Winch Shear Pins - Page 8 - Steel Soldiers::Military Vehicles Supersite

Recovry4x4 · 02-05-2009, 21:00

The bolt combined with crisis winching will yield a broken winch. Be careful!

Jakelc15 · 02-05-2009, 21:16

No that's not what I meant. I will not use a bolt but was going to try to use 5/16" 2024 T3 Aluminum round rod instead of the hard to find , no one will call me back about, oem size!

Evilone · 02-05-2009, 22:25

Sorry if this is a bit off off topic, but all this talk of shear pin material, temper and shear strength along with bits of block and tackle use is quite interesting and informative. Recovery is also part of my job and thought it relevant to mention that there is a great manual http://tinyurl.com/dj47fq in the TM's section, and just wanted to bring it to the attention of those that may be performing their recoveries safely and correctly or those who may have little knowledge but the means to injure or kill themselves or someone else let alone damage a very important piece of equipment. It is not a good thing to see a wrecker towing another wrecker due to stupidity or ignorance. It also may be a refresher for some and that is a good thing. I've benefited from going through some of the not so run of the mill 4:1 pulls and pick up on something forgotten from lack of enough practical use. I still enjoy rigging - it's good fun, but why does it have to be so frickin heavy!

avengeusa · 02-05-2009, 22:31

I can turn a few down, i have a lathe, and a mill

give me drawings

.280 dia, and exactly how long, and what size holes do they need to have, I have brass, and a couple different grades of aluminum......

Jakelc15 · 02-05-2009, 23:04

What I was trying to do was find the right rod stock so that anyone here could buy it and hack saw off the appropriate length and drill a couple of cotter holes in it. I think the 2024 Aluminum in a T3,T4,or T361 would be almost exactly what the Gi issue ones are. And the Gi ones are about 9/32" diameter. Which is hard to find in the proper alloy and temper. But if the 5/16 rod will fit it may open a whole new door to easier availability. And if your looking for the 9/32" 2024, goodluck, Alcoa doesn't cold form 2024 in that size. But then again those of us with access to a lathe can make all the shear pins we want out of 5/16" stock!

jasonjc · 02-05-2009, 23:15

This place has 2011T3 in 9/32". How does the 2011T3 compare to the 2024???

http://www.speedymetals.com/default.aspx

Jakelc15 · 02-05-2009, 23:29

2011T3 32,000 psi shear strength. 2024T4 about 42,000 PSI shear. GI original is about 44-45,000 psi.

smoothnu · 02-12-2009, 22:58

The shear pins that came with my truck were strong enough to drag the truck while it was locked down.

Jakelc15 · 02-13-2009, 21:49

I kind of dropped off looking for this, other things going on. I contacted a bunch of distributors and the ones that did contact me back didn't have what I was looking for. I'm going to try a local place again for 5/16" 2024 and see what kind of strength that yields.

smoothnu · 02-14-2009, 11:29

AL 2024 T3 or T4 has a tensile of 68000 psi a yield of 47000 and most important (to us anyways) shear strength of 41000 psi. I have no idea if this is to much for these winches or not. So I am probably going to go with AL6061 T6 which has a shear strength of 30,000 psi. You can buy a 5/16" 3' section for $2.26 at Reid supply company P/N mes-434 . This beats the heck out of the $3.50 per shear pin price.( I don't mind cutting my own.) Now, this info was relayed to me by a co worker. It being the weekend I have not been able to verify this myself. I hope this accurate and helps all of us that are in the shear pin dilemma. I will soon see. By the way actual size may be 9/32" but would it hurt anything and not be easier to drill out the pto shaft to 5/16" than it would be to turn down 5/16" stock to 9/32"? Seems like 5/16" material is a little easier to find. Just a thought