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Cobalt steel drill bit, 1/4 inch, 135-degree split point, straw finish

Chicago-Latrobe

Chicago-Latrobe 50813 Cobalt Screw Machine Drill Bit 1/4 in 135° Split Point

SKU CH-NJRR-22BRD

Cobalt steel drill bit with 135° split point for accurate starting in hard metals

  • TypeDrill Bits
  • MaterialCobalt Steel
  • 135° split point starts drilling on contact
  • Cobalt steel resists heat during heavy use
  • 1/4 inch size fits common chucks
  • Right-hand cutting clears chips efficiently
  • Straw finish identifies cobalt material instantly

Chicago-Latrobe 50813 Cobalt Drill Bit

This Chicago-Latrobe 50813 drill bit is a screw machine style cutting tool made from cobalt steel. It features a 1/4 inch size with a 135 degree split point design. The right-hand cutting direction and straw finish suit general-purpose metal drilling tasks. It is supplied new for professional and workshop use.

Check shank fit and material suitability

Verify that your drill chuck accepts a 1/4 inch shank before ordering. Confirm the workpiece material is compatible with cobalt steel cutting tools. The split point geometry aids self-centering but requires a rigid setup for best results. This bit is non-coolant through so external lubrication may be needed.

Suits metalworkers needing cobalt durability

This bit suits machinists and maintenance staff drilling steel and alloys where cobalt heat resistance matters. Buyers who need coolant-through capability for deep-hole drilling should look elsewhere. Those requiring coated bits for extended wear life in abrasive materials will need a different specification. It is not intended for wood or masonry applications.

Highlights

  • 135° split point starts drilling on contact
  • Cobalt steel resists heat during heavy use
  • 1/4 inch size fits common chucks
  • Right-hand cutting clears chips efficiently
  • Straw finish identifies cobalt material instantly

Specifications

BrandCHICAGO-LATROBE
TypeDrill Bits
MaterialCobalt Steel

Questions about this item

What comes in the box and do I need to buy anything else to use the 50813 drill bit?

The box contains the single 1/4 inch cobalt screw-machine drill bit with a 135° split point; no extra accessories are required to start drilling.

How do I decide which version or capacity of this bit to choose?

This listing is for the 1/4 inch size with decimal equivalent .2500 and a 135° split point; choose it when that exact diameter and point geometry match the hole you need.

What does the 135° split point mean once the bit is in my drill?

The 135° split point centres itself on contact, reduces wandering and cuts faster in hard materials such as stainless steel without needing a centre punch.

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