Gbm manufacturing pvt ltd is one of the major manufacturers of variety of mechanical power transmission couplings & expansion joints in india. The coupling product range includes gear coupling, pin-bush coupling, resilient coupling, disc coupling, tyre coupling and in expansion joints it includes non-metallic fabric type, multi layer fabric belt, metallic & rubber. For metallic expansion joint the company follow ejma standard. Non-metallic expansion joints are manufactured as per astm standard. Rotopin pin bush type couplings are in use in general industrial applications over many years and are quite useful in drives where limited misalignment of shafts is unavoidable.Rotopin flexible coupling comprises two hubs in cast iron of high quality and a variable number of flexible elements, depending on the power to be transmitted. The flexible elements of rubber bushes are capable of damping vibration and shock loads as well as accepting misalignment that inevitably occurs between rotating shafts which are independently supported. A rotopin flexible coupling is suitable for rotation in either direction and does not require lubrication. Rubber used for manufacture of bushes is of high quality and works as a safeguard against any bad effect of water, dust and atmospheric conditions.