Chicago-Latrobe
Chicago-Latrobe 55478 118° Silver & Deming Drill 1/2 Reduced Shank
A 118-degree high-speed steel drill bit with a 1/2 reduced shank for heavy-duty drilling
- TypeDrill Bits
- 1/2 reduced shank fits standard chucks
- 118° point angle centres quickly in metal
- High-speed steel body resists wear
- Black oxide finish reduces friction
- 1 7/32 in diameter for large-hole drilling
Chicago-Latrobe 55478 Silver & Deming Drill
The Chicago-Latrobe 55478 is a Silver & Deming drill bit built with a 1/2 inch reduced shank. It fits standard drill chucks while providing a larger 1 7/32 inch cutting diameter. The 118 degree point angle suits general-purpose drilling in metal and other machinable materials.
Machining High Speed Steel with Black Oxide finish
The bit is manufactured from machining high speed steel and finished with a black oxide coating. This combination resists heat buildup during normal drilling operations and reduces friction for smoother cutting. The material choice supports consistent performance and extended tool life in workshop use.
Reduced shank design for broad chuck compatibility
The 1/2 inch reduced shank allows the large-diameter bit to be secured in common drill chucks without requiring a specialised holder. This simplifies setup for machinists and maintenance technicians. The straight shank provides reliable grip and concentricity during drilling tasks.
Highlights
- 1/2 reduced shank fits standard chucks
- 118° point angle centres quickly in metal
- High-speed steel body resists wear
- Black oxide finish reduces friction
- 1 7/32 in diameter for large-hole drilling
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
How is the 1/2 reduced shank secured in a drill chuck, and what step is often missed?
Tighten the chuck evenly on the reduced shank so the bit runs true; the step often missed is checking for wobble before applying full pressure.
What maintenance will the high-speed steel bit with black oxide finish need later?
Resharpen the 118-degree point when cutting slows, and wipe off chips to keep the oxide coating from loading up.
What limit appears first when drilling 1 7/32 in holes continuously in steel?
Heat buildup at the cutting edges dulls the 118-degree point fastest, so pause to let the bit cool.
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