Forums: Climbing Information: The Lab: Re: [majid_sabet] Solutions for pull testing ropes and slings?: Edit Log




USnavy


Mar 6, 2012, 9:27 PM

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Registered: Nov 5, 2007
Posts: 2661

Re: [majid_sabet] Solutions for pull testing ropes and slings?
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majid_sabet wrote:
USnavy wrote:
I have a pull back ram which works great to pull test metal gear. However the 6" stroke lacks the distance to pull test any soft goods. Does anyone have an idea of a pull back ram or similar device with a much longer stroke? I have seen people use winches and the sort, but I would rather stick with something a bit safer and more static.


its called PULLEY system but you probably do not know how to use it to get twice as much distance with 6"
Homeboy Majid Idoit, I cannot test soft goods like a rope or a piece of webbing with ONLY a 12" stroke, I need MORE travel distance than that. Beyond a 1:2, a 10T pull back ram is USELESS. It does not have the power or stroke to drive a pulley system any more COMPLEX than that. Once you get to a 1:3 and above, you have TOO much crap in the system, its going to stretch and eat up your travel distance, even if you are using steel cable. Also, with all the FRICTION from the turns, a 1:3 might give me at MOST 2000 lbs. on the load piece which wont cut it. Those 10T rams are NOT actually 10T, not with a hand pump anyway. The most I can get out of a hand pump and pull back ram is about 8000 lbs, and thats by STANDING on the handle.


(This post was edited by USnavy on Mar 6, 2012, 9:32 PM)



Edit Log:
Post edited by USnavy () on Mar 6, 2012, 9:29 PM
Post edited by USnavy () on Mar 6, 2012, 9:30 PM
Post edited by USnavy () on Mar 6, 2012, 9:30 PM
Post edited by USnavy () on Mar 6, 2012, 9:32 PM


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