Drillco 7/8" Extra Length Drill 18" OAL 1/2" Shank (1318AR156)
Drillco 1318AR156 7/8" Extra Length Drill 18" OAL 1/2" Shank is engineered for deep hole drilling in heavy-duty applications where extended reach and accuracy are essential. With an 18-inch overall length and general-purpose spiral flute geometry, this drill bit delivers reliable chip evacuation and consistent performance across a wide range of materials. The 1/2" reduced shank ensures compatibility with standard drill chucks, while the hex nut design also allows secure attachment to impact wrenches. The Drillco 1318AR156 is made from high-speed steel (HSS) for excellent strength and durability. It features Neo40 magnets in the shank to help prevent the reamer from falling out of the socket and a tapered point for easy hole realignment. This USA-made drill bit is ideal for deep hole drilling in structural, fabrication, and industrial operations.
Premium high-speed steel (HSS) construction enhances wear resistance and strength
General-purpose spiral flute design ensures smooth chip removal in deep drilling
1/2" reduced shank enables use with standard drill chucks and handheld tools
Hex nut shank allows compatibility with impact wrenches
Tapered point ensures accurate realignment of previously drilled holes
Neo40 magnets in the shank prevent the reamer from falling out of the socket
Bridge length supports deeper drilling in thicker workpieces
Perfect for deep hole drilling in structural steel and fabrication environments
Improves chip flow and reduces downtime caused by clogging
Compatible with a wide range of tools due to its reduced shank and hex nut design
Magnetized shank offers extra security during high-torque drilling operations
Technical Specifications:
Model: 1318AR156
Overall Length: 18"
Flute Design: General purpose, spiral flutes
Point Type: Tapered point
Material: High-speed steel (HSS)
Shank Type: 1/2" reduced shank with hex nut and Neo40 magnets
Origin: Made in USA
Application: Deep hole drilling in long or thick metal workpieces
Product identification
- Brand: Drillco
- Model / MPN: 1318AR156





