Recovery forces

[Pickle]

Again, you've got me thinking.

I measured my pin - 16mm diameter.

Using a commercial recovery adaptor, I would say the pin is in a "double shear" situation (rather than experiencing bending forces). So, what's it rated to?

I went to google for some help with calculations, and instead found a document from Purdue University: https://www.extension.purdue.edu/ext...ppp/ppp-94.pdf

A table on page 19 lists double shear strength for various pin sizes. As an American document, it's all in imperial measurements - 16mm is a fraction over 5/8".

A 5/8" hitch pin, according to Purdue University, is rated to 27,000 pounds - a little over 12,000 kg. Does that sound like enough for an 8,000 kg snatch strap?

That 12,000 kg is for a Class 2 pin - weak steel.

A Class 5 pin is listed at 44,000 pounds, or 20,000 kg.

A Class 8 pin is listed at 55,000 pounds, or 25,000 kg.

I don't know the class of my hitch pin but I'm not going to lose sleep over it, either.

I got told when I was doing my driver training that it is 13,000 kg on the pin before it starts to bend.
Dave

[Jasonmc73]

I got told when I was doing my driver training that it is 13,000 kg on the pin before it starts to bend.
Dave

But if i have a recovery hitch, i'm not saying that's not correct, but it can't really bend.My 50mm receiver is filled with a recovery hitch & either side is shear, as pins supported by the hitch was my thinking?

But i guess there is some room for bending all the same