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Dear all. I would like to make a spring 8mm diameter 100 mm long with 18 gauge galvanized wire (needless perfect) . Please could you help me to know : It's must make   heat treatment  before or after on the finished spring .Thank you so much

I have 50 trampoline springs and i want to make like a bungie jump type thing any ideas, instructables????

Has anyone ever made a spring airgun? like an airsoft gun made from home made items. because pnumatic guns are too simple (some are very good though) but it gets anoying pumping in between shots so has anyone either made a multi shot pnumatic gun (not fully auto matic) or a spring airgun that needs to be cocked ever shot

Spring is the time now!  Everyone mourn for a death... that of winter!  A new season is rising out of the ashes: Spring!  All of the beautiful flowers will be waking up after a long slumber, and poking their heads out of the earth.  Fruit trees will flower, and soon, there will be an abundance of wonderful fruits to share with one's fellows.  May everyone rejoice at the new time of peace that is arriving!

Spring Break is here! For me, that means I hole up in my house and go into town as little as possible. I live in Augusta, Georgia, the Home of the Masters Golf Tournament. Big whoop. I don't like golf, but people from across the world come to my town, just to watch the game. I'll leave on Thursday to spend 2 days in Atlanta. But what are y'all doing? Going anywhere fun? The beach? Theme park? Post where your going, and if you want, pictures when you get back! Have a fun break, Bran.

I have like over 3000 springs and get more every day. what can i do with them? they are about 1 1/2 inches long and 1/4 inch in diameter.

The springs I have are from pens.

Are there any thoughts on an easy way to hand wind a helical compression spring using simple hobby workshop equipment? Say, d = 0.25 mm, free l = 80 mm and shut force about o.5 N ( 0.1 lbf)

Im gonna build some wings... and need some tension springs to hold them up...but all the ones are either just hobby lightweight ones...or giant ones... help! thanks.

I've looked high and low, but can't find a description of the date dial mechanism.  Unlike hte hour hand or the moon dial, it doesn't move gradually - it moves a set rotation percentage,  all at once, so exactly one number is displayed at any given time, and at midnight, it switches over.  Does this make sense?  Does anyone know about this mechanism?  What are the components? I'm trying to create an analog random story generator, using the same principal as the date dial on a watch.  Instead of numbers, the discs will have pieces of a narrative written on them.  Each one will rotate at a different rate, and each disc will be divided into sections with once sentence each.   The intention is to hide all but one sentence behind a board, with a window cut out to display the one.  A drawing would make more sense. 

I need to know this because it will be cheaper than buying a bunch of demo springs.

I got a few old twin mattresses that I'm about to rip up and I hate to just pitch the steel springs when they could be used for something else.  Any ideas out there? 

WTF?! It's snowing like CRAZY right now. IN THE SPRING?! It was warm yesterday! Global warming for ya.

My friend and I are considering building a spring loaded cannon. The idea right now is to have a pvc pipe for the cannon chamber, and pvc pipes flanking it to hold springs in parallel. A cross-bar will go through all 3 pipes through slits cut long ways in the pipe. The springs will be attached to some point forward in the flanking pipes and to the cross bar, which will be used to pull the springs back and, once released, will launch the dart/ball in the center tube. My research so far - the spring rates of springs loaded in parallel are additive. With 5x 10-in*lb springs, we can produce 667 newtons of force when pulled back 3 inches (springs in question are 5.5 in long) . That will produce an acceleration of 303 m*s^2 on a 1 lb (2.2 kg) albeit for only a fraction of a second. http://www.amazon.com/Extension-Spring-5-625-Long-080-count/dp/B001292S08/ref=sr_1_1?ie=UTF8&s;=industrial&qid;=1257718057&sr;=1-1 These are the springs we're looking at. We'll need to use an even number of springs, so either 4 or 6 (or 8 or 10). So, what do you guys think? Practical? Will we be able to get any distance? Any suggestions? A ROUGH picture is shown below. === are spring tubes, | are handles, and left arrows indicate direction in which springs will be stretched, and the right arrow is a dart flying out of the center launch tube. <----| ===== XXXXXXXXX     ------> ===== <----|

Hi, I want to build a rotating mechanism powered by a spring. Once released,I need the piece to make 2 rotations in a fraction of a second. I also need it to be quite powerful since it will have to push another piece. For this application, I believe that a coil spring (such as those we can find in clocks) is the best suited, but will it be powerful enough ? An if I use a torsion bar spring, the problem is that I probably won't find one that can make 2 turns.... they are usually designed to be used on small angles only. I would be glad to have your advices ! :)

