Chicago-Latrobe
Chicago-Latrobe 55461 61/64 in 118° Black Oxide Drill Bit
A 61/64 in high-speed steel drill bit with a 118° point and black oxide finish for general-purpose drilling
- TypeDrill Bits
- Color/FinishBlack
- 61/64 inch diameter handles large holes
- 118 degree point angle centres quickly in metal
- Black oxide finish resists corrosion and wear
- High-speed steel construction cuts hard materials
- Half-inch reduced shank fits standard drill chucks
Chicago-Latrobe 55461 Drill Bit
The Chicago-Latrobe 55461 is a reduced shank drill bit sized at 61/64 inches. It is built from high-speed steel for machining tasks. The 118-degree point angle suits general-purpose drilling in metal and wood. This accessory fits power tools with a 1/2 inch chuck capacity.
Black Oxide Finish Benefits
The black oxide finish reduces friction and resists corrosion during use. It helps the bit retain lubricant for smoother cutting action. This surface treatment extends the working life of the high-speed steel material. The coating also minimises glare under workshop lighting.
Installation and Common Issues
Insert the reduced shank into a compatible 1/2 inch chuck and tighten securely before starting. Ensure the workpiece is clamped firmly to prevent the bit from walking at the start. Using incorrect speed or insufficient pressure can cause premature wear or breakage. Always clear chips regularly to avoid binding in deep holes.
Highlights
- 61/64 inch diameter handles large holes
- 118 degree point angle centres quickly in metal
- Black oxide finish resists corrosion and wear
- High-speed steel construction cuts hard materials
- Half-inch reduced shank fits standard drill chucks
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Color/Finish | Black |
Questions about this item
Will the 118° point on the 55461 bit need re-grinding after heavy use?
The 118° point angle can be re-sharpened on a bench grinder or drill-bit sharpener when it dulls; high-speed steel takes a fresh edge repeatedly without losing hardness.
What limits continuous drilling with the 61/64 in black-oxide bit?
Heat buildup in the high-speed steel is the first limit; using cutting fluid and clearing chips every few seconds keeps the 118° point from overheating and losing temper.
How hot does the 55461 bit get during all-day drilling?
The black-oxide finish helps dissipate heat, but the 1/2 in reduced shank still conducts warmth to the chuck; expect the bit to become too hot to touch without coolant breaks.
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