Tricone Bits 8 1/2 Inch International Oilfield Standard Material 42CrMo. Rubber Sealed Bearings: Equipped with rubber sealed roller bearings for enhanced durability and performance. TCI Tooth Type: Features TCI (Tungsten Carbide Insert) tooth type for efficient drilling in various formations. Wide Application Range: Suitable for water well, oil well, HDD, exploration, and geothermal drilling. High-Quality Material: Constructed from 42CrMo material for superior strength and wear resistance. Customized Service Available: Offers customization options including specific weight and pin connection configurations. Optimized Drilling Parameters: Provides recommended WOB and RPM ranges for different IADC codes to maximize efficiency. Certified Quality: Holds SY/T5164 and ISO9001:2008 certifications for quality assurance.