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Chicago-Latrobe 55484 silver and deming drill bit with 1/2 inch reduced shank black oxide finish

Chicago-Latrobe

Chicago-Latrobe 55484 118 Degree Silver & Deming Drill 1/2 Reduced Shank

SKU CH-ZRQD-F33FZ

A 1 5/16 inch high-speed steel drill bit with a 118-degree point and half-inch reduced shank for large-hole drilling

  • Product typeDrill Bits
  • 118-degree point centres quickly for accurate starts
  • High-speed steel resists wear in tough materials
  • Black-oxide finish reduces friction and adds corrosion resistance
  • 1/2-inch reduced shank fits standard chucks
  • 1 5/16-inch diameter handles large-hole drilling

Silver & Deming Drill 55484

The Chicago-Latrobe 55484 is a high-speed steel drill bit built for heavy-duty drilling tasks. It serves machinists and maintenance crews who need to enlarge existing holes in metal stock. The 118-degree point angle supports general-purpose cutting across a range of ferrous and non-ferrous materials.

Black Oxide Finish & Reduced Shank

A black oxide coating adds corrosion resistance and helps retain cutting lubricant during operation. The 1/2-inch reduced shank allows this large-diameter bit to fit standard drill chucks, letting operators use it on common bench or handheld drills without specialised tooling.

1 5/16-Inch Cutting Diameter

The bit cuts a precise 1 5/16-inch hole, making it the decisive specification for jobs requiring this exact bore size. Shops needing smaller or larger diameters must select a different bit from the Silver & Deming series.

How it compares

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

Price $109.99
Pricier than about 85% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE
Product typeDrill Bits

Questions about this item

What does the 118-degree point angle mean for drilling performance?

The 118-degree point angle is a general-purpose geometry suitable for drilling mild steel, cast iron and similar materials with the high-speed steel cutting edges.

What chuck capacity is required for the 1/2 reduced shank?

The 1/2 reduced shank fits any drill chuck that accepts a 1/2 inch shank diameter, allowing the larger 1 5/16 inch bit to be used on standard 1/2 inch chucks.

How should the black oxide finish be treated during initial use?

Apply cutting fluid or oil before drilling to lubricate the high-speed steel flutes and prevent the black oxide coating from overheating and wearing prematurely.

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