Hejian Zhongcheng Bit Manufacture Co.LTD. was established in 1997. It is a privately owned and proudly company. We have grown to become a leading manufacturer of tricone bit and PDC bits and supplier of high quality drilling tools & equipment, and we excel in designing, manufacturing, and distributing construction industry drilling tools as well as finding custom solutions to complex problems. 

SuRuiFeng a registered brand -"SRF"

 For tricone bit,size range:3"-26".For PDC drill bit,size range:5 1/2"to 17 1/2"
          SRF Bit carries all brands of drill bits, such as, Kingdream,Lilin,CS,Hughes, Smith,.
          Contact us now to get a quick, competitive quote for any drill bits you need.


Our broad spectrum of customers allows us to offer a dynamic range of products and solutions, you can trust us to meet your industry"s demands. From working with drilling tool designers, custom part design, drafting, implementation to machining fabrication, assembly and distribution, we are ready to meet any of your industry"s drilling challenges. At "ZHONGCHENG" we feel it is important to work closely with both our customers and suppliers to develop a relationship based on trust and cooperation.
Our company"s machine shop uses state of the art CNC's to manufacture parts to extremely high precision and accuracy. We constantly acquire and stock quality raw materials to reduce lead times on our products, and work closely with our customers to continuously improve their products in an effort to reduce their cost per foot when drilling.
"Hejian Zhongcheng Bit Manufacturering Co.LTD. (SRF)" has a large machine shop with numerous high quality CNC Lathes and Mills including a 4 Axis 26" Diameter Spindle Bore Lathe. We have a large welding area, and commonly preform ARC, MIG, TIG and pressure welding applications. So if you have any request for the Drill bits,drilling tools,please Call us or send inquiry to US at any time.