Asbury Machine Corporation

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Established in 1947, Throop Rock Bit Company has continuously designed and manufactured rotary cone rock bits for more than half a century. The company began as a manufacturer of the smallest size rotary cone rock bits for water well and mining applications and has progressively increased the sizes and types available.Throop has expanded its product line to serve all applications for rotary drilling bits - petroleum, mining, seismic exploration, water wells, quarrying, river crossings, foundation construction, and other industrial applications.Our staff is knowledgeable in the unique requirements specific to these many and 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, including Aut0CAD 2002 design, CNC machinery, and in-house heat treating.Throop Rock Bit Company plant in Tonkawa, Oklahoma, USA, is centrally heated and air conditioned for the comfort and efficiency of our shop work force. Throop's skilled machinists, welders, assembly personnel and shipping staff are seasoned veterans in the rock bit industry who choose to live and work in a stable rural environment.Our machinery and equipment includes state-of-the-art CNC machine tools. All 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 AutoCAD 2002 design and drafting software in conjunction with a special rock bit design program developed especially for the rock bit industry. This design system allows our engineers to more accurately design bits for optimum performance.It is with these materials, manufacturing and design capabilities, and pride in workmanship that we are able to produce one of the finest lines of rotary drilling bits available in the sizes and types that we produce.