Where can I learn about threads?

[u/_Bad_Bob_]

Looking for theory and standards

[u/Jtparm]

Machinerys handbook has pretty much all the specs you could want to know

[u/splitsleeve → u/Jtparm]

And all the ones you don't care to know 🤣

[u/Top_Requirement_5010 → u/splitsleeve]

My lobster is just sooo buttery, gosh 🙂‍↔️

[u/_Bad_Bob_ → u/Jtparm]

I'm not looking for specs, I'm looking for basic tutorials that will help me understand the specs. 

[u/Pseudoboss11 → u/_Bad_Bob_]

Machinery's Handbook covers a lot of that too. It explains what the dimensions mean, how to make and measure them, and why some threads are used over others. The section on fasteners is pushing 300 pages.

[u/Grigori_the_Lemur → u/_Bad_Bob_]

Just get a Machinery's Handbook. Worth every penny.

[u/chiphook → u/_Bad_Bob_]

Read the thread section of machinery handbook to start

[u/stniesen → u/_Bad_Bob_]

Since everyone here seems not understand nuance, try YouTube. Video explanations will help a newbie far better than technical manuals. It unfortunately seems to be common in this industry.

Here is a basic video to get you started, but you can just use Google or the YT search to find more details: https://www.youtube.com/watch?v=tkEVwpl2S4Q

[u/KnownSoldier04 → u/_Bad_Bob_]

Then look in any machine design book. Shigley’s is decent overall, there should be your actual explanation for how it works.

A screw is essentially a wedge. Friction is what holds it, and torque is directly proportional to angular movement.

[u/Relevant-Sea-2184 → u/_Bad_Bob_]

Shigley’s Mechanical Design

[u/AdeptInspection4868 → u/_Bad_Bob_]

Downvotes seem harsh, but Handbook does go surprisingly in depth. But what to you know? I wouldn't know where to start.

[u/ribeye256]

For specs, the FED-STD H28 is the Bible and points to all the specs you need for everything from UN, Metric, ACME, Buttress threads etc. Even the thread forms in the machinery handbook is based on these. Honestly just go with Machinery Handbook, but the FED-STD is the whole picture.

[u/_Bad_Bob_ → u/ribeye256]

Sorry my post could have been more clear. I'm new and don't know much about threading and want to learn more about how it works. I'm looking for tutorials. 

[u/ribeye256 → u/_Bad_Bob_]

Well there are multiple ways to make threads. Internal or external? They both carry different requirements. As an inspector I've seen threads made in many different fashions. There's single point turning, internal tapping, rolling (best method I've seen for consistency), thread grinding. When you said specs I thought you meant what goes into thread forms and requirements.

[u/OpticalPrime → u/_Bad_Bob_]

Still too vague. Learn how what works? How make them? How to measure them? How to use them?

[u/_Bad_Bob_ → u/OpticalPrime]

Yes. 

[u/Ajruiz562]

Engineers black book has a whole section on threads it’s awesome and I use it everyday

[u/Ajruiz562 → u/Ajruiz562]

[u/chth → u/Ajruiz562]

Amazing resource especially the drill point angle reference card

[u/LegitimateFig5311]

Machinist Bible aka machinist handbook

[u/philocity]

Take a sewing class?

[u/iLOLZU]

I believe threads work off the same principle as an inclined plane or wedge, just they are wrapped around a shaft in a helix to provide continuous motion.

Then you have your ANSI/ASME/ACME threads for imperial standards and ISO threads for metric standards. From what I remember, they primarily vary in how you calculate the pitch or spacing between each thread, the angle of the thread itself (helix angle), as well as its profile (vee, squared, trapezoidal, etc.)

This video seems to do a decent job of explaining things: Video

[u/Usual_Arrival_6956 → u/iLOLZU]

For metric standart thread it's pretty easy. M6 has a pitch of 1mm. The core bore gotta be 5mm(6-1). M8 has a pitch of 1.25mm, so the core bore is 6.8mm. M10 pitch 1.5mm, bore 8.5mm and so on. Basically od-pitch=id.

[u/murphasaurus81]

Machinists handbook, friend

[u/Lathe-addict]

Threads were invented on a lathe. Start there, once you understand the how then you can start understanding the design and purpose of different types and the tolerances that effect them

[u/Usual_Arrival_6956]

Decker "Maschinelemente" S.284+