Chicago-Latrobe 55445 45/64 in 118 Degree Silver & Deming Drill

Drill bit for large-hole drilling

The Chicago-Latrobe 55445 is a Silver & Deming drill bit sized at 45/64 in with a 118-degree point angle. It is made from high-speed steel with a black oxide finish for machining tasks. This bit targets machinists and maintenance technicians who need to enlarge existing holes or drill large diameters in metal.

Fits standard half-inch chucks

The reduced 1/2 in shank allows the bit to be used in common drill presses and handheld drills that cannot accept larger straight shanks. This design frees the operator from needing a machine with a larger spindle capacity. High-speed steel construction suits general-purpose cutting in ferrous and non-ferrous materials.

Replaces smaller step drills or worn large bits

When a project demands a precise 45/64 in hole, this bit removes the need for stepping up through multiple sizes or regrinding dull tooling. The jump is worth it when hole accuracy and finish quality outweigh the cost of a dedicated large-diameter cutter. Not for buyers who need smaller incremental sizes or cobalt-grade heat resistance.