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| Chopperone Member Since: 13 Nov 2016 Location: Derbyshire Posts: 396  
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Hi
Is anyone familiar with the use of Rope or Cable socks. I need to pull a 7mm Galvanised cable 100ft up a Tower and then over two pulleys back down to the ground. The last time l tried this the sock l had failed to grip the rope & the rope had to be replaced by climbing the Tower which was a real pain. The sock l used was only about a foot long. I need to greatly improve the chances of success- any thoughts Thanks Guy May your life be like toilet paper ; long & useful. Last edited by Chopperone on 5th Jan 2021 11:07pm. Edited 1 time in total |
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5th Jan 2021 11:02pm |
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| Chopperone Member Since: 13 Nov 2016 Location: Derbyshire Posts: 396
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Hi
I think you are misunderstanding what I am trying to do. I am using the existing cable to pull the new cable into place. I have a 100ft Tower; the cable goes up the outside of the tower then over 2 x pulleys each time making a 90 deg turn & back down to the ground & then onto my winch. The winch end of the cable has the black tape which goes into the winch drum & held in place by two grub screws - a number of turns of the cable over the drum hold it onto the drum. The only way l can pull the new cable into place is by joining the old cable to the new one end to end I.e by using a rope sock. May your life be like toilet paper ; long & useful. |
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5th Jan 2021 11:16pm |
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| Matt110 Member Since: 29 Jun 2014 Location: UK Posts: 673
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I did get what you meant I think.
The sock you're meaning is just a sleeve that pulls tight once you put it over the cable and pull on the end, like a snare as the diameter of the sock decreases as you apply force and thus it grabs the cable? Or am I misunderstanding. |
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5th Jan 2021 11:32pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 7695 
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Splice the two wire cables together, cut it out after? Cheers
James 110 XS Utility 130 Puma Station wagon/camper (in the making) 90 Puma Hardtop |
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6th Jan 2021 10:13am |
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| stew 46 Member Since: 26 Jan 2012 Location: Wadebridge ,cornwall . Posts: 561  
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Wire splice as you say jst , and you spice wire with the lay not against the as you do with rope , well that’s what we were taught 40 odd years ago at Falmouth nautical collage and my time at sea in the merchant navy
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6th Jan 2021 10:22am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16892 
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How good is your wire splicing skill?
Splice the two ends together with a traditional wire splice (similar to a long splice in natural fibre). When in place, cut the splice off and reterminate the rope as required. Or find a rope sock that works... |
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6th Jan 2021 11:16am |
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| Chopperone Member Since: 13 Nov 2016 Location: Derbyshire Posts: 396
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Thanks for all the suggestions so far !
I have tried splicing the cable before....& therefore needs to be fairly flexible to make the two turns. The problem exists in that the rope/cable goes over two pulleys at the top. Each pulley is approx 6" in diameter. The first pulley takes the cable though 90 deg. It then travels approx 12-18" before it gets to the next pulley & then goes through another 90 deg & down the inside of the tower.  Click image to enlarge The picture shows the pulley on the outside of the Tower.When this picture was taken the INSIDE pulley had failed & the wire rope was acting as a wire saw & you can see how it has cut a groove in the Tower.The inner pulley has been replaced with one the same as the outside pulley. The material that was used was a Ballistic type of nylon used for Crane Sheaves/pulleys. Unfortunately I could not make either pulley bigger OR fit just one big pulley ( think Winding Wheel on a coal mine) over which the cable would travel. The load on the cable is approx. 400kgs May your life be like toilet paper ; long & useful. |
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6th Jan 2021 1:14pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16892
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An idea you could consider (and I don't see why it wouldn't work, though I haven't tried it) would be to get a length of the modern Dyneema-style rope (other makes are available) as currently fashionable for winches, and which is so easy to splice that a child could do it, and use that in place of the "sock". You could easily take a substantial number of tucks of the tail of the old wire and the head of the new, and provided that you maintained enough tension to keep these firmly closed the friction should be sufficient to draw the new wire through. Perhaps.....
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6th Jan 2021 1:25pm |
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| stew 46 Member Since: 26 Jan 2012 Location: Wadebridge ,cornwall . Posts: 561
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Is your 7mm wire 3,4 or5 stranded ?
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6th Jan 2021 1:32pm |
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| Sulisuli Member Since: 30 Oct 2016 Location: South west Posts: 4789 
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This website maybe of some use to you
https://www.powerandcables.com/cable-socks/ 2015 HT XS 90 2008 SVX 90 2000 XS TD5 90 |
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6th Jan 2021 2:27pm |
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| Supacat Member Since: 16 Oct 2012 Location: West Yorkshire Posts: 11018 
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Was the sock appropriately sized for the cable, or maybe the cable is at the very lower end of the sock spec? You could increase size and maybe friction by wrapping the end of the cable with tape before using the sock. If this doesn't do the job then an end stop
https://www.gsproducts.co.uk/bzp-end-stopper/ |
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6th Jan 2021 2:34pm |
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5745 
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I am being nosey, is this a tower for antennas? Does the winch raise/lower the telescopic sections? 1999 Defender TD5 110
Regards John M0VAZ Econet Station 48 no clock |
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6th Jan 2021 2:35pm |
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| Chopperone Member Since: 13 Nov 2016 Location: Derbyshire Posts: 396
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7 mm dia
7x 19 construction galvd 65 mtrs long f & T one end I own a Shooting ground ; The cable is used to raise my clay traps up/down my Tower for filling /altering height. I have a 30m lift to the top. Previously I have tried an Open ended sock - failed but then one of the top pulleys had failed. Also tried splicing & taping with gaffer tape - that also failed - not sure what caused that to fail but I assume it was early on in the top pulley failing. The idea of splicing in a section of dynamic rope appeals BUT it means losing the F&T end which fits into the winch drum.I need to research this bit . I am looking for a solution that means I can readily change the cable ( which I do annually) without issue. May your life be like toilet paper ; long & useful. |
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6th Jan 2021 5:27pm |
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| Simon Audi Member Since: 19 Nov 2020 Location: Newport Posts: 544
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How about a length of heat shrink?
You can also buy adhesive lined heat shrink to give extra grip? Say 2 M long - 1 M each rope Then maybe another over the top to give extra strength? |
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6th Jan 2021 5:37pm |
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