Wanted to try how far the magnetic field of my new stirrer is reaching and observes something weird...If you have a normal stirring rod in a beaker then these things do excatly what they are supposed to.Even if you try to add the rodd to an empty beaker while the stirrer is already running.The first option gives you a nice rotation, the later often just some jumping and bouncing rod.Fun fact though: Inside a stirrer rotates a magnet and the rod is just a steel bar enclosed in polyethylen or teflon.Trying to make a stirring rod roll around the center instead of rotating is next to impossible - it always tries to use the max binding force and centers itself.So I tried different things for the end goal of designing a stand up stirring twoer instead.You know, like these fancy ones found in huge water towers to agitate the water.I found a small steel ball with two magnets attached quite interesting but an accident made me wonder...For some reason I did not turn the stirrer fully off when searching my little box of goodies for new stuff to try.A small spring for some motor bushes landed on the stirrer...And although it moved dead center it did not spin at all.A slight vibration was all I could see.First weird behaviur happen when I tried to move the spring around to check why it is not spinning.Pushing it a bit lengthwise suddenly made it spin!A bit of fiddling a trying showed it works best slightly off center to the magnet with one end while sitting on the radius.The spring rotated like a horizontal drill but in no relation to the stirring speed.Second and even weirder things happened when the spring slipped through my fingers.It started to roll around the center of the plate but in the opposite direction to the magnets rotattion!An increase in speed made it roll faster until the g forces made it fly off the plate.If you have a magnetic stirrer then try it out one day.I have a few theories why the spring starts to rotate or roll but none make fully sense.Can try to take a video for those with no stirrer but for the fun of it it might be good to just mount a magnet on a motor and try LOL

If so, how did you add them? Did you add it to the stationary point? Will this addition help with the distance of the car? This is the goal: "1. your car must be powered by no more than 2 rubber bands. may be any size. 2. body of car may be made out of most common household materials. wheels may be previously manufactured, but body can not be. 3. may not launch or catapult car. must be self propelled." 

I had a broken trampoline that i couldn't afford to fix so now i have a pile of scrap metal and like 60 trampoline springs. I was wondering if anyone has any project ideas that i could use my pile of scrap for.

I need to make some springs for a recliner. They are the ones that support your back. They look like a sine wave. I have 1/8 inch piano wire, however it is really tough to get bent into the correct shape without a jig. Does anyone out there remember seeing a bending jig on Instructables that had various diameters of bends, etc? The only one I can find is associated with making a NAROD antenna. The piano wire is a lot tougher than the copper used for the antenna. Thanks for any help...

I have this awesome worn brown leather loveseat, but the springs at the bottom are warped and i wanted to know if there was a way to fix that or if there was a way to make a new spring supports for my beloved couch

I have a cot that i've used probably way too much... it's not the traditional kind of cot because it has springs, so the springs have been unwinding and consequently sagging, while the fabric is tearing in the midde.... so i'm going to need to either throw it away or find some way to reuse it. Any ideas? The aluminum is hollow, but sturdy...

http://youtu.be/zqG-TL0WnjE How does this device work? Has it ever been on instructables or anything like it? How would I go about mounting the magnets on the rotor? What sort of spring would I need for the magnet mounted to the vertical shaft that slides up and down? In short I want to know every little detail about building it before I begin so I don't go buying a lot of unecessary stuff and waste money.

I have been reading on this site about the problems associated with building and using a vehicle for road use that runs on a clock-work basis. The square cube law problem re the spring and also the problems created by the gyro forces of the flywheel. What I want to ask is: Would it be possible to have a spring or series of springs big enough that could drive a generator to charge a bank of batteries that would then power a narrowboat on the inland waterways and potentially rivers of the UK. There is a company that supplies engines and batteries and their paraphernalia suggests it is possible to get 2 hours of battery propulsion from one hour of diesel use - http://www.betamarine.co.uk/inland/Beta_Hybrid/inland_hybrid.html. So, if the engine was removed could it be possible to use some kind of clockwork spring-thing instead of the engine big enough to charge batteries that would then power the boat. I am thinking that winding the spring would be done but either a very geared down bicycle or some kind of geared down lever crank with ratchet or even a transportable friendly donkey...I appreciate that fitness and maintaining it would be important to wind up the spring by pedalling the bike, cranking the lever or chatting to the donkey to keep it friendly. How big would the spring need to be and how long would it take to wind it up by bicycle, crank or donkey. Keen to know what the real problems would/could be...am thinking it might be possible to use a series of springs so they do not have to be so very big and therefore could overcome the square cube law problem and how many would be needed to charge the bank of batteries to then turn the prop.

