****** block/pulley for 2" diameter rope?

[ATC]

Has anyone seen a pulley or ****** block for a 2" diameter rope? My friend and I like to use a rope for directing trees when felling them. Often, the trees need to be redirected, and pulled with a skid steer or truck. I have a project at home coming up where I will need to drop 6-7 large trees...many of them close to my garage and shed.
There are lots of ****** blocks for wire rope, but nothing I can find for rope larger than 1" or 1-1/4", and only rated for 2,000#. I've checked Amazon, Ebay, McMaster-Carr, MSC, etc...

Just seeing what's out there before I make something with a 2" roller die from a HF tubing roller.
Worst case, I do have a couple hundred feet of wire rope (winch cable) I can use.

 

[cvairwerks]

Stuff is out there, but you are talking about having to go to 100 ton capacity units to get the sheave size to get a 2" line through them. Don't think you can justify spending 15-20K$ on a single block. You could get away with using a pair of shackles if you don't have to deflect more than about 15-20 degrees.

 

[shawhite]

Electrician and telco sheaves should work. 2in rope is rather large but we run 2400pr cables thru these with no problem so I’m pretty sure it will handle a 2in rope.

SHS12-4, HOOK SHEAVE, 12 INCH, 4000LB | Southwire

www.southwire.com

 

[GeoBruin]

Why are you using 2" rope? Just because you have it around? That's seems insanely overkill for the task and really inconvenient to work with. You could rip the tree straight out of the ground with a crane using less than a 2" diameter rope. Also, ****** blocks for vehicle recovery are commonly rated at 20,000 lb and they're available everywhere, including your local harbor freight.

https://www.harborfreight.com/******-block-61673.html

 

[Kscardsfan]

Your checking account is gonna take a bit of a hit for that purchase

 

[cvairwerks]

Electrician and telco sheaves should work. 2in rope is rather large but we run 2400pr cables thru these with no problem so I’m pretty sure it will handle a 2in rope.

2" manila rope is rated at 23 tons.....2" synthetic is rated over 175 tons......

 

[lardy1]

Marine supply. It's going to be pricey for a block that size. There are lines much smaller that can handle the task. Plasma line is kickass but really expensive. Incredibly light and strong.

 

[KnurledNut]

What are you dropping? General Shermans?
If you need a rope that big, you’re doing something wrong.

 

[shawhite]

2" manila rope is rated at 23 tons.....2" synthetic is rated over 175 tons......

Sure the rope will be stronger than the block but it doesn’t sound like the OP will need the full strength of the rope to fell a couple trees

 

[corn chip]

crosby mckissick has a full range of pulley blocks but im not sure they go to 2" rope. even if they did they would be extremely heavy and cost many thousand of dollars

 

[cvairwerks]

Crosby maxes out at 1 1/4" wire rope until you get into the really heavy stuff. A ****** block that run 1 1/4" wire is over 15K$.

 

[bob15]

Be cheaper and safer to rent a bucket boom and cut the trees down in pieces.

Two inch rope is overkill.

 

[shawhite]

2" manila rope is rated at 23 tons.....2" synthetic is rated over 175 tons......

Might want to recheck your specs. Safe work load on 2in Manila rope is 2300lbs breaking strength is 27000lbs any knot, braid or bend will severely reduce this number.

 

[theoldwizard1]

Why are you using 2" rope? Just because you have it around? That's seems insanely overkill for the task and really inconvenient to work with.

Concur !

1/2" double braided nylon or 3/4" twisted nylon is more than adequate. Minimum breaking strength is about 10 times the working load.

Stay away from any rope that use more than one fiber type (like nylon and polyester). They will stretch differently and one will fail before the other !!

 

[corn chip]

Crosby maxes out at 1 1/4" wire rope until you get into the really heavy stuff. A ****** block that run 1 1/4" wire is over 15K$.

yes i know highend ****** blocks of any style arent cheap. the one i bought for 4x4 winching was nearly $450

 

[tarbellb]

What am i missing, when winch line for vehicles is rated for 20k and 3/8" diameter?

