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Super Duty Drill Bits

Super Duty Drill Bits

If you’re looking for looking for dependable, long lasting, and fast cutting super duty drill bits, you’re have come to the right place. The high quality super duty drill bits that we keep in stock are made in the United States out of high-speed molybdenum steel. The cutting edge on these drill bits is extremely sharp, like you would find on titanium-coated bits, but since there is no coating to wear off, they keep their sharp edge for a longer time.

The quality of your drill bit comes from the metal it is made of. By using bits made of the best metal, you will in return get the best results. Although coated bits will produce excellent results, these results are limited, once the bits coating wears off, your left with a low quality steel bit that will not hold a sharp edge for long. The super duty bits we keep in stock are made of solid molybdenum steel, so there’s no coating to wear off. If one of these super duty drill bits becomes dull, sharpening the drill bit will allow it to perform like it did when you first purchased it.

Standard steel doesn’t have the heat tolerance or durability that is required to perform high-speed drilling applications. For these applications there are special alloy blends that give the steel specific enhanced properties that are required to stand up to the high demands of high-speed drilling. By adding molybdenum to steel, it becomes tougher and more resistant to abrasion than normal steel. This alloy also provides more flexibility and the ability to keep a sharp edge when the drill bit becomes red-hot, making them perfect for commercial and industrial drilling applications.

Molybdenum steel, also known as moly is a silvery white metal that has a Mohs hardness of 5.5 and a melting point of 4,753 degrees Fahrenheit (2,623 degrees Celsius). Only rhenium, tungsten, carbon, osmium, and tantalum have higher melting points. Moly’s ability to withstand this extreme temperature range without becoming soft or expanding makes it an ideal material for use in high-speed drilling applications where a lot of heat is created.

At DeFusco Industrial Supply we keep a wide selection of super duty drill bits in many sizes. If you don’t see a drill bit in the size you are looking for on our site, contact us by phone or email and we will locate the drill bit in the size you are looking for. We are always here to help you get the best tools at the absolute lowest possible prices.



1/16 Inch Super Duty Bit

1/16 Inch Super Duty Bit

$1.69
5/64 Inch Super Duty Bit

5/64 Inch Super Duty Bit

$1.74
3/32 Inch Super Duty Bit

3/32 Inch Super Duty Bit

$1.79
7/64 Inch Super Duty Bit

7/64 Inch Super Duty Bit

$1.84
1/8 Inch Super Duty Bit

1/8 Inch Super Duty Bit

$1.99
9/64 Inch Super Duty Bit

9/64 Inch Super Duty Bit

$2.19
5/32 Inch Super Duty Bit

5/32 Inch Super Duty Bit

$2.29
11/64 Inch Super Duty Bit

11/64 Inch Super Duty Bit

$2.39
3/16 Inch Super Duty Bit

3/16 Inch Super Duty Bit

$2.79
1/4 Inch Super Duty Bit

1/4 Inch Super Duty Bit

$3.69
5/16 Inch Super Duty Bit

5/16 Inch Super Duty Bit

$5.69
3/8 Inch Super Duty Bit

3/8 Inch Super Duty Bit

$8.19
1/2 Inch Super Duty Bit

1/2 Inch Super Duty Bit

$14.90
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