13 3/4" FSA437G , TCI Bit , Sealed Journal Bearing with Gauge Protection , Tricone Roller Bit , Tricone Drill Bit

RECOMMENDED DRILLING PARAMETERS FOR APPLICATION

The above chart represents commonly available sizes and types, we do produce other sizes and types of rock bits which do not appear on this list. Please contact us for more information.

Design of journal bearings

Journal bearings must provide a balanced bearing geometry and adequate journal strength and must maximize the thickness of the high-pressure lubricating film developed during hydrodynamic lubrication. The thickness of lubricating films is affected by:

- Surface areas
- Journal and cone diameters
- Clearances between journal and cone

Manufacturing tolerances must be precise so that surfaces run true. Roundness of journal and cone surfaces is important, and if any part of a bearing is out of round, the effectiveness of the lubrication regime will be adversely affected.

The metallurgy of a bearing must be balanced to minimize heat generation during boundary lubrication. Cone-bearing surfaces are steel. Soft, silver-plated sleeves are installed on the journal. Silver polishes easily, and minor surface irregularities from machining are quickly smoothed. This smoothness ensures low-friction operation and uniform lubricant flow over the bearing surface

Hejian City Feilong Retop Rock Bit Manufacture Co., Ltd. is established in 1992 and located in Hebei Province, China. Integrated with Beijing Feilong International Trade Co., Ltd. and Beijing Superior Drilling Equipment Co., Ltd. , the company has involved into a comprehensive enterprise integrating production, R&D and distribution of tricone bits, PDC bits, trenchless and rotary drilling tools.

The company serves the customers in oil & gas drilling, mining, exploration, HDD drilling and rotary drilling with covering a complete product line.

The company covers an area of 36,000 square meter and has more than 200 employees, including more than 100 technicians. The company has equipped with contemporary advanced processing equipment of processing and detecting and testing instruments. The company has obtained the certification of the quality system: ISO 9001, ISO 14001, OHSAS 18001 and mostly important API 7-1.

The company’s annual production of various drilling tools is over 10,000 sets, which exported to over 20 countries and regions. We, FeiLong ReTop ( FLRT ) are willing to cooperate with friends at home and abroad to make joint development and contribute to global energy development and urban infrastructure development.