Drill America
Drill America Cobalt Aircraft Extension Drill Bit 3/16in x 12in
Cobalt steel aircraft extension bit drills 3/16 inch holes at 12 inch reach with split-point precision
- TypeDrill Accessories
- 3/16-inch cobalt bit drills hard alloys with heat-resistant steel
- Split-point tip starts on contact without centre-punching
- 12-inch overall length reaches deep or confined holes
- 1875-inch decimal size matches precise engineering specs
3/16in 12in Cobalt Aircraft Extension Bit
This cobalt aircraft extension drill bit measures 3/16in in diameter with a 12in overall length and a flute length of 2-5/16in. It is made from cobalt steel and features a heavy-duty split point for accurate starting. The decimal equivalent of the size is .1875.
Suited for deep-hole drilling in tough metals
The extended length and cobalt construction suit users drilling deep holes in stainless steel, titanium and other hard alloys where heat resistance matters. Builders who need a shorter bit for confined spaces or a different diameter for other hole sizes should look at other options.
Highlights
- 3/16-inch cobalt bit drills hard alloys with heat-resistant steel
- Split-point tip starts on contact without centre-punching
- 12-inch overall length reaches deep or confined holes
- 1875-inch decimal size matches precise engineering specs
Specifications
| Brand | Drill America |
|---|---|
| Type | Drill Accessories |
Questions about this item
How does the .1875 decimal size translate when the bit is in a real machine?
The .1875 decimal equivalent matches a standard 3/16 inch drill chuck, so the bit seats securely in any drill that accepts that shaft diameter.
What does the 12 inch overall length cap in practice when drilling deep holes?
The 12 inch overall length allows reach into deep cavities, while the 2-5/16 flute length limits the continuous chip clearance depth per plunge.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
