On the basis of research for alloy W and many experiment in well site, we select a new type of alloy W, and make the structure of mill - tool better, get a set of high efficient mill - tool, they are flat - base milling bit, concave - base milling bit, cone mill bit, tube mill bit and multiple cone mill bit.

By analysis of the face tooth machining for the ultralong face tooth spindle,the method of adding side set machining with the angular milling head on 160 mm NC boring lathe has been presented,which has solved the issues both of the side set machining and the precision for the ultralong face tooth spindle.