Hand Grinding Acme Thread Tool Bit
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- In this video I show how I grind a high speed steel tool bit to machine an internal acme 5 thread. We use a Starrett acme pitch gage, Starrett machinist square, and protractor. Hand ground on the 12' pedestal grinder.
Look for a follow up video on the thread cutting.
Looking forward seeing you actually making that nut and doing the threading with the tool you just ground. Even though I'm not a machinist and know hardly anything about it, I find myself being glued to the video from beginning to end!
Smoky Ribs BBQ & Southern Cuisine Hi there! whats on grill tonight? Anybody reading, check out Smokey Ribs vids here on youtube! Some of the very best grilling and smoking you will ever see.
Nothing tonight, but doing a big crawfish boil with friends tomorrow. It's that time of year again. Thanks for the comment, I really appreciate that!
Thanks Russ. That’s cool your still into the machine work. I enjoy watching your pro cooking skills! 👍🏻
Hey Adam, i like this Bid to make a tool for the Acme thread. I learn english with your vids. I teach young people to work with this machines and i see your channel for 2 years. Thanks to make this channel and give me the chance to learn the language. Nice greetings from Duisburg in Germany
That is great! I never thought I’d be helping people to learn English language!
Just remember that Adam speaks Southern Boy English. Not that it's a bad thing. In fact I'd love to hear some of Adams words spoken with a German accent.
Great video as always! Any chance you could share a bit more about that aluminum Machinery's Handbook cover? It's not clear to me how one might go about making something like that. Very cool- and great sentimental value for you!
I too hand grind a lot of tools, but I have a little Rockwell knee mill, about a 1/2 size bridgeport. In the highest belt setting it will turn 6200 rpm! With hardware store grinding rocks and a dual tilting vise I turn it into an impromptu tool and cutter grinder! It's small table size allows me to rapidly run across the tool taking about a thou at a time. Tools are carefully put into the vise correctly set for the proper angles to allow for reliefs.
Thanks for the videos.
Ohh friday video too....he's spoiling us this week :)
Adam those equipment from your granddad is of great value, man i love the way you are doing this all, keep up this way of working, you are of great value for youngsters.
You know Wile e coyote traps used Acme thread lol good job buddy
Such informational content. Always a pleasure to learn from a true craftsman. 👍
Keep up the great work.
As soon as you pulled out your grandfather's handbook, I pulled out the one I have from my father-in-law...
He worked at Warner and Swasey, in Cleveland, before he served in the war, but, apparently he wasn't the original owner.
Machinery's Handbook 11th Edition, 1941
Arlington R. Adams
N.A.C.A.
Aircraft Engine Research Lab
A little piece of history.
I have the exact same face shield. Find a box, or bag to keep it in- I had mine hanging up where I can just grab it and it is a magnet for dust. I wiped it out a few times and it scratches a bit easy; blow it out or wash it off- I haven't figured out what is best for it yet.
I keep windex at both shops and only use it to wash my safety glasses and face shields.
Damn, I just love watching this stuff.
Thanks for grinding the tool bit even tho you didn't have to. I hate looking things up only to find that everyone skips the one step I'm looking for more in-depth info on.
Love these long-form videos that go through every step; You, This Old Tony, Mr Pete, Joe Pie, and others who show us the entire process are making youtube an excellent place to learn.
Adam, I can REALLY see a difference in your journey to get back in shape, It is paying off, you might not see it, but I surely can. Well done !!!!!!!!!!!!!! Maybe give us a update on your progress.
When i was in trade school, they made us all grind by hand 5 different hss tools. A general purpose, round nose, threading, facing and part off. This video brought back many frustrating memories of making those all perfect haha
Homeboy's lost some weight!
Go Adam!!
Does it look it?
It shows Adam, keep up the good work
Keep it up man.
Yep! Encourages me to get on the ball!
