Dennis Tool Company makes specialty bearing products used in many applications such as Oilfield Drilling Tools. In many oilfield applications, PDC Thrust Bearings directly replace Roller or Ball Bearings. PDC bearings are able to carry much higher loads and can operate in the harsh downhole environment without protection. PDC bearings operate in mud, air, or air mist environments without seals. This enables them to be used in high temperature applications up to 1600°F. Use of PDC Thrust Bearings results in lower reactive torque than roller or ball bearings, which creates less power losses in the tool. The typical life improvement of PDC Thrust Bearings vs. standard Roller or Ball Bearings is usually about 10-20 times or more.