Insert a Riv-Nut into the hole. This can also happen if the gasket area directly next the bolts is crushed, or if the bolts are not tightened evenly across the entire face of the joint. Reattach with a new bolt. If the nut is stripped it will need to be replaced. The combination of good bolted joint design, proper clamp force development, and suitable bolt retention devices can reliably secure a bolted joint against many of the challenges raised here. Mechanical devices. Try mixing something gritty with something gooey that won't dry out. are the roth stores taking bottle returns? Find a nut cracker at home centers or through our affiliation with amazon.com. Click here to find out more. How do you unclog a bathroom sink that has tissues stuck in it? Heat for about 15 seconds, but don't get it cherry red. ©2021 Industrial Indicators.All Rights Reserved, SmartBolts: Keeping the Power Flowing for Over 20 Years, Need for SmartBolts Technology Apparent at Off Shore Wind Energy Forum, SmartBolts Promote Safety for Plastic Manufacturers, Electrical Busway More Reliable with SmartBolts, 5 Causes of Loose Bolts – and 5 Ways to Prevent Them. It remains loose and won't stop spinning if I try to tighten it. No worries. Here are five basic types of prevention methods: Washers. If you can, try leaving it overnight. Liquid adhesives, as well as heated thermoplastic coatings or solid adhesive patches, have successfully been used to ensure bolts in certain applications do not come loose. Pictures of the issue are here: http://imgur.com/a/P81Ef. « SmartBolts: Keeping the Power Flowing for Over 20 Years, Need for SmartBolts Technology Apparent at Off Shore Wind Energy Forum ». Tighten the pliers until they hold onto the nut by themselves. Selecting an appropriate bolt retention device is essential to prevent loosening of bolts and maintaining proper preload. A nut splitter, also called a nut cracker, will crack any no-turn nut without damaging the threads of the bolt or stem that it’s screwed onto. Eventually, vibration will cause the bolt to “unwind” from the mating threads and the joint to lose its clamp force. I'm trying to assemble a squat rack, so having it well assembled is obviously important. In the application itself, proper development of clamp force requires that the correct level of tension (preload) in each bolt has actually been achieved – and remains at that level throughout its operating lifetime. Jump to Latest Follow 1 - 15 of 15 Posts ... You simply get a nut that fits snug inside the hex, buy a threaded rod, put the nut on the end, drill a hole through the nut and the rod and put some 1/8 inch music wire from a hobby store in the hole. Every review I've read praises the easy assembly so I'm not sure if I've received incorrect parts or if I'm just really really slow. Finished up a 5 HP Johnson today. Wedge-locking washers work in sets of two, with each washer having opposite facing wedges that interact with each other and with the joint and nut surfaces to prevent self-turning of the bolt. This may cause permanent damage to the joint finish or surface, which may be unacceptable, such as in critical aerospace applications where surface indentations may cause fatigue stresses. If the drive post is stripped it will need to be replaced, and this may mean replacing the windshield wiper motor. Get your answers by asking now. … You have to tighten it with a wrench ( or as they say in the UK "a spanner" ). the best way i have found, is to insert the tie rod in its area start the nut and put an open end wrench between the nut and the nut mating surface, the nut will tighten sooner since the wrench has taken up the excess space. Thanks for taking the time to help a complete novice who is out of their depth! Start by rocking the bolt by tightening then loosing, this may be all you need to break through the rust. Rolling down a highway at close to 1000-RPMs, proper bolt and nut tightening practices are essential here. This is not the time of the year i feel so forgiving to work on this car. Guessing that could be the wedge - seems to be straight on and not bent at an angle. Nylon inserts cannot be used in harsh chemical or high-heat applications, and typically can’t be reused because the bolt threads cut grooves into the nylon, diminishing its ability to hold after re-tightening. How to screw nut on deformed bolt without big hassle - YouTube Loose bolts are not just an … Many bolted joints include a thin, flexible gasket between the bolt head and the surface of the joint to seal the joint completely against gas or liquid leaks. This relaxation is caused by micro-embedding of the bolt head and/or nut into the joint surface, and can occur with both soft materials, such as composites, as well as hard, polished metals. A pressurized bolted flange joint assembly begins to leak, creating a safety hazard. … Adhesives. If the material of the bolt and the joint are different, large differences in temperature due to rapid environmental changes or cycling industrial processes can cause bolt material to expand or contract rapidly, possibly loosening the bolt. Differential Thermal Expansion. Visually there is a hole for the screw to go into, but it doesn't seem to tighten at all. I am a complete newb to anything even vaguely DIY related. The design engineers who specify the tension on a bolt allow for a break-in period, during which bolt tightness relaxes to a certain degree. While these devices do prevent the nut from falling off the bolt, they generally do not help the joint maintain the specified clamp