Imagine, If your father and grandfather could comment. I'm sure they'd be so proud of you spreading a message I have no background in engineering but having watched your channel I understand a bit more. I hope there are lots of young people watching and learning that engineering is a noble profession. PS love your cooking adventures. Keep up the good work you're valued.
How Much Fun Is This ??? I Cant Get Enough !!! Big Thumbs Up...
To show the fit have you looked at a USB Microscope / Digital Endoscope, I just ordered one and it’s great for zooming in, to check my grinds, it was only £30 (Shekar Android digital endoscope). You can use your phone or PC and record video, I can see it will have got loads of uses in the shop, Rob (xynudu) gave me the idea when he used it for gear cutting with a printed template.
Adam - The shaper is a great tool for the shop. It has provided you with so much content for videos. Keep making more!
Sure appreciate all the time and effort you are putting into these videos. Seems like every time I get on the computer you have a new video. Thanks for the effort.
What I don't understand is when it is appropriate to make a nut out of ductile iron when you know it will be rubbing up against steel. My dim understanding has been that you never want iron rubbing up against steel. My novice expectation was that the nut should have been made of bronze or maybe brass.
Then I don't understand what the difference is between black iron, gray iron, ductile iron and Meehanite. I wonder what book I should be reading to find out these differences.
6NBERLS steel vs cast iron is a common bearing combination in fact. You see it in lots of machine tools.
What Adam I can't hear you your earplugs are in! 😃🤗👍
Can't wait to see you cut the thread. Loving that little pedal steel solo on the new outtro.--tune is so relaxing.
Just a tip to all. Spend a few rainy days just setting up little Excel programe on threading. If you like the idea of having all the info that's needed for any thread readily available on screen, its worthwhile taking the time to set up for it. As Adam gave the TPI and the Major Diameter, they were the two things I entered and out came all the information needed for both the tool grinding and the actual machining. Same for any thread and where once you set it up on your computer, its all there in an instant...... Great Video Adam and I've always admired you approach to all of you work and videos.... Great help you give all of us out here.
Thanks Adam you nailed it on grinding the tool bit. This kind of content is what separates you from many other other channels. Anybody can make chips and watch an insert do its job. I love the detail on the shaper bits and also on lathe bits. This is what tool and die making is all about. With this kind of talent and experience one shop can make the male die and another shop can make the female die and when they come together they must fit. Excellent content and attention to detail always will always keep viewers like me coming back for more.Thanks again for your time and for sharing your experience with us.
Thanks Terry!
Small suggestion about your G'Dad's Machinists book. Insert into case the other way so the back of the binding faces outward. That will keep the pages cleaner. :)
Awesome video! I really like that you upgrade the parts by machining new not just adjusting away the wear! Not only can one get more of the where the machined parts went but also since it's a shop at home that you take that extra step for and to have a machine in top shape must be a great feeling and it's fun to see you having a realy nice machine!
There is nothing better than using father's or grandfather's tools in your profession...
I like that you took your time and treated the grind as it's own precision machining operation. Thanks, Adam.
Hey Adam, can't you jig that acme thread tool in the milling machine and get a MUCH more precise grind on it?
Thanks for the video, and double thanks for muting the audio during that cutoff!
Hey Adam im addicted to watching your videos. Ive been going through watching your old ones while i wait for the new ones to come out. Ive learnt so much from them. They are very well presented. Keep up the great work!
Great to hear!
thank you for showing the end of the tool holder I am no machinist and I love your channel but I could not figure out how the tool was held in place,
Can't wait to see the threaded part. Guess it is going to be an SNS vid.
Nicely done!
Sorry, but where does the Coyote and Roadrunner figure in this?
The machinery, traps, tools and stuff that Wily used were all ACME corporation brand. The idea is that anything ACME brand will fail to work in disastrous ways.
Ahh, so that's what I was supposed to learn in the '50's. lol
Excellent video. I like how you show and explain the entire tool making process step by step. Definitely looking forward to you next video (cutting the threads)!
