Where can I find a wind up mechanism?

I need a winding mechanism for a project. This would be small toy sized. It would be optimal if it were multidirectional winding. Either way winds like a watch. Not a lot of torque so that small hands can wind it, but not as small as a watch winding mechanism or as complex. I would like to add gears to change the speed of the output or torque as needed. Or if anyone knows where a sawing type input such as a worm gear winding. Both of these would be super helpful. I can tear apart winding toys of course. In an information gathering stage right now. 

Asked by caltman2 4 years ago


realistic firing mechanisms.

Has anyone developed a detachable magazine with internal follower mated to a weapon which isolates the cocking and chambering of a round? i.e. the weapon is automatically chambered when the ram rod is cocked.

Posted by the rail man 5 years ago


How to tighten a nut on a threaded rod from the side, through a hole in a hollow tube?

Picture a threaded rod, with a hex nut on it. The rod is inside a hollow tube. You move the nut down the rod by inserting an outside hex wrench into the hollow tube from the top. But what if you only have access to the rod from the side, through a hole in the tube (which is fixed and can't rotate around the rod)? Is there a way to tighten a nut down a threaded rod from the side through a hole in a tube? Context: the application would be a grip for a fencing weapon. The base of the blade of a fencing weapon turns into a threaded rod (the tang). The bell guard (metal disc to protect your hand) has a hole in the middle, and is inserted onto the tang. The standard grip is a straight tube-ish thing (usually solid except for a hole the diameter of the tang). You stick the tang through the central hole in the grip. Then you stick a nut on the end of the tang (which just extends beyond the end of the grip) and tighten the whole assembly down. Some special grips are curved, which means that you have to bend the tang in a curve to match the grip first in order to fit it onto the tang. Another kind of grip is straight and hollow, with a plate with a central hole over the end butting against the bell guard, to give the nut a surface to press against, and the tang is cut much shorter than the grip, and you tighten the grip with an outside hex wrench from the back end of it, as I described initially. The advantage is that a shorter tang weighs a lot less, and the weight savings can be really good in fencing. I want to combine the advantages of these two types of grips- a curved grip, which is hollow and lightweight, with a tang that is shorter than the grip itself. Obviously, it would be impossible to tighten the hex nut through a curved grip, hence my question. 

Asked by KattB5 6 months ago


I Have My K'nex Back!

Well, I've got some explaining to do.  It turns out my K'nex was never actually sold.  My parents hid my K'nex from me, telling me they sold it, only to give it back to me extremely recently under one stipulation: I can't build guns anymore, unfortunately.  Trust me, I'm not complaining; I'm just ecstatic that I can build with them again.  I'm sorry for the huge lack of activity lately, but I haven't had that many ideas before I got my K'nex back.  My first K'nex creation in a while is this really cool compact lock.  Being K'nex, of course, I wouldn't advise that you lock anything with it, but it is nigh on impossible to open with force unless the button is pushed, or you deconstruct the lock itself.  It is powered completely by tension, and doesn't need any rubber bands or power source other than the K'nex from which it is made.  It is also extremely fun to mess around with, and I could spend about an hour just fiddling with the mechanism; such is my attention span.  I'm thinking about working on instructions, but I wanted to see what you guys thought of it first. The second thing I'd like to share with you all is this 3D Owl I printed over at Fab Lab in Chicago at the Museum of Science and Industry.  I would like to sincerely thank Matt Chalker, the head executive of the Museum of Science and Industry's Fab Lab, the museum itself, and all that make Fab Labs possible for such a wonderful experience.  Along with this owl, we made many things out of wood via the wood laser engraver, and finger puppets for each member of my family, depicting our faces, of course. (I have more pictures of both the owl and the lock.  If anyone is interested, I could post them in the comments.  They're pretty much the items on different backgrounds, though.) Enjoy! -DarkOwl

Posted by DarkOwlProductions 4 years ago


Mechanical timers - wind up mechanism

Can anyone advise what is the maximum length of time the mechanism on a mechanical hand-wind timer can last for (approx range will do) i.e between 60/70 minutes, 3/4 hours.

Asked by MMAM 7 years ago



Information on mechanical switches for electronic circuits?

