How to drill harden steel
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- čas přidán 28. 05. 2024
- How to drill harden steel
Drilling Through Hardened Steel
In this video I will show you how to sharpen a masonry - concrete - hammer drill bits to cut harden steel
I will demonstrate drilling into hardened steel with a cheap carbide drill bit
this works well for drilling into knives or knife making
it is preferred to use a mill or at least a drill press but it can be done with a hand drill but I do not recommend it
In this video I share a quick tip on using a Masonry Drill bit to drill through a hardened Steel
easy and cheap way to drill holes into hardened steel
![6 Practical Drill bit Sharpening Hacks !!! [Subtitle]](/img/n.gif)
My shop instructor taught us that the fastest way to damage any cutting tool was to stress it thermally. I'm surprised that a fluid wasn't used to help transfer heat away from the cutting edges.
Thank you. As a woodworker I am not up on all of the ins and outs of steel. Clear and simple explanation of why and how to do this. Much appreciated.
Thank you Steve for your nice comment and thank you for taking the time to comment. It is much appreciated.
The little diamond wheels for your Dremel from harbor freight are quite useful for small jobs
Was hoping to learn how to drill hardened steel. Will keep looking.
There are small diameter CBN & PCD, (diamond), drum bits available which work well for both creating/modifying carbide cutting tips which don't cost a fortune & work nicely for making positive rake cutting edges.
One of my fav go to's for rough cutting steel, (when the piece won't fit in my saw(s)/shop is an ancient Skil 77 worm drive w/ a diamond masonry blade too worn to cleanly cut tile in my wet saw.
Been using them both w/ a an air nozzle for clearing slag & cooling for 15+ years; neither the 50 yr old saw or the 'dead' blade know the word quit.
A note of caution when grinding carbide, (or cobalt drills). Carbide contains cobalt.
Cobalt is NOT healthy for your lungs OR body.
I'm struggling w/ how to make a new diamond abrasive based grinder safe, right now.
I try to batch my carbide grinding to lessen the prep & clean up work.
I vacuum the grinder/saw & area before, during & after the work and wear a cartridge type respirator in the during & after phase, then go outside & blow off my body.
You don't want an accumulation of the stuff in your shop. Cobalt is mildly radioactive, but has enough 'buzz' to mess up your life, down the road.
Good vid, I've found masonry bits to come in handy, at times. I just saw some carbide tipped HSS bits on Ali Express for a good price.
Don't bad mouth Chinese stuff until you try it; there is some excellant quality tooling out there, at a fraction of US price. (CNC has been the great equalizer & put a turbo'd the improvement in Chinese products, compared to Japan's 20-30 improvement path, post WWII.
Great vid . As a Greenhorn in a machine shop as a lad . Boss gives me a hyd ram piston says cut in half . Friction saw and here you go . Did,nt tell me it was new and was playing trick .Thinking id be there for hours with a Hacksaw. Greeting from Australia
That is really good to know. This was an awesome video.
If anyone want's to try this, it's much cheaper to get a diamond circular saw blade.
It will be a bit coarse but will work to grind carbide into shape.
I've been using masonry drills to drill through broken taps and hardened carbon steel since the late 1970's, well before solid carbide drill bits were easily available (or affordable)
I do the same, even made a blade sharpener out of a old tile cutter as the speed is only 180 rpm
Same, worked for Caterpillar my job was removing broke taps bolts and studs.
@@bernardkinsky1637 Neat, probably works much better than mounting a circular saw upside down and spinning at high rpm
This was interesting. I'm 35 years as a glazier, and when the tile guys on jobsites started using the newer hard ceramic tile, we had a tough time getting through it with basic masonry bits. And we all broke tiles soon as we turned on the hammer function of our drills. So,we had to start using the carbide tipped spearpoint bits. These were and still are expensive, so I started using my little tabletop Harbor Freight tile saw which has a built in water tray to sharpen my bits. Naturally, other glaziers asked me to sharpen theirs, too. The smart ones, that is, who didn't want to spend ridiculous money on new ones for every job. Sure, I could have built the price of the bits into the quote,but where's the fun in that? I learned to copy the angle of a new one, too,so they would function well. If you sharpen them at a 90 degree angle, they just heat up and bust loose from their braze.
