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Extra long #15 HSS drill bit, black oxide finish, split point

Chicago-Latrobe

Chicago-Latrobe Extra Long Drill Bit #15 HSS 11139

SKU CH-D4BJ-GF1ZV

An extra-long high-speed steel drill bit sized #15 with a 135-degree split point and black-oxide finish for deep-hole drilling up to 2 3/16 inches

  • Product typeDrill Accessories
  • Main materialHAWA
  • Extra reach with 4xD length for deep holes
  • #15 wire-gauge bit drills precise small diameters
  • 135° split point starts fast without walking
  • High-speed steel with black oxide resists wear

Extra Long Drill Bit #15 HSS

The Chicago-Latrobe Extra Long Drill Bit #15 is manufactured from high speed steel with a black oxide finish. It features a 135 degree split point for accurate starting. The 28 degree helix suits high performance machining. Maximum drilling depth reaches 2 3/16 in.

Wire Size 4xD Application

This bit targets wire gauge holes at a 4xD depth ratio. The extra long flute clears chips from deeper holes. It is not for standard length drilling jobs. Buyers needing shorter bits or different diameters should select another size.

How it compares

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

Price $9.99
Cheaper than about 88% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameChicago-Latrobe
Product typeDrill Accessories
Size & build
Main materialHAWA

Questions about this item

When will the #15 HSS bit need replacement?

Replace the bit when the split point dulls or the black oxide coating wears away, reducing cutting efficiency in wire-gauge holes.

What limits continuous drilling with this 135-degree split-point bit?

Chip evacuation in the 2 3/16 in flute length becomes the limiting factor during sustained high-speed steel drilling.

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