Carbide Counterbore .358" cut Dia - .187" pilot for Caged Bearing FKP-TWB-CB-.197x.357x.066

Carbide Counterbores
Major Diameter (shoulder): .358/.359”
Minor Diameter (pilot): .1865/.187”D x .1250"
Material: Carbide
Type: One piece - non-removable pilot
Fits our Caged Bearings
Knife Bearings - Caged Pair - .197"ID x .357"OD x .066"T for 3/16" Pivots Folders
These are carbide so they should last a very long time if you are drilling wood, g10 or phenolic. They will also relieve metal like stainless or titanium but expect them to wear faster. Like all drills, consider these a consumable. Eventually, they will wear enough they have to be replaced. Since they are carbide, they will snap if subjected to side loads where a regular drill bit could handle it. Secure your work piece and keep your drilling straight up and down. If you snap one of these, you own both pieces.