Text and photos on mechanical switches for electronic circuits

Asked by 9 years ago


Mechanical wall sculptures

These mechanical sculptures by Brett Dickins are awesome. I'd really love to see his workshop with a bunch of these moving at once. via BoingBoing

Posted by fungus amungus 7 years ago



What Single shot mechanism is the most sturdy and is the easiest to load? Answered

Same as the title, which single shot mechanism is the most sturdy and his th easiest to load? EDIT:This was posted in the knex section for a reason ><

Asked by Soopah Steve 8 years ago


Does A Mechanical Iris's Cam Wheel Size Matter? Answered

I would like to know if a Mechanical Iris's Cam Wheel Size dictates how much the shutters close.  Please and thanks.

Asked by cod289722 6 years ago


Artificial Intelligence VS Mechanical Engineering

This year I'll choose a study, and I'm still hesitating between Artificial Intelligence and Mechanical Engineering. Which one do you think is the best choice, and why?

Posted by merijnvw 8 years ago


Mechanism for mechanical timer

Hello everyone, My wife and I both feed the dog, but we're never sure whether the other's already done it or not.  (the food disappears pretty quickly)  I'd like to build a track with a slider that takes about 10 hours to slide from 'fed' at the top to 'not fed', and make it so that the slider is easy to slide back to the top. What immediately comes to mind is a counter weight escapement mechanism, but I though I'd hit up the brain trust to make sure there wasn't a simpler way to pull this off.  (I could also envision a timer chip hooked to a mechanical release, but I'd prefer to stay wholly mechanical for this one.) Many thanks!

Posted by oldmicah 6 years ago


How to construct a film projector using a geneva mechanism? Answered

I am doing a project of making a geneva mechanism and then employing this mechanism i have to constructing a working model of film projector. First part regarding the making of geneva mechanism is complete but i can not find anything regarding the design and construction of such a projector that uses this mechanism.

Asked by usama164 6 years ago


Mechanical pencil basics

If you want  to enjoy life, you should make mechanical pencil guns and launchers. All you need to do is take the mechanical pencil out and add springs however you like and you can make a gun thing.

Posted by XxAwesomexX 8 years ago


How do I build a mechanical calculator? Answered

I'm planning to build a mechanical calculator which can add, subtract and multiply.. I cant find any help. Can anybody give me some links where i can be guided better?

Asked by Yashknowsbetter 8 years ago


Traditional pump car lever mechanism

Does anyone know how the lever mechanism of a traditional pump car work? I'm thinking of building a miniature model but I can't find any design schematics for it. Thank you.

Posted by pinoymale 10 years ago


what is a simple way to make an cooling mechanism?

I want to make a simple cooling mechanism(not talking about a fan here) which is simple to build, as little mechanical(moving) parts as possible, i don't have a huge budget...

Asked by lieuwe 9 years ago


alternator control mechanism

Im planning for a project on alternator control mechanisms. can anyone provide me relevant ideas about the topic?

Asked by Puranjay Menon 4 years ago



Strong Egg Timer mechanism?

I want to a mechanism that turns a drum very slowly for a few hours.  It should work just like an egg timer: You wind it up and then it turns slowly. Is there mechanism available that works like this or do I have to built it from scratch?

Asked by uwe999 5 years ago


Does anybody do anything in the Popular Mechanics Group?

Does anybody do anything in this group? 

Posted by gearup500 2 years ago


Mechanical Engineering Assistance

I am a mechanical engineer and solidworks expert with over 10 years experience in new product design and development. I offer services for hire and free advice when I'm available. Feel free to contact me for advice or assistance.

Posted by lymanjbishop 5 years ago


Alternative Clock-Mechanical

I need to build a device for a competition that can measure time acurate to the tenth of a second, but from its starting position it must be no more than 30cm in dimension, but can exceed that once it begins.  Even if you know of something that can do seconds that would be fantastic.  If you have any ideas or places to find plans please do tell.  IT CANNOT USE ELECTRICITY

Posted by danielsb7676 8 years ago


Ibles Robot In Popular Mechanics

Well I was flipping through my August 2008 issue of Popular mechanics, and what do I spy on page 16? The Ibles Robot! In his green sci fair outfit! No idea what he's doing there, and I intend to email PM about it.

Posted by KentsOkay 9 years ago


Does anyone have instructions for making a zooetrope? Answered

Looking for ideas to make the mechanics of a zooetrope or other mechanical devices that could be used to play with sequence. Thanks for any suggestions.

Asked by 8 years ago



what's wrong with block triggers?

What is wrong with the block trigger mechanism because I have yet to see a powerful gun without the mechanism. and the sear system has it's flaws. So what I think you hate is the mechanism and what do you think about the mechanism with the true trigger attached?