Porcelain tile ...use diamond bits
Thank you for explaining this. Bed frame angle iron was eating all my drills.
I’m glad that you like the video. Thank you for commenting and thank you for taking the time to comment. It is much appreciated.
you are reving way too fast.
use oil, if there is smoke slow down and add pressure.
i love bed frames. I blow a hole in them with my cutting torch...
Thanks for the easy to understand explanation. That makes perfect sense to me. 👍🏻👍🏻
thank you for your nice comment and thank you for taking the time to comment. It’s much appreciated.
Ray.
Ray, once again a very informative post, thanks!
I used these masonry bits to drill holes into bearing races. Works like a charm.
Great video, very simple and easy to follow and i liked how your focus was on both cheap & easy to acquire drill bits as well as the tools needed to sharpen them. Almost every hobbyist has a either a bench grinder or disc grinder.
Had never considered using the diamond tile discs for sharpening masonry bits to tackle drilling tool steel. If you broke a tap and needed it out, 3$ sounds like the bargain of the century for cutting it out.
Thank you for the nice comment and thank you for taking the time to comment. It’s much appreciated.
Ray
Retired GM shoprat. Worked near a ring gear tapping machine. Broken, in hole taps were "set aside", and later "arced?" zapped? and ??? re-tapped. This was in the Lansing, Michigan "Forge-Plant" #2 rear axle assembly of 1969+ era. This process was utilized on Saturdays=overtime. As it was 'Splained to me..... "too much time and machining was invested to NOT attempt a repair.
Would a cutting fluid of some type have made a difference in the breakage ? I am assuming that the bits get hot and that’s contributing to breakage , but just curious if in fact the heat does play a part and if you have used cutting fluid in the past .
Yes, cutting fluid would help all the demos that I’ve done in my three hardness , drilling videos were worst. Case scenarios just demonstrate the ability of hand, sharpening Concrete bits
If you have the ability to use coolant and air at the same time, that would be probably the best situation for most steals if it is an extremely hard steel, and you can increase the rigidity and use oil, if the temperature is not excessive, that would also be a really good situation
I hope this helps
Ray
@@shopandmath Had a former Alanson, Michigan friend who made fixtures for testing wiring harnesses. Their materials were "plastic-non conductive". Elmer LaTocha taught me to "PECK DRILL"= CUT AND REMOVE BIT, SPINNINIG TO AIR COOLTHE BIT, THEN "PECK IT SLIGHTLY DEEPER, AND REPEAT. Cuss-ed as I am I needed to "see what NOT, following this method DID! THE HEAT OF FRICTION DRILLING YIELDS A LARGER HOLE IN THE "PLASTICS' " MATERIAL. We as a society "grow in knowledge by "Paying IT Forward".
Excellent info, thanks
Impressed. Would be fun to drill some junk - discarded- no longer used safes. :)
I bought a pack of 15 each 5/32" Diamond Hole Saw Drill Bits from Amazon for $7 and used just one to drill out a broken screw extractor.
I drilled holes in 24,000 low carbon steel rings for a Chainmail shirt that I wanted to rivet. I went through dozens of titanium, carbide, and steel 1/32” bits (cleared the hardware store out a few times 😂), but many just dulled, so I’ll try sharpening some as per this video to get more life out of them! :)
Great video Ray
Thank you for the nice comment and thank you for taking time to comment. It is much appreciated.
Really good work man.
Thank you for commenting and thank you for taking the time to comment. It is much appreciated.
