Snatch Block Genius (1 Viewer)

[TeCKis300]

Mind blown by secret genius. Not exactly 200-series related but for all the gear we carry, this can be a great way to to save space with less gear and still do more. Maybe even less winch to save weight but still move big fat pigs.

This snaps straight to the good stuff @5:17 into the video, but worthwhile to watch from the beginning if you have time.

 

[Fisher23]

I still have not switched over to these winch recovery pullies.

It's kind of cool using the hole for a 2nd pully.

 

[BadReligion]

Pretty cool. Looks lighter than a conventional snatch block. It doesn't look like it would work with steel cable.

 

[Nooooooooob1]

I have these. Saved our asses in the woods of Kentucky. Definitely recommend.

 

[Endurbro907]

I've never seen these, definitely going to put it on the list though...

 

[highfructose]

I’m not an engineer…If you use enough of these (2-3) and end up with like 6-7 lines total, multiplying your pulling power by maybe 6-7 times, does this make the energy being put onto the rope also 6-7 times thus putting it and the shackles outside their safe rating?

 

[TeCKis300]

Hrmmm...

I just put a Factor 55 splicer shackle on my winch line and realized that would prevent me from passing the line through the small hole of pulley if I ever wanted to do this. Actually, anything other than a naked loop probably coudln't take advantage of this.

Do I go back to a naked line with just a brummel loop on the end?

They need to make a pulley with possibly a larger oval hole rather than just a small offset hole.

 

[TeCKis300]

I’m not an engineer…If you use enough of these (2-3) and end up with like 6-7 lines total, multiplying your pulling power by maybe 6-7 times, does this make the energy being put onto the rope also 6-7 times thus putting it and the shackles outside their safe rating?

For each line segment, the max pull is still only that of the winch (less frictional forces).

What you're saying is true where there are multiple lines segments combining force into a single anchor or shackle.

 

[TheIcemanCometh]

What I am missing here? It is a pulley system using a snatch ring as a non rotating twin pulley. Normally one uses a snatch ring as a non bearing but rotating single pulley which has better efficiency. A second soft shackle and another snatch ring could have been added into the system which would have been more efficient and still be simple. A traditional snatch block would have even better efficiency. So really a tradeoff between simpler vs efficiency (thus wear).

Here is a good discussion: How efficient are snatch rings compared to snatch blocks?

 

[Fisher23]

These rings sure are lighter and more compact than a snatch block, storage wise.

Myself, I very rarely use my snatch block, and when I do it's for moving trees or logs. vs moving the LC200.

 

[GordJ]

On a convention pulley system I was taught that the frictional loss per pulley “rule of thumb” is 10% per pulley. I can’t see it being any less on these non self fairleading, non rotating pulleys. Of course the 10% rule of thumb could be too conservative.

 

[TheIcemanCometh]

On a convention pulley system I was taught that the frictional loss per pulley “rule of thumb” is 10% per pulley. I can’t see it being any less on these non self fairleading, non rotating pulleys. Of course the 10% rule of thumb could be too conservative.

Watch the link I posted. The field experience was about 5% for a convention tackle block that has shives with bearings to reduce the friction. A snatch ring on a shackle being non bearing but rotating pulley system was about 10%. The video link posted above turns the snatch ring into a non rotating pulley and thus even more friction. It would be interesting to test such a system.

In the big scheme of things when setting up non rotating system it is not efficiency that would be of concern because of the reduced loads but the wear on the system rope. Of course if such systems are frequently used to pull a stuck rig one should rethink who they are traveling with .

 

[TeCKis300]

Snatch setups are still effective to increase pulling power and distribute anchorage. The fractional friction losses aren't going to be significant next to the almost doubling of pulling power. With some more trade to additional line, rigging, and line speed.

 

[highfructose]

Snatch setups are still effective to increase pulling power and distribute anchorage. The fractional friction losses aren't going to be significant next to the almost doubling of pulling power. With some more trade to additional line, rigging, and line speed.

Theoretically with 2 of these pulleys…you have a 6 line pull capacity?
1 for the winch and one where the line terminates…plus 2 holes and 2 roundabouts on the outside of the pulleys…

Is that right?

At 10% loss on each pulley, how’s that math work out?
.9x6?

Almost 65,000 lb pull with a 12k winch and $40 worth of synthetic cable pulleys?

 

[TheIcemanCometh]

Theoretically with 2 of these pulleys…you have a 6 line pull capacity?

Depends on how you rig it, for a simple pulley system (as posted video) you have three lines thus 3x. For a simple pulley system with N shives theoretically reduces the force by N. One ring acts a twin shive while the other a single because the "second" is a terminal.

 

[bloc]

but the wear on the system rope.

Bingo

Of course if such systems are frequently used to pull a stuck rig one should rethink who they are traveling with

Also a great point.

 

[GordJ]

Watch the link I posted. The field experience was about 5% for a convention tackle block that has shives with bearings to reduce the friction. A snatch ring on a shackle being non bearing but rotating pulley system was about 10%. The video link posted above turns the snatch ring into a non rotating pulley and thus even more friction. It would be interesting to test such a system.

In the big scheme of things when setting up non rotating system it is not efficiency that would be of concern because of the reduced loads but the wear on the system rope. Of course if such systems are frequently used to pull a stuck rig one should rethink who they are traveling with .

We have pulled a lot of pole butts out of the ground using blocks on the boom tip winches and I learned a lot of ways to destroy ropes and these rings don't impress me much. But I guess if your goal is to pull an empty flat deck sideways on a hard gravel parking lot this would be a good setup although I'd probably just put the Jeep in R and back up.
Honestly, I’d like someone to try rigging this set up in their garage and try to lift 100 pounds. It should be easy.

 

[TeCKis300]

I think this just awareness of options for whatever recovery situation presents itself. With more potential options for limited resources on hand. I wouldn't rule this out because of wear or being bad on a line as those are consumables in my mind. I could see mud or pulling a much much heavier load as where this strategy has the most merit.

 

[CreeperSleeper]

If you are interested, you might as well buy it from a Mud member: Recovery Ring Package - https://brennans-garage.com/collections/frontpage/products/snatch-ring-package

 

[laserturbo91]

We have pulled a lot of pole butts out of the ground using blocks on the boom tip winches and I learned a lot of ways to destroy ropes and these rings don't impress me much. But I guess if your goal is to pull an empty flat deck sideways on a hard gravel parking lot this would be a good setup although I'd probably just put the Jeep in R and back up.
Honestly, I’d like someone to try rigging this set up in their garage and try to lift 100 pounds. It should be easy.

You know you’re supposed to use a pole puller