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STROTON 4-32mm/15steps 5% Cobalt Step Drill Bit for Stainless Steel, Hard Metal.
Why Choose STROTON Cobalt Step Drill Bit?
The research shows that HSS with cobalt has higher temperature resistance, Red hardness, greater wear resistance and higher heat treat response than HSS without cobalt .
- The "Cobalt" from STROTON ,Add enough rare metals from STROTON to ensure the quality.
- This step drill bit is made of Premium Cobalt (80,000 dollars per ton).
- This step drill bit works in materials such as sheet metal, ducts, steel, copper, brass, aluminum, plastic, vinyl siding, plasterboard, PVC, stainless steel and cast iron.
ALESSANDRO 0481
Reviewed in Italy on January 28, 2025
Ho acquistato questo articolo, per allargare un foro, eseguito con una punta da 13 mm, su un sostegno di un portone in ferro. Il foro doveva essere più largo ma il problema era lo spessore del pezzo da forare. Nonostante il prezzo a me serviva un utensile che lavorasse più velocemente. Il lavoro è venuto perfetto. Da notare che l'utensile durante l'utilizzo deve essere ben oliato e deve forare con un numero di giri basso e costante. Io ho usato un grasso al litio ma qualsiasi tipo di olio da taglio può andare bene. Per me è un ottimo prodotto.
Thomas P.
Reviewed in Canada on January 10, 2025
Used to drill a 28mm hole in stainless steel sink, this drill did the job effortlessly.
José María
Reviewed in Spain on September 22, 2024
He utilizado la broca para agrandar un agujero en una plancha de acero y ha funcionado bien.
Customer
Reviewed in the United States on March 31, 2024
Bought this to install some additional bungs in my exhaust. Does a great job with piping. Haven’t tried anything thick. But it works for small gauge stainless steel.
Shawn Robin
Reviewed in the United States on February 19, 2024
I needed this bit to set the pilot hole to open up some axle flanges to fit GM metric studs(12mm). I used the 12mm step to pilot the hole then used another regular cobalt bit to drill through. Axle flange was made of hardened steel about 3/8 thick. The bit made quick work of the 10 holes I did. I lubed the hole with cutting oil.
sanjomc
Reviewed in the United Kingdom on December 27, 2024
This was bought for a specific job, and has not been used since. Sharp, and sturdy, and good value.
Timo
Reviewed in the United States on January 17, 2024
Cut like butter through 1/8" steel (two 26mm holes). Very happy!
CRBock
Reviewed in the United States on April 24, 2024
If drilling thru stainless use cutting oil and this will last. This drill did the job.
amiko
Reviewed in Sweden on March 17, 2023
Just used it once and it seems fine
Mathew J. Sgattoni
Reviewed in the United States on November 26, 2023
I am a Journeyman sheet metal worker (retired). I had my tools stolen and I needed a uni-bit for stainless. Good thing: it starts itself. That first penetration takes a bit of time ( keep the oil up!) but once it does it really rips. Be careful that once the hole is started slow the speed and lighten up on the pressure, Otherwise this will bite hard and possibly warp your work (and hurt your wrist) depending on thickness. I was drilling a 18 ga. backsplash. I got a few minor distortions because this bit bit hard. The trim piece for my faucet covered them. I have had other cobalt bits before but this is the best.
Frank Convertini
Reviewed in the United States on April 25, 2023
Needed to drill through 3mm Stainless Steel and have varying hole sizes for the task. This bit provided 20 holes at varying diameters. It cut through the first 10 holes with little degradation. The last hole drilled was degraded by approximately 20% from the first, which is better than I had anticipated.What makes this bit great is that it works and provides different diameter drilling with just one bit.
Steven Stroud
Reviewed in the United States on November 29, 2022
I would give more than 5 stars for this step bit. Went through Stainless Steel like it was butter. Have drilled multiple holes with it and shows no sign of slowing down. Other brands I have used barely cut two holes in the SS.
scotth
Reviewed in the United States on September 4, 2021
I bought 2 of these expecting both be trash at the end of my project. I had 56 holes to drill into 2 stainless steel cabinets. Hole sizes 14mm 16mm and 22mm. The bit started out cutting through 0.75in thk. 304 Stainless like butter. Figured I would get about 10 holes done before it started to wear. Much to my amazement I was able to complete the job. The last 8 were difficult but only at the 14mm step. All of the other steps were still cutting well. After all said and done only needed 1 bit. 1 thing to be noted. I did not take it easy on the bit. I horsed this through the metal. It got very hot but just kept going.If you ate thinking of buying one. Think no further. Just remember to use a little cutting oil and you will be very happy with the results.
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