The idea is to use a thin nut on the bottom to ensure that the backlash is maximised so that the top nut is tensioned such that the upper flanks of the nut are in contact with the bolt flanks after tensioning therefore eleimiating the ability for relative movement between the bolt and the nut. By using a thick nut your tension applied my not result in the top nut desired flank contact due to lack of movement during pretensoning
Great video. Very good explanation. I have a question that I cannot find an answer to, regular everyday hex nut. both sides are chamfered, or one side may "seem" to be "more machined" or "flatter", is there a correct side to install against the material being tightened or is it just a preference call? Thank you again.
Hello Mrchip3040! There are several types of nuts that intentionally have a rounded top such as the stover nut: www.albanycountyfasteners.com/Zinc-Stover-Hex-Lock-Nuts-p/1102-116.htm In most cases, nuts are meant to be tightened against a washer. The reason for this is that a washer provides a smooth flat surface to tighten against. Without being able to see or determine the kind of nut, and assuming it is a standard hex nut, you will probably want the flatter side to be face down against the washer.
I landed on this vid looking to find something that would explain why I have hex nuts that have slop when fitting on a 10-24 screw. They screw on easily, but wobble. Do jam nuts have a lot of play? These nuts also don't thread onto 10-32 (fine) or 5M-0.8 which is the closest size of metric.
I have a very hot and massive vibration case, a two-stroke header I'm having a hard time finding a good solution for. I was hoping to use this method but it may not be the best. Do you have a better idea you can pass on? Thank you.
@@brendonboville4813 Sorry Brendon, I think we had a misunderstanding. If you put a jam nut on and tighten it against a finish nut, it would be no different from putting on a finish nut and then tightening it against a jam nut. It's actually the exact same connection just in a different order on the bolt. A jam nut is just a thinner nut that you tighten against a nut of a different type. The only difference between a jam nut and a finish nut is that a jam nut is thinner. It will tighten up nicely regardless of which way it is applied.
I think the confusion is coming from the application. In a situation where you are tightening a a nut against a material, you are right, you would use the material, then the jam nut, then a standard finish nut. However, in the application mentioned in the video about creating a free spinning fastener assembly by tightening the two nuts against each other, the order won't matter because there is no third force acting on the two nuts. They are only tightening against each other.
The idea is to use a thin nut on the bottom to ensure that the backlash is maximised so that the top nut is tensioned such that the upper flanks of the nut are in contact with the bolt flanks after tensioning therefore eleimiating the ability for relative movement between the bolt and the nut. By using a thick nut your tension applied my not result in the top nut desired flank contact due to lack of movement during pretensoning
Good video Bob !
Thank you for watching!
Great video. Very good explanation. I have a question that I cannot find an answer to, regular everyday hex nut. both sides are chamfered, or one side may "seem" to be "more machined" or "flatter", is there a correct side to install against the material being tightened or is it just a preference call? Thank you again.
Hello Mrchip3040!
There are several types of nuts that intentionally have a rounded top such as the stover nut: www.albanycountyfasteners.com/Zinc-Stover-Hex-Lock-Nuts-p/1102-116.htm
In most cases, nuts are meant to be tightened against a washer. The reason for this is that a washer provides a smooth flat surface to tighten against. Without being able to see or determine the kind of nut, and assuming it is a standard hex nut, you will probably want the flatter side to be face down against the washer.
I wish you guys were still here in Albany County.
It would be nice to see what you were doing with the bolt to fit the t nut, even tho I ca work it out, others may not.
I landed on this vid looking to find something that would explain why I have hex nuts that have slop when fitting on a 10-24 screw. They screw on easily, but wobble. Do jam nuts have a lot of play? These nuts also don't thread onto 10-32 (fine) or 5M-0.8 which is the closest size of metric.
Thanks for the explanation.
do we have to put a flat washer between the nuts? before tightening up?
No. The locking action of jam nuts tightened together does not require a washer between them.
How to install an adapter along with jam nut while trying to install a new knob shifter on a super beetle
I have a very hot and massive vibration case, a two-stroke header I'm having a hard time finding a good solution for. I was hoping to use this method but it may not be the best. Do you have a better idea you can pass on? Thank you.
Safety wire nuts/bolts.
Thanks
what about extreme heat variation cycles and vibration with that locking technic ?!
Super
Nice gloves.
Thank you for your feedback.
you are supposed to use a jam nut first then a regular nut...
It ultimately wouldn't matter which is screwed on first. As long as they are secured up against each other you will get locking action.
@@AlbanyCountyFasteners not according to 50 years of testing and training
@@brendonboville4813 Sorry Brendon, I think we had a misunderstanding. If you put a jam nut on and tighten it against a finish nut, it would be no different from putting on a finish nut and then tightening it against a jam nut. It's actually the exact same connection just in a different order on the bolt. A jam nut is just a thinner nut that you tighten against a nut of a different type. The only difference between a jam nut and a finish nut is that a jam nut is thinner. It will tighten up nicely regardless of which way it is applied.
I think the confusion is coming from the application. In a situation where you are tightening a a nut against a material, you are right, you would use the material, then the jam nut, then a standard finish nut. However, in the application mentioned in the video about creating a free spinning fastener assembly by tightening the two nuts against each other, the order won't matter because there is no third force acting on the two nuts. They are only tightening against each other.