Drill America
Drill America D/AN39/64 39/64in HSS Black Oxide Jobber Drill Bit pneumatic accessory
A 39/64-inch high-speed steel jobber drill bit with black oxide coating for general-purpose drilling
- TypeDrill Accessories
- 39/64 inch diameter drills large holes accurately
- HSS steel resists heat during extended drilling
- Black oxide finish reduces friction and wear
- Jobber length 7-1/8 inch reaches deep workpieces
39/64in HSS Jobber Drill Bit
The Drill America D/AN39/64 is a high-speed steel jobber length drill bit with a black oxide surface treatment. It is designed for general-purpose drilling in metal, wood, and plastic for professional and DIY users. The bit features a 39/64 inch diameter with a decimal equivalent of .6094.
Flute length 5-3/16in overall 7-1/8in
The flute length measures 5-3/16 inches and the overall length is 7-1/8 inches. The black oxide finish helps reduce friction and improves chip flow during operation. This accessory suits pneumatic and power drill applications requiring this specific size.
Highlights
- 39/64 inch diameter drills large holes accurately
- HSS steel resists heat during extended drilling
- Black oxide finish reduces friction and wear
- Jobber length 7-1/8 inch reaches deep workpieces
Specifications
| Brand | Drill America |
|---|---|
| Model | D/AN39/64 |
| Type | Drill Accessories |
Questions about this item
How do I install the 39/64in HSS jobber drill bit in a pneumatic drill chuck without damaging the shank?
Open the chuck fully, insert the straight shank until it seats against the jaws, then tighten evenly using the chuck key or sleeve; the step most people skip is verifying the bit runs true before applying full pneumatic pressure.
When will the black-oxide coating on this 39/64in bit need replacement, and what indicates it is worn?
The coating wears gradually; replace the bit when the cutting edges no longer produce clean chips in steel or when the flute shows visible rounding, typically after drilling multiple holes at the rated 39/64 diameter.
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