This work aimed to prepare polyamide 6.6 nanofibers by melt spinning. For this, a low viscosity polyamide (~ 92 ml / g) was used. To obtain fibers with submicron and / or nanometer diameters and low variability diameter, some important changes were made to the equipment and processing conditions. The prepared nanofibers were characterized by scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). With the modifications made in this study, the smallest average diameter obtained for the fibers was 0.987 ± 0.374 µm against fibers with an average diameter of 3.390 ± 3.819 µm, obtained with the standard commercial equipment. This represents a 73% drop in fiber diameter and a significant reduction in dimensional variability, which is a major challenge when employing this technique. Thus, the obtained results represent an important advance for the viability of the industrial production of fused polyamide 6.6 nanofibers.