Tighten This Bolt In Any Direction You Want | Hackaday

tagsThread Rolling Machine For Nails

The metal lathe is a powerful machine tool that played an important role in the industrial revolution and is an incredible tool you can use. But that doesn’t mean they can’t be used for a little fun, just like

Just because he can.

The two videos after the break are in Russian, but the video and automatically generated subtitles are enough to illustrate the point. The bolts are M42 size, with a pitch of 40 mm, and grooves are cut in both directions to allow left-hand and right-hand nuts to be screwed into the threads. The larger pitch means that, unlike ordinary bolts, there is no continuous groove, but ten separate grooves need to be cut for each thread direction to cover the bolt surface. Since these are processed on manual lathes, a dial indicator is needed to maintain precise spacing. [Oleg] made four hard attempts to get it right, but the end result looked very good. Instead of a fixed paper cutter, he used a trimmer fixed on a custom jig.

[Oleg] also machined three different brass nuts with fixed tools to fix them on the bolts. First, make left-hand and right-hand threaded nuts, and then make two-way nuts. Due to the large pitch and careful machining, all three nuts will only rotate the bolt down under the action of gravity. Although the movement of the two-way nut is not as smooth as the other two nuts, it can randomly change the direction of rotation and translation.

Although this is a peculiar annoying toy, has any of our readers ever seen a two-way bolt or lead screw in the wild? We can imagine that the function of moving two nuts in opposite directions on a single lead screw may have some practical applications.

Incredible parts can be made on manual lathes. A kind

and a

These are just two examples of what can be done with enough skill, knowledge and patience. Sadly, it is a fading handicraft that is almost obsolete outside the hobby project of CNC machine tools.

I must applaud the work of the lathe, the excellent control ability.

Many Russians seem to have this crazy genius spirit. I remember thinking about screwing the bolt in both directions when I was a child. At that time, I had not cut off its equipment. People said it was a stupid idea. I won't repeat it.

I'm glad these days I learned to stop listening to such people. I still think this requires a full set of left-hand and right-hand bolts, but it is still an amazing job. That is a big piece of metal, especially for one, because I can project.

I still think it's useless. The thread is much weaker, requires very precise machining of smaller sizes (which means it will be expensive), and no matter how it is turned in any way, the double-threaded nut will tighten or loosen in the most undesirable direction . The only advantage is that you can only tighten those nuts with a wrench. Looking for classic solutions to problems.

As for machining-the neat and clever use of the lathe.

It is not useful at all. This is not why it should be done. Without people like that, hackaday will not be worth the electronics needed to run it.

This is an exquisite and practical artwork.


Great, you stopped listening to those people.

Everyone should be encouraged to work hard to make their ideas a reality, especially young people!

People will say it is stupid, which seems to be a sign of every good idea. Sometimes they are of course right, but more often, this does not mean that you will be said that by others.

The reality is different. People tend to say this is stupid because most ideas are stupid, so of course, when they encounter a good idea, the initial reaction will be the same.

"But the fact that certain geniuses are laughed at does not mean that all who are laughed at are geniuses. They laugh at Columbus, at Fulton, at the Wright brothers. But they also laugh at Bozo the clown."

Carl Sagan

This will make it an awesome and patentable ratchet mechanism that eliminates the annoying looseness of mechanical pawl gears... Just place the left nut and the right nut with a corrugated surface face to face on the rod, and then weld the "Y" ”-Shaped handle, you can have a one-way axe rotator with maximum torque transmission and minimum wear...

I want to know if you can somehow omit some cuts to make nuts and bolts that can be tightened in either direction, but this will "remember" the original tightening method until you loosen it completely again.

Of course, it doesn't look pretty.

Yes, such a decision can be made.

Although it requires its thread to have a pivot at the beginning, then the rest of the thread will follow.

However, how useful it actually is in practice is another matter.

