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Cobalt jobber drill bit, 27/64 inch, 135 degree split point, TiAlN coated

Chicago-Latrobe

Chicago-Latrobe 44927 27/64 in 135° Cobalt Jobber Drill Bit

SKU CH-23CY-QXCF5

27/64 inch cobalt jobber drill bit with 135 degree split point for hard metals

  • Product typeDrill Bits
  • Main materialHAWA
  • 27/64 inch size drills precise holes in metal
  • 135-degree split point reduces walking for accurate starts
  • Cobalt construction resists heat during heavy-duty drilling
  • TiAlN coating extends tool life in tough materials
  • Jobber length provides standard reach for general use

Chicago-Latrobe 44927 Cobalt Drill Bit

The Chicago-Latrobe 44927 is a jobber length drill bit made from cobalt steel with a TiAlN coating for extended wear resistance. It features a 135 degree split point designed for self-centering and reduced thrust in hard materials.

Suited for machining hard metals

This bit suits machinists drilling stainless steel, titanium and other tough alloys where the 135 degree geometry and cobalt substrate resist heat and work hardening. It is not for buyers who need coolant-through capability or a different point angle for specialised applications.

27/64 inch fractional diameter

The single specification that decides fit is the 27/64 inch drill bit size, which equals a .4219 decimal equivalent and requires a matching chuck capacity and hole requirement.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $23.99
Cheaper than about 57% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE
Product typeDrill Bits
Size & build
Main materialHAWA

Questions about this item

How does the 135-degree split point affect the bit's tendency to wander on hard steel?

The 135-degree split point is designed to self-center and reduce walking on hard materials, allowing the bit to start cutting immediately without a center punch.

Does the cobalt construction and TiAlN coating run cooler during extended drilling in stainless steel?

Cobalt steel retains hardness at higher temperatures than standard HSS, and the TiAlN coating further reduces friction and heat buildup during sustained high-speed drilling.

Will the 27/64 inch shank fit my 1/2 inch drill chuck without a reducer?

The 27/64 inch decimal equivalent is 0.4219 inches, which is smaller than a 1/2 inch chuck capacity, so it will fit directly without a reducer sleeve.

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