Drill America
Drill America 17/64in x 12in Cobalt Aircraft Extension Drill Bit pneumatic accessory
A 12-inch cobalt aircraft extension drill bit with a 17/64-inch diameter and split-point tip for heavy-duty drilling
- TypeDrill Accessories
- Cobalt steel resists heat and wear during heavy-duty drilling
- 12-inch overall length reaches deep or confined work areas
- Split-point tip reduces walking and starts holes precisely
- 17/64 inch diameter matches specific fastener and clearance requirements
Drill America 17/64in Cobalt Extension Bit
This 12-inch cobalt aircraft extension drill bit is designed for deep-hole drilling in hard metals. The heavy-duty split point reduces walking and starts cleanly on contact. Cobalt steel construction resists heat and wear during extended use. It suits mechanics and fabricators who need reach beyond standard jobber lengths.
Replaces shorter bits when depth
Standard-length bits cannot reach the full 12-inch overall length this tool provides. The cobalt alloy outperforms high-speed steel in stainless steel and other tough alloys. The jump is worth it when flute length of 2-7/8 inches and the decimal equivalent of .2656 match the hole specification. It is not for buyers who need a shorter bit or a different diameter.
Highlights
- Cobalt steel resists heat and wear during heavy-duty drilling
- 12-inch overall length reaches deep or confined work areas
- Split-point tip reduces walking and starts holes precisely
- 17/64 inch diameter matches specific fastener and clearance requirements
Specifications
| Brand | Drill America |
|---|---|
| Type | Drill Accessories |
Questions about this item
What chuck size is needed for the 17/64 inch shank?
A chuck that opens to at least 17/64 inch (0.2656 inch decimal) will hold the bit.
How do you start the hole so the 12 inch bit does not walk?
Use a centre punch mark, then apply steady pressure while keeping the drill perpendicular to the workpiece.
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