How heavy of a ****** block are most people using, and approximately what size pulley do they use? Where can I find them. Local hardware and part stores don't carry anything even close to the right weight rating.

Using a Warn 2000#, doubling back to create a 4000# load rating, you would assume a minimum of 4000# ****** block rating should be used, right? The largest ****** block rating I have been able to find, without being for tractor use, has been rated at 680lbs, and used a 3" pulley design. Add the dual sided closing hooks, and the weight of this block is around 5 lbs, or slightly more, with an overall length of nearly 8" or so.

So, based on the size of this 680# rated pulley, how large is a 4000# block? Or, do you even need one that heavy? Also, where would the weakest link in the winch set-up be? I don't know about the hook rating, but the 3/16" standard aircraft cable 7x19 that comes with the winch is only rated at 840lbs. Also, most winches are mounted using a mounting plate, and U-bolts, or something similar to bolt to the frame. So, what is the weight rating of the bolts, are they able to handle 2000#, let alone the 4000# when doubling?

Realizing that you won't even be able to utilize the full 2000# force of the winch, due to the amperage draw, and the fact that the machine simply cannot put out that much power, you won't really be able to pull 4000# anyway. However, I am concerned that when the atv is tied to an anchor point, and the winch is utilized for pulling fallen timber and logs up out of a canyon, or off a steep hillside, how large of a ****** block should be used for a safe extraction?

Thanks in advance for any info.

 

I've found some of the blocks at Rock climbing stores like REI or Eastern Mountin sports.(Very high ratings) And light.

Also some of the best blocks I've seen came from building, Rigging suply houses. ( The people who clean sky scrapers) They bet their life on them! Very strong and very light, Some are titainium-$

 

Cowboy,

I don't know the best way to do this, but a similar topic came up a few weeks ago at the following thread.

http://forums.atvconnection.com/thre...origpost=49612

In it you will see I bought and modified a sheave block rated at 2,000 lbs from Tractor Supply. When I bought it I was concerned with everything being rated for at least 2,000 lbs, so I thought I was safe. Then I had some of the same questions you have.

The cable on the Warn winch is rated for 2,000 lbs. Now how they determine that rating may be different than the average cable purchased at a hardware store. Most of the cable I have seen says "aircraft type" but states that it is not rated the same as actual aircraft grade cable.

A ****** block rated for 2,000 lbs will most likely withstand at least 2 times that load. For instance, some of the cable will give both breaking strength and working load limit. The WLL is either 1/5th or 1/4th of the breaking strength. A similar rating is applied to the ****** blocks.

I didn't necessarily get the ****** block to be able to pull 4,000 lbs. It was mostly to be able to redirect a pull, or to allow spooling out more cable to get the strongest (lowest layer) pull when the anchor point is relatively close. Even pulling much less than the 2,000 lbs, I have anchored the 4-wheeler from behind to prevent it from skidding forward. I don't think I want to use my 4-wheeler as a 4,000 lb rated "winch link" unless there is a true emergency at hand.

My opinions may be in error due to lack of real-world winching experience, but I have used it to pull other 4-wheelers and my Grizzly out and move some trees. I have not used the ****** block yet, and the most line I have pulled out is 20 feet. I may never need it, but at least I have it if I do.

Yammer_Hummer

 

I believe the 3/16" cable on the Warn atv winches is rated at 4200 pounds. I will check and see for sure. I would get a ****** block larger than needed, as you don't want it to fail and come flying at you. www.princessauto.com has an 8000 pound ****** block for around $10.00. Better to have you winch stall out than have any failures in your rigging.

 

Yeah, the different ratings are what I was wondering about. As for the 4000# pull, you are right, I didn't mean I want to pull 4000lbs, but rather that the ****** block was of sufficient strength to match the winch. I was more worried about a weak link in the rigging, and didn't want to be attached to something, and have the pulley unit break, and come flying back, or cause damage.

Thanks for the advice.

Mike

 

Trx430Ex:
I checked out the REI page. They had some nice little ****** blocks there. Might get a little sh@! about the fancy colors, but the weight ranges from 4500-10,000lbs, and they weigh only grams, not several pounds or more. Kind of costly though. Have to think about it.

TxDoc2:
I looked at the PrincessAuto page. Kind of a hassle getting through to find anything on there. I tried everything from pulleys, pulley blocks, ****** blocks, hooks, etc. and came up with "no match" every time. Finally went to the exact address you sent, and found the one you were talking about. Tried to order it, and they wouldn't accept any U.S. addresses or postal codes and wanted providences for everything. Was not able to place the order, so I had to email them to find out what the deal was. $10 for an 8000# block though, can't beat that!

Thanks guys for the info!

Mike