@ultimatehandyman Thank you for the reply. I want to mount an item to a brickwall that weighs 130kg. The instructions suggest mounting it to masonry such as concrete or stone wall. Will a normal brick wall do, as it is masonry too.
know anything about how well the cobalt bits, drill 5160 spring steel? i forge my blades but i cant anneal them because i dont have a heat treat oven.
hello the company i work has recently started using 5% cobalt drill bits( made in brazil) instead of hss drill bits that use to be uk manufactured then they moved to importing brazilian made hss drill bits with their company name on them,i then noticed a big drop in quality. back to these cobalt drills i really cant say that there is alot of difference in the temperature handling of the 2 types of bit , i can say your first bit took longer to drill due to a lack of thinning across the tip of th
Please don't be offended but for a drill bit of that size its not really possible to apply the optimum amount of pressure unless one has a drill press. The cobalts do have another snag besides price - they are more brittle. For really tough jobs such as drilling holes in the ends of pipe wrenches and adjustable spanners even cobalt struggles. For such jobs one needs a Stellite drill and a drill press that can produce about 1HP or more. (The holes are to attach strings for safety reasons).
Please dont be offened! I am not knocking your vid or points of view. All HSS has cobalt in it. M35 HSS has 5% in it and the "cobalt drills" have 8-10% cobalt known as grade M42 HSS. They penatrate faster because of the point. The black drill is a standerd chiesel point at 118*. The cobalt are split point 135*. You can buy HSS split point 118*or 135* drills and get the same results as the cobalts. The cobalts WILL drill more holes before dulling though. The drill point makes the difference.
@joleenmorganjohn Not all HSS's has cobalt in them. Most HSS bits are made of M2 HSS, which has NO cobalt in them. Your are correct about the M35 and the M42 bits though. The alloy formulation for M2 and M35 is the same except the M35 has 5% cobalt. M42, on the other hand, has more Molybdenum and less Tungsten and the 8% cobalt.
Hello there, thanks for posting this great video. I am trying to drill the top off an engine bolt on my car (which holds the cylinder hear onto the engine block), as the head of the bolt has sheared off in the process of opening as it has either seized or been over-tightened. Looks like it's made of some kind of hardened steel as my metal chisel has barely scratched the surface with some pretty hard hammer blows. Just wondering if the cobalt bit doesn't work is there a next level of hardness?
Do you get cobalt holesaws?
PUSSY100ish 3 weeks ago
@PUSSY100ish
You can get cobalt holesaws but I have not tried them yet.
ultimatehandyman 3 weeks ago
@ultimatehandyman Thank you for the reply. I want to mount an item to a brickwall that weighs 130kg. The instructions suggest mounting it to masonry such as concrete or stone wall. Will a normal brick wall do, as it is masonry too.
PUSSY100ish 3 weeks ago
@PUSSY100ish
A brick wall should be suitable as long as you can get enough fixings in it. Some bricks are easier to fix to than others
ultimatehandyman 3 weeks ago
@ultimatehandyman Thanks buddy
PUSSY100ish 3 weeks ago
@PUSSY100ish
You are welcome ;-)
ultimatehandyman 3 weeks ago
know anything about how well the cobalt bits, drill 5160 spring steel? i forge my blades but i cant anneal them because i dont have a heat treat oven.
frozenwalkway 3 weeks ago
@frozenwalkway
I'm not sure about that. I have drilles spring steel using regular drill bits but I do not know the grade of steel!
If you are using a drill press have you considered the ARTU drill bits?
