Click to learn about our production process

    ISO 9001 & TS 29001

    Certified since 2005

    Learn about the latest technology making bits

    Need a custom bit fast? We deliver in 2 weeks

    Designed, Machined & Assembled in the USA ​​

  • "Our customers choose Throop Rock Bit because we put quality and service first."




  • Quality Certified

    Each of our products is inspected several times throughout the manufacturing process. These inspections are performed by highly qualified inspectors that are independent of the day-to-day manufacturing process. This independent inspection process provides another layer of control, which ensures delivery of the highest quality product to our customers.

    Throop Rock Bit Company is committed to meeting our customers' expectations and requirements through quality, service, reliability and continual improvement of all processes. As our customers' needs and world demands change, we adapt through constant monitoring of international standards and communicating with our customers to determine their needs.


    Quality Certifications:


    1. ISO 9001

    2. ISO/TS 29001


    Our certifications have been in place since March of 2005. Throop ensures future quality success through a thorough internal audit process as well as annual registration audits which are performed third party international registrars.

  • Technology

    Our machinery and equipment includes the latest Model CNC machine tools, such as five-axis machining centers, as well as an impressive lineup of lathes, speciality and inspection equipment.


    Auto CAD and Auto Desk Inventor Suite are our featured software for design and drafting, while MasterCam software is used for programming on the machining side.

  • Custom BUILT

    Throop Rock Bit is the world’s largest manufacturer of the smallest diameter roller cone bits, with sizes as small as 1 7/8” in diameter.


    Although we have steadily increased our size range, one thing has never changed: Throop remains steadfastly committed to excellence and its goal of offering quality products and unparalleled service.


    We have the capability to manufacture custom bits based on our clients specifications.


    We assure you that whatever your needs, we can make it with our highest quality materials and in a quick timeline.

  • 100% USA Made


    Throop Rock Bit is headquartered in Tonkawa, Oklahoma USA and takes great pride in being a U.S. owned and operated manufacturer in an age when many companies have chosen to have products manufactured overseas. Throop is committed to the local economy and has a dedicated work force of highly skilled machinists, welders, assembly personnel and seasoned veterans in manufacturing and design serving the drilling industry for over 70 years.