Abstract: The structural properties and performance be-havior of Roller Cone Bit used in oil drilling are dis-cussed. The methods and technological character of
Roller Cone Bit processing are analyzed, and prob-lems associated with conventional grinding processing of the internal hole and secondary radial placing are discussed in detail. A further analyses is made on the
technological aspects of replacing cutting by grind-ing, including feature of the machine tools, selection and performance of the cutting tools, selection of the
cutting regimes, property of the cutting fluid, and mounting and locating, etc. The validity and value of the method of processing roller cone bit with
grinding instead of cutting is demonstrated not only by the reduction in production cost, but also by pro-longed working time of the bit as shown by the well site statistic data.

Key words: Roller bit, Machining, Technological pro-cess, Method, Research