Chicago-Latrobe 52453 118 Degree 53/64 in Drill Bit

Chicago-Latrobe 52453 Reduced Shank Drill Bit

This Chicago-Latrobe 52453 drill bit features a 53/64 in diameter and a 118-degree point angle. It is manufactured from high-speed steel with a black oxide finish for durability. The reduced 1/2 in shank allows use in standard drill chucks. It suits metalworking tasks requiring this specific large diameter.

Upgrading from smaller bits or worn high-speed steel

Replace smaller diameter bits when a 53/64 in hole is required for bolts or piping. The jump is worth it when the reduced shank fits existing 1/2 in chucks, avoiding the need for a larger drill press. A worn bit showing poor chip evacuation or walking on steel indicates replacement.

Practical limits of high-speed steel

High-speed steel performs well in mild steel and cast iron but wears faster in stainless or hardened alloys. The 118-degree point suits general-purpose drilling but may walk on very hard surfaces without a pilot hole. Black oxide finish aids lubricity but does not replace cutting fluid in deep holes. Builders needing cobalt or carbide for abrasive materials should select a different substrate.