We strive to grow our business with the same honesty and integrity we use to machine our products - putting quality, value and service first.

Our machinery and equipment includes state-of-the-art CNC machines tools. All bearing surfaces on our cones are finish turned after heat treatment. All of our bits are assembled, greased and inspected in a special clean room area.

All our products are designed using both the latest AutoCAD and Autodesk Inventor 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.

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.

Established in 1947, Asbury Throop has been designing and manufacturing rotary cone 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 since expanded its product line to serve all applications for rotary drilling bits – such as 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 all these diverse applications.

Asbury Throop is headquartered in Tonkawa, Oklahoma, USA. We design, manufacture, and assemble all of our products in the United States using state-of-the-art technology, materials, and equipment. The Asbury Throop Company plant 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.