Quality of the diaphragm you choose is a large consideration, and not all diaphragms are the same. The Rubber material can widely vary depending on temperature, mixing time, and mold style. This results in significant viscosity variations during manufacturing and an inconsistent product.
Big Hammer Co is an aftermarket manufacturer for all the brands we sell. Big Hammer Co is not endorsed or sponsored by, or in any way associated with Kent/Furukawa Rock Drill (FRD). This product is an aftermarket part.
Any use of or reference to the Kent/FRD brand or trademark is for the sole purpose of indicating compatibility or product fit, and is not meant to imply any affiliation or relationship between Big Hammer Co and Kent/FRD and/or the Kent/ Furukawa Rock Drill Trademark.