Cap Screw Counterbores are designed to create a recess for socket head cap screws and shoulder screws. They are also used for spot facing smaller spots, enlarging or cleaning holes. Solid pilot will not score or damage pilot hole. Cutting action is chatterless.
3 FLUTE Cap Screw Counterbores
3 FLUTE Cap Screw Counterbores - METRIC
Fillister Head Screw Counterbores are designed to create a recess for small fillister and flat head machine screws. Solid pilot will not score or damage pilot hole. Cutting action is chatterless.
FILISTER HEAD Screw Counterbores
Interchangeable counterbores are designed to create a recess for a cap screw, spring or bolt. They are used with interchangeable pilots ground to fit various hole sizes to be counterbored.
STRAIGHT SHANK Interchangeable Counterbores
TAPER SHANK Interchangeable Counterbores
Interchangeable counterbore pilots are used with interchangeable pilot style counterbores and spot facers, including carbide tipped and aircraft counterbores to produce various combinations of sizes. All counterbore pilots have flat on one side of shank.
COUNTERBORE STEP DRILLS
Counterbore Step Drills are designed to do two jobs in a single pass. They are used to drill a hole with a counterbore, countersink, or chamfer.
Step Drills page