Ray
Excellent
Great video, thanks for sharing
Thank you for your nice comment and thank you for taking the time to comment. It’s much appreciated.
Ray
Very interesting. Nice work sir
thank you for the nice comment. It is very much appreciated and thank you for taking the time to comment.
Ray
Thanks fo sharing
Very interesting information, thank you.
Thank you for your nice comment and thank you for taking the time to comment. It’s much appreciated.
Ray
Thanks mate!
thank you for the nice comment and thank you for taking the time to comment. It was much appreciated.
Ray
I think a bearing right above the part would reduce the run out of the drill bit and possibly reduce carbide breakage.
you are most likely correct
The reason for me doing this is the type of videos that I shoot are one and done style
ideally, I would’ve he treated my own piece of material brought it to the hardness tester, but I’ve had people tell me that I swapped the material out which obviously isn’t true but still it kind of puts the I’m being scammed in the air so I decided to choose something which everyone can identify with and see. I understand that that’s hard because it’s an endmill
Thank you for contributing and thank you for taking the time to comment. It is much appreciated.
Brilliant! 👍
Thank you and thank you for taking the time to comment. It’s much appreciated.
Ray
very nice education my friend , thank you so much.
I’m glad that you enjoyed the video
And thank you for taking the time to comment. It is much appreciated.
Ray
When drilling hardish material that isnt harder than your hss drills, i find that grinding a small flat at the edge (so its a neutral rake/cutting angle instead of positive) will let you drill a lot of materials that would otherwise just dull your drill in a few seconds, its slow though, chips dont curl up and evacuate as well as a normal grind.
Obv isn't gonna go through actually hard stuff but its come in handy with materials that just wouldn't drill well but were softer than the hss
I do this to drill through saw plate, it's a cheap and effective option.
I always save broken carbide stubs sharpen them like a flat screwdriver adding the relief like a regular drill but much flatter 150 deg and run relatively slow never over 800
thank you for sharing
And thank you for commenting, and taking the time to comment. It is much appreciated.
The little things we save that most people would consider scrap can be quite valuable, especially if you resourceful
Just sharpen a negative angle on the tip of your masonry bit. It takes less then minute. Try it. You find it works just as good if not better.
thank you for sharing and I will have to try that tip. Next time I sharpen a bit.
Ray
You can buy them. Called Artu titanium carbide tipped drill. Clean holes through hardened files.
you are correct they do work well I have the ones from Milwaukee and from Dewalt both of those brands in my personal opinion I would still want to add more relief to the back clearance angle
Thank you for sharing and thank you for taking the time to comment. It is much appreciated.
iused to do this in the late 70s but forgot about it, thanks
You’re correct this trick is not new but it’s a good cost-effective way of producing holes and harder material
Now, you can buy bits from Bosch and Dewalt without having to sharpen them
what is the technical name for those diamond dressing sticks? when i do a search for diamond dressing stick i get all kinds of results. what is the material in the stick called? Thanks! I'll be dressing a Norton surface grinding type diamond wheel
I have used carbide tipped glass and tile cutting drill bits for cutting hardened steel without reshaping the bit.
I have a couple glass bits in my toolbox from when I was a little kid and I used to cut glass back in the day before we had all the fancy windows we used to have paint glass windows with the holes drilled in with the plastic handles to slide the windows open and closed
I was going to make a video on using those as well or using them as an option, but I just couldn’t bring myself to damage one of those tools because I’ve had them for so long
Thank you for sharing and thank you for commenting and taking the time to comment. It is much appreciated.
nice bro
Thank you.
you’re welcome and thank you for taking the time to Comment it’s much appreciated
Ray
Some useful video ideas are how to dial in a micrometer or how to grind drills
I graduated the course and struggled with these 2 topics. Great video tho!!!
I have videos on both of those topics.
In the how to read a micrometer, it shows taking a micrometre apart and what you have to do to adjust it to dial it in or reset
The drill making video is older one of the first videos that I created.
