Best way to tie off to wire rope and determine required force
Best way to tie off to wire rope and determine required force
(OP)
I'm not wondering about terminating the rope, rather I want to attach some assemblies along a wire rope. What's the best way to achieve this? I want to clamp down on the rope imitating a wire rope clip but I can't figure out what gap to remove from the diameter profile of the clamp to achieve the required force when torquing down. How much compression do I need and how much is allowable?
Thanks!
Thanks!





RE: Best way to tie off to wire rope and determine required force
The live end and dead end of the wire rope don't move past one another because of friction along with the enormous forces generated by the clip. If you're putting something other than two pieces of wire rope of the same diameter into the clip, you may run into problems if the other member doesn't generate enough friction in the clip assembly.
What are you trying to attach to the wire rope? There are devices for fastening to a wire rope mid-span other than clips. Depending what you're intending on doing, these items may work better than a clip.
Engineering is not the science behind building. It is the science behind not building.
RE: Best way to tie off to wire rope and determine required force
Do you have any examples of these devices and how to generate and calculate required grip force?
Thank you.
RE: Best way to tie off to wire rope and determine required force
Do your attachments have to be any certain material?
RE: Best way to tie off to wire rope and determine required force
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Best way to tie off to wire rope and determine required force
At 15 lbs, you would probably be ok with wire rope clips, but you may also consider swaging sleeves -- very cheap if you need to do a lot of them and have the equipment to swage the sleeves. Also consider a strain relief sock (pulling sock) -- probably more expensive than a wire rope clip, but will have a convenient loop for you to hang your "pod" onto.
You also may consider using nothing. I don't know what type of "pod" you're dealing with, but if it has a wire rope section to it, you can splice the end of it into the main body of the wire rope you're using.
What kind of well are you doing this in?
Engineering is not the science behind building. It is the science behind not building.
RE: Best way to tie off to wire rope and determine required force
http://www.thecrosbygroup.com/html/default.htm
Click on the orange box top left which says wire rope end fittings
RE: Best way to tie off to wire rope and determine required force
The 15 lb pods are iron/steel assemblies essentially, and they are lowered into petroleum production or observation wells tied off to the wire rope. Total weight hung off the wire rope is ~ 3000 lb so either 1/4" or 3/8" rope, rotation resistant.
I'm wondering about the clamping forces required and how to calculate them. Thanks.
RE: Best way to tie off to wire rope and determine required force
I have attached a copy of the application notes for one of crosbys wire rope clips. The tables show you how much turnback, how many clips and how much torque to apply.
RE: Best way to tie off to wire rope and determine required force
I believe that a line stop would do less damage to your cable, though you might want to look at the mechanical stops that could be easily modified to hold your part.
http://www.lexcocable.com/index.html
Look at line stops:
http://ww
Aluminum Oval Sleeves:
http://www.newcomfg.com/wirerope.htm
Long line snaps;
http://w
RE: Best way to tie off to wire rope and determine required force
Engineering is not the science behind building. It is the science behind not building.