Throop Rock Bit celebrates 70 year's supplying the highest quality small diameter drill bits to the Oil & Gas, Mining, Water Well and Construction industries. Proudly 100% USA made!

Established in 1947, Throop Rock Bit has been designing and manufacturing custom rotary cone bits for more than half a century to serve all drilling applications – petroleum, mining, seismic exploration, water wells, quarrying, river crossings, foundation construction, and other industrial applications. Our designers are knowledgeable in the unique requirements specific to all these diverse applications.

Headquartered in Tonkawa, Oklahoma, USA, Throop Rock Bit Company designs, manufactures, and assembles all of its products in the United States using state-of-the-art technology, materials, and equipment. Our machinery and equipment includes state-of-the-art CNC machines tools. All bearing surfaces on our cones are finished and turned after heat treatment. All of our bits are assembled, greased and inspected in a special clean room area prior to welding and painting for shipment.

Throop rock bits are designed using both AutoCAD 2002 and Autodesk Inventor 2010 design and drafting software. Throop also utilizes a special rock bit design program developed specifically for the rock bit industry. This design system allows our engineers to more accurately design bits for optimum performance.

Throop’s products range in sizes from 1 7/8” through 9” in both tungsten carbide insert type bits and sealed bearing bits. Most models are available in designs for either regular or jet circulation with replaceable nozzles. Most TRB open bearing models are also available for use with air or fluid circulation, and many sizes are available in reverse circulation.