Good hearing from you Sawaab
Have you seen the new campus?
Note to self, buy carbide drill bits in the first place to drill through steel and consider jobber sets of common sizes. Got it.
When I use a masonry bit and sharpen it
I also do the leading edge that is the top part, as Those bits are never accurate in my estimation, and they never give me a true clean cut.
I sharpen them as I sharpen a standard HSS bit.
That is a very good suggestion. Thank you for commenting and thank you for taking the time to comment. It is much appreciated.
Hard or hardened, if I may. I've recently seen "multi-material" bits at home despot that are outwardly the same as the masonry bits, but they have cutting geometry ground into the carbide, where the masonry ones seem to be ground without it.
I have 2 stainless steel 1/4" bolts broke in a lower unit on a boat. Drilled through both bolts with a cobalt bit but then I broke a ease out in one of the bolts. So i got 2 more cobalt bits and 2 dremel cutters for hardened steel. Wish I'd known of this trick 1st. Now to destroy the bits and more than likely the dremel cutting tips.
I love this type of challenge
If you use a guide plate, you can drill the hole so precise that you can use the same quarter 20 taped hole
if you use a guide plate, you can drill the hole so precise that you can use the same quarter 20 tap hole
Let me know how this project goes
Ray
@@shopandmath I got them out with the dremel last night. Had to drill out hole to 5/16 but it's all good. It took forever to cut that ease out out. I can't believe 1 dremel bit done it though. Now to re-thread it tonight and then put back together and get back on the water.
@@michaelsheppard4227 In future if same problem, consider left twist drill bit. If broken bolt not too tight in threads left twist drill bit can back out broken bolt by drilling in reverse rotation.
I'm curious about the runout in the diamond grinding wheel on startup. Seems to present itself again during the dressing operation and also in the 8x footage you see it a bit as the drills is sharpened.
It’s a visual illusion.
It has to do with the bit rate of the video so when it speeds up and slows down it looks like it’s a wobbling
Great video. Thanks. There is another method of drilling hardened steel that I used when I was a teenager working in a Chainsaw Shop. We sold milling attachments for chainsaws and had to drill holes in the chainsaws bar to mount them. The tip of the bar was hardened in those days before sprocket tips. It was impossible to drill through them with a drill press. It just burned up the drills. So we used HSS drill bits in a hand cranked drill press that applied pressure via a large hand nut. Cranking very slowly while applying pressure, we could easily drill the hardened steel. It took a bit of time, but not as much as you might think. Regards.
a chainsaw bar is easy to drill with a quality HSS drill or cobalt drill. even a bi-metal hole saw. if not, you are reving way too fast. use oil, smoke means you are reving too fast.
thank you for sharing. It is much appreciated.
I do have on order a red hardness drillbit but apparently it takes six months for this thing to come from China and it’s like $200 for a 3/16 bit. It uses high temperature red heat to melt through the material which isn’t really drilling but when it comes in, I will make a video on that as well.
Hey this video is cool. Would you have any tips or ideas on best ways to drill out or remove. A broken piece of Easy out bolt extractor tool if possible Thanks 🙏
I would use the same technique that I used in one of my previous videos on how to remove remove a tap by using a guide plate
czcams.com/video/rSShHH2Us5Q/video.htmlsi=l5ookITZoDb7UuJn
Best of luck let me know how it goes
Ray
Subscribed
Thank you
Awesome pace and information density! I'm dealing with some kind of "undrillable" automotive unibody reinforcement sheet steel (around 14ga) which HSS does nothing. What's worse, they have to be hand drilled AND there are obstructions: will have to use either a compact right angle drill OR a 12" bit extension.
send metal has its own problems for drilling, especially where it wants to pull the drill in to the material after you break through the surface this causes the drill to slip inside of the chuck and damages shank
there are some tricks to prevent this from happening, such as reducing clearance or drilling with a negative rake
If the material is plated, or has a coding like titanium by trading, there are some bits available that will melt the metal, but I think that they’re only available with a Rigid set up and not compatible with hand drilling
When you can figure out how the average machinist can enlarge the so called clearance holes in 123 blocks (other than edm) you’ll become a world wide hero.
