What are the disadvantages of using lock nuts?

What are the disadvantages of using lock nuts?

A disadvantage of such a lock nut is that it is difficult to disassemble and reload. The second is to use two identical nuts to screw on the same bolt, and a tightening torque is added between the two nuts to make the bolt connection reliable. The third is a special locknut that needs to be used with a lockable gasket.

Can you reuse suspension bolts?

you can reuse them all, to some extent. they all have a torque-to number, then require a 1/4 turn, however i’ve done numerous jobs and reused them. these bolts are kind of expensive as well, keep that in mind.

Can lock nuts be reused?

Are Lock Nuts Able to be Reused? They are able to be reused, but only if the prevailing torque meets certain specifications. Lock Nuts with a Nylon Insert are perhaps the most reliable lock nut, as it is only limited by the temperature of the application it has been used in.

Can you use Nyloc nuts more than once?

For example, Carroll Smith (Carroll Smith’s Nuts, Bolts, Fasteners, and Plumbing Handbook) notes that the nylon insert is not damaged by installation and therefore they can be reused many times, and a Federal Aviation Administration Advisory Circular allows nuts to be reused if the prevailing torque is within …

What are the advantages of using lock nuts?

Traditional nuts simply consist of a basic threaded hole, so constant exposure to vibrations can knock them loose from the bolt on which they are placed. Lock nuts protect against loosening, however, by featuring a design that increases the nut’s resistance to vibrations.

What happens if you reuse torque to yield bolts?

Torque-to-yield (TTY) head bolts are designed to stretch when used. Once stretched, they are not as strong as before. Because the tightening procedure permanently stretches the bolts, there is a risk of breakage if reused.

Can you reuse camber bolts?

You can reuse camber bolts, but if they are slipping you can try spray painting the strut just before you put the bolts in. Lock them down, and then the paint will dry and help prevent them from slipping.

How many times can you reuse Nylock nuts?

– a nylock nut can only be used once and the nylon insert no longer performs its function to 100% of design .. therefore nylock nuts should be discarded and replaced after each use, or re torque.

Can you undo a Nyloc nut?

Lock nuts can be very difficult to remove. A lock nut will not loosen, even under intense vibrations. They are different on each side, making them very difficult to get off. Lock nuts come in various sizes for many different applications and are most often used by mechanics and engineers to hold wheels in place.

What happens when you reuse a nut and bolt?

Upon reuse, a nut and bolt combination will require an increased torque value to reach the desired clamp load. This results from the deformation of the nut threads. As the fastener elongates, it starts to apply a compressive load to the nut. The first engaged thread of the bolt experiences an enormous amount of tension.

What happens when you tighten a nut on a fastener?

Think of pulling on a fastened connection as if it were 2 stacked springs. Both springs stretch measurably, but the weaker one stretches more. Part of the external load is absorbed by the joint and part by the fastener. To be crystal clear, as you tighten the nut the bolt will compress the two parts together.

What causes a nuts and bolts connection to fail?

Put that same joint into service and subject it to the right kind of vibration, and there’s a good chance the connection will self-loosen and cause the joint to fail. In the 1960s, German engineer Gerhard Junker studied self-loosening and came to the conclusion that transverse vibrations were responsible for the failure of bolted connections.

Why are two nuts good for self loosening?

The reason why the two nut system is effective in resisting self loosening is due to the way the threads are jammed together (hence the term jam nut being frequently used for the thin nut). Since the bolt thread is in contact with the top flank of the small nut and the bottom flank of the top nut, relative thread movement is not possible.

What happens when you replace a lock nut?

The all-metal locking mechanism rubs the threads and removes the protective plating and damages the threads. This makes the bolt more prone to corrosion and galling damage. Replacement with a new nut does not restore the damaged bolt threads. The wearing away of metal tends to loosen the grip of the all-metal lock nut.

Why do VW suspension reuse self locking nuts?

For whatever it is worth, VW uses locking nuts on the suspension that don’t seem to be either nyloc or distorted threads, and the claim is made that the “locking mechanism” is one-time only. To ensure that the corrosion proofing on the nut is in good condition. Thanks for contributing an answer to Motor Vehicle Maintenance & Repair Stack Exchange!

What’s the torque on a self locking nut?

NOTE: The prevailing torque value is that required to thread the nut onto the bolt. It’s a measurement to ensure the locking mechanism is working as designed. Do not confuse this with final torque, which is that used to attach a fastener for use in service according to the manufacturer’s standards.

Can You reuse the nuts on a car?

But if you carefully clean and maintain your nuts, you can reuse them, at least until someone in authority tells you not to. Proper torque, proper job. Yes: “Torque to angle” on the suspension of a car. On a Opel Corsa the two bolts holding the strut to the steering knuckle get 80 Nm + 60° + 15°. – Martin Oct 4 ’16 at 7:20