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Silver cobalt jobber drill bit split point 135 degree .3230 size P

Chicago-Latrobe

Chicago-Latrobe 54115 135 Degree Cobalt Drill Bit .3230

SKU CH-NBEH-XYSYT

Jobber-length cobalt drill bit with 135-degree split point for hard metals, .3230 inch size

  • TypeDrill Bits
  • MaterialHAWA
  • 135-degree split point starts holes cleanly without wandering
  • Cobalt steel with TiN coating resists heat and wear
  • Jobber length gives standard reach for general drilling
  • Letter P size (.3230) fits precise fractional requirements
  • Heavy-duty construction handles tough materials reliably

Chicago-Latrobe 54115 Cobalt Drill Bit

The Chicago-Latrobe 54115 is a jobber length drill bit made from cobalt with a TiN coating. It features a 135-degree split point designed for self-centering and reduced thrust. The decimal equivalent is .3230 inches, corresponding to letter size P. This accessory targets metalworking tasks requiring high heat resistance.

Suited for drilling hard metals

Machinists and maintenance technicians drilling stainless steel, titanium or high-temperature alloys will benefit from the cobalt substrate and split-point geometry. The bit is not designed for coolant-through operation, so deep-hole drilling requiring internal lubrication is not supported. Applications needing a non-cobalt substrate or a different point angle should consider alternative tooling.

135-degree split point geometry

The 135-degree split point is the defining specification that determines suitability for hard-metal work. It enables easier penetration and minimises walk on tough surfaces compared to standard angles. Buyers must verify that .3230 diameter and letter size P match the hole requirement before purchase.

Highlights

  • 135-degree split point starts holes cleanly without wandering
  • Cobalt steel with TiN coating resists heat and wear
  • Jobber length gives standard reach for general drilling
  • Letter P size (.3230) fits precise fractional requirements
  • Heavy-duty construction handles tough materials reliably

Specifications

BrandCHICAGO-LATROBE
TypeDrill Bits
MaterialHAWA

Questions about this item

How can I confirm the 135-degree split point is cutting correctly after I start drilling?

The split point should self-centre immediately and produce short, curled chips in steel without the bit walking across the surface.

What comes in the package and what must I supply myself?

The box contains the single cobalt jobber-length bit with TiN coating; you will need a compatible drill chuck or collet and cutting fluid if the application requires lubrication.

Which drill-bit designation should I select for a .3230-inch hole?

Choose the model marked 54115 with letter size P and decimal equivalent .3230 to match that exact diameter.

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