Products: Categories: Mining by three-cone drill 
 Product Name: 250mm three-cone drill bit for mining 
 Products: mining drill for the use of air-cooling and non-sealed bearing drill bit clean. 
 Optimized to make the structure more reliable bearing design, reasonable, and the bit is widely used in mining, construction drilling industries. 
 Advanced air flow design, the work of the bearing surface temperature maintained at the ideal state and effectively prevent debris entering the bearing, the bearing inside a clean space. 
 Dental veneers fitted palm dorsal tooth and carbide alloy welding flow path means to strengthen security, ensure the overall life of the bit. Bearing surface of a special heat treatment process to improve the service life of bearings and bearing capacity.