weakyota91

my warn m8000 has 80 feet of cable so say in stuck 35 feet from a tree and run a snatch block from winch to tree and back to truck. I will have all my cable out. will i actually have close to 16000 pounds of pulling. Or am i understanding this theory wrong and a snatch block for closer pulls just to get more cable off the drum?

DeathCougar

iTrader: (23)

as long as you have at least 4 winds on the drum...a snatch block will effectivly double the pulling power. (Btw, an 8000 winch is only rated at 8000lbs for the first layer)

DeathCougar

iTrader: (23)

see:

Here

Here

And check this out too

DeathCougar

iTrader: (23)

and remember, its only effective if it loops/links back and attaches to a solid point on your truck, such as the front bumper.

1eye

Check out the Warn Winch site, they have a complete section on Winching Techniques. http://www.warn.com/corporate/images...PN62885-A2.pdf Also, make sure the snatch block your using "matchs" the cable size your running on your winch. Think Safety. There was a guy killed a couple of years ago by NOT using the "proper" procedure.

JamesD

Yes it will increase the capacity of the winch however it changes at certain angles.

James

91_4x4runner

You are effectively giving yourself a 2:1 mechanical advantage. While your winch reels in wire pulling you, the snatch block is also pulls your truck. So on your 8000lb first layer, if you used a snatch block, you would have 16,000 lb pull, yes.

tc

twice the power at half the line speed...

I've heard a rumor lately that you're not supposed to use a snatch block with synthetic line - seems bogus to me, any truth to it?

Robinhood150

I've heard that you shouldn't use a snatch block that's been used on steel cable because of gouges in the pulley could abrade the synthetic line. Otherwise, I don't see a problem.

4Mogger

I have not heard that...as long as you can keep the line from getting sucked into the space between the pulley wheel and the shell I don't see how this would damage syn rope.
As for half the line speed...seems as though that would be the case but it isn't exactly so. This is because line speed increases as the load decreases.
If we are talking an 8K# rated winch pulling an 8K# load--think very, very slow. Then run a snatch block and cut the load in half. Speed will more than double BUT twice as much rope has to be pulled in to move the same distance. With my HS9500 I have observed actually faster pulls with the snatch block since I have blazing line speed with a lighter load.
This is also easier on your battery and charging system.
I use a snatch block for virtually every pull. The other advantage is that it gets a bunch of rope off of the drum. This also increases the mechanical advantage and overall efficiency of the winch.

tc

OK - that makes more sense. I need to get a new snatch block anyways ... I just noticed mine is for 1/4" :pat:

burtonsnowman

Science says: YES. It effectively doubles the pulling force.

gregbreakseverything

Remeber pully's in grade 10 physics? sweeeeeeet!

midiwall

And keep in mind that you can keep adding snatch blocks for additional tug. One will double, two will triple, etc... (but like TC said, you're cutting your line speed in half as well, once for each block used). You can add as many as you want as long as you have line to thread through them and a place to attach the blocks to your rig.

The links that DC gave and the Warn site from 1Eye have diagrams...