force. There is a long bolt with ridges at the bottom for a lock nut to screw on and tighten. that's called a Lock nut. Several types of locking washers have been developed, with flutings, ribs or teeth that dig into the surface of the joint during the tightening process, in order to prevent loosening. This allows the blade to slip, deliberately, if it binds in the material. However, vibration tests show that many bolt retention solutions are less than successful in preventing loose bolts, and mainly act to keep the nut from falling off. Lock washers and lock nuts prevent this from happening. Step 3 Paint thread-locker compound all the way around the bolt threads as far down as possible. I got it off using the hammer hitting the socket wrench handle method that I read about some guys use....worked fine. Can you say something about the wood from ivy. Tighten This Bolt In Any Direction You Want ... and double threaded nut will tighten or loosen in the least desired direction when rotated any way. If the nuts on the bolts turn, but do not tighten, remove the nuts rather than cutting the bolt. In a bolted joint, tightening the nut actually stretches the bolt a small amount, like pulling on a stiff spring. The gasket itself acts as a spring, pushing back against the pressure of the bolt and the joint face. Castellated nuts have a slotted end and are used with a cotter pin or wire that fits through a hole drilled in the bolt. Experiments on bolted joints under vibration show that many small “transverse” movements cause the two sections of the joint to move in parallel with each other and with the bolt head or nut. All Rights Reserved. Turn the bolt clockwise to make it tighter, or turn it counter-clockwise to make it looser. So you have to force it a little and tighten it on past the blue nylon. By definition, an under-tightened bolt is already loose and the joint does not have enough clamp force to hold the individual sections together. Basically you're trying to make threadlocker compound but without the property that it dries out. Just as with vibration, this slippage can ultimately lead to loosening of the bolts. Embedding. The bolt appears to be getting stuck at a piece of blue rubber fitted into each nut. Something I did not see here: My SKIL 7-1/4" circular saw from about 1978 (still working) came with instructions to NOT overtighten the blade. Locking fastener systems have a shaped flat retainer, similar to a washer, and a clip that fits into a groove on the bolt head. Just slip the ring over the nut and turn the tooth into the nut until it breaks. I can't get the nuts to screw all the way on to the bolts though. Rather, brace the blade from turning; hand-tighten the bolt and washer; then wrench-tighten the bolt ONLY 1/8 turn further. How do you think about the answers? Use a nut splitter to crack the nut. Sign up to get your copy of our 27-page report: BOLTING Basics, Tips & Best Practices, ©2021 Industrial Indicators. You have to tighten it with a wrench ( or as they say in the UK "a spanner" ). Dynamic or alternating loads from machinery, generators, wind turbines, etc., can cause mechanical shock – a sudden force applied to the bolt or the joint – causing the bolt threads to slip relative to the threads of the joint. I think I over tightened it as now the bolt will turn as if to tighten when holding the nut with a ring spanner, and vice versa but I can get the bolt to neither tighten or loosen anymore. This stretching, or tension, results in an opposing clamp force that holds the two sections of the joint together. This stretching, or tension, results in an opposing clamp force that holds the two sections of the joint together. With their patented Visual Indication System, it is easy to determine that a SmartBolt in a bolted joint has achieved the proper level of tension, because it correlates fastener tension with color. Allow the oil to soak in for a time, then try loosening it with a wrench. Washers are typically wider than the bolt head, with the additional surface area adding extra friction to the joint to maintain the clamp force. An ordinary nut with an ordinary washer, used to fasten a bolt on something that is subject to repetitive vibration -- say, a wheel axle or engine accessory -- would eventually vibrate loose. Numerous clever gimmicks have been developed to lock a tightened nut into place on a bolted joint. Subscribe to our NewsletterKeep informed of our latest innovations in bolted joint safety and the solid science behind the only true measure of clamp force — tension. 2. A rotor with its blades separates from the nacelle and spins off a wind turbine, crashing to the ground. This can lead to sideways slippage between sections, placing unwanted shear stress on the bolt that could eventually cause it to break. Instead of using a wrench to hold the bolt, get a pry bar and pry in between the strut and the sway bar end. Because each solution can add to the cost of a bolted joint with additional equipment and man-hours for installation and maintenance, they should be critically evaluated before use. Still have questions? Then spray the bolt head with water to cool it quickly. For example, wedge-locking washers help maintain preload by not allowing the bolt to self-rotate. Why do house builders use drywall/sheetrock? However, simple split washers, sometimes called helical spring washers, have been found to actually loosen the bolt under vibration even faster than a joint with no washer. You can sign in to vote the answer. The Importance of Proper Fastener Torque. It may also