Help picking needles

[Rcc619]

Hi guys, 

 

I have search for my answer but have had no luck so I will throw it out there.

I have a Cobra 4 and I am sewing with bonded nylon with 277 top and 207 bottom. I am using size 25 diamond tip needles because they came with my machine. Seems to work ok but I do have some

dropped stiches where the thread seems to get caught up on the leather. Could it be that I am using the wrong size needles?

 

 

[kgg]

17 hours ago, Rcc619 said:

Seems to work ok but I do have some

dropped stiches where the thread seems to get caught up on the leather. Could it be that I am using the wrong size needles?

I think you should move up a needle size as the top thread loop isn't being properly formed and the hook is not catching it. Sometimes you need to move up a size or two depending on the how thick / tough / sticky the material is.

A good chart for thread size to needle size:  https://www.tolindsewmach.com/thread-chart.html

I do have a question why are you not using the same size of thread in the bobbin as the top thread??

kgg

[Northmount]

@Rcc619 moved your post to leather sewing machines