NL nylon gear coupling, also known as NL type drum gear coupling, is suitable for flexible transmission between shafts and allows large axial, radial and angular displacements. The drum gear coupling is a rigid-flexible coupling with the ability to compensate for radial, axial and angular axis deviations. It has the advantages of simple structure, convenient maintenance, easy disassembly and assembly, low noise, small transmission efficiency loss and long service life.