Just out of idle curiosity... when does your school go on spring break?

 I have always tried to make a spring action knex gun, but no one ever posted one. Is it possible? Does it need an industrial-grade spring? Please post an answer!

For my Nerf Gun Mod I need a 14kg load spring. After a VERY long time of looking I've come up empty handed. Where on earth am I going to get a spring for my longshot?

Spring sports are starting, I'm doing track, anyone else doing any spring sports?

Anyone know how to make the snakes in the classic mixed peanut spring snake prank? I want to make a large set of snakes & put them in a motorized single barrel shot gun which spits them out fast one at a time. 

I am going to build an arm to hold a tv that will hang from the ceiling. It will be approximately 52" for pivot to CG. As I am a teacher it will be an old fashion heavy CRT (prolly around a 25" tv)rather than cool wazoo light weight flat screen. I am looking for an appropriate torsion spring to take it from hanging to pinned up against the ceiling. I know about garage door springs but can't figure a way to retemper the spring after I cut off a few coils and bend an end so I can use it. Any ideas you may have to come up with a spring (canabalized is fine) or a retempering process would be appreciated! Thanks! Mikey

I'm working on a Halloween prop (though, with what little time I already have, it looks as if I will have to use it next year), a part of which is supposed to be a metal torsion spring. I am at a loss for ideas that would look real. I suppose whatever it is, I could paint it silver. Any help would be appreciated!

98 toyota camry. lotsa tools in trunk. sometimes a trailer, or bike rack. back end tends to bottom out. just replaced struts. improvement. but still bottoms out some. suggestions?

So of you may know that i have been building a coil gun so for the next step i need a ammo clip. I am trying to make a ammo clip that holds 3-5 "bullets" so that when i fire 1"bullet" the 2nd one in line will spring up in place. i tried google, scribd, ehow, and even search here but couldnt find any thing help full.

Hello everyone, I'm currently in need of a 5 gallon water jug but have not come across anything that will fit exactly where i need to put it. I was wondering if anyone knew of a decent way to go about re-shaping an old 5 gallon Poland Spring water jusg I happen to have kickin' around. Thanks.

I want to build a large spring airsoft rifle that looks as realistic as possible. I will be using a large very strong spring from ace hardware. I want it to be as efficient as possible but i want it to also be very cheap. Any ideas? I would prefer a metal body, but wood or plastic would be ok. I was also wondering if somebody had a drawing of the trigger mech and magazine assembly. i was thinking a brass inner barrel with a larger metal or pvc outer barrel. i want the gun to look like the one in the picture. i think it's a mauser

I'm building a folding ramp to replace my tailgate on my truck. It's going to be used to load/unload a ztr lawn mower. (It's been built primarily from discarded bed frames, with the addition of some expanded steel grating.) Because these mowers are back heavy, and low to the ground, a longer ramp is needed than you need to load a conventional mower. My solution is a spring loaded 8' ramp that is comprised of two 4' sections that fold down and out. It functions, it fits, the mower goes up and down it ok. The problem is that it is so heavy, that after it comes down about 2/3 of the travel, it is very difficult to control. When it comes down hard, it puts tremendous stress on the center - where the two sections of ramp meet. It can be hard enough to break it. I know my welding isn't the best, but that's really not the issue here. This is a design problem. I'm going to post a few pictures, to better illustrate my situation, and to show some of the things I've tried to soften the blow. The picture of the partially folded ramp was taken at the point where it begins to get difficult to lower without losing control. So, to clarify, I need a way to lower and raise the ramp with more control, and or soften the blow towards the middle.  The springs I'm using are 140lb garage door extension springs, the largest springs available at any big box home center. I need to get this finished yesterday, so I'm going to try some things while I'm waiting for a response, like move the springs back further in the bed to put more tension on the whole thing. I'll also post this to the welding web forum, but I started here because I've got a lot of faith in the ingenuity of the instructables community. If we get the bugs out of this thing and anyone wants it in instructable form, I'll do my best. Thanks for reading the War and Peace of ramp questions. -Amir

