Superior - Model 6 1/4 FA 517 -Tricone Bit

Cutting Structure: Large Dia. Offset crested scoop compacts in inner row, wedge compacts in outer row and inequable spaced compacts arrangement. The durability of premium tungsten carbide inserts is improved with new formulas and new techniques for insert bit. Gauge Structure: Multiple gouge protection with gauge trimmers on the heel of cone, tungsten carbides inserts and hard-facing on the shirttail increases gauge holding capability and bearing life.