The trenchless single roller bits delivered by Zhiteng are welded onto a roller cone type rock reamer for horizontal directional drilling, which is widely used in the construction of municipal, gas, telecommunication and oil & gas pipeline crossing projects, with stable quality and excellent performance. The product adopts a steel ball locked journal bearing structure, and the bearing surface is welded with wear-resistant alloy, which has high wear resistance and long service life. Optimize the number of tooth rows, number of teeth, and exposed tooth height in the design, enhance the wear resistance of the outer side of the roller cone and lug back, to make the trenchless bit meet the working conditions of horizontal directional drilling, and improve the product’s performance.