Chicago-Latrobe
Chicago-Latrobe 57231 31/64 in 118° Split Point Drill Bit
Jobber-length high-speed steel drill bit with a 31/64 inch split point and 118° angle for general-purpose drilling
- TypeDrill Bits
- MaterialHAWA
- 31/64 inch diameter covers medium-hole drilling tasks
- 118-degree split point centres quickly without wandering
- High-speed steel construction resists wear in steel and iron
- Black oxide finish reduces friction and chip welding
- Jobber length provides standard reach for general-purpose work
Drill Bit for Metalwork
The Chicago-Latrobe 57231 is a 31/64 inch jobber length drill bit designed for general-purpose drilling in metal. Its high-speed steel construction with a black oxide finish provides durability and corrosion resistance for professional and workshop use. The 118-degree split point allows for accurate starts without a centre punch. This fractional-inch bit suits maintenance, fabrication and repair tasks.
Check Chuck Capacity and Material
Before ordering, verify that your drill chuck accommodates a 31/64 inch shank, which has a decimal equivalent of 0.4844 inch. The bit is non-coolant through with zero coolant holes, so it relies on external lubrication or dry cutting depending on the workpiece. Confirm the material you are drilling is compatible with high-speed steel; this bit is not intended for masonry, glass or hardened tool steel.
Replaces Worn Standard-Point Bits
This split-point bit replaces dull or damaged standard 118-degree jobber drills of the same diameter. The split-point geometry reduces walking and lowers thrust requirements, making the upgrade worthwhile when drilling thin sheet metal or when precise hole placement matters. It does not replace cobalt, carbide or coolant-through tooling for high-volume production or difficult alloys.
Highlights
- 31/64 inch diameter covers medium-hole drilling tasks
- 118-degree split point centres quickly without wandering
- High-speed steel construction resists wear in steel and iron
- Black oxide finish reduces friction and chip welding
- Jobber length provides standard reach for general-purpose work
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
Does the 57231 drill bit come alone or in a set, and will I need a separate chuck?
The 57231 is a single jobber-length bit; it fits any standard 1/2-inch chuck, so no extra chuck is required.
Should I choose the 31/64 inch size or a different diameter for a 0.4844 inch hole?
31/64 inch is the exact fractional size that equals 0.4844 inch, so this bit matches that hole diameter precisely.
How does the 118-degree split point perform when the bit enters steel?
The 118-degree split point centres itself on contact and reduces wandering, giving a cleaner start in steel without a centre punch.
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