1.Downhole drilling machine: When drilling a downhole gun hole with a aperture less than 150 mm, in addition to the application of a rock drill, it can also be used to drill a small diameter of 80 ~ 150 mm. When drilling a gun hole with a diameter of less than 70 mm in coal or softer mineral rock, it is generally used to drill or air drill, driven by a motor (or air motor) to drill the drill pipe, and the rock (coal) chips drilled out are discharged through the spiral groove on the drill pipe.
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2025-08-14 09:03
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Thus, the lowly hub axle seal not only ensures the efficient function of the drivetrain but also protects against potentially catastrophic damage Thus, the lowly hub axle seal not only ensures the efficient function of the drivetrain but also protects against potentially catastrophic damage
The shaft surface must be smooth to prevent damage to the seal, and the operating temperature must fall within the acceptable range of the seal material The shaft surface must be smooth to prevent damage to the seal, and the operating temperature must fall within the acceptable range of the seal material
For instance, in high-temperature environments, oil seals made of heat-resistant materials like silicone rubber or fluoroelastomers are preferred For instance, in high-temperature environments, oil seals made of heat-resistant materials like silicone rubber or fluoroelastomers are preferred
The friction between the rotating shaft and the seal can lead to significant heat buildup, which can degrade the seal's performance and lifespan The friction between the rotating shaft and the seal can lead to significant heat buildup, which can degrade the seal's performance and lifespan