Awesome video sir. Its great to see the time and care you put into your work. I try to do the same thing. At work we use mostly insert tooling for the acme threading. I am going to grind up some out of high speed for the less common pitches as well as some for my field box. Great explanation and video as well!!! I hope one day I can have a home shop with at least a lathe and mill. You're home shop and tool collection are amazing!! Thanks again
Great practice! Always nice to have some tools already ground up.
smart if disc breaks got head saved
Adam's a big guy, but I think even he'd have problems with a 12' grinder! Twelve foot? Dude, you could put a bevel on a battleship! Seriously, though, this was a really nice, clear description of a surprisingly subtle task. Thread fits are so much about 'feel'. Can't wait for the cutting! (Plus all of the Roadrunner/Coyote/Acme Supplies jokes in the Comments... )
Yeah, when I saw 12' in the description, my first thought was "Abom Grind!"
loved the bronze thrust washers good idea gonna be interesting to see how tight a thread fit you go for and that backlash to be gone and just wow on finding those spare parts good to see things workin out
Great detailed job Adam! Eye for detail and patience is needed for this kind of work.
That’s great that you’re showing people proper safety techniques. Totally agree with how important it is with a grinder.
Great vid, When you were relieving the backside of the cutting tool on the grinding wheel and you were taking your time to make sure you didn't hit the cutting edge, Right about there is when I would sneeze and drive the tip into the wheel ;)
Sweet video. Think you'll ever get a surface grinder? That makes mince work out of stuff like this. you could have a whole series on the move of the machine . Inspection. Cleaning and repair. The videos would pay for the tool eventually lol
Billy C: I've wondered the same thing. A 6 x 18 or larger surface grinder would be a very useful addition to Adam's well equipped shop.
If I ever get a surface grinder I want a nice size capacity like mentioned with power table feed. Would be nice one day, but for now not a priority purchase.
My old work place had a really nice chevalier one. Power table and power feed with various programs
Adam, any reason you did not make the bit match the rod threads as opposed to a thread pitch gauge? Seems to me that would have been a good approach. I am pleased you are protecting your hearing.... I am 70 now and worked in many places where it was very noisy without protection, and now I pay the price, with significant hearing loss.
Thanks Adam Another great video Pete (UK)
Holy crow. A transparent safety shield you can actually see through. Life is mighty good for you today. All the bells and whistles. I remember watching a young guy in a body shop stick welding with no eye protection at all. This was back in the mid 1980s. I am told that snow blindness actually hurts more than arc flash. Guess he got to find out about the one anyway.
By and large I have little use for the safety nazis, but there are good reasons you chose belt and suspenders for preserving your eyes. Good for you.
I think the tool you ground may drag on the leading flank (the flank first entering the cut.) You got the flank clearances ground for a 3 degree 47 min helix angle on a RH thread? If you figure 5 degrees flank clearance, the protractor reading would be 80+ on the leading edge and the trailing edge a trifle less than 90 degrees. Draw it out to make sure. I've often ground a secondary or even a circular relief on the leading edges of thread boring tools where the helix angle poses a problem. These considerations are mentioned in Machinery's Handbook but as I recall there is no supporting illustration.
If the tool stick-out + bar dia makes extracting the bar dicey between passes you could back it clear so the bar isn't quite rubbing the ID and reverse out with the extended tool following the thread space. Sometimes that's the only way you can cut deep coarse Acme threads in lead screw nuts like on an HBM. 2 1/2 - 2 LH Acme DOUBLE 8" long in bearing bronze comes to mind. I had to invent new swear words.
BTW, there's a difference between Acme and worm threads. Acme threads have the 14 1/2 degree pressure angle measured on the axial plane. Worm threads have the flank angles measured on a plane inclined to the helix angle. An Acme tool won't accurately cut the flank angles of a three start worm, for example. I found this out the hard way cutting some integral worm shafts for DeLaval turbine driven fuel oil transfer pumps. They wouldn't blue in to the mating gears. 12 pieces of shiney, very expensive junk.
