Pin drive roller kelly bushing has four strong steel pins on the bottom so it can fit into the holes of the same type master bushing. It transfers the master bushing’s rotation to Kelly. It can be classed as three types based on heavy, medium and light-duty. They are used for 17.1/2 to 49.1/2inch rotary tables. They are designed and manufactured according to API Spec 7K.

Pin drive roller kelly bushing has four strong steel pins on the bottom so it can fit into the holes of the same type master bushing. It transfers the master bushing’s rotation to Kelly. It can be classed as three types based on heavy, medium and light-duty. They are used for 17.1/2 to 49.1/2inch rotary tables. They are designed and manufactured according to API Spec 7K.