Need 33K snatch block!!!

[Desert Drifter]

Had my local 4x4 shop order me a Warn 33K snatch block. Came today. Very disappointed. Cheap pot metal looking thing made in China. Stamped 6 TONS. Where I went to school 6 tons equals 12000 lbs!!!

Anyone know of an American made 33k snatch block?

Thanks...........DD

 

[Master-Pull]

Yes. I have two that we make in Whatcom county, one is a 45,000lb block and the other is a 60,000 lb rated block. Both made in the USA from quality materials, to our specifications.

PM me if you are interested and I can get you pricing on the 45k block, we should have a lighter block built in the next few months as well. If you are set on a 30,000lb block now then you can use one of our sealed ball bearing blocks that we used to import (from Europe) before we made our own.

-Alex

 

[bcrez]

I'm sure they just sent you the wrong one, because they do advertise a snatch block with a 33k pound capacity. The cheap factor is another story...

http://www.warn.com/truck/accessories/snatch_blocks.shtml

Gunnebo Johnson makes snatch blocks all the way up to 30 tons.

http://www.gunnebojohnson.com/johnson-block-products/snatch-blocks/

 

[opie]

Had my local 4x4 shop order me a Warn 33K snatch block. Came today. Very disappointed. Cheap pot metal looking thing made in China. Stamped 6 TONS. Where I went to school 6 tons equals 12000 lbs!!!

Anyone know of an American made 33k snatch block?

Thanks...........DD

They sent you a 42,000(based on a 3.5:1) or a 36,000(based on a 3:1) tensile block. Most of the ones Ive seen have a 3.5:1 safety factor. the 6 tons is a WLL, not a tensile. (I'm guessing)

If you want a block that has a WLL of 33k, that's gonna be a heck of a block.

I don't know why most of the recovery suppliers rate their blocks at tensile rather than WLL. Its all so convoluted and dangerous.

 

[opie]

I'm sure they just sent you the wrong one, because they do advertise a snatch block with a 33k pound capacity. The cheap factor is another story...

http://www.warn.com/truck/accessories/snatch_blocks.shtml

Youll notice in the above link, the one in the picture on the right has "WLL 6 ton" cast into the side. Youll break your winch line before you come close to that block failing.

Heres a write-up I did on WLL, SWL and MBS

 

[bribassguy]

It's not a mistake. The number stamped on the outside is a Working Load Limit (WLL) and Warn is rating 33,000 lbs maximum capacity at a 2.5 Safety Factor (which IMHO is pretty low).

6 Ton WLL * 2200 (Lbs/Ton) * 2.5 Safety Factoy = 33,000 Max

The warn PN 63490 is a 6 Ton WLL yarding block, you can actually read that on the picture if you look closely. It's the same as the BLOC1250 sold through allenmachineco.com but you paid extra for the Warn Factor.

I am pretty sure that this has been covered before once, if you search for yarding block you may get your answer.


EDIT: Found the thread. http://www.expeditionportal.com/forum/showthread.php?t=38336 and it looks like some others have answered while I was typing.

 

[PNWDad]

Try these out for size:
http://www.arbusa.com/Products/Tow-Straps-And-Recovery-Gear/Snatch-Blocks/Snatch-Block-9000/106.aspx

We looked at the Warn ones, then bought these instead.

 

[Antichrist]

I don't know why most of the recovery suppliers rate their blocks at tensile rather than WLL. Its all so convoluted and dangerous.

Using WLL is the industry standard. Look at your shackles, they all say WLL.

 

[bribassguy]

Yea thompson is good and it will soak in, also you should put a coat of arcrilic varnish on it for long lasting durability and shine, i use it on my wood tacle on a sailboat.

Whiskey Tango Foxtrot Romeu

1. How does that relate to the thread? Did you some how get mixed up?

2. There is no way I'd recover a vehicle with a wooden block.

 

[Eventhough]

A 6 ton WLL block is a BIG block and more than most people will need. I'd run a 6 ton WLL block and not worry unless you have a HUGE truck.

 

[bribassguy]

His Truck is pretty big. 2011 F250 SuperCab lists curb weight as 6286# and GVW of 10000# so figure the WORST case is stuck to the frame rails going 45* up hill fully loaded.

That makes GVW*1.75*3 => 10 000 * 1.75 * 3 = 52,500


*Thanks to BillaVista Recovery via Pirate4x4

 

[PNWDad]

So buy 2 of them if your planning on being that stuck!

Plus if your that stuck you might need more then just a winch to get you out. Maybe a backhoe attachment like a unimog has? Does anyone have a retrofit kit for a backhoe bucket? haha:Wow1:

 

[opie]

Using WLL is the industry standard. Look at your shackles, they all say WLL.

Industry standard and required for overhead lifting. Are you vertical lifting your rig during a recovery? The shackles have a WLL cast into them because they are designed for overhead lifting and are required to have a WLL in order to be sold in the US as rigging apparatus.

The confusion is the multitude of safety factors, if any at all. Your shackles carry a 4:1, some hooks carry a 4:1 or 5:1 or 6:1. Then you have some blocks carrying anywhere between 2:1 through 5:1. Ignore the WLL cast into your gear. Find it's MBS and set your own safety factor and use the same factor for everything in your kit. That way YOU know what your equipment is rated for. 3:1 or 4:1 is sufficient.

 

[bribassguy]

Like Opie said there is no real standard for Off Road Recovery gear like in Overhead lifting. This is a good over view of WLL SWL & MBS (I'd hope he'd agree, he wrote it)

Read: http://centraloverland.com/blog/?p=327

ARB tends to be a little fast and loose with the Safety Factor: ARB9000 specifications list:

working load: 19,800lb
breaking strength: 38,500lb

So the safety Factor here is a little less than 2:1, which mean in a double line pull you'd exceed their Working Load Limit with a 10K winch.


One thing to remember is that there is ALWAYS a weakest link in every recovery system and you should really spend some designing it in: IE It makes no sense to go out and get a HUGE winch, run Superline XD through a 33K block and hook the hole thing up with cheap Chinese shackles.

 

[opie]

bribassguy, I did that write up and I do agree with it!! Thanks for posting it. Its relatively general, but I think it hits on the majority of points we should all be thinking about.