OK, I think after posting in some of the other forums that maybe this is the best place. I have asked for some help in the Tech, Science, and Burning Questions Forum (Not sure if I should have started a new thread in each one for this project so if I should delete the other's please let me know). I am new to the forums and just signed up for a 2 year pro membership to help contribute as I have been viewing on and off here and there for the past few years. If anyone can help me make this, it would be much appreciated! I came across the object shown in the link below and shown in the attached pictures. It is the  "Toy Car" by the designer "Wouter Scheublin". It is a spring powered toy car made in the limited edition of 20. It does not look very complex, but does look elegant. It can be purchased for close to $3,500.00 US on the justification that it is art, but that is not something I will ever be able to afford for this type of object. I am not insinuating that it is not worth it (last year I actually contacted the designer as well as the people selling it for him to see if I could pick one up for substantially less).  In any case, please check out the link below for pictures and let me know where a good place to start making the components might be or just where to start in the design and build process period would be. I guess I would need to know the actual parts needed before I could start to assemble even something remotely similar and I figured the geniuses that use the forums here could help me (being that its December and in the spirit of giving and sharing and all) or maybe someone here might even be interested in possible making with me. Thanks in advance for your consideration and reply. See Link Below.  http://www.wouterscheublin.com/projects/toy-car/ On another note, I really really love this kind of gadget. Metal (or wood), Mechanical, Simple, Elegant. I have searched everywhere and have trouble finding a site specific to these types of objects. small precision desktop machines like a well machined Stirling engine or the like. (no need to be powered. Can anyone point me to a place that has such things. Another example of something I like (and did purchase) is the super precision gyroscope from gyroscope.com. http://gyroscope.com/d.asp?product=SUPER2 Another example of a mechanical gadget I would love to have or like to read about is. http://www.ohgizmo.com/2011/11/28/hypnotizing-video-of-the-worlds-smallest-v-12-engine-being-assembled/

They are legal in canada

 I need to make a metronome out of a spring and mass system, one that has a mass on a vertical spring that goes up and down. Here's the catch: it needs to be accurate for more then 2 minutes, so I want to find a way to maybe hit the spring just a bit so that it will keep going. But, I don't have any access to a motor, or electrical source. Does anyone know how to do this? Like mechanically? I was thinking like how a clock conserves energy, but mine moves vertical.

Hello, I just build a new desktop PC and would love to have a spring-loaded door, with an eject button, to cover my CD/DVD drive, like the ones on HP or Acer computers I can't seem to find any sold commercially. Does anybody know how to build one?

I have a scheme that requires a flat, non-conducting spring. Acrylic it too brittle for my needs, but I know that some plastics can, when cut with a laser, give off fumes and gases that will damage the laser cutter (eg PVC gives off gases that will cloud the mirrors). What materials would you recommend? (I've attached a quick sketch of the general shape of the planned spring.) EDIT: I've added a rough sketch of the project - a torch, cut from acrylic. The four projections are to bind it together with an elastic band.  The switch operates like a syringe.

This looks like fun: the BUST Spring Fling Craftacular.It's an indie craft fair + dance in Brooklyn, NY on April 27.From their website:You are cordially invited to BUST Magazine's first ever Spring Fling Craftacular in Brooklyn! Save a dance for us and 50 of the finest indie designers and crafters at our Spring time craft fair and 90s themed dance!While shopping, sip on spiked punch and strike a pose at our Spring Fling photo studio (crowns and corsages provided) while dancing to the hottest jams from the 90s. $2 admission enters you into the Craftacular raffle featuring over $2000 worth of prizes!DATE: Sunday, April 27 from 11 am to 9 pmLOCATION: The Warsaw in Williamsburg, Brooklyn, 261 Driggs Avenue.

Hello everyone, I've come here for some help on designing a PVC-based air tank. I'm planning on building a pneumatic cannon that I can charge once and use to fire multiple short bursts of air. To do I decided to have two tanks -one large tank acting as the main tank and a local tank with a much smaller volume fed by the main. My problem is that I want to squeeze out all the air I can from the main tank, and I'm not entirely sure what the best way to do that would be. My current design uses a spring behind a wooden plunger so that as the volume of compressed air drops, the spring can extend and restore the pressure. (Image attached for clarity) Can anyone spot potential problem areas or places that could be improved?

Hi everyone I'm trying to get my hands on some compression spring latches, and have only been able to find them at McMaster.com, but they don't ship to Canada.  The latches I'm looking for are for this instructable: https://www.instructables.com/id/Underwater-Housing-for-miniDV/step2/More-shopping/ Any ideas where I can find this? I've been scouring the net for a while and can't find anything. Checked out local hardware stores, home depot, lowes, etc, and no luck. Looked at ebay, and can only find some guys from hong kong selling these and they're not made out of stainless steel (which is necessary; this project is exposed to a lot of water). Thx in advance.

