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Silver metal jobber drill bit with split point tip

Chicago-Latrobe

Chicago-Latrobe 42790 T 0.3580 HSS 135° split-point drill bit

SKU CH-M3Z3-27DEA

High-speed steel jobber drill bit with 135° split point for accurate starts in metal

  • Product typeDrill Bits
  • Main materialHAWA
  • 135° split point starts on contact without walking
  • High-speed steel construction resists wear in steel and alloy
  • TiAlN coating reduces friction and extends cutting life
  • Jobber length gives standard reach for general drilling
  • Decimal size .3580 matches letter T for precise hole diameter

Chicago-Latrobe 42790 T drill bit

This Chicago-Latrobe 42790 T drill bit is a jobber-length tool made from high-speed steel for general-purpose drilling. It suits machinists and maintenance technicians who need a reliable bit for creating precise holes in metal workpieces.

135-degree split-point tip with TiAlN coating

The 135-degree split-point geometry reduces walking and starts holes cleanly without a centre punch. A TiAlN coating adds surface hardness and heat resistance, extending tool life during repetitive drilling cycles in steel or alloy materials.

Check shank compatibility and coolant needs

Verify that your drill chuck or collet accepts the straight shank of this jobber-length bit before ordering. The design has zero coolant holes and is non-coolant-through, so external lubrication or air blast is required for deep-hole chip evacuation.

How it compares

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

Price $13.99
Cheaper than about 80% 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 split point do for drilling?

The 135-degree split point centres the bit without a pilot hole and reduces walking on hard surfaces.

What shank fits this jobber-length bit?

It has a straight round shank that fits standard three-jaw drill chucks.

How do you install the bit so it does not slip?

Open the chuck fully, insert the shank to the flats, tighten each jaw evenly, then verify zero run-out before drilling.

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