Forest, I figure that out when I machine the nut. I have more videos coming on that.
Abom79 Sorry, Adam. I shoulda known you'd figure it out the first passes of the tool.
2:40 this, this mentality is why i spend my watching time with you and a few other folks.. thanks Adam
I just want to share some thoughts right here.... when you fit a nut for a worn thread, you should maybe grind the tool like a thousands smaller than the nominal size if you want to eliminate all the play in your threads. Just correct me if I am wrong.....
Oh, bummer! I'll have to wait for the next video. This one was very instructive. Can't wait to see the actual thread cutting.
Lovely to watch you do that and me not see where I cocked up when I did my first ACME last year. The tool bit gauge makes the entire job much more straight forward. I used an online Maryland metrics thread data to get the dimensions. All the best mat
Thank You Abom79, Thank You for taking the time to show all the steps, I really appreciate and enjoy your videos Sir! Thank You for being awesome! Thank you for being an Epicly Awesome Teacher! You Rock Sir! AWESOMENESS at its Finest Sir! :) :) :) Thank You!@ :)
looking good man, cant wait till we see the cutting taken place and hope you got a nice got fit, also looking better for losing weight each week keep it up adam
Good stuff! But the mention in the Description of working on a 12' pedestal grinder is pretty terrifying... 12" is wa-a-a-y safer! Just imagine getting up close to a 12' wheel!
Adam i Love these videos man i have gone back and watched every one some multiple times i wish i could come and work with you in ur shop 👍👍
That’s a lot of viewing Kevin!
Abom79 i subscribed almost 2 years ago now and i always enjoy watching in the moring with my coffee to get my day started
You’re looking great lost some more weight as a big guy that has been through the same deal make sure and take a daily vitamin
It help me to translate and understood the technical english. I belive in our times is it more important to learn it as in the past. I tould it the students often if i can how important it is. Adam explain on his vids all the basic's and many many specials. Good job Adam.
Did you run a thread gauge over the screw to see how much wear there is in them? Yeah shoulda suggested it 2 weeks ago lol.
Birmingham UK. 9 miles from me Airport 14 miles we call it Brum A brumy spanner is a hammer. One day I fix my miller cross feed nut 5 tpi Acme like your doing but left hand in bronze
At Dresser we had a large 2 wheel grinder and a diamond wheel grinder for fine tool work. Made life much easier for the manual lathe operators. Tool crib carried hundreds of pre ground tools, all listed under a TD heading. Specific operation tooling was called out on the travel packet, but most times we had to grind clearance, etc, to make the tool work. Lookin good there!
Double check that your land width on the toolbit is narrower than that on the leadscrew to ensure that the cut thread contacts on the flanks rather than the major diameter.
I would be interested in the brand of the face shield you are using? Thanks to a great guy for all the great videos!!
I like the aluminium case on the machinery's handbook, I have a 10th edition I would like to make a case like that for.
Love the slow-mo on cutoff.
Fine work Adam
Adam, Very nicely edited video! It tells the story and shows all the steps in nice detail. Something I wanted to learn and now am inspired to grind one. Thanks for sharing the safety message also!
Adam how come nobody ever talks about the relief pitch for the different pictures of thread on the lower part of the tool
Love Granddad’s steel case for the Machinery’s Handbook!
Nice touch muting during the cutoff! You are getting good at this!!
I've got a blast sheild also love it. I can fit my respiratory with it on. Great video. I've got to get some honing sticks.
A true trades person. ..uses t shirt to clean the bit.....oh the memories.
Well done!!
love this stuff. I learn something new every time i watch one of your videos. teaching an engineer machining is not an easy task ;-)
all I can say is ......Sweet.................. thank you great video.
Your hand writing is nice Adam, it is a pleasure to read.
Thanks!
I imagine it takes about 14 hours for that grinder to slow down and stop after it's turned off.
