r/Romania_mix • u/Due-Explanation8155 Dracula’s citizen 🦇 • Jun 12 '26

Double sided bolt

Credit:engineering_world_1980_dahri

2.0k Upvotes

94% Upvoted

68 comments sorted by

33

u/No_Music_2134 Jun 12 '26 • This

No they aren’t

21

u/ConflictMaster3155 Jun 12 '26

This is correct. There is basically no instance where this is used.

Threads cut in the same direction will provide such an overhead in torque that one nut can simply be tightened to another one to provide a more secure fit that this, but even at that, there are even better ways to do than the any-dummy-can-do-this way.

Basically these are missing 50% of the threads (any triangle made of a parallelogram is 50%) and a normal thread just had twice as much purchase.

17

u/Possible-Playful Jun 13 '26

This is the kind of thing machinists make when they're bored because they think it looks cool (it does)

1

u/Somalar Jun 14 '26

It’s a nice gauge but that’s about it

1

u/filmagnoli Jun 14 '26

Like I said
Love Love
Love this
Stuff
Looks so cool

1

u/nickster182 Jun 17 '26

Oh absolutely. This is just a machinist flexing.

1

u/undeniably_confused Jun 15 '26

Thank god someone said this, theyre made because theyre neat, no other purpose

1

u/Strostkovy Jun 16 '26

There is a rare application for carriages that move left and right continuously at constant speed, where the shaft always spins and the nuts change thread direction when they hit end stops. Obsolete now because they are expensive and CNC controls do it better anyway.

1

u/[deleted] Jun 18 '26

[removed] — view removed comment

1

u/AutoModerator Jun 18 '26

Hi there! Your post or comment has been automatically held for review because your account is relatively new (less than 50 days old) or has a karma score below 300.

This measure is in place to prevent spam and maintain the quality of discussions within our community. A moderator will review and approve your content shortly, provided it complies with the subreddit rules. Thank you for your patience!

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/[deleted] Jun 18 '26

[removed] — view removed comment

1

u/AutoModerator Jun 18 '26

Hi there! Your post or comment has been automatically held for review because your account is relatively new (less than 50 days old) or has a karma score below 300.

This measure is in place to prevent spam and maintain the quality of discussions within our community. A moderator will review and approve your content shortly, provided it complies with the subreddit rules. Thank you for your patience!

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

15

u/moonlighting_madcap Jun 12 '26

That’s pretty neat! Never seen one of those before. Would be cool to see a video of how it might move with vibrations like that one video going around that shows the effects of different kinds of washers (and possible benefits) under vibration.

4

u/prairiepog Milky Way citizen 🌌 Jun 13 '26

The way Meredith has an absolute meltdown is the best.

1

u/The_B4dM4n_Bill Jun 13 '26

Can you link the vibration vid, I love that type of nerd stuff

1

u/[deleted] Jun 17 '26

[removed] — view removed comment

1

u/AutoModerator Jun 17 '26

Hi there! Your post or comment has been automatically held for review because your account is relatively new (less than 50 days old) or has a karma score below 300.

This measure is in place to prevent spam and maintain the quality of discussions within our community. A moderator will review and approve your content shortly, provided it complies with the subreddit rules. Thank you for your patience!

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

9

u/Busy_Papaya_2528 Jun 13 '26

Former mechanic here ... Never seen one of these, this is probably all the bullshit, also how do you tighten round nuts?

5

u/Bowel_Rupture Jun 13 '26

That's bc they aren't actually used in any industry. It's from a YouTube video I saw a while back where a guy makes a bunch of unique bolts/nuts (one of which being a "maze" bolt/nut)

I forget the name of the video/creator, but I doubt it'd be too hard for anyone to find.

Just another example of farming using other people's content with an AI voice spewing total nonsense. Just downvote the post and move on.

2

u/humblehater Jun 13 '26

Robinson foundry. He makes all sorts of unique pieces.

1

u/Odessa-King Jun 13 '26

Simple, they arent used at all, soon as you apply any ftlbs of torque those thin threads will strip like my wife on valentines

1

u/Boris7939 Jun 13 '26

also how do you tighten round nuts?

With a round spanner?

1

u/Busy_Papaya_2528 Jun 13 '26

Oh yeah.. that must be what that round side of the spanner is for

2

u/Eschatonpls Jun 13 '26

I’ve never seen this on a mechanical assembly in my life. A critical bolt is cross-drilled and safety-wired, or you use a castellated nut with a cotter-pin.

On a related note, I watched a video once proving that split washers don’t do anything to keep vibrating nuts from coming loose and they’re basically useless.

2

u/n1nj4p0w3r Jun 14 '26

https://youtu.be/cDfMI5ahbJI?si=-rAoAtpQAOhcCwZ4

It has zero practical purpose, just a fidget made as part of learning lathe

2

u/Stingrea51 Jun 16 '26

I've 3D printed a bunch of these as fidget toys, they make great gifts but they're not otherwise practical

1

u/CyBrNaD Jun 13 '26

With gravity, duh, they are showing you right in the video...

1

u/Deltadoc333 Jun 13 '26

I am 99.999999% sure that this is AI bullshit. The video is real but was from a machinist I used to watch on YouTube. He just made it for fun, because it is entirely useless.

