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Chicago-Latrobe 55474 black oxide drill bit 118 degree point 1/2 reduced shank

Chicago-Latrobe

Chicago-Latrobe 55474 118 Degree Silver & Deming Drill 1/2 Reduced Shank

SKU CH-PQYA-RGCJ8

Drills 1 5/32 inch holes with a 118-degree point and 1/2 reduced shank

  • Product typeDrill Bits
  • 118-degree point angle starts holes cleanly without wandering
  • High-speed steel construction resists heat during extended drilling sessions
  • Black oxide finish reduces friction and adds corrosion protection
  • 1/2-inch reduced shank fits standard drill chucks securely
  • Model 55474 identifies this specific Chicago-Latrobe drill bit

Chicago-Latrobe 55474 Drill Bit

The Chicago-Latrobe 55474 is a Silver & Deming drill bit with a 1/2 reduced shank designed for drilling large diameter holes. It is intended for machinists and maintenance professionals who need to bore holes larger than standard chuck capacities allow.

118 Degree Point Installation

The 118 degree point angle is a standard geometry that centres easily without a pilot hole in most materials. The reduced shank fits a 1/2 inch chuck, but the large cutting diameter requires high torque and low RPM to prevent the bit from stalling or snapping in the workpiece.

High Speed Steel Black Oxide Limits

High speed steel with a black oxide finish offers good wear resistance in mild steel and cast iron, but it loses hardness quickly at elevated temperatures. The material is not suited for stainless steel, titanium or high-volume production drilling where carbide tooling would be required.

How it compares

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

Price $66.99
Pricier than about 74% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE
Product typeDrill Bits

Questions about this item

How can I verify the 118-degree point angle is cutting correctly after installing the bit?

The 118-degree point angle should centre itself quickly and produce even, consistent chips when drilling mild steel at appropriate speeds.

What accessories come with the 55474 drill bit and what must I supply separately?

The package contains only the single high-speed steel drill bit with black oxide finish. You must provide a compatible drill chuck or collet that accepts the 1/2 reduced shank.

Which Chicago-Latrobe Silver & Deming drill size should I select for a 1 5/32 in hole?

Choose the 55474 model; it is manufactured specifically for a 1 5/32 in drill bit size with the 1/2 reduced shank.

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