ISC Compact Rigging Pulley

[seanlarkin]

Hey guys,

Just a quick heads up that we just got a large shipment in of ISC's new Compact Rigging Pulley. Judging by how fast we sold out of these at TCIA Expo, I figured some folks have probably been waiting on them to arrive.

If you've not seen these yet, check out the link. They're small but strong, like a body-building elf.

http://www.sherrilltree.com/ISC-Compact-Rigging-Pulley

-Sean

 

[TheJollyLogger]

I couldn't get the link to work.

 

[seanlarkin]

I couldn't get the link to work.

Thank you!! I believe I've fixed it. Sorry about that!

 

[TheJollyLogger]

Yup, works now. Nice piece of gear.

 

[Magnum783]

Sean what size rope does it
Handle?

 

[treebilly]

I believe it's meant for 1/2"

 

[seanlarkin]

Sean what size rope does it
Handle?

It's meant for 1/2 inch lines, as treebilly pointed out.

 

[Aldegar]

I want one, looks perfect for negative blocking.

 

[Magnum783]

So 1/2" sling too. Will you be offering this with a loopie installed. As you do the rock erotica micro blocks?

 

[seanlarkin]

So 1/2" sling too. Will you be offering this with a loopie installed. As you do the rock erotica micro blocks?

The sling sheave takes up to 5/8". We weren't planning to offer a combo quite yet. Going to see if we notice a pattern of any specific sling being purchased along with the block.

-Sean

 

[squad143]

I purchased one at TCIA and have used it numerous times since.
It's light and compact. Made my own 5/8 sling. Hardly noticeable on my harness.
It's my go to block for limbs and most tops before switching to a larger block for the bigger stuff.

 

[Aldegar]

Looks like it wouldn't be too difficult to attach a loopie sling to.

 

[DLCRL]

Hey guys,

Just a quick heads up that we just got a large shipment in of ISC's new Compact Rigging Pulley. Judging by how fast we sold out of these at TCIA Expo, I figured some folks have probably been waiting on them to arrive.

If you've not seen these yet, check out the link. They're small but strong, like a body-building elf.

http://www.sherrilltree.com/ISC-Compact-Rigging-Pulley

-Sean

It looks great but if it's so strong why does it only handle a 1/2 inch line, I'd buy one but it won't handle 5 /8 or 9/16 I like using a rope that handles 10,000 plus.

 

[squad143]

It looks great but if it's so strong why does it only handle a 1/2 inch line, I'd buy one but it won't handle 5 /8 or 9/16 I like using a rope that handles 10,000 plus.

It has to be that strong. Blocks usually see double the force that the line load is.
If I'm running 1/2" super-braid (8,700 tensile) or 1/2" stable braid (10,400 tensile), I want to know that the block will hold what the rope can.
For the block to handle the larger ropes, it will require a larger sheave (to maintain a proper 4:1 bend radius) and stronger side plates to support the 13-16,000 mbs of the 9/16 & 5/8 ropes.
Thus making the block that much larger, and therefore defeating the small size benefits of this useful block.

 

[DLCRL]

It has to be that strong. Blocks usually see double the force that the line load is.
If I'm running 1/2" super-braid (8,700 tensile) or 1/2" stable braid (10,400 tensile), I want to know that the block will hold what the rope can.
For the block to handle the larger ropes, it will require a larger sheave (to maintain a proper 4:1 bend radius) and stronger side plates to support the 13-16,000 mbs of the 9/16 & 5/8 ropes.
Thus making the block that much larger, and therefore defeating the small size benefits of this useful block.

Thank you, it's not too much better than my 1/2 inch 16,000 lbs. Stainless, for more than double unfortunately.

 

[squad143]

Thank you, it's not too much better than my 1/2 inch 16,000 lbs. Stainless, for more than double unfortunately.

I'll have to assume that you are using a 1/2 pulley as I have yet to see a stainless steel block that would be priced around $65.
Although arborist blocks and pulleys can be rated for the same weight, they are designed for a different style of use.
Blocks are designed for shock loading. Pulleys are designed to be used in pretensioned lines. Shock loading a pulley can damage the cheek plates.
This is not my picture, however I have seen similar damage occur in a pulley being used in the place of a block.

Here is another one:

 

[DLCRL]

Yes, I've a couple of blocks, I use the stainless for smaller things, I never shock load w/more than the safe working load of 1,600 probably more like a few hundred. I typically use a loopie w/a steel Caribbeaner 25kN I think, doesn't matter loopie is a thousand. You know sometimes you just don't want to haul a block up, you can easily climb up the tree w/a loopie and stainless.

 

[DLCRL]

I'll have to assume that you are using a 1/2 pulley as I have yet to see a stainless steel block that would be priced around $65.
Although arborist blocks and pulleys can be rated for the same weight, they are designed for a different style of use.
Blocks are designed for shock loading. Pulleys are designed to be used in pretensioned lines. Shock loading a pulley can damage the cheek plates.
This is not my picture, however I have seen similar damage occur in a pulley being used in the place of a block.
View attachment 392343
Here is another one:
View attachment 392356

Second photo is aluminum, 7 maybe 8k

 

[DLCRL]

A spring loaded pin would be a nice improvement, my favourite one is 15 years old shows no signs of wearing out and is good for an obscene amount of weight. Just a little chunky to use if you need to rope the top off a tree "18 in diameter at the base.

 

[squad143]

Yes the second pic is aluminum. Just used that picture to show the results of shock loading a pulley.

Like mentioned earlier, one on the benefits of the small ISC block is it's light compact size. I can keep it on my saddle and not notice it.

I'm always acquiring and trying new gear. Hope to try out some x-rings next.