Posted by smidge147 10 years ago


How to make an old fashion music box mechanism

I am wanting to make an old fasion music box and actually make the music mechanism. I'm not finding anything on line to tell me how to do this and wondered if any of you kind people could help me out.

Posted by Danalou0 9 years ago


New Pull-back Mechanism

I invented this new pull-back mechanism a few days ago. It uses a sort of lever to pull the ram rod back. You pull the lever, and the ram rod goes back. It gives you a great mechanical advantage when pulling back. Any thoughts, questions, comments or haikus?

Posted by DRADIS 9 years ago


Bike mechanic will fulfill bike related i'ble requests

I'm a gainfully employed bicycle mechanic. Anyone have a request for a bicycle related instructable that's been done poorly or doesn't exist? Hit me up and I'll see what I can do!

Posted by goodgnus 5 years ago




Mechanisms I've Made

Alright, I'll keep it short and sweet: Catch-up time. Mechanisms from '08-'10, all different versions. Why not a slideshow? 'Cause I hate them. More stuff coming up. Also, these are only a few pictures of each thing, there are many more of each of them (except the mechanical hand, unfortunately).

Posted by DB2016 6 years ago


4-Leg Walking Robot Developement

   The video basically describes my project, I want to make a rideable mechanical horse and a full size mechanical mountain lion. Right now it is in the early stages. I am just designing, building, and testing parts for a small scale prototype.

Posted by Jaycub 4 years ago


Mechanical iris

I have been looking for a way to create a similar mechanical iris like this one. I tried some things but I'm just completely lost on this one. You guys any ideas?

Posted by Leooow 6 years ago



Awesome mechanical spider for one person.

I'd love to try this one out.

Posted by fungus amungus 10 years ago




10 DIY Holiday Gifts from Popular Mechanics

10 DIY Gifts for Friends and Family. A roundup of instructables projects from Eric Wilhelm: http://www.popularmechanics.com/home_journal/workshop/4295927.html

Posted by Popular Mechanics 9 years ago


What mechanism should i use for automatic window swing shutter for a model house ?

What mechanism should i use for automatic window swing shutter for a model house ? Look at picture

Asked by nathanpulkis2017 8 months ago


Assasins creed hidden blade mechanism?

I want to make a assasins creed hidden blade but i need to know if my mechanism would work. I drew it in paint . red means when the ring is pulled

Posted by OrIsIt 6 years ago


Who thinks "Mechanical" is a good or bad band name.? Answered

My frined wants our band name to be mechanical but i think its a stupid name. p.s. he  and my other two friends don't want to change it.

Asked by mberg 7 years ago


Mechanical vs Electrical Engineering? Answered

What are the primary differences between the two? Which is a more rewarding career path? Which major is better for someone who wants to get a broad understanding of engineering? Is it feasible to get a double major?

Asked by Chikpeas Brother 4 years ago


Handlebar Lawnmower Mechanism

Hello Community, I would like to know if someone has any idea about how to design a mechanism that works like this one:By pressing a button, I should enable the rotation. Whitout pressing, it should be locked.Thank you!!

Asked by FedeR3 4 months ago


can anyone tell me a simple mechanism for holding an inch rod?

It should be replaced in a bot.

Asked by 8 years ago


How Would I Make a Firing Mechanism for a Catapult? Answered

So I am trying to do this instructable here >>https://www.instructables.com/id/How-To-Build-A-Catapult/ and the author doesn't seem to be answering questions anymore. I am wondering if  anyone else knows what to do with the firing mechanism if using fibreglass pipe. Because if a hook is screwed in it, it seems like it would probably break out of it under the strain. Anyone have any ideas what i could do for the firing mechanism? Thanks!

Asked by Tin.Man 6 years ago


looking for help fabricating a mechanical arm for use in the construction industry?

I am looking for person or persons that posses the ability to help me build a mechanical arm. I need help with the computer hardware/ software end.  The arm will be used to hold a power washer hose.  Many applications I want to use it for. Endless possibilities.   Are you up for a challenge?  I live in NY but will travel. Dave S.

Asked by davesender 3 years ago


electronics and mechanics of a cnc machinecan?

So can someone give me a basic rundown of how a cnc machines electronic and mechanical aspects works im just a bit confused and cant seem to find a source to give me information on the subject everyone seems to gloss over it, but if you have a website or pdf or anything that would help thatd be great too thanks in advance!

Asked by zaronas 6 years ago