Roller cutters is suitable for mining ventilation shafts, the main cone adopts large diameter wedge insert for higher wear resistance. According to the needs of different formations, the matching cutting structure can be designed, including insert material, insert shape and the number of insert rows. High quality NSK thrust bearing which improve the bearing load. Floating oil sealing imported from Germany is a guarantee of long sealing time and high bearing life. The combination of A and B cutter achieves full coverage of the bottom hole crushing zone. The full coverage of the broken belt greatly improves the rock breaking efficiency, and has a wide range of applications. It can use cutter heads with diameters of 1 meter, 1.2 meters, 1.4 meters, and 2 meters.