Chicago-Latrobe 55491 118 Degree Silver & Deming Drill 1 27/64 in 1/2 Reduced Shank

Chicago-Latrobe 55491 Silver & Deming Drill

The Chicago-Latrobe 55491 is a Silver & Deming drill bit designed for machine drilling applications. It features a 1/2 inch reduced shank that allows use with standard drill chucks. The bit is manufactured from high speed steel for durability in metalworking tasks. It suits professional machinists and maintenance technicians requiring large-diameter holes.

1 27/64 inch capacity and 118 degree point angle

The drill bit creates holes at a precise 1 27/64 inch diameter for specific fastening or clearance requirements. Its 118 degree point angle provides reliable centring and chip evacuation in general-purpose steel and iron. The black oxide finish adds lubricity and corrosion resistance during extended cutting cycles. The reduced shank limits maximum diameter to the chuck capacity of the driving tool.

Upgrade from standard twist drills

This bit replaces standard twist drills that cannot reach 1 27/64 inch diameter due to shank limitations. It also upgrades from smaller Silver & Deming bits when the application demands this exact hole size. The jump is worth it when a single large hole must be drilled accurately without stepping up through pilot sizes. It is not for handheld drilling or materials requiring specialised point geometries.