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Cobalt screw machine drill bit, 1/2 inch, straw finish, 135 degree split point

Chicago-Latrobe

Chicago-Latrobe 50829 Screw Machine Drill Bit Cobalt 135° Split Point 1/2 in

SKU CH-5V9Q-VQKNJ

A cobalt steel screw-machine drill bit with a 135° split point for 1/2 in holes

  • Product typeDrill Bits
  • Cobalt alloy resists heat during heavy drilling
  • 135° split point starts holes without wandering
  • Right-hand cut suits standard drill chucks
  • 1/2 inch diameter handles large fastener clearance
  • M42 steel grade keeps edges sharp longer

Chicago-Latrobe 50829 cobalt drill bit

The Chicago-Latrobe 50829 is a screw machine drill bit made from HSS-CO 8% (M42) cobalt steel. It measures 1/2 in with a decimal equivalent of .5000 and features a 135 degree split point. The straw bronze finish identifies the material. It is designed for right-hand cutting in non-coolant-through applications. Machinists and maintenance technicians use it for precise drilling in tough alloys.

1/2 in capacity with 135 degree split point

The 1/2 in diameter provides a .5000 decimal equivalent hole size suitable for standard fastener clearance. The 135 degree split point reduces walking and lowers thrust requirements when starting a cut. Cobalt construction maintains hardness at elevated temperatures generated in stainless steel or high-strength steels. The bit runs out when hole depths exceed the screw machine length flute capacity or when coolant-through delivery is required.

Straw bronze finish and split point geometry

The straw bronze surface indicates the cobalt heat treatment without adding a coating that could mask wear. The split point geometry changes the chisel edge to two cutting lips, which improves centring on curved or angled surfaces. Right-hand cutting direction matches conventional drill presses and portable drills. Non-coolant-through design limits use to external flood cooling or dry drilling only.

How it compares

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

Price $12.99
Cheaper than about 82% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE
Product typeDrill Bits

Questions about this item

Will the 1/2 inch 135° split point bit fit my older drill press chuck?

The 1/2 inch shank fits any standard 1/2 inch capacity chuck, and the 135° split point reduces walking on hard metals.

How can I confirm the cobalt bit is cutting correctly after installing it?

A clean, straw-coloured chip and steady feed without excessive heat show the M42 cobalt edge is performing as intended.

Does the 50829 come with a case or just the single bit?

The package contains the single 1/2 inch screw machine drill bit; no case or additional accessories are included.

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