 

[ATC]

Thinking on it more, the rope might be 1.5"

Why are you using 2" rope? Just because you have it around? That's seems insanely overkill for the task and really inconvenient to work with. You could rip the tree straight out of the ground with a crane using less than a 2" diameter rope. Also, ****** blocks for vehicle recovery are commonly rated at 20,000 lb and they're available everywhere, including your local harbor freight.

https://www.harborfreight.com/******-block-61673.html

Yes, he's had the rope for a long time, and has used it for dropping trees for a couple decades. It's not inconvenient...actually much easier to use than a steel cable. But the only redirect he has is a 80+ year old pulley like you'd find in the rafters of a barn....made of sheetmetal, a wheel, and a 3/8" bolt through it. The rope barely, barely fits, and I just feel uncomfortable using it for fear it will cut the rope or just flat-out break.
I have several of the ****** blocks you pictured, but I don't have enough cable for the length I need. His rope is 180' long.

Stuff is out there, but you are talking about having to go to 100 ton capacity units to get the sheave size to get a 2" line through them. Don't think you can justify spending 15-20K$ on a single block. You could get away with using a pair of shackles if you don't have to deflect more than about 15-20 degrees.

That's what I was afraid of. Like Bruin mentioned...there are 20k ****** blocks for cable I've bought for $20...not sure why they can't make a bigger one for a reasonable price.

 

[ATC]

Concur !

1/2" double braided nylon or 3/4" twisted nylon is more than adequate. Minimum breaking strength is about 10 times the working load.

Stay away from any rope that use more than one fiber type (like nylon and polyester). They will stretch differently and one will fail before the other !!

If something ever goes not-to-plan, I want my 8,000lb skid steer to make it go where I want, or for the tree to pull me....not for whatever equipment I'm using to break.

What am i missing, when winch line for vehicles is rated for 20k and 3/8" diameter?

I need a lot of it. Sure, I could spend $200+ on a small spool of cable, clamps, thimbles, hooks and put it all together.
Or, I could just buy a pulley and use the rope I have available. I can throw the rope under one arm and carry it around...toss it in the back seat of my truck....shorten it to whatever length I need with knots....can't do that with 200' of steel cable.

 

[corn chip]

it seems logical to make use of the equipment you already have on hand but i think the civilian world has no need for a ****** block of the magnitude you want. thats why you cant find one im sure.
if your not wanting to spend much money ,amazon likely has **** china ****** blocks and rope that may work for one time use. your not doing over head lifting and nobodys life would be on the line so cheap amazon **** should do

 

[tarbellb]

If something ever goes not-to-plan, I want my 8,000lb skid steer to make it go where I want, or for the tree to pull me....not for whatever equipment I'm using to break.




I need a lot of it. Sure, I could spend $200+ on a small spool of cable, clamps, thimbles, hooks and put it all together.
Or, I could just buy a pulley and use the rope I have available. I can throw the rope under one arm and carry it around...toss it in the back seat of my truck....shorten it to whatever length I need with knots....can't do that with 200' of steel cable.

Ahh. thats what I am missing

YOU ALREADY HAVE 2" ROPE..... from your tug boat days i presume

 

[signcrafter]

I can throw the rope under one arm and carry it around...toss it in the back seat of my truck....shorten it to whatever length I need with knots....can't do that with 200' of steel cable.

I have a hard time believing you can throw 180 feet of 1.5" rope under one hand and carry it around.

If it were me I would just buy a length of rope made for falling trees. Think I bought 150' of 5/8" or something from wespur or one of the other tree trimming suppliers. They have all kinds with different ratings, made specifically for dropping trees. I also bought a length of climbing rope and harness, although i havent tried that out yet. Probably end up costing the same price for a new rope and pulley as just a pulley for your big rope. And a 3/4" rope of the right kind may even be stronger then your 1n5" rope that is decades old.

 

[AA/FC]

I can't imagine what a ****** block for 2" diameter line would weigh! lol. It doesn't sound very user friendly. lol

 

[corn chip]

crosby lists their 1 1/4 pulley blocks at 208-575lb depending what sheav it has. without a forklift you arent moving it far

 

[sparky 1971]

I have one of these. It's supposedly 4000# rated, but I'm willing to bet I've more stress than that on mine at least once. The sheave is 5" wide so fitting the rope on won't be a problem.

