Drill America
Drill America 9/16 in Cobalt Split Point Stub Drill Bit
9/16 inch cobalt stub drill bit with 135-degree split point for self-centering drilling in iron and steel
- TypeDrill Accessories
- Self-centering 135° split point reduces drilling thrust
- Manufactured to Aerospace Standard 907 for consistent quality
- Short rugged construction handles iron and steel alloys
- Stub length suits limited spindle clearance setups
- Cobalt steel withstands high heat in repetitive drilling
9/16 in Cobalt Split Point Stub Drill Bit
This 9/16 inch cobalt drill bit is built to Aerospace Standard 907 for heavy-duty drilling in iron and steel. The short, rugged stub length suits portable and machine use where spindle clearance is limited. It is designed for automotive and construction professionals who need a durable tool for screw machine setups. The 135 degree split point is self-centering and reduces thrust during operation.
Capacity and headroom in tough materials
The cobalt construction handles a broad range of ferrous materials with high wear resistance. The 135 degree split point provides reliable centering and lower thrust on this 9/16 inch diameter. Bits smaller than 1/16 inch or larger than 1/2 inch switch to a 118 degree standard point, so this size sits at the upper end of the split-point range. It is not intended for non-ferrous metals or wood where different geometry performs better.
Upgrading from general-purpose bits
This bit replaces standard high-speed steel stub drills when drilling hardened steel or high-volume production runs. The cobalt alloy and split point geometry extend tool life and improve hole accuracy in difficult alloys. The upgrade is worth it when spindle space is tight and the material demands the heat resistance of cobalt. It does not suit applications requiring longer flute lengths or deeper hole drilling.
Highlights
- Self-centering 135° split point reduces drilling thrust
- Manufactured to Aerospace Standard 907 for consistent quality
- Short rugged construction handles iron and steel alloys
- Stub length suits limited spindle clearance setups
- Cobalt steel withstands high heat in repetitive drilling
Specifications
| Brand | Drill America |
|---|---|
| Type | Drill Accessories |
Questions about this item
Will the 135 degree split point centre itself in a pre-drilled pilot hole without wandering?
The 135 degree split point is self-centering, so it starts on contact and reduces thrust when entering an existing pilot hole.
How can I confirm the bit meets the Aerospace Standard 907 specification once I receive it?
The drill is manufactured to Aerospace Standard 907; the marking on the shank identifies the standard and the cobalt construction.
Does the package include any cutting fluid or a storage case, or must I buy those separately?
The box contains the single cobalt stub drill bit only; cutting fluid and a storage case are not included and must be purchased separately.
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