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Chicago-Latrobe 55488 black oxide drill bit 118 degree point reduced shank

Chicago-Latrobe

Chicago-Latrobe 55488 118 Degree Silver & Deming Drill 1/2 Reduced Shank

SKU CH-C3ZC-XRPB2

A reduced-shank drill bit with a 118-degree point angle for general-purpose drilling

  • Product typeDrill Bits
  • 118-degree point angle starts holes cleanly
  • High-speed steel construction resists wear during drilling
  • Black oxide finish reduces friction and heat buildup
  • 1/2-inch reduced shank fits standard drill chucks
  • Designed for Silver & Deming drilling applications

Silver & Deming drill for reduced-shank chucks

The Chicago-Latrobe 55488 is a silver and deming drill bit with a 1/2 reduced shank designed for chucks that cannot accept full-diameter shanks. It is made from machining high-speed steel with a black oxide finish for wear resistance.

118-degree point angle for general drilling

The 118-degree point angle provides a conventional cutting profile suitable for a wide range of ferrous and non-ferrous materials. Black oxide coating helps retain lubricity and reduces chip welding during extended use.

Suited for machinists needing large-hole capacity

This bit suits machinists and maintenance technicians who need to drill large diameters in a drill press or heavy-duty handheld drill with a 1/2-inch chuck. It is not for users requiring a full-diameter shank, a split-point geometry, or a coated high-performance substrate.

How it compares

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

Price $136.99
Pricier than about 90% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE
Product typeDrill Bits

Questions about this item

How often will the 118-degree point on the 55488 need resharpening?

Resharpening frequency depends on the material being drilled and feed pressure; high-speed steel with black oxide finish typically requires periodic touch-ups to maintain cutting efficiency.

What limits continuous drilling with the 1 3/8-inch reduced-shank bit?

The 1/2-inch reduced shank diameter is the primary constraint, as it restricts torque transmission and can slip in the chuck before the cutting edges reach their wear limit.

How much heat builds up in the 55488 during all-day drilling?

Black oxide finish helps dissipate heat, but sustained heavy cuts in tough alloys will raise temperatures enough to require cutting fluid and periodic pauses to protect the high-speed steel temper.

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