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Chicago-Latrobe 50855 cobalt screw machine drill bit, straw finish, Z size, 135 degree split point

Chicago-Latrobe

Chicago-Latrobe 50855 Screw Machine Drill Bit Z Size 135 Degrees Point Cobalt

SKU CH-E26S-8FJGT

A cobalt screw-machine drill bit in Z size with a 135-degree split point for right-hand cutting at 0.4130 decimal equivalent

  • Product typeDrill Bits
  • Precise starts with 135-degree split point
  • Drills tough alloys using cobalt construction
  • Right-hand cutting suits standard chucks
  • Decimal size .4130 matches Z designation
  • Free shipping threshold at $75 orders

Product Identity

Chicago-Latrobe 50855 is a screw machine drill bit in Z size with a 135-degree split point made from cobalt steel. It is designed for professional machinists and maintenance technicians who need a right-hand cutting tool with a 0.4130 inch decimal equivalent for precise hole-making operations.

Compatibility Check

Verify that your drill press, lathe or portable drill accepts straight-shank bits and can run at speeds suitable for cobalt tooling. Ensure the workpiece material and setup match the non-coolant-through design and that the machine spindle rotates in a right-hand direction for proper engagement.

Ideal User Profile

This bit suits shops drilling medium to hard metals where cobalt heat resistance and split-point self-centering improve accuracy and tool life. It is not intended for buyers who need coolant-through capability, left-hand cutting direction or a different drill bit size for their specific application.

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

Questions about this item

Does the 50855 drill bit come in a set or is it sold individually?

The product is listed as a single Screw Machine Drill Bit, so one Z-size bit is supplied in the package.

When should I choose the Z size with 0.4130 decimal equivalent over another diameter?

Choose the Z size when your project calls for a 0.4130-inch hole; the 135-degree split point helps start accurately in metal without a centre punch.

How does the 135-degree split point perform in a handheld drill versus a drill press?

The 135-degree split point is self-centring, so it reduces wandering in both handheld and stationary drilling, while the cobalt construction resists heat during extended use.

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