GL-type roller chain coupling AUTOCAD renderings (GB6069-2002 instead of GB6069-86) Features: The chain coupling uses a common chain and meshes with two parallel sprockets with the same number of teeth at the same time. Chain couplings of different structural types The main difference between the shafts is the use of different chains, the common ones are double-row roller chain couplings, single-row roller chain couplings, toothed chain couplings, nylon chain couplings, etc.