Drill America
Drill America 63/64in Cobalt Heavy Duty Split Point Stub Drill Bit pneumatic accessory
Cobalt stub drill bit, 63/64 inch, with 135-degree split point for self-centering drilling in iron and steel
- TypeDrill Accessories
- Self-centering 135° split point cuts thrust
- Cobalt construction handles iron and steel families
- Manufactured to Aerospace Standard 907
- Short rugged build suits limited spindle clearance
- 118° standard point on sizes outside 1/16–1/2
63/64in Cobalt Stub Drill Bit
This cobalt heavy-duty stub drill bit is built for portable or machine drilling in iron and steel families. It meets Aerospace Standard 907 for screw machine applications where spindle clearance is limited. Automotive and construction professionals use it for short, rigid drilling tasks.
135-degree split point and size limits
The 135-degree split point is self-centering and reduces thrust for easier starts in tough alloys. Sizes smaller than 1/16in and larger than 1/2in revert to a 118-degree standard point, so this bit uses the split-point geometry. It handles short-run production and maintenance drilling where stub length is required.
Cobalt construction and Proposition 65 notice
Cobalt alloy construction provides the hardness and heat resistance needed for repeated drilling in steel. The product carries a California Proposition 65 warning for chemicals known to cause cancer and reproductive harm. The rugged, compact design suits screw machine setups and tight-access work.
Highlights
- Self-centering 135° split point cuts thrust
- Cobalt construction handles iron and steel families
- Manufactured to Aerospace Standard 907
- Short rugged build suits limited spindle clearance
- 118° standard point on sizes outside 1/16–1/2
Specifications
| Brand | Drill America |
|---|---|
| Type | Drill Accessories |
Questions about this item
Will the 63/64in cobalt stub bit fit the chuck on my older pneumatic drill motor?
The bit has a 63/64in cutting diameter and a shorter shank typical of stub drills; check that your chuck capacity covers this size and that the reduced length clears your spindle.
How can I verify the 135 degree split point is centering correctly on first use?
Start the drill at low speed; the split point should bite immediately without a centre punch and produce a clean, centred hole with minimal pressure.
Does the package include any lubricant or only the single cobalt bit?
Only the cobalt heavy-duty stub drill bit is supplied; cutting fluid or paste must be purchased separately.
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