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Chicago-Latrobe 55120 screw machine drill bit 7/16 inch high speed steel TiN coated

Chicago-Latrobe

Chicago-Latrobe 55120 Screw Machine Drill Bit 7/16 in 118 Degrees Point

SKU CH-JYAG-924DV

A screw-machine drill bit with a 118-degree conventional point for high-speed steel drilling

  • Product typeDrill Bits
  • Main materialHAWA
  • 7/16 in diameter drills precise holes in metal
  • 118 degree conventional point centres quickly without wandering
  • High-speed steel with TiN coating resists heat and wear
  • Right-hand cutting direction suits standard drill chucks
  • Decimal equivalent 0.4375 in simplifies size matching

Chicago-Latrobe 55120 Screw Machine Drill Bit

The Chicago-Latrobe 55120 is a new screw machine drill bit made from high-speed steel with a TiN coating. It features a 7/16 in diameter and a 118-degree conventional point angle. The decimal equivalent is 0.4375 in and it cuts in a right-hand direction.

Suited for general-purpose drilling.

This bit suits machinists and maintenance technicians drilling into steel and other ferrous materials where a standard 118-degree point performs well. The TiN coating helps extend tool life in repetitive screw-machine operations. It is not for buyers who need coolant-through capability or a split-point design for self-centering without a centre punch.

118-degree conventional point angle

The 118-degree conventional point angle is the specification that determines suitability. It provides a strong chisel edge for general-purpose drilling but requires a centre punch for accurate hole starting. If your application demands a self-centering split point or a different angle for hard materials, this bit will not meet that requirement.

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

How do I install the 7/16 in drill bit with the 118-degree point, and what step do people often get wrong?

Insert the shank fully into the chuck and tighten all three jaws evenly so the 118-degree point runs true; the common error is leaving the shank slightly loose, which makes the bit walk at start-up.

What maintenance or replacement will the HAWA high-speed steel bit with TiN coating need later?

Resharpen the 118-degree conventional point when cutting slows; the TiN layer wears first, after which the underlying HAWA steel can be reground multiple times before replacement.

What limit shows up first when drilling continuously with the 0.4375 in right-hand cutting bit?

Heat buildup at the 118-degree point is the first limit; without coolant the TiN coating loses hardness quickly, so pause or reduce feed to keep the edge from softening.

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