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Cobalt stub drill bit, 13/16 inch, split point tip, matte gold finish

Drill America

Drill America 13/16in Cobalt Split Point Stub Drill Bit

SKU CH-A5E4-Q5ERS

A cobalt stub drill bit with a 135-degree split point for self-centering and reduced thrust in iron and steel

  • Product typeDrill Accessories
  • 135-degree split point self-centres for accurate starts
  • Cobalt alloy withstands heat in tough steel drilling
  • Manufactured to Aerospace Standard 907 for reliability
  • Short stub length fits tight spindle clearances
  • Broad material range covers iron and steel families

13/16in Cobalt Split Point Stub Drill Bit

This 13/16in cobalt drill bit meets Aerospace Standard 907 for screw machine use. The short, rugged construction suits portable or machine drilling in iron and steel families. A 135 degree split point is self-centering and reduces thrust during operation. It is popular in automotive and construction industries where spindle clearance is limited.

Who this suits and who should look elsewhere

Machinists and technicians drilling shallow holes in ferrous alloys with restricted spindle access will benefit from the stub length and split point geometry. Buyers who need deeper hole capacity or a standard 118 degree point for general-purpose drilling in softer materials should consider a different bit style.

135 degree split point on 13/16in diameter

The 135 degree split point centers the cut without a pilot hole and lowers feed pressure on tough alloys. This geometry is the primary factor that determines whether the bit matches the material hardness and machine rigidity of the application.

How it compares

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

Price $53.99
Pricier than about 69% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDrill America
Product typeDrill Accessories

Questions about this item

Will the 13/16in cobalt stub bit fit the chuck on my older 1/2in drill press?

The 13/16in diameter exceeds a 1/2in chuck capacity, so it will not fit; you need a larger chuck or a bit with a reduced shank.

How can I confirm the 135 degree split point is self-centering when I start a hole?

The 135 degree split point centres itself on contact and requires less thrust, so the bit will not walk on steel or iron surfaces.

Does the package include any cutting fluid or a case for the 13/16in stub drill?

The supplier description lists only the cobalt stub drill bit manufactured to Aerospace Standard 907; no fluid or case is mentioned.

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