| 摘要 |
<p>A tool insert is provided for increasing the operating life of a tool bit comprising both the tool insert and an associated tool body. The tool insert when connected to the tool body, provides at least partial protection from wear during use of the tool bit. The tool insert includes a tip free of hard edges or creases that increases the operating life of the tip. In addition, the tip may optionally include a portion, either the tip itself or a tapered body adjacent the tip that has a diameter at least equal to or larger than the diameter of the connection end of the tool body. This increases the shielding ability of the tool insert during use and further extends the operating life of the tool bit by shielding the tool body. In one embodiment, the invention provides for 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; and a tip connected for engaging a surface to be worked, the tip comprising an outer surface free of hard edges.</p> |
