That does sound crazy. Was taught in A&P school that at least two or three threads need to come through the nut for proper torque. Who's right?Per ASTM, 2 threads in the nut will hold the shear strength of the bolt. Not sure I would agree either, but if Kubota can save $.03/bolt……I prefer to see at least 2 threads sticking out of the nut. My experience in MV switchgear has never been pleasant with short bolts.
There are two strengths for a bolt. The shear strength is when it is being loaded ”sideways“ like it is a pin. In that case you are trying to cut the bolt into two (or three) pieces. The nut is simply acting like a pin or circlip to hold it in place as it is being cut. That is what the post shows where this discussion started.That does sound crazy. Was taught in A&P school that at least two or three threads need to come through the nut for proper torque. Who's right?
Paging runs with scissors!
You didn’t get the picture to post. I think you need five posts before you can put in a photo.Well, new here to the site… I’m looking at my L3901 that is partially submerged under water due to the flooding in SC on the Edisto River!!! It’s fresh water but I’m debating on cranking it and moving it until the water goes down. I can’t find any information on max fording through water. Thanks for any advice and this is a great site!!!
It is up to the axles but not up to the air inlet. I was a little worried because hydraulic filter and oil filer are partially submerged. River crested last night and is going down. Still might just wait.You didn’t get the picture to post. I think you need five posts before you can put in a photo.
But if the water was above the air filter inlet DO NOT try to crank the engine!
if it was up to the axles and still sitting in the water I would move it out of the water under its own power or pull it out is probably best.
It is up to the axles but not up to the air inlet. I was a little worried because hydraulic filter and oil filer are partially submerged. River crested last night and is going down. Still might just wait.
Note that the picture in their article shows a typical bolt with threads that are not complete for nearly two threads.There are two strengths for a bolt. The shear strength is when it is being loaded ”sideways“ like it is a pin. In that case you are trying to cut the bolt into two (or three) pieces. The nut is simply acting like a pin or circlip to hold it in place as it is being cut. That is what the post shows where this discussion started.
The second strength is in tension (pulling the head) and does require the full nut engagement with a couple of extra threads to get the full tensile bolt strength.
For simplicity most people are taught that ALL bolts must go through the nut. And that is best in both conditions and easier to always do the same thing.
Here is a link to more information if you are interested