Blondihacks]

Thanks for the sub! 😀

[@firebird8600]

Yay!! It's time for Blondihacks!!

[@firebird8600]

@Tom Faigle Same here. I was following Quinn's blog during the Veronica build, but my computer let out all the magic smoke, and I couldn't find it afterward. So glad I found her KZbin channel.

[@davidlwhitesidearmy]

A great learning experience. Thanks, Blondi !

[@brilloestelar1]

Hi Quinn, Please, let me ask two questions: 1st.- Could you tell me the proper grain of the grinding wheel to get a good sharpening? 2nd.- I would like to know the measurements for the collet. I own an ER20, but it is too small, and I have an ER40 that is too big. Many thanks.

[@superchromat]

Thanks for posting this! Now I can watch Stefan’s videos without scratching my chin and saying “hmm. yes. grinding.”

[@7891ph]

I've sampled various videos of yours over the last several year's; usually interesting, usually very well done, but not often covering something I'm interested in. This one??? It's getting saved for reference; in the 30+ years I've spent in the machine tool trades (manual machinist, CNC machinist, CNC machinist/programmer) I've done a heck of a lot, but all of my precision grinding has been surface grinding, or free handing a one off with mixed results. I've seen these little grinders, and used a ton of custom bits produced by them, but every time I asked to get trained on how to use one, the generic answers were either A) "NOT YOUR JOB!!!!!", or B) "You're to valuable at your current job; we can't pull you off it to learn that...". I'm now on the lookout for one of these, for my own use. This is a machine, now that I have a basic background on how to use one, it will go into my personal tool box, just like my micrometers and indicators!!!

[@TrojanHorse1959]

Great video, presentation and explanations, thank you!

[@TheQwik512]

Good to know that Mr. Pete and I are not the only ones who need optivisors to see the work sometimes.

[@Blondihacks]

More every year. 😀

[@samrodian919]

What a brilliant video Quinn, thank you for the introduction to D bit grinding! Your commentary is precise and very understandable. I wish I could find one of these machines over here in England but they are like gold dust and so expensive. Keep safe!

[@MatthewRulla]

Excellent overview of a complicated and often confusing tool. Thank you, Quinn! I have a couple similar machines and your explanation and examples have helped tremendously.

[@Strawdog]

If you ever start to teach machining I would definitely sign up for classes Thank you for the videos

[@johnmcclain3887]

I've made dozens if not hundreds of "D bits" but have never seen a "D bit grinder, I didn't even know they existed. Thanks.

[@carlhitchon1009]

Nice detailed description. A big help. Thanks.

[@wesley115777]

@6:30, Quinn, how's the surface finish from that sharpened finger?

[@dennislarsson815]

Now get yourself a 2D or 3D pantograph and really start to use that grinder. Single lip cutters and square cutters for cutting deep ribs. I have several Deckel grinders like you are using and 2 Gorton units. The Model 375 Gorton can handle cutters up to 5/8 inch shank diameter. Those size cutters were mostly used on Deckel KF series 1:1 pantographs. My favorite pantograph and the one I use the most is a Gorton model 3U 2D. It can go from 16:1 reduction ratio all the way up to 1:1. A Deckel GK 21 can only go to a minimum reduction of 1.5:1. I do a lot of engraving work on the Gorton. Gun barrels, name tags, lots of neat stuff. It's nice to see some of the younger crowd actually taking the time to learn "the old ways".

[@xenonram]

I used to love watching Stefan do pantograph work. (I think Tony had one too.) That was so cool to me.

[@rameshbharakhada5497]

Your explanation is very good

[@randyjohnson7902]

Very knowledgeable and quite helpful. Jokes was appreciated LOL

[@toolbox-gua]

Let me go over all of it again, and again, and again. ... It is me who is not paying attention! Great video, indeed very well explained.

[@pcrengnr1]

Quinn thx for sharing. So, this machine also is a great fingernail shaper too. Hahaha. Very interesting machine. Wow, so, many degrees of freedom.