I think this is going to be beyond "machinist fit"
Great stuff. Would love to hear more stories about your dad and granddad too.
a tease video, tough i was to see the actually threading in the end of video lol
Hey you are looking really good! Keep the up with your dietary program.
Awesome video Abom :) Calgary, AB
I'm not a mathematician, but I play one on TH-cam.
thumbs up mate .
....a piece of art, as usual....congrats Adam.
Can I ask how is major 1.062” and not 1.000”
Why not make a tap, then tap the female hole you need & all the while always having a custom tap on hand for years to come....??
Tony Turner this is much less work, and can cut this pitch thread in any diameter nut.
looks like someone has some new Everlast machines. A plasma and a 200DV. I have a 200DV myself.
Yea. I hope to getting to the new welding cart soon.
Well laid out. Thanks for that.
Hey Adam, Easter wishes from Australia mate. Adam as always an exceptionally well filmed and commented video, full of content and practical information. You know I always wonder if there is any correlation between your uploads on TH-cam and sales on eBay because I know everytime I watch a video I am busy scribbling down notes and then heading to eBay to make a purchase.....it will be so much easier for the rest of the world when the USA goes metric as you are probably one of the best reasons I can think of with your following to justify metrification :-) Take care mate and can't wait to see the machining of the nut.
I don’t think it’ll be happen, not 100%
I'm just getting started as a hobbyist and I find your videos very helpful and informative. Thanks.
Do you ever grind the end of your finger?
Adam... Have you thought about adding an adjustable fence to the grinder table? Looks like it would be an easy addition. The table looks plenty stable and substantial. Looking forward to the actual use.
I’ve given it some thoughts
Wouldn't have to be anything fancy and would sure help with those angles. Might even save those fingers from being "bitten" Maybe a future project?
Here's a good tip. Just the other day I needed to grind a 55deg BSPP single point tool. I set up the Compound at 62.5deg using Trig. (Sin 62.5 x 125 = 111). This meaning I could machine a 3/4" piece of stock at 27.5 deg of chamfer. I did two pieces and drilled a small hole in one. I set one in the tailstock and the other in the chuck and brought them together. A perfect 55deg to set the tool grind. And exactly the same for any tool angle needed if you don't have the gauges.
Adam, great video as usual. Trying to find the face shield you are using, so much nicer than the one I have now. Did not see it on McMaster or Graingers. Could you fill us in on where to find one?
Zoro.com
Thanks, found it.
Thank you Adam...
Adam, when you said (close to the end) that you could feel the wear on the threads, could it be because the tool bit isn't sticking out enough?
If so, would you need a thinner boring bar?
Because the old nut has wear in the threads. I ground the tool to a near as perfect fit as I could seen
Yes, it looks very well ground. Great work! But what I mean is: When you are "checking" the wear, is the tool touching the root of the threads, or is it the boring bar which is touching the crest?
It's difficult to see from video, but perhaps the tool bit isn't sticking out enough. I just wanted to make sure before you cut that thread.
And if it is out enough, just ignore this and good luck making those chips! Greetings from Brazil.
You look like you've lost weight,what is your secret?
James Ciampi I will hazard a guess the main thing is portion control. A certain amount of scheduled exercise helps a lot. Sort of like having a high idle in a car engine. But the main thing is portion control. It took him years to gain,losing slowly is wise. Not easy,but wise. Years ago,after a very bad year of back surgery,I was some 60 plus pounds overweight. Lucked out and got a job with a property management firm. Walked off most of it in 8 months. Added portion control to that and it was painless to lose the rest. Cannot answer for Adam,but that was what worked for me. Hope it helps. Cheers.
2 questions. Why the choice of Ductile iron for the nut? I would think that Gray iron or Bronze to be the preferred material. Also have you ever tried milling your form tools? I haven't milled any acme tools but I have milled full 180° radius tools. Modern coated carbide cuts a tool bit it very well.