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Bright uncoated solid carbide straight flute drill bit, 1/4 inch, 140 degree point

Chicago-Latrobe

Chicago-Latrobe 78600 1/4 in 140° solid carbide straight flute drill

SKU CH-2B1G-5SJB8

Solid carbide 1/4 in straight flute drill with 140° point angle for high-precision drilling

  • TypeCutting Tools
  • MaterialSolid Carbide
  • Solid carbide construction resists wear
  • 140° point angle centres the bit quickly
  • Four-facet point reduces walking on hard materials
  • Bright uncoated finish suits general machining
  • 1/4 in diameter with 1 3/8 in flute length

Chicago-Latrobe 78600 solid carbide drill bit

The Chicago-Latrobe 78600 is a 1/4 inch solid carbide straight flute drill bit designed for machining hard and abrasive materials. Its rigid carbide construction resists wear and deflection better than high-speed steel alternatives. Machinists and fabricators use it for precise holemaking in tough alloys and composites.

Upgrading from high-speed steel to carbide

Switching to this carbide bit extends tool life and holds tighter tolerances when drilling hardened steels, cast iron or non-ferrous metals. The jump is worth it when high-speed steel dulls too quickly or cannot maintain the required finish. Carbide also allows higher cutting speeds for shorter cycle times in repetitive production work.

Verify machine rigidity and coolant setup

Solid carbide requires a rigid spindle and secure workholding to prevent chipping the cutting edges. Confirm your equipment can run the recommended speeds and feeds for carbide tooling without excessive vibration. A flood or mist coolant system helps manage heat and evacuate chips from the straight flutes during deep cuts.

Highlights

  • Solid carbide construction resists wear
  • 140° point angle centres the bit quickly
  • Four-facet point reduces walking on hard materials
  • Bright uncoated finish suits general machining
  • 1/4 in diameter with 1 3/8 in flute length

Specifications

BrandCHICAGO-LATROBE
TypeCutting Tools
MaterialSolid Carbide

Questions about this item

What chuck size fits the 1/4 in shank on the 78600 drill?

A 1/4 in or larger drill chuck will hold the 0.25 in shank securely.

How do I start the 140° point without it walking on hard material?

Use a centre punch or a short pilot drill first; the four-facet point on the 78600 is not self-centring on hard surfaces.

When should I replace the solid carbide 78600 bit?

Replace it when the cutting lips show chipping or the 1 3/8 in flute length no longer clears chips effectively.

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