A little gizmo for measuring the flat on the end of a single point threading tool.
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- Опубліковано 7 жов 2024
- This is especially for Mr Joe Pie, the machinists machinist, who was recently talking about threading tools and the flat on their end. I made this a good many years ago on a whim. Seemed a good idea at the time but once you have found an easy way to measure PD it became a bit of a novelty, but still valid.
Nice well thought out tool Chris. A good use for the old dog of a micrometer everyone has in their box that they never use. Well done. Jon
Thank you kind sir, we try.
Nice tool Chris. Another for the list of projects.
Thank you kind Sir, unless you have a QC called "inspector meticulous" don't bother. Wait till I video my novel design 3 wire system, much better way to get "perfect" threads. I also must video my threading tool grinding jig, again a novel (perhaps crackpot is more accurate) design.
ATB
c
@@chrisstephens6673 -Feel no pressure - but I for one are keen on learning how you've tackled these two self-assigned commitments. :) Keep up the good work! DIYSwede
@@johanandersson9287 Watch this space, if you have more than a modicum of patience, that is. 🤣
I like that tool Chris - nice :)
ChrisB257 good to hear from you . I come up with loads of useless items that seem to be quite clever at the time only to find a better way of achieving the same end later. I only showed this because Joe Pie mentioned the flat in a recent video. I don't know if he will see this but I can wait for a comment., not going anywhere soon,hopefully.😉
“Not going anywhere soon” is what I hope everyday as well
Peter James welcome to the NGAS,H society , but be warned you can only resign your membership at the Crematorium 😉
Great gizmo there Chris! Thanks for sharing my friend! 👍
Thank you kind Sir, see above.
If you were first in the list the comment would have been for you.😉
Brilliant !
Joe Drouin Thanks for the comment. but I must say flatery will get you nowhere, I'm used to it. 😉😉😉
Actually a very useful tool if you want to make threads that are actually in spec. Your device gives me new ideas.
A proper thread has specific sized flats that must be adhered to in order to meet the standard spec.
For 20TPI threads the width of the flat at the root of the Male thread has to be between MIN.00625-->.0125MAX
The width of the flat at the root of the Female thread has to be between MIN.003125-->.00625MAX
The toolbit must be ground to cut those sized flats and ONLY those sized flats.
Your device measures the distance from the point to the flat but a conversion gets the flat width.
Which is: (your device Measurement) /.866 = flat width.
So that tool you measured .0058 ish will cut a flat that is .0067 wide.👍=good for a male 20TPI! (but out of spec for a female)
Conversely you can multiply the spec to get the required reading on your device
For cutting a Male 20TPI thread:
required flat width.00625 X .866 = .0054 measurement
required flat width.0125 X .866 = .0108 measurement
So your device will have to measure between .0054 -->.0108 for the flats to cut a proper sized flat for a Male 20TPI thread.
For cutting a Female 20TPI thread:
.003125 X .866 = .0027 measurement
.00625 X .866 = .0054 measurement
Your outside the box thinking has given me a pile of new ideas. I think I'll make one but I will trade the micrometer for an indicator for quick checking while grinding threading toolbits. I can only say thank you for this fun!
Glad you like the idea, I recently made one for trapezoidal threads where the flat is more important. While I was making that one I had an extra thought, if you measure the length of the tool before the flat is ground you can grind and measure how much shorter it is after grinding, then you could use a standsrd micrometer to make the measurement.
@@chrisstephens6673 Yes exactly my thought for grinding 60 deg tools . But I think it's hard for an trapezoidal thread because the un flattened tip is so long, there will be a lot of extra metal to grind to get to a point then grind it back. For 60 degree tools we usually grind a 60deg point then add the flat so it's not much metal. For an acme it would mean grinding maybe twice as much metal to get a point to measure from then grind it all off to get the flat. Your tool foregoes the extra grinding and zero's in on just the flat. You just have to calibrate it with a point but after that you don't need a point to start.
@@billshiff2060 I have grinding jigs for both 60 degree and trapezoidal where the overall length could be measured while still in the jig, but that is just technique rather than concept. Feel free to take the idea and run with it any way you like.
@@chrisstephens6673 Thanks I will.
PS I didn't check your maths but I expect you are right, being old I have to work out from first principles how to do it each time I use trigonometry.
Great idea Chris I like that will have to make one.
Al.
What ho Alan, thanks for comment, I have to admit it is a little bit unnecessary, perhaps that is why you can't buy them, but certainly an Interesting project if you have more time than most to waste.
I have filmed the tool post video but it seems a bit, how shall I say it, oh yes, Crap.😏 if I can bear anyone watching it I will post overnight.
ATB
c
Can you make a video of what that is used for? For us who are just getting started?
I'll see what I can sort out but it will make more sense as you learn more about threading.
@@chrisstephens6673 ok I'm so excited to learn.
@@1ton4god Good man, if you don't already follow them have a look at the likes of Tom's techniques( no longer active but don't let that stop you ) Robin Renzetti, Joe Pieczynski, Stefan Gotteswinter, Solid Rock, That lazy machinist, etc Blondihacks is coming along welll too. But the best teacher of all is experience. And the best bit of advice is don't believe there is only one correct way to do anything.
@@chrisstephens6673 I watch Blondie hacks, and just subscribe to Solid Rock in your Channel. I just bought a Bolton lathe, and the grizzly Mill for sixteen hundred bucks for both, and a Grizzly Mill. They are used machines but they look like brand new. The guy that had them was a hobbyist and he ran the carriage of the Bolton lathe into the Chuck just a little bit I think it scared him so bad he sold everything dirt cheap. I will absolutely subscribe to every one of those other channels. I am watching videos every night my lathe and Mill or still sitting on pallets while I decide where to put them in my garage? I don't want to put them in my shop cuz it's a small shop and it's mostly welding and grinding and I hear that's bad for them. I'm also out of room in my shop.
@@chrisstephens6673 oh I didn't know I was subscribed to Rob also. Been watching his videos this morning on scraping that Big Stone he's got. And also Joe has helped me a bunch when I was picking out my lathe, I forgot about that.
Good work, subscribed. Feel free to put your video on our homemade tools forum; looks like you're one of us :)
I'm pleased you liked it and many thanks for the sub. I haven't looked at your site, yet.
I guess I could be one of you as I make quite a few of my own tools, for better or for worse. I have a bit of a reputation for such at SM-EE, I believe.
Another original will be filmed soon, watch this space, as the saying goes.
I embedded your video on our forum just now, credited to you of course. Thanks again, and I'll be watching for more of your videos.
HomemadeTools.net Website thanks and I'll have to get busy thinking of more things to film.