| 摘要 |
The burnishing tool has a shank that is mountable in a hand drill chuck. An end of the shank is received in a bore in an inside member with a conical inside burnishing surface. A transverse shaft passes through a slot through the inside member and a bore through the spindle to connect the inside member to the shank and to permit limited axial movement between the inside member and the shank. A cup member with an outside conical burnishing surface has a hub that receives a post on the inside member. The transverse shaft that connects the inside member to the shank also passes through a bore through the hub to secure the cup member to the shank. The connections between the shank, the inside member and the cup member permit movement of these members relative to each other to align the conical burnishing surfaces with pipe surfaces. The burnishing tool for two pipe diameters has a shank with a first conical burnishing surface on a shank. Second and third conical burnishing surfaces are on an inside cup member that receives the shank and is axially movable relative to the shank. A fourth conical burnishing surface is on an outside cup member that receives the shank and is substantially axially fixed relative to the shank. |