I have just ordered a set of these to test out as you can drill through hardened steel with them- apparently!
ultimatehandyman 3 weeks ago
hello the company i work has recently started using 5% cobalt drill bits( made in brazil) instead of hss drill bits that use to be uk manufactured then they moved to importing brazilian made hss drill bits with their company name on them,i then noticed a big drop in quality. back to these cobalt drills i really cant say that there is alot of difference in the temperature handling of the 2 types of bit , i can say your first bit took longer to drill due to a lack of thinning across the tip of th
huntercarbino 1 month ago
Please don't be offended but for a drill bit of that size its not really possible to apply the optimum amount of pressure unless one has a drill press. The cobalts do have another snag besides price - they are more brittle. For really tough jobs such as drilling holes in the ends of pipe wrenches and adjustable spanners even cobalt struggles. For such jobs one needs a Stellite drill and a drill press that can produce about 1HP or more. (The holes are to attach strings for safety reasons).
techdavey1000 2 months ago
What are your thoughts/comments on drill bits that are coated with titanium nitride?
Orcinus24x5 2 months ago
@Orcinus24x5
It depends on the quality really. I have tried some and they have been ok, but other ones have peformed worse than regular HSS bits
ultimatehandyman 2 months ago
drilling is mantra and yoga and meditation!
obaidCarkey 7 months ago
What do you use for sharpening your drill bits?
cheers!
FirebrandNIRE 7 months ago
@FirebrandNIRE
A bench grinder, but it takes lots of practice.
There are some dedicated machines now for sharpening drill bits, but I have not tested one yet!
ultimatehandyman 7 months ago
Please dont be offened! I am not knocking your vid or points of view. All HSS has cobalt in it. M35 HSS has 5% in it and the "cobalt drills" have 8-10% cobalt known as grade M42 HSS. They penatrate faster because of the point. The black drill is a standerd chiesel point at 118*. The cobalt are split point 135*. You can buy HSS split point 118*or 135* drills and get the same results as the cobalts. The cobalts WILL drill more holes before dulling though. The drill point makes the difference.
joleenmorganjohn 1 year ago
@joleenmorganjohn
I'm Not offended at all.
Thanks for the comment ;-)
ultimatehandyman 1 year ago
@joleenmorganjohn Not all HSS's has cobalt in them. Most HSS bits are made of M2 HSS, which has NO cobalt in them. Your are correct about the M35 and the M42 bits though. The alloy formulation for M2 and M35 is the same except the M35 has 5% cobalt. M42, on the other hand, has more Molybdenum and less Tungsten and the 8% cobalt.
thewelderdude 2 months ago
Hello there, thanks for posting this great video. I am trying to drill the top off an engine bolt on my car (which holds the cylinder hear onto the engine block), as the head of the bolt has sheared off in the process of opening as it has either seized or been over-tightened. Looks like it's made of some kind of hardened steel as my metal chisel has barely scratched the surface with some pretty hard hammer blows. Just wondering if the cobalt bit doesn't work is there a next level of hardness?
jrd476 1 year ago
@jrd476
I think carbide drills are harder than cobalt.
Drilling out any bolt is never easy, especially on an engine!
Best of luck with it.
ultimatehandyman 1 year ago
what kind of steel am i dealing with if i need 1 hour to drill a hole in a 5mm plate?
i think if i would buy the cobalt drills it would even take to long.
are there any stronger bit then cobalt? i really dont know what kind of steel this is.
veryfuck 1 year ago
@veryfuck
Sounds like it may be hardened steel.
It might have an high carbon content or it might be work hardened.
It's an absolute nightmare to drill through!
You will even struggle with cobalt drill bits.
ultimatehandyman 1 year ago
I got this same kit Cobalt drill bit RULE!!
I love you DIY mug!!
wsanriv 1 year ago
very useful tool! I should get one.
largestss 2 years ago
Great video.
I use nothing but cobalt now. Can't imagine going back to HSS drills now.
TK42138 2 years ago
@ TK42138
Thanks for the comment.
They are so much better than HSS, I'll never buy HSS bits again either.
ultimatehandyman 2 years ago
Great video, five stars.
I've got a set of cobalt drillbits and for getting through stainless steel there's nothing to beat them. Well worth the money.
TK42138 2 years ago