Decent Deal on ARB Snatch Block

[Antichrist]

I believe it was commissioned by the UK distributors of Milemarker hydraulic winches, and was set up to illustrate why, for any long pulls, a hydraulic winch is so much better than an electric.

Well, that's sort of a no brainer IMO, speaking as someone who's done a lot of winching with electric, hydraulic and PTO winches. Not sure why they even felt a need to prove it.

It seems to me, that stock winches supplied and set up by the distributors, in accordance with their own recommended standard procedures

In fact I'm more confident in my own setups based on the winch specs (assuming they are accurate) than out of the box. A lot of the supply cables appear undersized to me and won't allow the winch it's full capacity due to volt drop. Granted I haven't looked closely recently, so maybe the mfg's have gotten better.

 

[michaelgroves]

I was amused by these two quotes from the report:

Purpose:- To simply test the single line pull of a number of the UK's most popular 4x4 winches.

(Notes) 5. All dynamometer readings taken at the posts were "instantaneous" and therefore may vary between vehicles on the same slope, without the overall line loads varying to any great extent.

So what were they measuring? What was the point of the strain gauge, if, with the same load, it gave completely different readings?

 

[skysix]

How NOT to use a winch or snatch strap...

 

[AlexJet]

This is the first time I'm seing 18-wheeler frame torn apart. I've seen ripped off bumpers, but not frames....

 

[michaelgroves]

This is the first time I'm seing 18-wheeler frame torn apart. I've seen ripped off bumpers, but not frames....

Yes, it's funny, but must be photoshopped.

 

[skysix]

Nope - but was hauling 60 tons or so before the operator of the grader that was trying to give him a tow started moving WAY too fast...

 

[R_Lefebvre]

Does anybody make a double pulley block for off-road use? Seems it would be nice to have a compact lightweight unit for if rigging some crazy pull. I konw the farm stores will have big cast iron ones, but wondering about a light offroad version.

 

[Antichrist]

I've been looking for the same. Haven't found one yet.

 

[AlexJet]

Does anybody make a double pulley block for off-road use? Seems it would be nice to have a compact lightweight unit for if rigging some crazy pull. I konw the farm stores will have big cast iron ones, but wondering about a light offroad version.

BTW, Rob, I'm selling T-Max snatch block if you're interested. It's brand new in the original holster and it's cheap as I don't need it.

 

[Antichrist]

BTW, Rob, I'm selling T-Max snatch block if you're interested. It's brand new in the original holster and it's cheap as I don't need it.

I'm interested in in picking up another snatch block, depending on the price and capacity. The only T-Max I can find though is only rated to 8,000kg though.

 

[AlexJet]

I'm interested in in picking up another snatch block, depending on the price and capacity. The only T-Max I can find though is only rated to 8,000kg though.

It's yellow with 8'000 kg /17'636 lbs rating.
I'd give it for $50 shipped to you by Postal Office.

 

[R_Lefebvre]

I've been looking for the same. Haven't found one yet.

I guess realistically most people wouldn't use it that often, and having more singles would be more useful, for if one needed to do a Z pull or something.

Now, I do carry a pair of... next size up, 7/8" shackles? for the far side of the pulley block since it can undergo double the force of the truck side. They're cheap and seems like good peace of mind.

Alex, thanks but you can let Tom have them if you want.

 

[Antichrist]

It's yellow with 8'000 kg /17'636 lbs rating.
I'd give it for $50 shipped to you by Postal Office.

Thanks, but that's less than a dual line pull on my RE10000 and not enough of a safety factor for me on my 8,000lb winches.

 

[michaelgroves]

I'm interested in in picking up another snatch block, depending on the price and capacity. The only T-Max I can find though is only rated to 8,000kg though.

When you say "rated", that surely can't be the breaking strength? The heavy duty ARB is 38,500lbs (breaking strength) and 19,800lbs working load. The standard ARB is 30,000lbs breaking strength, so presumably 15,000lbs working load.

If the T-Max uses a similar 50% margin, it seems to be heavier duty than the standard ARB at 17,500lbs, vs 15,000lbs.

 

[ARBTECH]

Hi Guys,
thought it might be useful to get some information on the 9000 snatch block directly from the source as there has been a variety of published information on that part number (including by us of all things) that is incorrect. I asked Daniel Bongard, the engineer who was in charge of development of that snatch block to read through the thread and give me his thoughts. Below are his comments.
Thanks,
Marc
ARB USA


Well, for starters the published breaking strain on the box is 38,500lbs – not 30,000lbs...so I don’t know where that web site got those specs from.
Ref: http://www.oconeeoffroad.com/servlet/the-4149/ARB-Snatch-Block/Detail

Next...I don’t know where we got the breaking strain for the packages in the first place, we have never broken one, and our test press stalls out pulling on them at 46,000lbs.

And for the record, winches are only capable of pulling their specified maximum if they are wrapped around the bare drum (as was mentioned in the thread) and if they suffer NO VOLTAGE DROP which requires the transformer out of the Back To The Future Delorean in order to power it without suffering voltage drop. We burned out 3 brand new winches trying to test the 9000kg snatch block (without damaging the snatch block) before we gave up and used diesel tow power instead.

Hope that helps!



====================================================
Daniel J Bongard (MEng)
====================================================
Product Development Supervisor
ARB 4x4 Accessories, AUSTRALIA