When I first started out with leather work, I was taught to thread the needles like this photo below.

It's the same method taught by Al Stohlman in his book "The ART of HAND SEWING Leather"
It was the only method I knew so it was the only method I used. It gave me endless grief! It just doesn't hold the thread to the needle securely. If you pulled hard enough, you can and will pull the thread off the needle. In fact that is how I remove the thread from the needle after I am done.
But thanks to Ron Edward in his "HOMEMADE LEATHERWORKING TOOLS", I have found a better way to do it. It's a little more complicated but it works.

Now, I never have any problem with the thread pulling away from the needle. You can try pulling as hard as you possibly can, but you will not get the thread off short of cutting it.
singteck

It's the same method taught by Al Stohlman in his book "The ART of HAND SEWING Leather"
It was the only method I knew so it was the only method I used. It gave me endless grief! It just doesn't hold the thread to the needle securely. If you pulled hard enough, you can and will pull the thread off the needle. In fact that is how I remove the thread from the needle after I am done.
But thanks to Ron Edward in his "HOMEMADE LEATHERWORKING TOOLS", I have found a better way to do it. It's a little more complicated but it works.

Now, I never have any problem with the thread pulling away from the needle. You can try pulling as hard as you possibly can, but you will not get the thread off short of cutting it.
singteck