I think a shorter needle makes it less likely, that the needle bend or break when you are working with it. So if short length is no problem for you, then a shorter needle is right for you. In your Picture, you have got a length of 30 mm from the nut to the eye. For one of my needles for the...
Hi Jimmycrackcorn . The reason why I did not selected the 135x17 type needle is, that it is rather short. It is only 39 mm from butt to eye. The alternative is about 9 mm longer.
/Viggo
I think these 3 types of needles may work well with the Speedy Stitcher for use on rope or fabric. I have tried to find the longest needles and with no sharp point on needle.
160/23 size needle with regular point, Ø2.0mm shank and 48,5 mm from butt to eye:
Sold from...
The Shank (not shaft) diameter of a 7x3 needle is 2.5 mm. The Speedy Stitcher is designed for 2.0 mm in diameter. That is why moss needs to grind the shank part of this needle type.
No problem with inches - I have got a calculator :). Please look here for a reference to naming of some needle parts: https://en.wikipedia.org/wiki/Sewing_machine_needle
You may find small variations in naming - and many needle types do not have the flat side on the shank. I have got a...
Can someone measure the length of the shank part of the needle to the Speedy Stitcher? I like to find an applicable needle from a needle manufacturer with right shank diameter.
I would not consider lubrication here a change of test object. Lubrication can in my oppinion not add any strength to the rope anyway.
Another way to see it is, that the aim of terminating the rope with the drum is to make this termination as strong as possible. The real test object is the...
As you may now, I have not been active on this site for two years. I just now looked at all your pull test videos on your youtube channal. Very interesting - and thank you for sharing!
Did you consider to lubricate the drum? I suppose possible damaging stress on the mantel might be avoided this...
I am not sure, that bending will perform either. But I should like to see have some verification. I take your points.
Try to look at this test video by Richard from 1.25 in video:
What you see is machine stitched eyes with long seams where the stiches brake near the throad - just as the...
Ouch! Hopefully you will make a good recovery from this. I might easily make same mistake.
To hold against the receiving end of the needle I often use a block of Cork like this (Price 3$): https://www.skindhuset.dk/produkter/58-almindelig-laedervaerktoej/267-kork-105x60x25mm/
I think a leather...
Sorry Yoyoman. I did not read your ealier post carefully - I did now twice. Measuring the "right" breaking strength of a kernmantel rope seems difficult. I suppose that standards for ropes makes some directions to an "agreed" test method. But for now I have not read them. We cannot suppose, that...
yoyoman - I agree that a drum used for termination of rope should be the best way to keep high strength. With my small Things for test I have used the same method to measure breaking strength of sewing thread. Then the size of the drum becomes a bolt of about ½ inch.
theatertech87 Thanks for sharing your plans for testing the sewn ropes and eyes. I hope you will share some of the test results with us.
I got a comment regarding the eye stitching. Evans Starzinger did a similar eye test, that he commended here - see post #861...
Thanks for this video on the Speedy Stitcher. Actually I build a holding Tool similar to the one seen in video - its quite handy to have that - Photo:
I did also look at the Leather workers forum for information on this Speedy Stitcher or similar awls. The funny thing is, that these folks don't...
You are quite right, Richard. And on this Photo you can see how Sharp the leather type points on the needles are. These two needles are new and not grinded for use on rope nor fabrics. The best would be to find right type of needles and avoid grinding.
Thank you for sharing these videos, Richard. I think video documentation of these pull tests provides valuable information regarding the possible failure reason.
In your tests, you did use sewing an eye on the other end of the spliced test objects. Sometimes the stitching end failed before the...
I do not have a complete answer to this question. but this information can get you some of the way. I noticed somewhere else, that the shank diameter of the needles to the Speedy Stitcher is near 2.0 mm. I suppose any needle shank diameter in the range 1.95 to 2.05 mm might fit the stitcher. On...
I just want to be sure, that you know that Vectran are susceptible to UV-light.
I think we normally seen results of break tests on sewn eyes in polyester or nylon ropes. These materials have much more elongation than Vectran and Dyneema. With elongation and a straight sewn seam, the forces will...
Thanks for the results. I expect all to break where the stitching started. So number 9 is special. Do you or anybody else have an idea on what shall be done to prevent this kind of failure?
I should like to know the expected breaking strength of the rope involved.
This link documenting pull tests. It has been referenced twice in this forum before 2-3 years ago. So I just like to repeat this link here:
http://www.bethandevans.com/load.htm
You will find two tests with stitched eyes about 1/3 and 1/2 into the text. The ropes were connected with the use of...