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Black oxide steel drill bits in indexed metal case, 29 pieces, 135 degree split points

Chicago-Latrobe

Chicago-Latrobe 57719 29-piece 135° screw machine drill bit set

SKU CH-YG15-2AJ3Y

29-piece high-speed steel drill bit set with 135-degree split points for reduced walking in metal

  • TypeDrill Bits
  • 29-piece set covers a wide range of fractional sizes
  • 135° split point reduces walking and starts holes accurately
  • High-speed steel construction withstands heavy-duty drilling demands
  • Black oxide finish adds corrosion resistance and durability
  • Screw machine length suits portable and stationary drilling applications

Chicago-Latrobe 57719 29-piece drill set

The Chicago-Latrobe 57719 set supplies 29 fractional-inch bits from 1/16 in to 1/2 in for production drilling. Each bit is high-speed steel with a black oxide finish and a 135-degree split point for accurate starting.

Metalworkers needing a full fractional range

Buyers who require metric sizes, extra-long aircraft bits or coated cutters for abrasive alloys should look at something else. This set is built for standard fractional-inch screw-machine applications.

Check your chuck capacity and tool holder reach

Verify the largest bit at 1/2 in fits your chuck and that the screw-machine length suits your spindle travel. Ensure the 135-degree point angle matches the material you plan to drill.

Highlights

  • 29-piece set covers a wide range of fractional sizes
  • 135° split point reduces walking and starts holes accurately
  • High-speed steel construction withstands heavy-duty drilling demands
  • Black oxide finish adds corrosion resistance and durability
  • Screw machine length suits portable and stationary drilling applications

Specifications

BrandCHICAGO-LATROBE
TypeDrill Bits

Questions about this item

Will the 135-degree split-point bits in this 29-piece set fit the 1/2-inch chuck on my existing drill?

The set includes sizes up to 1/2 inch, so the largest bits match a standard 1/2-inch chuck capacity; smaller sizes down to 1/16 inch will also seat securely.

Can I use these high-speed steel bits in the same corded drill where I previously ran cobalt bits?

Yes, the black-oxide high-speed steel bits are designed for standard portable and stationary drills, so they work in the same tool without modification.

How can I verify the 135-degree split point is performing correctly after the first few holes?

A properly functioning split point will self-centre on contact, produce short curled chips in steel, and leave a clean round hole without wandering or excessive heat buildup.

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