Q&A 5 CHISEL EDGE vs SPLIT POINT DRILL BITS, stepped hole drilling, machining sequence of operations

[@robertos4172]

There are lots of how-to channels on youtube, but this is the only machinist channel that is truly a comprehensive course. The information, and insights are unavailable in any other single source. This channel should have at least ten times the number of subscribers.

[@firearmsstudent]

Needs more babyshark. Or Mrbeast.

[@ernerstowerdum3942]

100 times. Mr Mark is the one that explain theory and practice in real conditions. Other machinists are empirical mechanics or cnc operators that knows programation, but they cant sharp a drill bit

[@dwightcarlson7136]

Thank for continuing to do these videos. Learning a great deal. Also now appreciate how much there is to learn to be a machinist!

[@mossyhollow3732]

Lazy machinist is that way 🔄🇨🇦

[@Jayjam209]

I am sure you forgot more than I will learn about machining, thanks for sharing! Love your videos and instruction.

[@robertvanderdrift4524]

I listened to and read a lot of theory about how and why a drill cuts. Yours video explains it in the simplest and clearest way I ever met. Thanks a lot for that! Greetings from the Netherlands!!

[@outsidescrewball]

Great discuss/lesson

[@chuckfischer7202]

Thank you for all your work. Always learn something from you.

[@_Engr]

I just watched your vid abt the Lathe Machine and I saw this vid this yr its been 6/7 yrs ago but u havent aged a bit WOW!

[@MichaelGou]

讲的太好了！

[@drmrossing]

Thank you very much for the explanations. They help a lot

[@davew3014]

Thanks for sharing 👍

[@TheKnacklersWorkshop]

Hello Marc, I am definitely going to check out your sequence of machining operation videos... that is a topic I find most interesting... Take care. Paul,,

[@theshed8802]

I'm in Australia. Thanks for pointing out which way is up...lol

[@renebourbeau1671]

Hope all is well for you ,it's been a hard go for alot of us.best to you and yours,hope to see you soon.

[@dottified]

Your channel here is great -- very informative. Maybe you can answer this next question, which was prompted by your discussion of the customary chisel edge on a typical jobber drill. At what step in the manufacturing of a drill tip is the chisel edge formed? I'm trying to understand how the chisel edge ends up being a sharp line. For instance, would the process go something like this: 1) start with a cylindrical metal stock of desired diameter; 2) then grind/machine the helical flutes; and 3) then use some sort of special grinding process to form the conical shape of the tip, i.e., with the desired point angle. I can't quite visualize if this in fact would work to leave the chisel edge. What do you thnk?

[@THATLAZYMACHINIST]

Hi! You have pretty well described the manufacturing of a twist drill. The chisel edge is formed during the sharpening of the drill. Here is a video of mine describing the sharpening process. kzbin.info/www/bejne/o2fEhn9oqZxsn6M . You may also want to watch my video describing a twist drills parts and what function they serve. kzbin.info/www/bejne/fXrRdIKZipqca7c . I hope these videos answer you question. Thanks for watching my videos and for taking the time to write. Marc

[@quizzlerprofessor]

Hi sir your videos are really interesting , I'm on yours video how to read blue print part2 great lectures , really interesting

[@Moppemannen_mattias]

I have sharpened split points on my drill bits fore many years. It works fine.

[@thebeaver6596]

I got a question for ya. First thanks for what you do I’ve learned a ton ! I cannot find anywhere how to make 4 jaw independent chuck jaws. I got a few old Southbend lathe chucks at auction with no jaws. Everyone either says scrap them or “why did you buy a Chuck with no jaws” “if your a machinist.. make em” I’m just wondering how to make them I can figure out the serrations, but not the serrations with the radius.

[@stoneomountain2390]

Do mean the threaded area? For that you need the pitch, radius and shape of the thread. First you need a "milling bar" set with the correct diameter and profile cutter. Then connect a vice setup that can raise and lower onto the saddle. Hold the prospective jaws in the vice ( just rectangular blocks of the correct width) and run a normal acme thread cutting process.

[@davidharris5736]

Is it correct to say irregardless? Yes. We define irregardless as "regardless." Many people find irregardless to be a nonsensical word, as the ir- prefix usually functions to indicate negation; however, in this case it appears to function as an intensifier.

[@THATLAZYMACHINIST]

I tend to say "irregardless" because my (Montreal english) mother would say it that way. Since I know that both terms are accepted, I try to use both, I guess it depends on where my brain is that day (My dad is French Canadian so I am bilingual from the get go). It could come from the French "sans égard"? Since there is a lot of french speaking people who also speak english and in french you must put "sans (without)" before "égard (respect, consideration)". French and English are quite similar languages as you can see "égard" is part of the word regardless so it may just be that I and others are saying regardless in French but we are using English words. I am however not a linguist, I am a lazy machinist. Thanks for watching and for making me think this morning. Please excuse the quality of my english, as mentioned I am completely bilingual since I massacre both French and English equally. Just to emphasize the similarities, here are the words that are very similar to French in the last sentence: Excuse (exactly the same), quality (qualité), English (anglais), mentioned (mentionné), completely (comlètement), bilingual (bilingue), massacre (same in french) and equally (également).

[@ExtantFrodo2]

I thought the holes in the "V" blocks was to align a pair of them with a rod.

[@THATLAZYMACHINIST]

It could work if the holes where very accurate (which they aren't). I would however prefer to use the rod in the v groove since it would be the most accurate alignment of the two methods since the hole tolerance would have no affect. Thanks for watching and for taking the time to write, Marc.

[@ExtantFrodo2]

@@THATLAZYMACHINIST I'd have thought that they'd be made from one block so their alignment would be assured.

[@naqashabbasi6345]

Sir how to clamp a thread jobs and how clamp a small daia jobs on lather please make vidio

[@rogerdeane3608]

I am from "DOWN UNDER" could not help notice the sarcasm in the back grown sign so I gave you thumbs down.