OD-Turning / pin-machining from Lothmann EFFICIENTLY CREATE OUTSIDE DIAMETERS WITH A BELL TOOL

With a bell tool, various outside diameters with high form and positional accuracy can be produced very quickly and easily on a machining centre. The name is derived from the shape of the tool, which fits over the contour to be machined like a bell. The internal cutting edges on the basic body are therefore typical. In terms of production technology, machining with a bell tool can be described as an external countersinking process. Several concentric outer profiles are produced with one tool.

The rationalisation factor with these tools is very high for both cubic and rotationally symmetrical workpieces. In the cubic range, only partial elements of the workpiece are usually machined, such as studs or spigots, which can alternatively only be produced by time-intensive circular milling. In the turning area, the machining time can be halved by a double-edged design of the bell tool compared to conventional turning with one cutting edge.

Bell tools from Lothmann are designed with ISO inserts and can be used for different materials such as steel, aluminium or cast materials by exchanging the insert. The achievable diameter tolerances for sintered inserts are approx. +-0.1mm. The bell tools can also be designed with precisely ground inserts or with fine adjustments. This can reduce the achievable diameter tolerance to +-0.01mm. The tools are balanced at high form tolerances so that high accuracies in roundness are achieved.