Drill America
Drill America 5/8in Cobalt Split Point Stub Drill Bit
Cobalt stub drill bit with 135-degree split point for self-centering drilling in iron and steel, 5/8in size
- TypeDrill Accessories
- Self-centering 135° split point reduces thrust
- Manufactured to Aerospace Standard 907 for precision
- Short rugged construction handles iron and steel
- Stub length suits limited spindle clearance
- California Proposition 65 warning applies
5/8in Cobalt Stub Drill Bit
This 5/8in cobalt stub drill bit is built to Aerospace Standard 907 for heavy-duty use. The 135 degree split point is self-centering and reduces thrust during drilling. Its short, rugged construction suits portable or machine drilling in iron and steel families. Automotive and construction professionals often choose it where spindle clearance is limited.
Upgrade from standard jobber bits
The stub length replaces longer jobber drills when spindle clearance is tight or rigidity is critical. The 135 degree split point upgrades the 118 degree standard point found on larger sizes for faster centering and less walking. Cobalt material upgrades high-speed steel for better heat resistance in tough alloys. The jump is worth it for repetitive screw-machine setups and hard-metal drilling.
Suits screw-machine and tight-clearance work
Mechanics and fabricators running screw machines or drilling in confined spaces will benefit from the short length and split point. Buyers who need deeper hole capacity should look at longer drill bits. Users drilling primarily in wood, plastic or soft non-ferrous metals do not need this cobalt construction. The Proposition 65 notice applies for California compliance.
Highlights
- Self-centering 135° split point reduces thrust
- Manufactured to Aerospace Standard 907 for precision
- Short rugged construction handles iron and steel
- Stub length suits limited spindle clearance
- California Proposition 65 warning applies
Specifications
| Brand | Drill America |
|---|---|
| Type | Drill Accessories |
Questions about this item
What shank size does the 5/8in cobalt stub drill bit need to fit my drill chuck?
The bit has a 5/8in diameter shank, so the chuck must open at least that wide to hold it securely.
How do I start the 135-degree split point correctly without the bit walking?
Apply firm, steady pressure at the start; the self-centering 135-degree split point eliminates the need for a centre punch or pilot hole.
When should I replace the cobalt stub drill bit?
Replace it when the cutting lips become rounded or chipped, or when drilling force increases noticeably in steel and iron materials.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
