55/64 – Reduced Shank Drill Bit – 6″ Overall Length – 3″ Flute Length

$117.29

Discover the 55/64 – Reduced Shank Drills, engineered for precision and durability with a 135-degree notched point and cobalt construction. These drill bits offer a 3″ flute length and 6″ overall length for optimal reach, with a 1/2″ standard shank for wide compatibility. Perfect for professionals and DIY enthusiasts, upgrade your toolbox with these reliable, high-performance drills today.

Description

55/64 – Reduced Shank Drill Bit – 6″ Overall Length – 3″ Flute Length | Introducing the 55/64 – Reduced Shank Drill Bit, the ultimate cutting tool designed to meet all your drilling needs with precision and durability. Crafted with a 135-degree notched point and robust cobalt construction, this drill bit ensures exceptional performance. Featuring a 3″ flute length and a 6″ overall length, it provides optimal reach and efficiency, while the 1/2″ standard shank guarantees compatibility with a wide range of drilling machines. Ideal for both professional contractors and DIY enthusiasts, the 55/64 – Reduced Shank Drill Bit promises outstanding reliability and performance. Upgrade your toolbox today with this top-quality product and experience the difference in your drilling projects.

Additional information

Weight 1 lbs
Dimensions 6 × 1 × 1 in
Diameter Size

55/64

For Use On

Metal, Plastics, Wood

Material

Cobalt

Flute Length

3

Overall Length

6

Point

135 Degree Notched

Shank Type

Standard

Size Type

Fractional

FAQ's: Reduced Shank Drills

Yes — HSS reduced shank bits work well in wood and plastic, but ensure proper feed rates to avoid overheating or chipping.

Common in construction, fabrication, maintenance, automotive repair, and industrial metalworking.

Yes — options include black oxide for corrosion resistance, TiN (titanium nitride) for wear resistance, and uncoated for general use.

No — they’re not designed for the percussive action of impact drivers. Use in drills and drill presses.

Cobalt bits can last 2–4 times longer in hard metals compared to HSS, assuming proper use and cooling.

Yes, especially in metals. Cutting oil reduces heat, prevents premature dulling, and extends bit life.

It depends on the bit — reduced shank designs can go up to 1-1/2" cutting diameter for a 1/2" shank.

Yes — they can be sharpened on a bench grinder or with a drill bit sharpener, following the correct cutting angle.

Cobalt is harder and more heat resistant but slightly more brittle than HSS, so avoid side pressure to prevent chipping.

Yes — common reduced shank sizes include 1/2" and 3/8" shanks, with cutting diameters much larger than the shank.

Yes — they’re designed to fit standard drill chucks, including handheld drills, drill presses, and magnetic drills.

For mild steel, aluminum, and wood, HSS is economical and effective. For stainless steel, hardened steel, and other high-tensile metals, cobalt will last longer and cut more efficiently.

HSS bits are made from high-speed steel for general-purpose drilling in softer metals, wood, and plastics. Cobalt bits contain 5–8% cobalt for added hardness and heat resistance, making them better for stainless steel and other hard alloys.

It lets you drill larger holes without needing a drill with a bigger chuck size — for example, a 3/4" bit with a 1/2" shank fits a standard 1/2" drill.

A reduced shank drill bit has a smaller shank diameter than the cutting diameter, allowing large-diameter holes to be drilled in drills with smaller chucks.

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