WallCarb™ provides exceptional bearing properties in the harshest working environments. Originally designed for mud motor bearings used in directional drilling, it combines the wear resistance of tungsten carbide with a ductile and corrosion resistant matrix.
Typical Applications
Close-up of WallCarb™ Bearing Showing Spherical Carbide Particles
Wall Colmonoy Limited (UK) manufactures WallCarb™ via a unique manufacturing technique to create a fully adhered spherical tungsten carbide coating with minimal dilution ensuring high quality and performance of WallCarb™ components. Part sizes range from 1” OD to 12” OD (sizing assessed on an enquiry-by-enquiry basis). WallCarb™ coatings can be coated on the interior and exterior diameter or on flat surfaces.
The success of WallCarb™ lies in the high packing density of the spherical tungsten carbide particles, which produces a bearing surface with up to 90% tungsten carbide by area. This is significantly higher than coatings produced by Plasma Transferred Arc (PTA) or laser cladding to maximise the performance of the coating. WallCarb™ coatings are metallurgically bonded to the substrate ensuring excellent coating adhesion and no loss of coating during service. Average hardness value for the tungsten carbide ball is 1745 +/- 100 Hv0.5.
WallCarb™ Cross Section of Tungsten Carbide Particles Embedded in an Adherent Matrix and Maximum Surface Coverage
Bearing with Internal and External WallCarb™ Coating
Wall Colmonoy Limited has worked with OEM manufacturers and users of turbodrill equipment for downhole drilling in hard and abrasive formations, where WallCarb™ bearing components have lasted in excess of ten years with no discernible wear. WallCarb™ bearings have consistently outlasted standard industrial alternatives.
Watch this video of our Technical Manager, Warren Lewis, explaining WallCarb™ at SPE Offshore in 2019:
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