prevent re-tightening of the joint to the proper tension. If the threads on the nut are softer, then they're the set that fails. There are at least five causes of loose bolts, which can occur separately or in combination: Under-tightening. Step 2 Slip a split, or lock, washer over the bolt end. Gasket creep. If the bolt comes loose, this clamp force weakens. as it is tightened it will wedge the conical shape of the tie rod in the conical mating surface on the other side. In this way, transverse motions that may cause one nut to advance will not affect the second nut. The easiest and most accurate way to verify that the proper preload is developed and maintained is through the use of SmartBolts. Sign up to learn about our latest innovations! The blue nylon portion of the nut is designed to keep the nut from coming loose later. Nylon or metal inserts inside a nut (sometimes called a “lock nut”) can add extra friction to prevent loosening. Shock. This means the bars of the rack don't fit together tightly because I can't screw it all the way on. All I need to do now is tighten up the flywheel bolt. Try and avoid 12-point wrenches and sockets as they likely to slip and strip the bolt head. If the nut was already very tight, you will need to loosen the retaining nut and remove the wiper arm for inspection. it won't go on as easy as a regular nut. Thread a self-locking nut on the bolt and tighten with the appropriate wrenches. nuts have a blue lock hard plastic that makes them ""LOCK NUTS"" --- so the nuts stay on and do not work loose ... use two wrenches that oppose to hold and tighten those lock nuts ..... the manufacturer did a good thing to give you lock nuts and make it a safe product ... added info to help you learn more DIY stuff == . If the joint has not been designed properly, or if the specified tension was not achieved on the bolt at the start, this embedment of the joint can lead to a loss of clamp force. Use a spanner on the bolt as well as the nut to stop the bolt turning while you tighten the nut. A modern application is a system using two nuts each having different sized threads which advance at different rates on a dual-threaded bolt. If the bolt comes loose, this clamp force weakens. I don’t see where lock-tight will hurt anything but I don’t think it is necessary if you get it good and tight. If the joint is not quickly retightened, the application may begin to leak fluid or gas, the bolt may break, equipment may become damaged, or catastrophic accidents may occur. just keep turning until it tightens. Heavy-weight grease plus sand might do the trick. What is Proof Load of a Bolt and How is it Different from Yield Strength. Screw in a bolt out appropriate size for the hole you drilled. SmartBolts can help prevent loose bolts – and the headache of leaks, breakage or equipment breakdowns – throughout the lifecycle of your application. It will spin if a ratchet is on one side but when I put one on the other side it will not tighten … On the other hand like I said I it won’t hurt. To loosen a nut or bolt that won’t come off, start by spraying the connection with penetrating oil. These repeated movements work against the friction between the bolt and joint threads that is holding the joint together. Double nuts. Vibration, embedding, gasket creep, etc., can affect the preload of any bolt, including SmartBolts. Cut the stripped or frozen bolts off the toilet with a pair of bolt cutters. No worries. I can screw it in all the way but once there it won't tighten like the other side. A good bolted joint will be designed with the proper size and type of bolt and nut, and specify the optimal amount of tension to achieve the clamp force required to maintain joint integrity. Let the bolt drop back into the frame. How to tighten a bolt and nut? I use this wrench along with a big hammer (2lb) to tighten this nut and have never had a problem with them coming back loose. Prevailing torque nuts. Genius Lifehack: How to Tighten or Loosen a Bolt when You don’t have the Right Wrench May 28, 2015 By Elisabeth Kruger 1 Comment So you’re stuck in a highly frustrating situation where you really need to unscrew a bolt but the wrench you have is the wrong size. I also tried pushing down while tightening and that didn't work … In a bolted joint, tightening the nut actually stretches the bolt a small amount, like pulling on a stiff spring. Twist the nut on and tighten it down with the appropriate wrenches. If your bolt is spinning, you will need to check if your bolt is stripped or your nut. hardware and auto supply stores have more of those lock nuts and bolts and your use of that will keep stuff in place and no rattles on the car .............. stuart is right ..they are locking nuts ..wont come undone once they are tightened ...you CANNOT do these up fingertight ..spanners every time. Sign up to learn aboutour latest innovations! Now I need to put the flywheel nut back on..so can I use the same method to tighten … Bolted joints are critical to the safe operation of many types of equipment in a wide range of applications, including power generation, manufacturing, mining, and transportation. To allow for more torque on the nut or bolt, slip a piece of metal pipe over the handle of the wrench to … I put 4 washers on there with a locknut bolt and it still won’t tighten to pinch the bolt to the frame. The blue nylon portion of the nut is designed to keep the nut from coming loose later. I just bought a piece of workout equipment and am having an issue with the assembly. All I have is a long bolt with