It is also possible to divide the line into many smaller parts, which can be rotated. Driven by the internal cam, the internal cam is controlled by the presser foot at the beginning of the thread. The threaded head itself must be able to move in any direction, but if it encounters a thread in one direction, it will push the screwdriver and push the cam, thereby pushing the thread, ensuring that the nut can only be screwed up in that direction. The leaver in the direction of another thread is usually forgotten in the unused space of the current thread. Of course, such a nut requires spring return.

However, this kind of complex nut will make many people shudder. Maybe this is a challenge for watch manufacturers or camera lens manufacturers?

A slightly simpler device with many parts will be a gear with rotatable teeth and ball bearing surfaces. In theory, it has extremely low friction and therefore small loss, but it will be annoying in practical applications that require long-range torque. Because all the small parts make up its structure, unless one has enough space to build it.

Reminds me of the piston in the piston design of a manual coffee machine (valve and piston are a single component). When the piston is pushed, the inner piston is flush with the bottom of the outer piston and the chamber is pressurized. When the piston rises, the inner piston rises within the outer piston, allowing fluid to surround the inner piston and be drawn through the inner piston. The outer piston fills the chamber again.

Or, to put it more simply: just cut different pitches in the left and right directions

Yes, there is a simpler way to enable the nut to be tightened in two directions at the same time only in one direction at a time.

12 start patterns can be used, but only certain patterns are skipped. For an example of using the start mode: one direction is 1, 3, 5, 7, 9, 11, and the other direction is 1, 2, 5, 6, 9, 10.

They do not touch each other, and provide the same strength in both directions, and may also be interesting patterns.

Trying to wrap my head and hurt my brain XD

It is basically a lock and key system. Modes in one direction use even-numbered threads, and modes in the other direction use odd-numbered threads. Some starting points are mutual, so the same nut fits any pattern.

The final thread on the rod will not have 4th, 6th and 12th threads.

Therefore, in the end, interesting swirling patterns may be produced under the rod. It almost feels like I'm doing this kind of thread...

I work in the first store, and my boss may be dead because he is older. He told me secret clues about the first night vision goggles. He played an important role in the processing of Desert Storm.

He told me how to create a thread on a standard lathe. The thread is neither imperial nor metric, but based on sine wave equations or other methods. By adding an auxiliary input gear train between a set of gears, the output thread becomes an addition He can never be copied.

Once he explained to me how it works, but to this day I am still confused how he actually does it.

He explained to me that on important items of protected trade secrets, printed matter is often intentionally mistaken due to impossible markings, and that only the creator can quote enough details to decode the actual intent.

I think at this moment, the secret has disappeared, the shop has been bricked, and has been condemned. Maybe this printed matter was locked in a safe place or even burned down.

I have always wanted to try to recreate such a thread, which cannot be replicated. If I remember the explanation, it is derived from the mechanical mathematical function of a sine wave.

Can anyone describe how something like this will work? This is one of the oldest mysteries in my career. I believe he told me, so someone will know that something like this is possible, but he is sure that no one can copy it personally, so he told me.

It may just be that he set up a lathe to cut off the threads that were not on the table.

There are many gear combinations that can cut perfect threads that do not meet any standards.

But nowadays, with CNC lathes, you only need to type in any pitch required, and it can be achieved.

There is really nothing to do, so he might have done something more interesting than this.

All these are very interesting ideas. Now I am not so proficient in machining (although I have some instructors, I am an electrician). What should I do if a two-way nut is simply made into a lock nut? Nylon holds it in place.

Now it is clear that this is more of an exquisite work of art, and it is also a strong proof of the technical work, which is correct in itself. However, I think if this is a practical book in theory, then you want a fixed book and a two-way book, right? As far as I know, left-handed threads are usually used on rotating equipment to prevent loosening, right?

Wow! Beautiful processing! More artworks. Well, but this may cause the development of human machinery to stagnate... Left-handed? Right, numbness? ? ? righty lefty loose tights? ? ? ?

It's not exactly the same, but the "Yankee" type screwdriver has a two-way rail.

