Chicago-Latrobe
Chicago-Latrobe 55445 45/64 in 118 Degree Silver & Deming Drill
Drills 45/64 in holes with a 118 degree point angle in high-speed steel
- TypeDrill Bits
- 45/64 in diameter drills large holes
- 118° point angle starts quickly in metal
- 1/2 in reduced shank fits standard chucks
- High-speed steel resists heat during drilling
- Black oxide finish reduces friction and wear
Drill bit for large-hole drilling
The Chicago-Latrobe 55445 is a Silver & Deming drill bit sized at 45/64 in with a 118-degree point angle. It is made from high-speed steel with a black oxide finish for machining tasks. This bit targets machinists and maintenance technicians who need to enlarge existing holes or drill large diameters in metal.
Fits standard half-inch chucks
The reduced 1/2 in shank allows the bit to be used in common drill presses and handheld drills that cannot accept larger straight shanks. This design frees the operator from needing a machine with a larger spindle capacity. High-speed steel construction suits general-purpose cutting in ferrous and non-ferrous materials.
Replaces smaller step drills or worn large bits
When a project demands a precise 45/64 in hole, this bit removes the need for stepping up through multiple sizes or regrinding dull tooling. The jump is worth it when hole accuracy and finish quality outweigh the cost of a dedicated large-diameter cutter. Not for buyers who need smaller incremental sizes or cobalt-grade heat resistance.
Highlights
- 45/64 in diameter drills large holes
- 118° point angle starts quickly in metal
- 1/2 in reduced shank fits standard chucks
- High-speed steel resists heat during drilling
- Black oxide finish reduces friction and wear
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
Will the 118 degree point angle hold up when drilling through thick steel all day?
The 118 degree point is a general-purpose geometry; sustained heavy use in hard steel will dull the edge faster than a split-point or cobalt bit.
How hot does the black oxide high-speed steel get during continuous drilling?
High-speed steel with black oxide finish dissipates heat adequately for intermittent cuts, but extended runs without coolant will raise temperatures enough to reduce edge life.
Does my drill need a specific chuck size for the 1/2 reduced shank on the 45/64 bit?
A standard 1/2 inch capacity drill chuck is required to grip the reduced shank securely.
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