Greenlee 651 12" Hook-Type Sheave, 4000 lbs Capacity

Greenlee 651 12" Hook-Type Sheave offers a 4000 lbs capacity with strong welded steel frames and self-lubricating bearings for efficient cable pulling.

www.electricianshop.com

 

[KnurledNut]

Crosby 702315 is a ****** block designed for 1.5” manila rope with a 8t WLL.
It wont be cheap.
https://www.thecrosbygroup.com/prod...-385-wood-shell-******-block-for-manila-rope/
https://paducahrigging.com/product/western-390-steel-shell-******-block-for-manila-rope/

 

[Dig Doug]

I think I would buy a Jeep style ****** block and get a section if new Rope - amsteel blue!

i have 1/4 rope on my can am 8,600 lb and 5/16 13,700 lb on both my jeeps and they are bad *** and TUFF

If you need it to be longer you can have a loop made or tie loop on one end to get your MUCH thicker rope tied onto it

for about $500 you can buy a winch w/ the rope already on it! The winch will get a tree fall any direction you want!



****** block is rated 3/8 @ 20,000lbs

 

[corn chip]

I have one of these. It's supposedly 4000# rated, but I'm willing to bet I've more stress than that on mine at least once. The sheave is 5" wide so fitting the rope on won't be a problem.

Greenlee 651 12" Hook-Type Sheave, 4000 lbs Capacity

Greenlee 651 12" Hook-Type Sheave offers a 4000 lbs capacity with strong welded steel frames and self-lubricating bearings for efficient cable pulling.

www.electricianshop.com

is that for pulling wires through conduit ?

 

[mike93lx]

I feel like there is a measurement error here. We are already down from 2" to 1.5".

You aren't casually carrying around 200' of either size. So let's see a pic with a tape measure on it

Either way, at "decades" old, it is well past its useful and safe life. Time to retire it

 

[lardy1]

I'm not going to go back and read the entire thread again but I don't remember what kind of rope you mentioned the 2" one is. You did mention that it's seversl years old and that in itself should be a major concern for anyone using it in any way that could bring about damage. I am a retired Merchant Marine. I spent many years learning marlinspike seamanship and practicing it. Any experienced linehandler that isn't exercising proper safety is putting themselves, others and their property at risk.

Rope and line has a lifespan. Manila rope has one of the shortest lifespans and there's a reason for that. A little bit of research combined with some common sense should be applied.

There's so much uninformed opinion in this thread that about all this post is is a warning to do your homework. It may save a life.

 

[sparky 1971]

is that for pulling wires through conduit ?

Yes

 

[cannuck]

I can tell the OP that the FIRST thing you should do is measure the actual rope diameter and the second thing you may want to do is determine what it is made from and what condition it is in. As others have mentioned: it may not be anywhere near as strong as you think. The wire pulling bocks are probably as close as you will get, but no where near strong enough to drag an 8k loader on dry pavement. Another thing I can tell you from painful experience is if you are not familiar with rigging the cost of blocks, slings, NON Chinese shackles and hooks will come as an extremely rude shock to you. If I needed such a block as you describe I would just buy a laser or plasma cut aluminum disc 1/2" greater than rope diameter and min recommended OD for bend radius of the ACTUAL rope material and nominal diameter, chuck it up the the lathe and make it. Still a $300++ proposition when all would be said and done.

 

[yatg]

I use 1/2" wire rope for tree guidance, and a 10 ton ****** block from Amazon is about $30.

If you attach one rope to a tree and are pulling forward, the tree will fall in that general direction. There's still a pretty big arc, about 80 degrees each way off of centerline, that it could fall if things don't go as planned. Trees are not perfectly straight and balanced. More ropes from different angles allows you to fine tune the fall. Its geometry.

 

[ATC]

Thanks for all the help and the criticism. Plans have changed, so I am leaving the two large oaks I was nervous about, and taking out two smaller ones that are not leaning towards a building (though still close to one). I'll use my cable. I have (3) 80-foot sections. If my buddy brings the rope and pulley, I'll try to remember to grab a pic.

I still might build my own pulley and donate it to the cause...

 

[ATC]

I figured I'd update this with my solution. Found a CM long reach shackle that had similar dimensions to the roller I wanted to use. The roller is from the HF tubing roller kit. Heavy cast iron with sealed bearings on each side.
I did have to grind on the inside of the shackle some to make it clear. Outside dimensions on the roller are 2.45" and inside dimensions on the shackle is 2.25"

 

[shawhite]

You will cut the ropes strength significantly by going around a sheave that small.

 

[ATC]

You will cut the ropes strength significantly by going around a sheave that small.

I'm not doubting it. It's roughly the same diameter as what we are currently using. Usually the angle of the pull is 45-90 degrees.