Chicago-Latrobe
Chicago-Latrobe 55472 118 Degree Silver & Deming Drill 1/2 Reduced Shank
Reduced-shank drill bit with 118-degree point angle for general-purpose metal drilling
- TypeDrill Bits
- 118° point angle starts holes accurately
- Black oxide finish resists wear and corrosion
- High-speed steel construction handles demanding drilling tasks
- 1/2" reduced shank fits standard drill chucks
- Model 55472 identifies this Chicago-Latrobe drill bit
Chicago-Latrobe 55472 Drill Bit
The Chicago-Latrobe 55472 is a Silver & Deming drill bit designed for drilling large-diameter holes in metal. It features a 1/2 inch reduced shank to fit standard drill chucks. The 118 degree point angle provides reliable centering and cutting action in general-purpose machining applications. This new accessory suits maintenance technicians and metalworkers needing a single large-hole tool.
Upgrade from smaller twist drills
This bit replaces the need to step-drill or use hole saws for a 1 1/8 inch diameter hole in steel. The jump is worth it when a clean, accurate hole must be produced in one pass without pilot-hole wandering. The reduced shank allows use in 1/2 inch capacity drill presses or heavy-duty hand drills where larger taper-shank tooling cannot fit. It is not for production runs requiring carbide tool life or coolant-fed drilling systems.
High-speed steel with black oxide
The high-speed steel construction handles ferrous metals like mild steel and cast iron with appropriate cutting speeds. Black oxide finish adds lubricity and corrosion resistance during operation. The bit runs out when used on hardened steels, stainless alloys, or non-ferrous materials that demand specialised point geometries or coatings. It also lacks the rigidity for deep-hole drilling beyond standard flute length.
Highlights
- 118° point angle starts holes accurately
- Black oxide finish resists wear and corrosion
- High-speed steel construction handles demanding drilling tasks
- 1/2" reduced shank fits standard drill chucks
- Model 55472 identifies this Chicago-Latrobe drill bit
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
What chuck size does the 1/2 reduced shank on the 55472 drill bit fit?
The 1/2 inch reduced shank fits any standard drill chuck that accepts a 1/2 inch diameter shank, allowing use with 3/8 inch or 1/2 inch capacity drills.
How should the 118 degree point angle be aligned when starting a hole with this Silver & Deming bit?
Apply steady pressure perpendicular to the workpiece so the 118 degree point centres itself; the common error is tilting the drill, which causes the bit to walk or cut oversize.
When does the black oxide finish on this high-speed steel bit indicate it needs replacement?
Replace the bit when the cutting lips show visible rounding or chipping, or when drilling requires excessive force and produces discoloured chips despite proper lubrication.
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