Annular shim for construction bit having multiple perforations f
Auger bit
Bit for drilling holes in rocks
Braze fixtures for use in drilling tools
Brazing inserts
Butterfly-type shim having perforations in mid-section thereof a
Butterfly-type shim having semi-opened bottom and double sandwic
Button insert for rock drill bits
Carbide tipped drill bit for boring holes in concrete and steel
Cast steel rock bit cutter cones having metallurgically bonded c
Composite structure for cutting tools
Concave drag bit cutter device and method
Curved contact portion on engaging elements for rotary type drag
Cutter mounting and apparatus and method for a drill bit
Cutter mounting for drag bits
Cutting and drilling apparatus with threadably attached compacts
Cutting element for a rotary drill bit and method for making sam
Cutting element with wear resistant crown
Detachable drill bit for impact drilling
Detachable shoe plates for large diameter drill bits