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Chicago-Latrobe 43781 135-degree split-point jobber drill bit, TiCN-coated high-speed steel, silver-gold finish

Chicago-Latrobe

Chicago-Latrobe 43781 135 Degree Heavy-Duty Jobber Length Drill pneumatic accessory

SKU CH-4MQ9-1KXAR

A 135-degree split-point jobber drill bit in high-speed steel with TiCN coating, sized K (.2810 decimal equivalent)

  • Product typeDrill Bits
  • Main materialHAWA
  • 135° split point reduces wandering on hard materials
  • High-speed steel with TiCN coating resists wear and heat
  • Jobber length gives reach for deeper holes
  • Size K letter drill with .2810 decimal equivalent
  • Heavy-duty construction handles demanding shop tasks

Chicago-Latrobe 43781 135 Degree Drill Bit

This Chicago-Latrobe 43781 is a heavy-duty jobber length drill bit designed for professional drilling tasks. It features a 135 degree split point for accurate starts and reduced walking. The bit is made from high-speed steel with a TiCN coating for durability. It suits machinists and technicians requiring precise hole making.

Suited For Letter K Drilling, Not Other Sizes

This drill bit suits users who specifically need a letter K size with a .2810 decimal equivalent. It is not for buyers who require a different letter or fractional size for their application. It also does not suit operations needing coolant-through capability as this model has zero coolant holes. Choose another bit if your project demands internal coolant delivery.

135 Degree Split Point Geometry

The defining specification is the 135 degree split point geometry combined with the TiCN coated high-speed steel construction. This point angle provides self-centering performance and efficient chip ejection in various materials. The split point design eliminates the need for centre punching in many cases. Verify the .2810 diameter matches your exact drilling requirement before purchase.

How it compares

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

Price $8.99
Cheaper than about 90% 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 shank size does the 43781 drill bit need for a standard chuck?

The 43781 is a jobber length bit with a straight shank matching its 0.2810 inch diameter, so it fits any three-jaw chuck that opens to at least that size.

How do I start the 135 degree split point without the bit walking?

Centre-punch the workpiece first; the 135 degree split point is self-centring but still needs a dimple to prevent initial wander on hard steel.

When should I replace the TiCN coating on this high speed steel bit?

Replace the bit when the gold TiCN layer has worn through to the silver substrate or when cutting edges chip, as the coating cannot be reapplied.

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