Winch Shear Pins - Page 10 - Steel Soldiers::Military Vehicles Supersite

tjcouch · 05-07-2009, 17:59

Some questions after reading this thread:

If your cable is in good condition, and you have the mil spec shear pin, is there any way you could snap the cable? Just a safety question - I am sure the designers had personnel safety at the fore front - just wanting confirmation.

Second: why on earth is it rated at 10K? Good lawrd, the wee electric winch on my Jeep is rated at 8K. Does the pin shear at 10K? Is that the idea?

When a pin shears, does the cable just drop to the ground? I would assume at worst the drum might spin in reverse a could of time as it unloads - has anyone observed this?

mudguppy · 05-07-2009, 18:30

the winch is driven by a worm gear - it does not free-spin while the clutch is engaged.

ETHOS · 05-07-2009, 18:38

I have broken shear pins, multiple, and 6061 is not near as tough as the stock ones

I have also broken 2 cables, the cable just drops to the ground, and does not unspool the drum

Jakelc15 · 05-07-2009, 18:40

•Cables break when misused or damaged.
•Yep it's under rated, get a snatch block.
•When I broke my shear pin, the winch just stopped. No cable lash.

Jeeperjoe · 05-07-2009, 23:14

With my past towing experiance you Need to use snatch blocks... If im not mistaken these trucks weigh in at what 13,000-13,500 lbs and the winch is rated for what 10k? yeah time to use the block... or 2 also when you watch the military (current era) recover a vehicle they use ALOT of snatch blocks to the point of where approx 5-10 soldiers can extract a vehicle by hand.... snatch blocks are indeed your friend and if used correctly can save you ALOT of headache.... ( and shear pins )

m16ty · 05-08-2009, 20:09

Quote:

Originally Posted by tjcouch

Second: why on earth is it rated at 10K? Good lawrd, the wee electric winch on my Jeep is rated at 8K. Does the pin shear at 10K? Is that the idea?

PTO winches are rated pretty close to accual line pull. Most electric winches use some sort of formula to rate their winches that takes into account for rolling loads ( which is wrong IMO). Bottom line is you can take a 12,000lb electric winch and a 8,000lb PTO winch will outpull it.

Orionspath · 05-08-2009, 21:29

Memphis Equipment. That's all I've got to say about this.....

USMC6062 · 06-12-2009, 20:45

I used my winch for the first time today, what a disappointment. I was trying to pull a K5 blazer out of the mud that was barried to the frame. The first time I put tension on it, the shear pin broke. I didn't even feel much of a strain on the winch, or hear anything pop. The pin I had in it came from Saturn Surplus. I put another pin that I found laying in the tool box of my latest duece purchase. I was able to winch my now stuck self out, but that second pin sheared right before I had the cable almost reeled in. The second pin at least held long enough to feel like the truck was doing something, and "popped" when it let go. I think it was Doghead who had trouble with Saturn's pins, and I'm thinking too, that they are made of weaker material. I'm gonna start making my own out of something, I may try brass, I saw it mentioned in here that it had similar shear strength to the aluminum pins.

Big CASE · 06-13-2009, 00:33

Hey all CASE here , I have a M35-A2 winch Truck for recovery.. it is what I have dun for so time..
If you have the aluminum pin good if you are going to use the winch a lot or just on BIG things you are going to want a Farm hitch pin , you will have to cut it down too fit and pin it in place .. or you can go get (cool roll steel ) and make a pin .. if you are going to use a grad 8 bolt buy 6 or 7 of them , they will brake and you will need new ones..
if you are winching .. you want to be at 1,000 RPM NO more that this speed you can move any thing & use you hand throttled .
and if you have to winch some thing BIG use a stanch block and make a 3 or 4 lines . you can make your 10.000 pound winch into 40.000 pounds or bigger ..

m16ty · 06-13-2009, 01:01

I wish everybody recomending using steel bolts or pins (of any grade) would take a look at these threads.

Shear Pins do Work!

Winch Fragged

I have also seen the PTO ripped off the side of the trans.

If you want to take the chance of destoying your winch go ahead and use a steel pin. I know it seems the AL pin is too soft and there could be another material that would give better performance but steel is not the answer.