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Chicago-Latrobe 55456 black oxide drill bit with reduced shank

Chicago-Latrobe

Chicago-Latrobe 55456 118 Degree Silver & Deming Drill 7/8 in

SKU CH-PM2E-R9BDH

A high-speed steel drill bit with a 118-degree point and reduced shank for 7/8-inch holes

  • Product typeDrill Bits
  • 118-degree point starts holes cleanly on metal
  • Reduced 1/2 in shank fits standard drill chucks
  • High-speed steel body resists wear in tough alloys
  • Black oxide finish reduces friction and heat buildup
  • 7/8 in diameter handles large-diameter drilling tasks

Chicago-Latrobe 55456 Silver & Deming Drill

This 7/8 in drill bit features a 118-degree point angle and a black oxide finish on high-speed steel. It is designed for general-purpose drilling in metal and wood where a larger diameter hole is required. The 1/2 in reduced shank allows use with standard drill chucks.

Check your chuck capacity before ordering

The reduced shank measures 1/2 in, so your drill chuck must accept at least this diameter. Verify that your machine provides sufficient torque for a 7/8 in cutting diameter in your intended material. Ensure the workpiece is clamped securely to prevent the bit from grabbing.

Upgrades from smaller twist bits or spade bits

This bit replaces the need to step-drill or use less rigid large-diameter twist drills with undersized shanks. The Silver & Deming design provides a rigid, accurate hole in a single pass when a standard twist drill is too small. The jump is worth it for repetitive 7/8 in holes where precision and tool life matter.

How it compares

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

Price $34.99
Pricier than about 57% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE
Product typeDrill Bits

Questions about this item

Does the 7/8 in Silver & Deming drill bit come with any accessories or a case?

The drill bit is supplied as a single 7/8 in high-speed steel bit with 118 degree point angle and black oxide finish; no case or extra accessories are included.

How does the 1/2 in reduced shank affect which drill chucks accept this 7/8 in bit?

The 1/2 in reduced shank allows the 7/8 in bit to fit standard 1/2 in drill chucks, so it works with common hand drills and drill presses.

What materials can the 118 degree point angle and black oxide finish handle in everyday use?

The 118 degree point and black oxide coated high-speed steel are suited for general-purpose drilling in mild steel, cast iron and similar ferrous metals.

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