A Pin Bush coupling has pins and it works with coupling bolts. The rubber or leather bushes are used over the pins. The coupling has two halves dissimilar in construction. The pins are rigidly fastened by nuts to one of the flange and kept loose on the other flange.
A bush coupling consists of two hubs that can be made of different materials and are fitted with pins where rubber bushes are attached. They are flexible couplings that are reliable and for this reason they are widely applied to hoisting applications. Morskate offers bush couplings from both KTR and PTP. A tool for reaming or polishing small pinholes.