Chicago-Latrobe
Chicago-Latrobe 55475 118 Degree Silver & Deming Drill 1 11/64 in
A high-speed steel drill bit with a 118-degree point and reduced 1/2-inch shank for large-hole drilling
- TypeDrill Bits
- 1 11/64 in diameter covers large-hole drilling
- 118-degree point angle centres quickly in steel
- High-speed steel construction resists wear at speed
- Black oxide finish reduces friction and heat buildup
- 1/2 in reduced shank fits standard drill chucks
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.
Highlights
- 1 11/64 in diameter covers large-hole drilling
- 118-degree point angle centres quickly in steel
- High-speed steel construction resists wear at speed
- Black oxide finish reduces friction and heat buildup
- 1/2 in reduced shank fits standard drill chucks
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
Will the 118 degree point angle need regrinding after extended drilling?
The 118 degree point angle can be resharpened on a bench grinder or drill sharpener when it dulls, restoring the original cutting geometry for continued use.
What limits continuous drilling with the 1 11/64 in high-speed steel bit?
Heat buildup in the high-speed steel body is the first limit during sustained cutting; use cutting fluid and allow cooling pauses to maintain hardness.
How much heat does the black oxide finish generate during all-day drilling?
The black oxide finish helps retain lubricant and reduce friction, but the bit will still get hot under continuous load — pause periodically to let it cool.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