I would like to help organize a meetup of makers and DIY types in the Colorado Springs area, to discuss making stuff and perhaps move toward putting together a hackerspace/fab lab. I have been posting notices on Craig's List and at the Makezine forums but no responses (yet). Surely there must be some like-minded folks between Denver and Pueblo.

GOT CRAFT?, Vancouver’s largest indie craft is celebrating its 11th show with over 50 handmade designers ranging from jewelry, clothing, ceramics and stationery, to plush toys, baked treats, and more! There will be plenty to do including DJs playing live music, food carts parked outside, and the Spool of Thread sewing lounge will be returning to host a slew of DIY workshops. Be one of the first 50 through the door for a FREE swag bag filled with goodies! what: Got Craft? where: Royal Canadian Legion – 2205 Commercial Drive, Vancouver when: Sunday, May 6th, 2012 10am to 5pm cost: $3.00 (kids 10 and under are free) link: http://gotcraft.com

Every year we get large puddles around our property in low lying areas. Our front sidewalk also dips down at our steps and gets a huge pool. I could shopvac the puddles but the problem is they REFILL slowly but consistently until the grass dries out during the spring thaw. This is a big problem because in the morning these large puddles are ICE and are slippery as anything. Then they thaw during the day and the cycle repeats - for a month or so.So I took an old cheap craftsman tool box and put in a 12v5A battery and a 12v5A pump. The pump uses 3/8" clear hose that you'd see coming from a condensate pump. I put in a 20 mesh filter reservoir thing to keep out small particles from the pump.I ran it and WOW - not only did it work perfectly but even my wife thinks it is "cool". The pump works at about 1 gallon a minute. I purposely did NOT want a high capacity pump. I wanted to move the water slowly and allow it to drain back in. Also if you move water slowly you have way less problem with sucking in leaves, etc. It just quietly does its thing and in about 1/2 hour the puddle is gone. The problem is - overnight the puddle comes back.So I'm going to wire in a dial to slow the rate of flow down.I'd also like to make a water sensor switch. The water has very little salt in it so no electrolytes to make good current. I tried zip tying two wires to the mouth of the intake and wiring them between the battery and pump positive side. No dice.Does anyone know how to make a water activated switch that would work here? If I could get that done I'd have both flow rate and auto on/off. Sweeeeet.

Would you like some advice on a project your working on? Perhaps you'd like a few ideas from a new source? You can comment here or email us at howdoi@instructables.com This week we didn't receive any questions, but that's not going to stop us. After spending several hours in the forums, I found twenty questions and let Jake pick numbers at random to see what we'd talk about. It was a lot of fun, but we prefer questions from all of you, so please don't be shy. You can listen to or download the episode below, listen over at archive.org or check it out at our homepage: download Resources: 12 - Remote Controlled LED -Field of Florescent Tubes -XBee's don't connect to the internet, they communicate with other XBee's. -An Ethernet Shield however, can do that! 04 - Automatic Electronic Cat Tail -Necomimi Brainwave Cat Ears -Shippo A cat tail that neither of us knew about when we were doing our talk. -EEG -ECG -DIY versions of EEG and ECG 18 - Gradually Brightening Alarm Clock -There's a few really good examples of this already being done. 05 - Solar Watch Winder -I found two separate videos to demonstrate how watch winders actually work. -Two homemade watch winders -A discussion on Sparkfun's forums on how to make a watch winder. 13 - Shoe Carousel -Something we didn't even think about -Perhaps you'd like to see a patent. -You could also see how other systems are made, and see if you can repurpose them for yourself. 16 - Homemade Air Brush -A couple of homemade airbrushes. -How Atomizer Nozzle's work 08 - Fireplace Soot -Creosote 17 - Ball of flame -Poofer -Flash Cotton/Nitrocellulose -Penn and Teller talking about danger in magic (link contains strong language). -Vortex Fire Ball

I have some springs at home and have seen some at my local hardware store but i cant tell whether to use the giant comression spring or just 5 smaller compression springs???

 Ive been interested in building a spring pole lathe and have noticed many are about 8 feet tall. Im planning on using a bungee cord as the spring so as long as theres room for the spring to stretch would 6 feet work as well. Thanks