Sewing cinch straps

[Tree Reaper]

9 hours ago, RockyAussie said:

if your stitching webbing that you don't use any leather point needle as it will cut and weaken

Now that's beneficial information, thank you.

Let's not assume I'm using these for any critical applications.

My working slings and ropes are the best .

I was given these straps because they didn't have eyes, they could be used for securing brush or small trailer loads of lumber, hold a refrigerator to a hand cart among other things.

[480volt]

What I use (probably what you use, too)

[480volt]

TreeReaper, if you've never looked at his site, Robert VanNatta, retired logger and attorney, has great information on current, retired and antique equipment his family has used on their property in Oregon. Very articulate writer, not sure if he is still active as the site has not been updated in a long time. I particularly liked his discussion of their M123A1C tractor, logging is probably one of the few useful things you can do with a tractor with a gcvw in excess of 100,000 lbs.

http://www.vannattabros.com/index.html

[Tree Reaper]

I have heard of VanNatta through Gerald Beranek (High Climbers and Timber Fallers).

I have webbing slings and use them occasionally but my primary slings are loopie and whoopie made from Tenex.

These straps were purchased new and still are but without eyes for reasons unknown to me.

Without at least one eye they are pretty much useless, even as a tie down.

[Yetibelle]

You should contact Service Thread - they will be able to help you get the correct thread for any heavy project. 

 - You may also need a hammer.  haha love this video

 

 

 

[dikman]

Further evidence of the old adage that there's not much that can't be solved by using a hammer! (Nice machine too).

[Darren Brosowski]

I have several hammers in my sewing machine tool collection.

 

[Tree Reaper]

I've made contact with Service Thread, thanks for the information.

[GPaudler]

I don't think it's a big deal. If I'm not mistaken, automotive seat belts are supposed to be built to withstand loads of 6000-7000lbs., so that's an easy point of reference for all of us. Seat belt webbing is about the dimensions of the webbing you describe and their stitching is there for all to see. Coats specifies Tex 270 or 400 which would be 277, 346 or 415 in our usual thread sizes.

But look at the small number of stitches on a seat belt, I think one could easily match or exceed that strength with a greater area of smaller stitches in smaller thread. Design your slings so that there are no loads trying to peel the eyes apart, over-stitch them, keep an eye on chafe and don't use them in any critical applications and you shouldn't have any problems.

I've designed, sewn and tested lots of climbing harnesses and made plenty of lifting slings and I don't think I've ever seen stitching fail. Be conservative and design with 2X any expected load in mind. Also, if you sew black webbing with white thread or white webbing with black thread it's a lot easier to keep an eye on the condition of the stitching in use.

[VanRhodes]

5 or 6-cord, nylon thread, equal to or greather than A-A-59826 Type 2 Class B. A-A-59826 supersede the older VT-295E spec. Pay close attention to the way your sling will be loaded with regard to the splits or joints for the eye's. Please have a look at the linked PDF for some interesting technical reading. 

http://www.dtic.mil/dtic/tr/fulltext/u2/110406.pdf