Disappointingly, two of the attached photos are retracted, so the screws are not visible.

I found this because of a bunch of things in the movie "Brothers of Bruce". Jack had a Jack in his inner pocket, and he pulled out to remove the speaker grille. One day, I will find one in a junk/pawn shop, this is mine.

Hey, are you using .io? I want to chat with you, but I have never been able to contact you.

The first thing also reminded me. I had a conversation with myself to discuss where I put the mine (2?) and why I didn't use it. My conclusion is that this is because the drill bit has been chewed a bit, it has been concealed by more cabinet-style woodworking tools that don’t see much light, and 15 years ago, I never realized the 1/4-inch hex wrench Just stay here, it's not just the latest fashion, so that's why I didn't make an adapter.

I think I have 2 of them, a Stanley similar to a Wiki photo, and a larger round roller ending in Sears. Maybe another third is still with me. It’s the bottom of a neglected box. It’s a cheap Chinese clone that I bought when I was about 15 years old (actually done well), but in the end One was discovered twice as long as the others.

"Although this is a peculiar irritable toy, has anyone among our readers ever seen a two-way bolt or lead screw in the wild?"

Yes, although the pitch makes the pitch more a helix or helix, rather than a "thread", the driven shaft is connected to a shaft with a two-way helix, which is the basis of the mechanism responsible for ensuring the lowering of the fishing line (in my Fishing reel) in a uniform layer.

3D print your own:

Fill it with reverse thread:

Commutation thread

Can't they just look in the mirror when cutting the thread?

Time to add another entry

I guess….

If a hole is to be drilled, each hole intersects with a thread (clockwise or counterclockwise), and a pair of pins (the tips of which match the thread) can be used to selectively block one or the other thread. Ability to choose directionality

You mean...bolts with railroad switches? : D

Or clockwise and counterclockwise threads have different pitches.

They use these cables in industrial winches to lay the cables

They are called "diamond screws" and will automatically change direction when they reach the end of the journey.

Self-leveling fishing reels for the past 100 years. Except for the thread, there is a wire or rod, not a nut. The nuts here are impressive.

Just like the horizontal wind device on the open fishing reel.

You can find the same axis in old dot matrix printers (IBM cash registers) or even older Selectric spherical printers (NCR 270 bank terminal). The motor only needs to rotate the shaft in one direction, and the sleeve under the print carriage will automatically reverse at the end of the shaft. travel.

Metric? !

Lol, I do the same with Imperial:) In New Zealand where we usually use the metric system, finding a metric gas connector is like sitting on a hen’s teeth. And because Metric is the tool we use to buy imperial tapping and molds, sometimes you have to spend more than twice the cost of Metric.

That's because there is no metric gas connector. [1]

There is US NTP:

And the British BSP:

This is the ISO-7 standard, defined in millimeters, but in inches.

[1] This is not entirely true. Micro pneumatics often use M5 and M3 threads, because ISO-7 threads only drop to G1/16.

About the unit dispute? Bleh ..

For projects like this, the choice of units is just a calibrated way of saying "some". The choice will only gain value when you need parts to fit parts made by others in other stores.

When you have to convert one physical property to another, SI units have obvious advantages, which is why they are almost universal in fields where these conversions must be made. For simple quantification, there is no meaningful advantage in one way or the other.

40mm pitch! Wow! That alone makes a nut that looks weird!

It sounds like a "Tute screw". Either way, it can only enter.

Very suitable for prank car shop. Cut the two bolts on the rotor and the tire nut in both directions. In this way, when someone uses an impact tool to loosen it, it will suddenly tighten instead of falling off.

I think it peels it off like a cartoon character eating corn on the cob.

Superb skills. It's really impressive. honor

One way he can improve is: clockwise and counterclockwise threads have different spacing. For example, suppose the pitch of the right groove on the screw is 40mm, and the pitch of the left groove on the same screw is 55mm. In this way, bolts tightened clockwise can only be loosened counterclockwise, and vice versa.

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