Do You Need These? HERCULES Cobalt Step Drill Bits Review [Harbor Freight]
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- Опубликовано: 1 мар 2023
- We take a closer look at the HERCULES Cobalt Step Drill Bits. Will they work on mild steel and stainless steel?
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drilling stainless requires patience, slow and cold is the recipe for success, fast and hot will "work harden" stainless steel. step bits are not the best choice for stainless in general.
Yeah, I learned why they sell those absurdly priced (at least to a homeowner) punches to get through SS sheet
Ended up getting a cobalt bit on a rotary tool to finish up the SS sink hole I was trying to drill, and was very thankful the escutcheon covered up my malarkey
Well done and well explained vid. Thank you!
With the regular twist drill you ran the drill at full rpm and with the step bits you went with a slower rpm. Reducing the rpm of a regular twist drill can help not leaving as much burr on the break through.
"Turn it around and hit it from the other side".... "we'll slow it down a little bit"...."go to another hole".... "definitely warm!"...."that really beat up the hole pretty good...let's try that one more time!" The importance of context kids is important lol😂😂😂😂
They cheap because of LOW % of Co. Normally "cobalt" means MINIMUM 8% Co in the alloy, many companies such as hobofreight are 5% OR LESS. Todd at PF did a definitive review of metals and designs determining spiral dual flute to be optimal, min 8% Co.
Yep, works good on mild steel, but they show their colors in the Stainless. Thanks for watching.
That's kind of ignorant. If anything usually if it just says "Cobalt", that's going to be 5% Co, or M35 grade. If it's M42 grade, which is 8% Co, they'll usually advertise that fact, or have it marked on the bit. Cheapness also got nothin to do with it, it's about the use case for what you need. The higher the Cobalt content the harder and much more brittle the bit becomes. M42 Bits tend to be mainly used in high production stationary drill applications (drill presses, etc.) where the bit is locked in position, which decreases chance of it breaking. M35 is good for both hand drills and drill presses, with less likelyhood of snapping than M42.
It cut the stainless the first time, so it's hard enough. The bigger the hole, the slower the speed. With stainless other than a pilot, holes always go slow and push hard. As soon as you go too fast, you overheat the bit, and it gets dull. Kudos on the paste lube, but be generous with that on stainless.
Says right on the package for drill use only for either set. Do not use an impact you risk the bit shattering or shearing from the impacts if you do.
I was chucking one of these in my Hercules drill and accidentally pressed the trigger. They’ll definitely cut through fingers lol.
Great video STR. I still need to get mo a step drill bit. I could really use one.
Appreciate it. Yes, step bits are great to have.
I also use a sharpy. They do look like very good bits.
They are good bits, but I wouldn't recommend them for Stainless Steel. Thanks for watching.
Cobalt should be turned slow or will overheat
nice drill bits
Where you get the CUTTING PASTE at ?
Spyder Mach-blue goo = available at Lowe’s for ~$10.00 a bottle.
@@gomerhondo7249 Thanks!
There good for the price
Drills were painted on top.
Help step drill bit. I'm stuck.
What are you doing step drill bit?
Just ONE word, ONE.. Cutting Oil!
@@mos8541Or two words..
You should havecalled this video "what is a step drill and how to use it". I thought this was a test video to see if they were worth the price.
First
🍪
Who gives a fukk?!
you should review the astro hyperstep bits. matcos patent expired
Those are pretty sweet bits, and we do need to get them in the shop. Thanks for watching.
@@Shoptoolreviews for sure