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Your cart is empty.Made of heat resistant cobalt and ground to a heavy duty 135° split point. Common flute and overall length for minimal adjustment during tool changes. Precision ground for high degree of concentricity between shank and body diameter. Ideal for drilling in tough, high tensile strength materials. Expands the size range capacity of a portable drill chuck. Common flute and overall length for minimal adjustment during tool changes. Precision ground for high degree of concentricity between shank and body diameter. Ideal for drilling in low and medium tensile strength materials.
Luis b.
Reviewed in Mexico on March 6, 2025
Incompleto
Cap'nR
Reviewed in the United States on July 22, 2023
I was hesitant to buy a brand I wasn't familiar with, but this is one great drill. Went through the stainless I bought it for like butter. I can't testify to its long range durability as I probably won't use it much, but it did the job it was intended for very well.
Customer
Reviewed in Canada on July 18, 2023
This 5/8 inch bit is NOT M42 COBALT! It's M35! Therfore these bits are over-priced. So 2 stars lost for being inferred in the product description. See my photos of the packaging that clearly states it's M35 Cobalt.Also, The manufacturer's crappy sharpening left heavy burrs on the cutting edges... but I could easily repair this issue myself.On the positive side, it cuts very well in Aluminum but I haven't yet tried Stainless-Steel or hardened steel alloys. Also the bit is perfectly straight (zero run-out) and dead on 5/8".
Rob Stavis
Reviewed in the United States on June 24, 2023
The Drill America 5/8" High Speed Steel Black & Gold KFD Drill Bit could not enlarge an existing 1/2 inch hole in a 1/4 inch thick piece of corten steel and the point was destroyed in trying. This D/ACO Series Cobalt Drill Bit (at twice the price) did the job.
roy holzhauser
Reviewed in the United States on June 14, 2023
it's a good drill bit for the money. it works good.
Leonardo P
Reviewed in Mexico on November 20, 2023
Se quebró la broca
ratflinger
Reviewed in the United States on September 10, 2022
Bought a cheaper bit 1st - it failed immediately so I ordered this bit from Drill America. This bit drilled the 16 holes I needed and was still going strong at the end. Drill America bits stand up to the test.
R. Kelley
Reviewed in the United States on June 30, 2022
Do not buy this incredibly bad drill bit. Bought it to drill a large hole in 1/4” mild steel plate after 10 minutes of drilling the bit did not begin to drill through plate. I drilled a 3/8” starter hole with a bit from Walmart and then tried this bit again but it did nothing. Total waste of my money for Avery expensive piece of junk!
GSD
Reviewed in the United States on April 24, 2022
Ok, maybe not the noggin! But for drilling steel this bit worked as a cobalt bit should. No issues, and it cut fast. Drilled through 1/4 plate steel pretty quickly using a 20 volt cordless drill. Quality seems good and was cheaper than big brand names. Like the reduced shank so i could use in 1/2" drill. Nothing worse then having a bunch of drill bits with the size worn off from slippage, so pick up a couple.
Mr. Geweke
Reviewed in the United States on December 18, 2021
Lasted about 2 hours of use against hardened steel before starting to dull.Would last a lot longer against mild steel and even longer with soft metals.
Richard
Reviewed in Canada on June 2, 2019
As expected, fast delivery!
BrianS
Reviewed in the United States on October 14, 2019
Used this to drill 18 holes in 1/4" thick A36 steel. I did not use a pilot hole or any pre-drilled hole. I used the cutting fluid and stopped 6 to 8 times per hole to add the cutting fluid. The last hole still drilled fine. Don't know how many more holes the bit has left but this was all I needed for the project. The diameter of bit and hole was right on .687". This is a quality tool. Thanks
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