Thank you for commenting
Ray
I often need to drill a #6 machine screw body drill thru stainless, and HSS is not cutting the mustard. (pun intended. Sorry.) Do I just need better HSS, or maybe cobalt?
iF YOU would of used a vacuum cleaner nozzle chances are you would only need one drill. I have found that the chip load is what trashes the carbide tipped masonry bit. Also, different brand name bits have different grade carbide which one is better than the other. Just speaking from experience Sir.
You’re right on all accounts the thing that would improve the cut ability or quality of cut would be rigidity
This video in my other three videos on the same topic or design to show people that they can make these tool bits and cut harden material with very little cost involved and not that much experience
If you watched any of my other videos especially the shop tour video, I have access to millions of dollars of equipment but all my friends that are not in the trade so I need to make videos for the people that don’t have all of the high-end equipment this was kind of my Answer to those types of scenarios
Thank you very much for commenting and sharing. It is much appreciated.
Ray
@@shopandmath I will definitely check out the other videos. So nice to meet another machinist Ray like myself Vic. I can relate to your methodology and logic. I have helped so many people who also do not have access to high dollar machine shop. I have one for you Sir. You can take a HSS drill bit and harden it to drill right through just about anything by heat treating it in Mercury. The bitch is you will go through at least a dozen or more bits before one will survive the plunge and temperature shock. Thank you Ray you made my day fella. Good luck and peace to you Sir. Vic
P S carbide cement drills bits these days are really the bottom of the barrel in quality. They use to be really good when they were made in the USA. Years ago Ray. Over and out.
@@victoryfirst2878
Hi Vic
I’ve never done any heat treating with mercury we have a heat treating oven and it is only used in the tool and die apprenticeship and maybe a few other classes
One of the videos I was contemplating making, was taking a piece of heat, treatable metal cutting it in half making a turning tool out of 1/2 and machining the other piece non-heat treated piece into a shape to demonstrate the physical change of hardness on the same piece of metal
Again, thank you for commenting. It is much appreciated. Have a nice day.
Ray
@@shopandmath Good luck with your endeavors Sir.
Hmm going faster, with cutting fluid and light pressure?
I'll take that night and day. 🔥
Is it possible to just buy a cobalt drill bit for metal if I can't make it?
yes, it is possible to go to cobalt drill. They can be a little bit. Pricey, there are a few other brands that make carbide tip drills that drill freely. Milwaukee and Dewalt Bosch makes a set.
Carbide bit slowest speed you can constast pressure...had to do reapairs on machines many times
Do you have any indication of what type carbide is used for the bits?
sorry, I don’t know what type of carbide or grade of carbide is in these drillbits
I was just trying to demonstrate how for very little cost at home and you can drill through very hard steel.
I would’ve brought the Anmol up to the hardness tester to find out the exact hardness one. Unfortunately, we just moved it and it’s still in lockdown mode or transportation mode.
I pick those Drill bits up from the restore, which is the cheapest place. I could find they only cost me a dollar each no tax Canadian.
If you watch the shop tour video you will see that I have access to millions of dollars worth of equipment and an excellent environment to machine almost anything
my friends keep telling me that I need to make videos that the average person with the most basic tools can still drill out a broken tap or Harden Bolt at home. Sorry I couldn’t answer your question.
Ray
I think you mean hardened steel. To drill harden steel as a compound verb you could work harden it with the drill bit cutting edge. To drill hardened steel you can use a stellite drill, if you know how to use it. Carbide tipped drills are not adequate.
Is the shank part of the end mill actually hardened though?
