The Largest Russian Manufacturer of Rock Bits
792 Style
The 792 style of Three Cone Rock bits is designed for a multitude of drilling applications including: Mining and Mineral Exploration (M), Water Well production (WW), Construction (C) and Environmental (E).

The 792 style of Three Cone Rock bits has Air Jet circulation. Air is delivered to the bottom of the drill hole through Jet Nozzles which are located between the bit legs. Air is also delivered to the bearings, for cooling and lubrication, through a Passage in the bit leg, as shown in the picture. Interchangeable Nozzles are available in standard sizes from " to ".

These bits are designed to withstand both radial and axial loading. Radial loads are carried by the Open Bearing structure(see details on page Bearing structures): Roller Ball Friction Roller or Roller Ball Friction Roller Friction. The axial load is distributed over the hard surfaced load areas of the Journal. Rollers and Balls are made of vacuum-arc and electro-slag re-melted steel.

The cutting structures of the 792 style of Three Cone Rock bits may have either milled steel teeth, or tungsten carbide inserts

The 792 style of Three Cone Rock bits are available in sizes starting from 6" (152.4mm) to 10" (269.9mm).

Application Legend: C - Construction | E - Environmental | G/O - Gas/ Oil | GR - Geotech 
H/D - Horizontal/ Directional | M - Mining and Mineral Exploration | WW - Water Well

Size IADC Code Bearing Configuration: UralBMT Part No Pin Connection Recommended Applications
inch mm
6 152.4 523 Roller, Ball, Friction, Roller 792BMT06000523M3 API Regular 3 ½ C, M, WW, E
523 792BMT06000523M4
6 155.6 523 Roller, Ball, Friction, Roller 792BMT06125523M3 API Regular 3 ½ C, M, WW, E
523 792BMT06125523M4
158.7 523 Roller, Ball, Friction, Roller 792BMT06250523M3 API Regular 3 ½ C, M, WW, E
523 792BMT06250523M4
6 161.9 523 Roller, Ball, Friction, Roller 792BMT06375523M3 API Regular 3 ½ C, M, WW, E
523 792BMT06375523M4
165.1 523 Roller, Ball, Friction, Roller 792BMT06500523M3 API Regular 3 ½ C, WW, E
523 792BMT06500523M4
171.4 112 Roller, Ball, Friction, Roller, Friction 792BMT06750112M API Regular 3 ½ C, M, WW, E
232 792BMT06750232C
523 792BMT06750523M3
523 792BMT06750523M4
543 792BMT06750543C3
543 792BMT06750543C4
7 200 232 Roller, Ball, Friction, Roller, Friction 792BMT07875232C API Regular 4 ½ C, M, WW, E
523 792BMT07875523M3
523 792BMT07875523M4
9 228 523 Roller, Ball, Friction, Roller, Friction 792BMT09000523M4 API Regular 4 ½ M
543 792BMT09000543C4
9 250.8 523 Roller, Ball, Friction, Roller, Friction 792BMT09875523M3 API Regular 6 M, WW
523 792BMT09875523M4
543 792BMT09875543C3
543 792BMT09875543C4
10 269.9 523 Roller, Ball, Friction, Roller, Friction 792BMT10625523M4 API Regular 6 M

Application Legend: C - Construction | E - Environmental | G/O - Gas/ Oil | GR - Geotech 
H/D - Horizontal/ Directional | M - Mining and Mineral Exploration | WW - Water Well

Special sizes are also available upon request. Please contact us

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