Hunan Tianying Technology

We are one specialist maker of rock drilling tools, founded in 1958. Tricone bits (rotary bits) are our mainly manufactured item, of which various sizes from 3-7/8" to 36" are available at our factory and various styles are applicable for drilling different kinds of rock formations. Our tricone bits can be devided into two series: steel tooth tricone bit (mill tooth tricone bit) and TCI tricone bit (tungsten carbide tricone bit), both of which are used for mining, piling, water well drilling and oil well drilling. Our tri-cone bits are of American style and we process our products strictly according to API standard and ISO9001-2001 quality controlling certificate, that can ensure you of our offering good quality products.