Yes, this end mill is through hardened
I use cheap diamond disks on a Dremel. Can cut all kinds of hardened steel with cheap masonry bits.
What about a diamond coated drill bit?
It depends
They generally only do diamond coating real diamond coating on carbide. The diamond coating is a throwback from about 15 years ago. It’s a technology that they used on the space shuttle to deflect heat.
On high-speed, steel or cobalt it wouldn’t do anything
Think of coatings Like a chocolate covered cake those small Vashon cakes or Joe Louis the coating on the outside is hard very hard and the material behind. It is soft like a cake.
The backing material must be very hard and tough to hold onto the coding on the outside to prevent it from flaking and cracking off
I’m hoping that I explain this well articulated enough that you can understand what I’m trying to get at
Ray
3 bucks and a lot of time! Thanks
Why did you decide to use dry drilling? Wouldn't flood-cooling have helped avoid the breakages?
Coolant or oil would have been preferred
I was doing it on a drill press and didn’t want to make a mess
My parameters for this video
Number one
accessibility for everybody with limited tools (someone with a drill press, or hand drill and a grinder could make these drillbits for around $10)
Second
Pick material that everybody understood was extremely hard. Unfortunately, our hardness tester was in shipping mode from the move still
And I could not tell you the exact hardness of the material.
So I picked something that is easily recognized by everyone and they understand that it’s extremely hard.
Third
Demonstrate an easy and basic set up
I currently have three videos, including this one on drilling harden material.
Do you have any ideas for my next video?
Thank you for taking the time to comment. It’s much appreciated.
Ray
What's your suggestion to drill out harden steel bolts stuck in the frame of my Jeep?
For bolts, I would use a drill that has cobalt in it. Dewalt makes them and Milwaukee makes them unfortunately since it’s in the frame, you will have to use a hand drill
If you have a good drill sharpening skills, you should be able to do it with one drill no problem if you have difficulty sharpening drills and don’t have access to someone who does I would suggest getting more than one
I would also suggest drilling out the centre of the bolt, and using an easy out to remove the rest of the bolt
If the bolt still has a head on it, there are multiple ways of removing that using extractors which do not require drilling.
Wish you all the best let me know how it goes.
To stop the drill from wondering if you can put a Centre punch Mark in the bolt .
@shop and math , yeah...not only in the frame..but on the underside in the rear wheel well. In a very hard to reach spot of course. Thanks for the tips.
@@rmerrick123
A couple more ideas that you might want to consider
I don’t know if it’s possible to get an easy out or stud remover into the position that you’re trying to get at
I have used a Dremel type tool that has a 90° head to get into super tight spaces, then modified and easy out basically made it shorter to fit inside the tight space use an air chisel to place the easy out inside the hole
And removed it with a ratchet wrench
Best of luck let me know how it goes
Ray
Thirty year toolmaker, Carbide and turpentine for lubricant. Like butter
Wouldn't a cutting fluid be in order ?
I use a diamond hand file I purchased from Amazon to hand sharpen the masonry bits to drill holes in hardened steel. Also use a guide to keep the bit centered when starting the hole as a prick punch obviously doesn’t do its job.
I never thought of using a file.
Thank you for sharing. Much appreciated.
Ray
HSS Centre drills and spotting drills are also useless.
I have had good results using the diamond file on a Leatherman to touch up the edges on carbide tips - I've carried one on my belt for 35 years. If you need to reshape the carbide, the diamond grinding wheel wins.
@@russelldold4827 learn something new today I didn’t know that the Leatherman came with a diamond file. I will have to see if mine has one
Thank you for sharing
Ray
0:52 Stellite is not basically high speed steel. It doesn't even have iron/steel in it. Its tungsten carbide "glued" in a matrix with cobalt.
You are correct.
I am guilty of dumbing down my comparison
I was just trying to convey a comparison of metal that people would be able to understand
Thank you for taking the time to watch the video and comment. It is much appreciated.
