A Valco 4 3/4" rock drill bit is a roller cone bit (tricone) designed for drilling soft to medium rock formations, featuring a 4.75-inch diameter, milled steel teeth, sealed bearings, and often a 2 7/8" pin thread for connecting to drill pipe, commonly used in oil & gas, water well, and foundation drilling. These bits, like the IADC 211 type, excel in formations like shale, sandstone, and limestone, providing an aggressive cutting action for efficient drilling.
Key Specifications & Features:
Size: 4 3/4 inches (4.75")
Type: Roller Cone (Tricone)
Cutting Structure: Milled Tooth (steel teeth)
IADC Code: Often IADC 211 (soft formations) or 117 (softer)
Bearing: Sealed, Friction Bearing with Ball Retention
Application: Soft to medium formations (shale, limestone, sandstone, mudstone, dolomite)
Thread: Typically 2 7/8" Pin