Drill America
Drill America Cobalt Heavy Duty Split Point Stub Drill Bit 49/64in
Cobalt stub drill bit sized 49/64in with 135-degree split point for self-centering drilling in iron and steel
- TypeDrill Accessories
- Aerospace Standard 907 manufacturing ensures reliable performance
- 135 degree split point self-centers and reduces thrust
- Short rugged construction handles iron and steel families
- Suited for automotive and construction screw machine setups
- California Proposition 65 warnings for cancer and reproductive harm
Application & User
Drill America Cobalt Heavy Duty Split Point Stub Drill Bit 49/64in is built for portable or machine drilling where spindle clearance is limited. It serves automotive and construction professionals who need short, rugged tooling for screw-machine setups. The 135 degree split point is self-centering and reduces thrust, making it suitable for a broad range of iron and steel materials. This bit meets Aerospace Standard 907 for demanding production environments.
Sustained Load Behaviour
Short, rugged construction resists deflection during extended drilling cycles in tough alloys. The cobalt substrate maintains hardness at elevated temperatures generated by continuous cutting. Split-point geometry minimises walking and keeps thrust forces low, reducing operator fatigue and machine wear over long runs. Performance stays consistent across repetitive holes in ferrous workpieces.
Practical Limits
The 135 degree split point applies to this 49/64in size; smaller than 1/16in and larger than 1/2in sizes revert to a 118 degree standard point. California Proposition 65 warnings note the presence of chemicals known to cause cancer and birth defects or other reproductive harm. Aerospace Standard 907 defines the manufacturing envelope for these screw machine drills. No other interface or compatibility constraints are specified.
Highlights
- Aerospace Standard 907 manufacturing ensures reliable performance
- 135 degree split point self-centers and reduces thrust
- Short rugged construction handles iron and steel families
- Suited for automotive and construction screw machine setups
- California Proposition 65 warnings for cancer and reproductive harm
Specifications
| Brand | Drill America |
|---|---|
| Type | Drill Accessories |
Questions about this item
Does the 135-degree split point reduce heat when drilling steel all day?
The 135-degree split point is self-centering and reduces thrust, which lowers cutting force and heat buildup during extended drilling in iron and steel families.
What chuck size is needed to hold the 49/64in shank?
A drill chuck with at least 49/64in capacity is required to secure the stub-length shank on portable or machine tools.
Will the 118-degree point on larger sizes match my older 1/2in cobalt bits?
Sizes larger than 1/2in use the 118-degree standard point, so this 49/64in bit shares the same point geometry as your existing 1/2in cobalt drills.
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