Ray
Can you please do a “how to use a pitch micrometer”?
Yes, a pitch micrometre video is in the works but it’ll be a little while yet.
Thank you for taking the time to comment. Much appreciate it.
I've done the same thing. You need to lower the speed.
What? No coolant?😂 informative video: the width of the “spade” of each bit was not compromised in your modifications?
hardened perhaps? unless harden is some steel type i've never heard of.
Even if the cutting edge lengths are off by even a slight amount the drill will wander then try and bring itself back to the centre resulting in triangular holes and a broken drill bit for the unwary. In my course I barely passed the lessons on twist drill sharpening by hand. Our lessons were as good as what the instructors were capable of. In fact, all of our basic lessons on milling machine cutting bit sharpening and twist drill sharpening should have been an entire stand alone course rather than 8 total hours of theory and practice, & let's move on. My other complaint is that there was not one word on line boring, nor rigging which is a required competency for being able to function in any job shop.
HardenED steel
You should also use cutting oil .
Porque al taladrar, usted no usa lubricante para enfriar la broca
Sorry, translation isn’t quite working. I think you’re asking about lubrication
Depending on the temperatures and if the metal you’re cutting is work hardening. Then you will absolutely need lubrication mostly for cooling so coolant instead of an oil because this is a hand operation doing it in a drill press or a hand drill you generally don’t need oil. Hopefully this helps.
Ray
I have drilled many holes into harden steal using cheap masonry drills. [0-1] Rockwell Range of C65.
The end mill you drilled was "High Speed Steel End Mill Hardness" = Rockwell Range of C66~68.
* I only used very short masonry drills.
* I only slightly touched the "front face" at (90'), not removing any of the "brazing" holding the carbide insert.
* I only slightly touched the "top face" to make a sharp cutting edge. [Not Sharp]..
* You sharpened your masonry drill using (drilling non-harden tool steel) spade drill theory.
Drilling Hardened Steel With Masonry Bits
czcams.com/video/dWEN_MxhGqQ/video.html
* Video: [2:17/9:57] Spade Drill used to drill "soft steel".
How to drill harden steel
czcams.com/video/kX8Te5ch1Z0/video.html
* Video: [8:35/9:59] Shows a shattered insert.
* Video: [8:55/9:59] Shows drill chips coming out of the E/M center drilled hole. Drilling into a "partial hole" !!!.
VERY Dangerous Procedure:
* Video: [8:03/9:59] Shows using a "Very Long" masonry drill only having a 'soft cold roll steel drill shank'.
* Under extreme drill pressure, what will happen if the E/M rotates in the very small "V-Jaws" in the vice ?
minor correction: it is "hardened steel" - you left the 'd' off which confuses my dyslexic and OCD brian 🙂
this is the reason why machining time increases
heat due to shear and friction wears out the bit
How to drill HARDENED steel.
The exact name of the videos is chosen by the algorithm, including the spelling to get the most views
Seems a little bit crazy but it also works
@@shopandmath , I was speaking about the opening graphic. It also mentioned "Harden Steel." No biggie. Just a misspelling. Great information to keep people from burning up drill bits and work hardening their project material.
on hardened steel it's useless to grind a positive angle and it weaken the carbide tip.
a neutral angle is more apropriate. as well as for cast iron, bronze and plastics.
any materials in which you don't want to bite like a screw.
Thank you for sharing and thank you for taking the time to comment. It’s much appreciated.
can i buy a diamond drill ?
Years ago when I was in the industry, we did some military contract work and they had a diamond end mill it was used to machine Laser optical equipment for smart bombs
Honestly, I’ve never heard of a diamond drill. It is possible that they exist.
And could easily be made with some type of diamond insert, but I’ve never heard of it
Thank you for your suggestion and thank you for taking the time to comment. It is much appreciated.
Ray
Stellite, is Stellite, NOT HSS, NOT STEEL IN ANY WAY.
You are 100%, correct?
