My machines (domestic and longarm) will take any kind of thread I use. In the domestic machines (Bernina, Pfaff, and vintage Singers) I have used Coats & Clark cotton as well as Glide polyester. In my Juki longarm I have used Kind Tut and Glide. I recently purchased some cones of Superior for the longarm, but haven't tried them yet. I initially encountered some shredding problems with the Glide polyester in my longarm, but after loosening the needle tension, the problems vanished.