Chicago-Latrobe 57231 31/64 in 118° Split Point Drill Bit

Drill Bit for Metalwork

The Chicago-Latrobe 57231 is a 31/64 inch jobber length drill bit designed for general-purpose drilling in metal. Its high-speed steel construction with a black oxide finish provides durability and corrosion resistance for professional and workshop use. The 118-degree split point allows for accurate starts without a centre punch. This fractional-inch bit suits maintenance, fabrication and repair tasks.

Check Chuck Capacity and Material

Before ordering, verify that your drill chuck accommodates a 31/64 inch shank, which has a decimal equivalent of 0.4844 inch. The bit is non-coolant through with zero coolant holes, so it relies on external lubrication or dry cutting depending on the workpiece. Confirm the material you are drilling is compatible with high-speed steel; this bit is not intended for masonry, glass or hardened tool steel.

Replaces Worn Standard-Point Bits

This split-point bit replaces dull or damaged standard 118-degree jobber drills of the same diameter. The split-point geometry reduces walking and lowers thrust requirements, making the upgrade worthwhile when drilling thin sheet metal or when precise hole placement matters. It does not replace cobalt, carbide or coolant-through tooling for high-volume production or difficult alloys.