Chicago-Latrobe
Chicago-Latrobe 78490 118 Degree Solid Carbide Spade Drill 780
A solid carbide spade drill bit with a 118-degree point angle for general-purpose drilling
- Solid carbide construction resists wear
- 118-degree point angle centres quickly
- Bright uncoated finish reduces friction
- 5/16 in drill bit size for precision holes
- Decimal equivalent .3125 matches exact specs
Solid Carbide Spade Drill Bit
The Chicago-Latrobe 78490 is a solid carbide spade drill bit sized at 5/16 inch with a 118-degree point angle. It features a bright uncoated finish and a decimal equivalent of .3125 inch. This cutting tool is designed for machining operations requiring high hardness and wear resistance.
Machinists needing a 5/16 inch carbide spade drill
This bit suits machinists who need a 5/16 inch solid carbide spade drill with a 118-degree point for general-purpose drilling. It is not for users requiring a coated tool for extended life in abrasive materials or a different drill bit size or point geometry. Buyers needing a specific shank type not described here should verify compatibility separately.
118-degree point angle
The 118-degree point angle and solid carbide material are the primary specifications that determine suitability for an application. This combination provides high rigidity and heat resistance for drilling tough alloys. Confirm the drill bit size of 5/16 inch and the bright finish match the job requirements before ordering.
Highlights
- Solid carbide construction resists wear
- 118-degree point angle centres quickly
- Bright uncoated finish reduces friction
- 5/16 in drill bit size for precision holes
- Decimal equivalent .3125 matches exact specs
Specifications
| Brand | CHICAGO-LATROBE |
|---|
Questions about this item
What size drill chuck is required for the 5/16 inch shank on this 78490 bit?
The shank measures 5/16 inch (0.3125 in decimal), so the drill chuck must accept at least that diameter.
Can this solid carbide spade drill be used in a standard hand drill or does it require a rigid machine?
Solid carbide is brittle and performs best in a rigid machine such as a drill press or CNC; hand-held use increases breakage risk.
How can I confirm the 118 degree point angle is cutting correctly after setup?
A correctly ground 118° point produces two equal cutting lips and centred chips; verify with a drill point gauge or by inspecting the chip symmetry.
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