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Cylindrical cobalt drill bit with gold TiN coating and split point tip

Chicago-Latrobe

Chicago-Latrobe 54059 17/64 in 135° Cobalt TiN Split Point Drill Bit

SKU CH-A4SS-YWHC6

17/64-inch cobalt jobber drill with 135-degree split point and TiN coating

  • TypeDrill Bits
  • MaterialHAWA
  • 135° split point starts on contact for accurate holes
  • Cobalt steel with TiN coating resists heat and wear
  • 17/64 in fractional size matches common jobber specs
  • Decimal equivalent 0.2656 in for precise tool selection
  • Jobber length design fits standard chucks and drill presses

Chicago-Latrobe 17/64 in Cobalt Drill Bit

This Chicago-Latrobe jobber-length drill bit measures 17/64 inch with a 135-degree split point. It is made from cobalt steel with a titanium nitride coating. The bit is designed for general-purpose drilling in metal and other hard materials.

Suited for precision metal drilling.

Machinists and maintenance technicians who need a durable bit for stainless steel or alloy work will appreciate the cobalt construction and split-point accuracy. Users who primarily drill soft wood or plastic may find a standard high-speed steel bit more economical for those tasks.

135-degree split point controls walk

The 135-degree split-point geometry reduces wandering at the start of the hole and improves centring without a centre punch. This single feature determines whether the bit matches the precision requirements of the job.

Highlights

  • 135° split point starts on contact for accurate holes
  • Cobalt steel with TiN coating resists heat and wear
  • 17/64 in fractional size matches common jobber specs
  • Decimal equivalent 0.2656 in for precise tool selection
  • Jobber length design fits standard chucks and drill presses

Specifications

BrandCHICAGO-LATROBE
TypeDrill Bits
MaterialHAWA

Questions about this item

What chuck size does the 17/64 in drill bit require?

The 17/64 in shank fits a standard three-jaw chuck that accepts up to 0.2656 in diameter.

How do I start the hole without the bit walking?

The 135° split point centres on contact; apply steady pressure and let the cobalt tip bite before increasing speed.

When should the TiN-coated cobalt bit be replaced?

Replace it when the gold coating wears through at the cutting edges or the split point no longer self-centres cleanly.

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