Author Topic: Big fat pulley question  (Read 1701 times)

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Offline Garbonzo

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Big fat pulley question
« on: October 09, 2006, 12:28:06 am »
Anyone got experience using the funky looking hollowshaft pulley Yates is selling?

bottom of page on:
http://www.yatesgear.com/rescue/hardware/pulleys/index.htm

Found the weight listed elsewhere at only 9 ounces, which is the same weight at the petzl pro traxion, but with a big fat 3.5" sheave instead of the Petzl's 1.5".  It's way under the 27 ounces listed for CMI's 4" pulley, and the 21.6 ounces for the CMI 3".  Best of both world's?

Obviously still need a jug to use for hauling, but rated at 10,000 lbs it will rid my brain of the heabie jeabies I got from that supertopo thread on all those busted traxion's.

Thoughts?

Offline mungeclimber

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Big fat pulley question
« Reply #1 on: October 09, 2006, 12:55:19 am »
so it seems about the size of the CMI pulleys, just supposed to be lighter.

nice

haven't seen in person obviously, isn't Yates in Redding? maybe there is a shop up there that has the gear in stock and give you a first hand impression. hrm

Offline euroford

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Big fat pulley question
« Reply #2 on: October 11, 2006, 07:57:28 am »
wow, i'm digging that thing.  not a bad price either.

on another note, those small yates 'wall pulleys' made by DMM are very very nice.  perfect for rigging up 3-1's ect.

Offline Garbonzo

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Big fat pulley question
« Reply #3 on: October 11, 2006, 11:21:33 am »
I ordered one up for grins and giggles.  Probably won't be able to really try it out until springtime though.

Offline passthepitonspete

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Big fat pulley question
« Reply #4 on: October 14, 2006, 02:41:41 pm »
Why not just use a Kong Block-Roll?  [or is it a Roll-Block?]  Superb all-in-one hauling device.  Yes, the bigger pulley will permit easy hauling in theory however you will have to have a near-perfect setup on your inverted ascender to avoid the slippage you don't get with the Kong.  

I can get you one if you like, just email me.  passthepitonspete at that hot place.
Dr. Piton says, "There is always a Better Way!"

Offline Garbonzo

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Big fat pulley question
« Reply #5 on: October 15, 2006, 11:50:08 pm »
Block roll is just one big beast.  Never was really interested in one.  Maybe good for use in bar fights too.  In general I'm finding myself viewing the Pete Way of doing things as an inspiration to figure out the Other Way.  We'll see how it works out.

In particular your claims as to the absolute imperitiveness of the frost draw in your 2:1 ratchet.  Elsewhere in the same system are two small diameter non-ball bearing pulleys, and a big long section of stretchy 6 or 7 mm static line.  About like spending your money on hubcap polish instead of a tune up.  But whatever.

Offline caribouman

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Big fat pulley question
« Reply #6 on: October 16, 2006, 09:40:35 pm »
But I like polished hubcaps...

I read a rigging manual a few months ago - If I remember correctly, the suggested ratio is:  Sheave Radius >/= 3xRope Diameter.  What I do remeber is crunching the numbers for an 11mm rope and deciding that I would never again use anything < a 3" pulley.  A lot of what this industrial rigging manual was concerned with wasn't the ease /lack of ease of hauling,  but the damage caused to the rope due to running it over too small a radius.  It's thoughts like that what cause unrest.
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