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Silver metal twist drill bit with split point tip and cylindrical shank

Chicago-Latrobe

Chicago-Latrobe 42787 135° Heavy-Duty Jobber Drill Bit Q .3320

SKU CH-1AEJ-HDBCN

135-degree split-point jobber drill bit in high-speed steel with TiAlN coating, size Q (.3320 decimal)

  • Product typeDrill Bits
  • Main materialHAWA
  • 135° split point starts on contact for accurate holes
  • High-speed steel with TiAlN coating resists wear and heat
  • Q letter size .3320 decimal equivalent fits precise applications
  • Jobber length gives standard reach for general drilling
  • Heavy-duty construction handles tough materials in daily use

Heavy-Duty Jobber Drill Bit Q .3320

The Chicago-Latrobe 42787 is a jobber-length drill bit sized to letter Q with a decimal equivalent of .3320. It is made from high-speed steel with a TiAlN coating and features a 135-degree split point. The bit is designed for general-purpose drilling in metalworking and maintenance tasks.

Suited for machinists needing a coated split-point

This bit suits users who want a TiAlN-coated high-speed steel drill with a 135-degree split point for reduced walking. It is not for buyers who require coolant-through capability or a different point angle for specialised materials.

135-degree split point with TiAlN coating

The 135-degree split point centres the bit quickly and lowers thrust when drilling hard metals. The TiAlN coating adds wear resistance and helps extend tool life in high-speed applications. No coolant holes are present on this model.

How it compares

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

Price $10.99
Cheaper than about 86% 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

Should I choose the Q .3320 drill bit or a different letter size for my project?

Select the Q .3320 bit when your plans call for a 0.3320-inch hole; other letter sizes correspond to different diameters, so match the bit to the exact hole size you need.

What does the 135-degree split point do once the bit is in the drill?

The 135-degree split point centres the bit without a centre punch and reduces thrust, letting it start cleanly in steel and other hard materials.

How does the TiAlN coating on this high-speed steel bit affect cutting performance?

The TiAlN coating increases surface hardness and heat resistance, allowing higher cutting speeds and longer tool life in tough alloys.

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