Cobalt drills

Cobalt drills are excellent at drilling through hard metals, they can often drill tough metals that a normal High speed steel drill bit cannot drill. Here http://www.ultimatehandyman.co.uk/forum1/ shows the massive difference between a standard HSS drill bit and a cobalt drill bit, supplied by http://kitchenfitterstools.co.uk/

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• Cobalt drill
• cobalt drill bit
• drill hard metal
• cobalt
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[PUSSY100ish]

Do you get cobalt holesaws?

[ultimatehandyman]

@PUSSY100ish

You can get cobalt holesaws but I have not tried them yet.

[PUSSY100ish]

@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.

[ultimatehandyman]

@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

[PUSSY100ish]

@ultimatehandyman Thanks buddy

[ultimatehandyman]

@PUSSY100ish

You are welcome ;-)

[ultimatehandyman]

@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!

[frozenwalkway]

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.

[huntercarbino]

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

[thewelderdude]

@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.