Patent ID: 9120243
Filing Date: 2015-09-01
Classification: B28D,E21C

Abstract:
1. A tool insert for insertion into a tool body of a tool bit for a surface working machine, the tool insert comprising: a cylindrical stem for engagement with the tool body, the cylindrical stem having a free base end opposite a body end, wherein the cylindrical stem comprises a first bevel around the circumference of the stem at the base end and a second bevel around the circumference of the stem at the body end, the first and second bevels for engaging the tool body and distributing load substantially evenly around the tool body; a tapered body connected directly or indirectly to the cylindrical stem at the body end thereof, the tapered body having an angle of taper (α); and a tip having a convex dome shape of radius (R) and connected for engaging a surface to be worked, the tip comprising an outer surface free of hard edges and adjacent the tapered body opposite the cylindrical stem.