a nut at the top, and the cap that sits over that so it is snug. There's no play in the ball joint though, so it's tight enough, and I'm fairly confident it won't undo on me as I've been trying for the last hour to remove it! its a 88 Sc model so not sure if i lost of nut or have to replace the alternator itself. Try this: secure the nut with a wrench or vise grips so it will not turn. They are supposed to be like that so they do not come undone. Under constant vibration from the engine of an ocean freighter, loose bolts on a large piece of mining equipment work their way off the bolted joints and roll around the hull, inflicting further damage to the equipment. There is also a small spacer. So I just got the chance to string up my guitar, and one of the bolts on my locking nut won't tighten no matter how much I turn it. Lock washers, when tightened to … it will be harder to turn once the screw gets into the washer in the nut. Use the bolt out to hold the bolt while you remove the nut. Tab washers have two tabs on opposite sides, which fold up to secure the bolt head or nut after installation, and may have teeth that can penetrate the surface of the joint to hold it in place. Damper rod bolt won't tighten. What are the best woods for making cutlery? Twist the bolt on the back of the pliers clockwise to tighten the grip. Olympic champ Klete Keller hit with 7-count indictment, 'Bachelor' contestant admits party photo was a mistake, Trump's most profitable asset is currently at risk, Brady to have 'minor' surgery after Super Bowl victory, Fauci predicts April will be 'open season' for vaccines, CEOs to workers: Stay home until at least September, Charges: Man shot staff one by one in attack, Popeyes' owner challenges chicken sandwich rivals, CNN host rips Cruz for breast milk tweet during trial, Biden: U.S. securing 600 million vaccine doses by July, Valparaiso is ditching its Crusaders nickname. The wedges are designed to add tension (stretch) to the bolted joint if the bolt begins turning due to vibration or shock, preventing a loss of clamp force. Something that might just get you by is to put some tension on the threads. Vibration. Conical, or Belleville washers, are cup-shaped washers that perform little better than spring washers in vibration tests. Overtightening will cause its strings to be bent out of shape and the bolt will never tighten. It was always like this even from the first time I put it together but I … The lock nut gets stuck on the ridges pretty soon after I begin to tighten it. Once you've established that it's safe, aim the flame at the bolt head or nut, not the surrounding metal. The problem is that they make it harder to disassemble the joint later. Because the insert on most lock nut styles only covers part of the internal threads, a strong transverse motion or shock can still cause the bolt to self-loosen. The least labor-intensive way to break a rusty lug nut free is by soaking it in a product like WD-40, PB Blaster or some other oil-based lubricant. Either or both will need to be removed and replaced with a bolt/ nut that isn’t damaged. Think about a car, about its spinning wheels. Loose bolts are not just an irritating nuisance. Spray it at the base of the nut and wait, as long as you can, for the oil to work its way through the threads and between the nut and the metal of your hub. If the nut just spins in place and does not tighten, either the nut or the drive post may be stripped. Later, routine checks of bolt tension can be performed more often, and more quickly, so you know at a glance that the bolts are properly tightened. or what.arg :mad: Without these sharply formed threads, nuts and bolts simply cannot tighten. I'm using the parts provided by the manufacturer. According to an article in Fastener + Fixing, the idea of using two nuts, a thick one and a thinner one (called a jammer nut), has been used for over 150 years to prevent loosening of bolted joints. The bolt on the right side of my power tower that holds the pull-up bar in place won't tighten all the way. I tried both ways, so it wasn't just me turning it the wrong way. Try that maybe the corn nut is two piece but you have a dremel or an angle grinder just stop short of the threads on two sides then give one half a twist with the vise grip Click to expand... Two piece acorn nut is the same thing I was thinking. Because loose bolts are so common, an astonishing array of devices has been invented to prevent them from occurring. Drill a pilot hole in the center of the bolt. Go at an angle a bit and try to bind the bolt against the strut. A related idea is to fit a spring inside the nut, which firmly grasps the bolt threads and is designed to move in the opposite direction of the nut if vibration or other forces cause it to unwind. The pliers will have a metal bolt on the top handle of the pliers. I have annoying belt shreek coming from the belts and the bolt on the lower part of the alternator is not tightening. Step 1: Use Some Muscle Try a 6-point wrench or socket on your seized nut/bolt. Join Yahoo Answers and get 100 points today. Keep a fire extinguisher nearby. Over time, and especially near high heat or corrosive chemicals, the gasket may “creep,” which means it loses its springiness, leading to loss of clamp force. At the end of the bolt I keep turning the nut right but it gets to a point where when I turn the nut the bolt turns with it … You might be able to expose a couple of more threads. Try it out on another bolt/nut combo FIRST, to see if it works, before gumming up your target bolt.