Black Thread Fraying

[George B]

lws380, a burr possibility had occurred to me, but I don't think there is one, as brown and white are going through the machine just fine.

George, I am using 277 on top and in the bobbin. For holsters and belts, should I be using 207 in the bobbin? I am very new to sewing with a machine.

Also, I don't know what the needle size numbers you referenced mean. The packages I have show 23, 24 and 25 as sizes. I am using 25, the largest.

What is a lube pot?

Hello, In saddle school we used #277 on top and #207 on the bottom, some use the same for both. I was told you have to consider the amount of thread that will go into the hole made by the needle. On some belts I will go to #207 on top and #207 on the bobbin, just depends on the thickness of the leather and the width of the belt, but on holsters I always use #277 on top and #207 on the bobbin. Keep in mind I have only been doing this for a couple of years and still learning.

I use a Artisan Toro 4000, the needle sizes are 794s and the difference between the 200 size and 230 size if the diameter of the hole they make, not sure about your sizes.

A lube pot normally mounts on top of the machine and the top thread travels through it before going into the first tension disc. The thread is then lubricated as it passes through and is supposed to relax the stiffness of the black thread.

I would first call the company that makes your stitcher and ask them what they recommend, it should be something they are familiar with.

Hope this helps, George