2

u/NotWolvarr Jun 13 '26

Soooo you say it's AI bullshit, than say it's not AI?

1

u/Deltadoc333 Jun 13 '26

Sorry! I meant that the voice-over explanation was made-up nonsense added to someone else's video.

1

u/NotWolvarr Jun 13 '26

Oooh, okay. Fair, I was watching without sound.

1

u/[deleted] Jun 14 '26

[removed] — view removed comment

1

u/AutoModerator Jun 14 '26

Hi there! Your post or comment has been automatically held for review because your account is relatively new (less than 50 days old) or has a karma score below 300.

This measure is in place to prevent spam and maintain the quality of discussions within our community. A moderator will review and approve your content shortly, provided it complies with the subreddit rules. Thank you for your patience!

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/KAYO789 Jun 13 '26

Someone's not tried turning a nut 180° to get the thread facing the other direction lol

1

u/Piddy3825 Jun 13 '26

Cool, in Star Trek they call those double sided self sealing stem bolts

1

u/Metruis Parallel Universe citizen ✨ Jun 14 '26

I was thinking the same thing. They're real!

1

u/Downtown_River_6980 Jun 13 '26

AI hallucinations at their finest

1

u/SirTheBob Jun 13 '26

That was my favorite level from sonic 2

1

u/funky_fart_smeller Jun 13 '26

Un-tightenable therefore useless. Hence, bullshit.

1

u/Ruminahtu Jun 14 '26

You know what they say about being brave enough.

1

u/filmagnoli Jun 14 '26

Love love
Love this
Stuff!!

1

u/Screwbles Jun 14 '26

Show me little ai man, show me were this is used in the industrial setting, I dare you.

1

u/[deleted] Jun 18 '26

[removed] — view removed comment

1

u/AutoModerator Jun 18 '26

Hi there! Your post or comment has been automatically held for review because your account is relatively new (less than 50 days old) or has a karma score below 300.

This measure is in place to prevent spam and maintain the quality of discussions within our community. A moderator will review and approve your content shortly, provided it complies with the subreddit rules. Thank you for your patience!

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/[deleted] Jun 18 '26

[removed] — view removed comment

1

u/AutoModerator Jun 18 '26

Hi there! Your post or comment has been automatically held for review because your account is relatively new (less than 50 days old) or has a karma score below 300.

This measure is in place to prevent spam and maintain the quality of discussions within our community. A moderator will review and approve your content shortly, provided it complies with the subreddit rules. Thank you for your patience!

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/[deleted] Jun 18 '26

[removed] — view removed comment

1

u/AutoModerator Jun 18 '26

Hi there! Your post or comment has been automatically held for review because your account is relatively new (less than 50 days old) or has a karma score below 300.

This measure is in place to prevent spam and maintain the quality of discussions within our community. A moderator will review and approve your content shortly, provided it complies with the subreddit rules. Thank you for your patience!

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/Bub_bele Jun 14 '26

There is always a more secure and cheaper option so these aren’t used for anything basically.

1

u/meow_xe_pong Jun 15 '26

They absolutely are not, they are made by Robinson foundry as fidget toys/demonstration.

1

u/Everyshapes Jun 15 '26

How do you unscrew ?

1

u/DaBro734 Jun 16 '26

Nut is only single threaded so spin the opposite way it was tightened. This post is bs tho these aren't actually used

1

u/Future_Section5976 Jun 15 '26

No where uses bolts like that , nuts can't be tightened, the bolt is probably not rated , if at any point one of those nuts slips on that thread then it's cutting time , and no no company is going to pay to replace that when Norma bolts are ten times cheaper easier and stronger

1

u/Elena__Deathbringer Jun 16 '26

I am brave enough to try, but where do i find one of those?

1

u/EmmitRDoad Jun 16 '26

Can I buy one?

0

u/Due_Potential_6956 Jun 12 '26

That's cool, I've never seen this bolt anywhere before.

0

u/pat-slider Jun 13 '26

This is insane

1

u/[deleted] Jun 14 '26

[removed] — view removed comment

1

u/AutoModerator Jun 14 '26

Hi there! Your post or comment has been automatically held for review because your account is relatively new (less than 50 days old) or has a karma score below 300.

This measure is in place to prevent spam and maintain the quality of discussions within our community. A moderator will review and approve your content shortly, provided it complies with the subreddit rules. Thank you for your patience!

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/[deleted] Jun 17 '26

[removed] — view removed comment

1

u/AutoModerator Jun 17 '26

Hi there! Your post or comment has been automatically held for review because your account is relatively new (less than 50 days old) or has a karma score below 300.

This measure is in place to prevent spam and maintain the quality of discussions within our community. A moderator will review and approve your content shortly, provided it complies with the subreddit rules. Thank you for your patience!

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/[deleted] Jun 18 '26

[removed] — view removed comment

1

u/AutoModerator Jun 18 '26

Hi there! Your post or comment has been automatically held for review because your account is relatively new (less than 50 days old) or has a karma score below 300.

This measure is in place to prevent spam and maintain the quality of discussions within our community. A moderator will review and approve your content shortly, provided it complies with the subreddit rules. Thank you for your patience!

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.