Chicago-Latrobe 55475 118 Degree Silver & Deming Drill 1 11/64 in

Chicago-Latrobe 55475 Drill Bit

The Chicago-Latrobe 55475 is a Silver & Deming drill bit sized at 1 11/64 in with a 118-degree point angle. It is manufactured from machining high-speed steel and features a black oxide finish for corrosion resistance. A 1/2 in reduced shank allows use in standard drill chucks that cannot accept larger straight shanks. This accessory targets maintenance and fabrication tasks requiring a large-diameter hole.

Reduced Shank and Material Benefits

The 1/2 in reduced shank lets the bit fit common 1/2 in capacity drill chucks without needing a specialised holder. High-speed steel construction maintains hardness at elevated temperatures generated when drilling large diameters. The black oxide finish reduces chip welding and improves lubricity during cutting. These features combine to extend bit life and improve hole quality in tough materials.

Suitability for Large-Diameter Drilling

This bit suits machinists, maintenance technicians and fabricators who need to drill 1 11/64 in holes in steel, cast iron or similar alloys using a standard portable drill or drill press. It is not intended for precision boring or reaming operations that demand tighter tolerances. Buyers who require a different diameter, a split-point geometry for self-centring, or a cobalt alloy for harder alloys should look at other options.