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Silver cylindrical drill bit with split point tip and black shank marking

Chicago-Latrobe

Chicago-Latrobe 42796 135° Heavy-Duty Jobber Length Drill Bit

SKU CH-R8C8-R31MC

A 135-degree split-point jobber drill bit in high-speed steel with TiAlN coating for general-purpose drilling

  • Product typeDrill Bits
  • Main materialHAWA
  • 135° split point starts on contact for accurate holes
  • High-speed steel with TiAlN coating resists heat and wear
  • Jobber length suits general-purpose drilling tasks
  • .4130 inch diameter matches letter-size Z specification
  • Non-coolant solid construction simplifies use on standard drills

Chicago-Latrobe 42796 Jobber Drill Bit

The Chicago-Latrobe 42796 is a heavy-duty jobber length drill bit designed for general-purpose metal drilling tasks. It suits mechanics, fabricators and maintenance technicians who need reliable hole-making in steel and other ferrous materials.

Split-point tip with TiAlN coating

The 135-degree split-point geometry reduces walking and enables faster penetration without a centre punch. A TiAlN coating increases surface hardness and heat resistance, extending tool life during repetitive drilling operations in tough alloys.

Non-coolant solid construction

This bit lacks internal coolant channels, so chips must evacuate through the flutes. Deep holes in sticky materials may require frequent pecking to clear swarf and prevent overheating. The .4130-inch diameter fixes the hole size for specific clearance or tapping requirements.

How it compares

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

Price $20.99
Cheaper than about 62% 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

What does the 135-degree point angle mean for drilling performance?

The 135-degree split point is designed for harder materials and reduces walking at the start of the hole.

What size drill chuck is required for the .4130-inch diameter shank?

The decimal equivalent is .4130 inches, which corresponds to a Z letter size and requires a chuck that accommodates this diameter.

How should the TiAlN-coated high-speed steel bit be used to avoid premature wear?

Use appropriate cutting speeds and feed rates for the material; the TiAlN coating allows higher temperatures but does not eliminate the need for proper technique.

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