Dormer 1/2” Parallel Shank Drill Bit ( No. A-170 )

HIGHLIGHTS:

We sell only Original Dormer cutting tools — trusted worldwide for their precision, durability, and consistent manufacturing quality. The Dormer 1/2" Parallel Shank Drill Bit (No. A-170), often referred to as a Blacksmith Drill, is a reduced shank drill designed for drilling large-diameter holes using a standard drill chuck. Featuring a 1/2" parallel shank with a standard helix and right-hand spiral, it is a general-purpose drill ideal for a wide range of materials where chuck holding capacity is limited.

This high-quality general-purpose reduced shank drill is ideal for a wide range of materials where chuck holding capacity is limited — allowing drill bits with cutting diameters significantly larger than a standard chuck can hold to still be used in the same machine, since the reduced 1/2" parallel shank fits the chuck while the cutting head extends to a larger diameter. Made from HSS with a 118° point angle and a steam tempered finish, the A-170 delivers reliable performance for general metalworking drilling tasks.

Available across a wide range of sizes, the A-170 series allows machinists, fabricators, and workshop users to drill large holes without needing to invest in a chuck or drill press capable of holding a larger shank diameter.

FEATURES:

• Original Dormer Product – Guaranteed genuine Dormer tool, manufactured to the brand's exacting quality and precision standards.
• 1/2" Parallel (Reduced) Shank – Allows large-diameter drill bits to be used in standard drill chucks with limited holding capacity.
• HSS Construction – Durable high speed steel material suitable for drilling a wide range of materials.
• 118° Point Angle – Standard general-purpose point angle for everyday drilling applications.
• Right-Hand Spiral, Standard Helix – Reliable, consistent cutting action during drilling operations.
• Steam Tempered Finish – Surface treatment that improves heat resistance and reduces friction during drilling.
• Wide Size Range – Available across multiple large diameters to suit different drilling requirements.

APPLICATIONS:

• Drilling large-diameter holes in metal where chuck capacity is limited
• General metalworking and fabrication drilling tasks
• Workshop and maintenance drilling applications
• Use in standard drill chucks and drill presses with limited holding capacity