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


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    ALL Our bits are designed, machined & assembled in the great state of Oklahoma since 1947.


    Driven by customers' challenges, we make bits more more efficient, valueable and reliable.

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    ISO 9001 & TS 29001

    Certified since 2005

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    Learn about the latest technology making our bits

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    Need a custom bit fast? We deliver in 2 weeks

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    Designed, Machined & Assembled in the USA ​​


    Driven by customers' challenges, we make bits more efficient, valuable and reliable.

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    Throop Rock Bit is an American manufacturing company serving 42 countries around the world.

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    Our facility in Tonkawa, Oklahoma holds the following certifications: ISO 9001 & TS 29001

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    Our bits are made from advanced steel grades & special alloys for the toughest conditions.

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    Since its founding in 1947, Throop Rock Bit has been a trusted name in the drilling industry.

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    Throop Rock Bit products create value in a wide range of industries.

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    Our bits are designed, machined & assembled in the great state of Oklahoma since 1947.

  • "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.

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    Throop Rock Bit 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: 2015

    2. ISO/TS 29001: 2012


    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 performed by third party international registrars.

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  • Technology

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


    Our operations are based on unique expertise in materials technology, extensive knowledge about drilling processes and close customer cooperation. This combination, coupled with continuous investments in research and development (R&D), has enabled us achieve leading positions in the fields of mining, workover, and oil & gas.

    See our certifications for quality control procedures.

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  • Custom BUILT

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    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 Rock Bit 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.


    Whatever your needs, we can make it with our highest quality materials and in a quick timeline.