Elastic dowel pin coupling is the use of a number of non-metallic materials of the dowel pin, placed in two and a half coupling between inner surface and outer ring the involution of the hole, achieved by column pin transfer torque half coupling, the coupling has the following features:
(1) the transmission torque is large, and in the same torque, most of the rotating diameters are smaller than the tooth couplings, small in size and light in weight, which can be partially replaced by the dental coupling.
(2) compared with the tooth type couplings, the structure is simple, with fewer components and more convenient manufacturing.
(3) the maintenance is convenient, the life is longer, remove the plate can replace the nylon pin.  
(4) nylon pin is self-run material, not lubrication, not only saves the lubricating oil, but also purifies the working environment.
(5) the vibration can be poor and noisy. Elastic dowel pin type coupling with certain compensation performance of the two axes relative offset, suitable for medium and high power drive, does not apply to have a certain request for vibration damping and noise must be kept under strict control of the work.