Chicago-Latrobe
Chicago-Latrobe 55491 118 Degree Silver & Deming Drill 1 27/64 in 1/2 Reduced Shank
A 1 27/64 inch Silver & Deming drill bit with a 118 degree point angle and 1/2 inch reduced shank for high speed steel machining
- TypeDrill Bits
- 1 27/64 in diameter for large-hole drilling
- 118-degree point angle starts cleanly in metal
- Black oxide finish resists corrosion and wear
- High-speed steel construction handles tough materials
- 1/2 in reduced shank fits standard chucks
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.
Highlights
- 1 27/64 in diameter for large-hole drilling
- 118-degree point angle starts cleanly in metal
- Black oxide finish resists corrosion and wear
- High-speed steel construction handles tough materials
- 1/2 in reduced shank fits standard chucks
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
Will the 1/2 reduced shank on the Chicago-Latrobe 55491 fit the chuck of my older 1/2 inch capacity drill press?
Yes, the 1/2 reduced shank is sized for standard 1/2 inch chucks found on many older drill presses and hand drills.
How can I verify the 118 degree point angle is cutting correctly after I install the bit?
The bit should centre itself without a pilot hole and produce even, continuous chips in steel when run at the proper speed for 1 27/64 inch diameter.
Does the Chicago-Latrobe 55491 come in a protective case or is it sold as a single loose bit?
It is supplied as an individual drill bit; no case, sleeve or additional accessories are included in the packaging.
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