





55/64 – Reduced Shank Drill Bit With Flatted Shank – 6″ Overall Length – 3″ Flute Length
$124.19
Discover the 55/64- (303Cf) Reduced Shank Drill Bit, engineered for precision and efficiency in drilling tasks. With a 135-degree notched point, 3-inch flute length, and 6-inch overall length, this cobalt drill bit offers smooth, accurate drilling and excellent reach. Its 1/2-inch flatted shank ensures a secure grip, minimizing slippage. Made in the USA with premium materials, this Silver & Deming drill bit is built to last. Upgrade your toolkit today!
- Description
- Additional information
- FAQ's
Description
Introducing the 55/64 – Reduced Shank Drill Bit With Flatted Shank – 6″ Overall Length – 3″ Flute Length, a cutting-edge tool designed for precision and efficiency in all your drilling tasks. This cobalt drill bit features a 135-degree notched point and a 3-inch flute length, ensuring smooth and accurate drilling every time. With a 6-inch overall length, it offers excellent reach and versatility, while the 1/2-inch flatted shank provides a secure grip to minimize slippage. Proudly made in the USA with top-quality materials, this Silver & Deming drill bit is built to last. Upgrade your drilling game with the 55/64 – Reduced Shank Drill Bit today!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 | Flatted |
Size Type | Fractional |
FAQ's: Reduced Shank Drills
Can I use a reduced shank drill bit for wood or plastic?
admin2025-08-10T14:09:58+00:00Yes — HSS reduced shank bits work well in wood and plastic, but ensure proper feed rates to avoid overheating or chipping.
What industries use reduced shank drill bits?
admin2025-08-10T14:09:20+00:00Common in construction, fabrication, maintenance, automotive repair, and industrial metalworking.
Are there coating options for reduced shank drills?
admin2025-08-10T14:08:34+00:00Yes — options include black oxide for corrosion resistance, TiN (titanium nitride) for wear resistance, and uncoated for general use.
Can reduced shank drill bits be used in impact drivers?
admin2025-08-10T14:03:24+00:00No — they’re not designed for the percussive action of impact drivers. Use in drills and drill presses.
What’s the lifespan difference between HSS and cobalt reduced shank bits?
admin2025-08-10T14:03:03+00:00Cobalt bits can last 2–4 times longer in hard metals compared to HSS, assuming proper use and cooling.
Do I need lubrication when drilling with reduced shank bits?
admin2025-08-10T14:02:40+00:00Yes, especially in metals. Cutting oil reduces heat, prevents premature dulling, and extends bit life.
What’s the maximum hole size I can drill with a reduced shank bit?
admin2025-08-10T14:02:10+00:00It depends on the bit — reduced shank designs can go up to 1-1/2" cutting diameter for a 1/2" shank.
Can you sharpen reduced shank drill bits?
admin2025-08-10T14:01:39+00:00Yes — they can be sharpened on a bench grinder or with a drill bit sharpener, following the correct cutting angle.
Are cobalt reduced shank bits more brittle?
admin2025-08-10T14:01:17+00:00Cobalt is harder and more heat resistant but slightly more brittle than HSS, so avoid side pressure to prevent chipping.
Do reduced shank drills come in different sizes?
admin2025-08-10T14:00:29+00:00Yes — common reduced shank sizes include 1/2" and 3/8" shanks, with cutting diameters much larger than the shank.
Can you use reduced shank drills in a hand drill?
admin2025-08-10T13:59:47+00:00Yes — they’re designed to fit standard drill chucks, including handheld drills, drill presses, and magnetic drills.
Which is better, HSS or cobalt reduced shank drills?
admin2025-08-10T13:59:14+00:00For 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.
What’s the difference between HSS and cobalt reduced shank drill bits?
admin2025-08-10T13:58:42+00:00HSS 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.
Why use a reduced shank drill bit?
admin2025-08-10T13:58:02+00:00It 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.
What is a reduced shank drill bit?
admin2025-08-10T13:57:37+00:00A 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.