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Extra long 7/16 inch HSS drill bit black oxide split point 135 degree angle

Chicago-Latrobe

Chicago-Latrobe Extra Long Drill 7/16" HSS 11120 135° Split Point Black Oxide

SKU CH-1758-B3EXP

Extra-long HSS drill bit with 135° split point and black oxide finish drills deep holes up to 4 1/16 in. in a single pass

  • Product typeDrill Accessories
  • Extra reach for deep holes with 4 1/16 in drilling depth
  • Clean starts on tough steel with 135° split point tip
  • HSS body resists wear in high-performance machining
  • Black oxide finish cuts friction at 28° helix angle

Extra-long 7/16" HSS drill bit

The Chicago-Latrobe 11120 is a high-speed steel drill bit with a 135-degree split point and black oxide finish. It is designed for deep-hole drilling where standard-length bits cannot reach. The fractional 7/16-inch diameter suits metalworking tasks that require precise pilot holes. Machinists and maintenance technicians will find it useful for extended-reach applications.

Sustained drilling in tough alloys

The 28-degree helix angle promotes steady chip evacuation during prolonged cuts, reducing heat buildup in the cutting zone. High-speed steel construction maintains edge integrity when drilling to the maximum 4 1/16-inch depth in a single pass. The split-point geometry keeps the bit centred without a separate centre punch, saving setup time on repetitive jobs. Black oxide coating adds lubricity and corrosion resistance for longer service life.

How it compares

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

Price $21.99
Cheaper than about 60% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameChicago-Latrobe
Product typeDrill Accessories

Questions about this item

How much heat does the 135° split-point bit generate during extended drilling?

The 135° split-point geometry reduces thrust force, which lowers friction and heat build-up during long drilling sessions.

What shank size must my drill chuck accept to hold the 7/16" bit?

The bit has a 7/16 inch shank, so your drill chuck must open to at least that diameter.

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