Drill America Cobalt Heavy Duty Split Point Stub Drill Bit 49/64in

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.