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Chicago-Latrobe 50571 extra-long 1/2 inch drill bit, black oxide finish, 118-degree point

Chicago-Latrobe

Chicago-Latrobe 50571 118 Degree Heavy-Duty Extra Long Drill Bit

SKU CH-FQ9M-SDAE3

Extra-long high-speed steel drill bit with 118-degree notched point and black oxide finish for deep general-purpose drilling

  • Extra-long reach with 7 1/2 in drilling depth
  • 118-degree notched point for accurate starts
  • High-speed steel construction for durability
  • Black oxide finish resists corrosion
  • 28-degree helix aids chip removal

Chicago-Latrobe 50571 1/2 in Drill Bit

This Chicago-Latrobe 50571 drill bit is built for deep-hole work in general-purpose machining. Its extra-long body reaches 7 1/2 in maximum drilling depth, making it suited for maintenance and fabrication tasks that standard bits cannot reach.

Suited for Deep Holes in Steel

Mechanics and fabricators drilling through thick steel plate or structural sections will benefit from the 4xD proportion and notched 118-degree point. Buyers who need higher heat resistance for stainless steel or exotic alloys should look at cobalt or carbide alternatives instead.

118-Degree Notched Point in High-Speed Steel

The 118-degree notched point is the specification that determines whether this bit matches the job; it centres quickly in mild steel and reduces wander at the 28-degree helix angle. If the application demands a split point or a different angle for harder materials, this is not the correct choice.

How it compares

Measured against everything we stock in Power Drills, Drivers & Cutting Bits, at today’s prices. Recalculated every night.

Price $33.99
Cheaper than about 70% of the 2,412 comparable items (median $81.99).

Specifications

Product
Brand nameCHICAGO-LATROBE

Questions about this item

What shank diameter fits the 1/2 in drill bit?

The 1/2 in drill bit uses a standard 1/2 in straight shank that fits any drill chuck accepting that size.

How do I start the 118 degree notched point without it walking?

Apply steady pressure and keep the drill perpendicular; the notched point self-centres but requires a firm start to prevent wandering.

When should I replace the high-speed steel bit?

Replace it when the cutting edges dull, the black oxide coating wears off, or the 118 degree point angle no longer cuts cleanly.

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