I was just trying to do a simple comparison on material compared to other materials
And could’ve done a better job doing so
thank you for taking the time to comment. It is much appreciated.
Ray
You weakened the tips on all the drills with the positive rake angle.
Try next time with a slightly negative angle.
Also, sharpen the end as you would a regular drill.
Air blowing on it helps keep it cool.
Thank you for commenting and thanks for taking the time to comment. It is much appreciated.
The title is missing an ED (hardened)
HARDENED not harden
Word. I was like, how the hell do you harden steel with a drill bit?
Cool video though 👍🏼
Hard-on
Ok, well I watched this expecting to be able to harden steel to be as hard as a drill.
Every where I go , I see traits of my English teacher
I think you mean, "to drill harden-ED steel", right. Otherwise, the title has two different meanings.
you are correct
i’m using a program that suggests what the title for the video should be and multiple other things sometimes it works really well sometimes it doesn’t
I don’t remember what the original title was. It was something like high hardened, steel or how to drill steel that is hard I think it had difficulty in the phrase as well, but when it came out with that, I said not a problem copy paste and went into Canva and redid all of the artwork that they suggested as well. I hope the title didn’t take away from the content, you enjoyed the video. Thank you for commenting and thank you for taking the time to comment. It is much appreciated.
hardened^
Has anyone told you that you sound like ed kemper…..
Harden is a verb, not an adjective. You want "hardened".
put some cutting oil on it
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Thank you for taking the time to comment
Ray
English…
I thought you were friction drilling in some controlled manner…
Mate is there something wrong with your keyboard? It's hardened steel.
And don't get me started on "I've sped up the video" ............
yeah, this can be a little bit difficult to understand there’s a program called tube buddy I started using it to generate better thumbnails and titles when you put your title in in the video and it generates what the video should be called and tells you what colour you should use and a few other things always trying new things
Thank you for commenting and thank you for taking the time to comment
Some of the problems with broken drills may be caused by the width of the point between the cutting edges (the web). Carbide depends on heat from cutting speed to soften the steel. The point of the drill turns too slowly to generate the needed heat. It's almost like forcing a stationary drill through the material. I'd be interested to see if thinning the point would help. Also, on the interrupted cut where you went through the center hole you would need more speed. Interrupted cuts cause thermal fracturing in carbide.
If you get brazed carbide masonry drill bits too hot, the carbide 'falls out'
It's "hardenED". And english is not even my native language.
Thank you for the spelling correction
The program tube buddy
Does the video name selection for the best algorithm
😅 at first i was thinking nit picking until i realized he was referencing the title.
Video started great, was right on point, and I was looking forward to enjoying the whole thing - but then you did what every other machinist does and assumed that we're all as smart as you are, or that we understand all the same verbiage. We aren't and we don't. Just over 2 minutes in you glossed over that little subject that obviously everyone knows about like it was nothing - angles of cutting bits/drill bits. You literally just said something like 'this one is positive and this is negative and neutral.....' and then you even rotated your wrist like that cracked the case. Huh? What part was the positive or negative part/ What angle? The side - bottom - top - like absolutely no explanation of what is meant by this. The tip of the bit? The flutes - like the inside or outside of them or both? Any explanation would be awesome because I have no idea what this means but everyone makes it sound important
You are correct they probably didn’t explain the positive negative or neutral angles, very well. If I have time this fall, I will make a video explaining angles on cutting tools
Ray
I was hoping to learn something...but I'm convinced you don't really know what you're doing. You should watch a video on drilling hardened steel before you try and give advice.
Hardened steel not harden steel.
You are correct, but the CZcams algorithm works at the other way better
Can’t fight the algorithm
@@shopandmath I hear you but perpetuating improper terminology is bad no matter what.
C'MON MAN first DRILL BIT
made in USA 👍🏻
Cobalt bit is made where ????
???????????????????????????????????????? this started WRONG