Drill America
Drill America Cobalt Heavy Duty Split Point Stub Drill Bit 47/64in
Cobalt stub drill bit with 135-degree split point for self-centering drilling in iron and steel, sized 47/64in
- TypeDrill Accessories
- Cobalt construction withstands high heat in iron and steel
- 135 degree split point self-centres and cuts thrust
- Aerospace Standard 907 manufacturing ensures consistent quality
- Short stub length fits tight spindle clearance setups
- Designed for portable or machine drilling versatility
Cobalt Heavy Duty Stub Drill Bit
The Drill America Cobalt Heavy Duty Split Point Stub Drill Bit is a new power tool accessory designed for drilling in iron and steel families. It suits automotive and construction professionals who need a short, rugged bit for portable or machine drilling where spindle clearance is limited. The cobalt construction provides durability across a broad range of materials.
135 Degree Split Point Self-Centering
The single specification that decides fit is the 135 degree split point, which is self-centering and reduces thrust during operation. This geometry allows the bit to start accurately without wandering, making it the correct choice for precise screw machine setups. Bits smaller than 1/16 inch or larger than 1/2 inch use a 118 degree standard point instead.
47/64 Inch Capacity Aerospace Standard 907
Manufactured to Aerospace Standard 907, this 47/64 inch bit comfortably handles screw machine drilling tasks in tough alloys where short length adds rigidity. It runs out when a job requires a longer flute length or a diameter outside the stub drill range, as the short construction limits reach in deeper holes.
Highlights
- Cobalt construction withstands high heat in iron and steel
- 135 degree split point self-centres and cuts thrust
- Aerospace Standard 907 manufacturing ensures consistent quality
- Short stub length fits tight spindle clearance setups
- Designed for portable or machine drilling versatility
Specifications
| Brand | Drill America |
|---|---|
| Type | Drill Accessories |
Questions about this item
How does the 135 degree split point help when the bit is in the drill?
The 135 degree split point is self-centering and reduces thrust, making it easier to start holes accurately in iron and steel without a centre punch.
What does the Aerospace Standard 907 designation mean for this stub drill?
It confirms the bit is manufactured to a recognised aerospace specification for screw machine drills, ensuring consistent geometry and material quality for demanding applications.
What shank size does the 47/64 inch bit need to fit my drill chuck?
The bit is a screw machine stub drill, so its shank diameter matches the 47/64 inch drill diameter and requires a chuck capacity of at least that size.
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