Decent quality drill bits

[REStracTORATION]

Kent split point here
But expensive

 

[Simmy]

Just save your money and learn how to sharpen them [emoji53]

 

[joe soapy]

Lidl do a set in a metal box that show up on the special buys occasionally, for the price I find them unbeatable. I have a set I use most days and they perform as good on stainless steel that I usually work with as the Dormer,Presto, Ruko, Garant bits I use as well.

Their hss hole saws are pretty good too.

The Aldi ones are good too

 

[Kidds]

Just save your money and learn how to sharpen them [emoji53]

And how to use them, and how to use cutting oil.

 

[bovrill]

I got one of those Lidl sets a while ago, and was surprised how good they were.
I'll get a few boxes next time I see them in.

 

[manhill]

Swear by cobalt drills. Hardly even heat.

 

[David.]

What exactly will a cobalt drill make a hole through then, and will it do it repeatedly? Never bought any.

 

[opininionated]

The machine used to power the drill bit has an important role, cutting at the correct speed has a massive effect on the life of the bit, even more so than lubrication.

 

[manhill]

What exactly will a cobalt drill make a hole through then, and will it do it repeatedly? Never bought any.

Hard metals. Google for More info.
Buy a single bit and satisfy yourself is the best way.

 

[Robt]

The only thing extreme about the dewalt bits is how poor they are. Normally use dormer jobber bits but had some sheared off studs to drill out. 10.9 high tensile studs so off down to screwfix for what I thought would do the job. Started with a couple of 5mm drills, drilling slow with oil to lubricate blunted both before drilling 20mm deep. Screwfix very good and refunded with no question. Finished the job with the dormers.

For that job, get yourself some left hand drill bits! The broken studs will fly out

 

[Pheasant Surprise]

Dormer A190 No. 204 set gets my vote.

 

[joe soapy]

The best dormer bits had a crome band to identify them

 

[tinman]

The best dormer bits had a crome band to identify them

you learn a new thing every day, as long as im at it i never knew that.
i have a few of them here and i often wondered what it was about but never looked it up.
im sure its in me machinery's handbook but i was just too lazy to find out.

what would of made them better.
better ground, better steel, more definitive cut do you know.
or was it a case of all three.

 

[joe soapy]

you learn a new thing every day, as long as im at it i never knew that.
i have a few of them here and i often wondered what it was about but never looked it up.
im sure its in me machinery's handbook but i was just too lazy to find out.

what would of made them better.
better ground, better steel, more definitive cut do you know.
or was it a case of all three.

No idea what made them better, I do know that they were the only bits with a chance of drilling fergy steel used for the linkage drawbar stabilisers

 

[Digester Man]

I bought some Bosch HSS-CO cobalt bits and they are the business, cost about £60 for a 25piece set. They go through mild steel like it’s made of cheese.

Downside is they are quite brittle and I have shattered the 6mm bit - you need to wear safety glasses with them

 

[Hairy Bob]

For that job, get yourself some left hand drill bits! The broken studs will fly out

+1, if they're seized then weld a nut on to the stud and pour cold water over it. I've yet to find a stud that wouldn't come out with this method.

 

[Steevo]

+1, if they're seized then weld a nut on to the stud and pour cold water over it. I've yet to find a stud that wouldn't come out with this method.

Cold water?

 

[Alf]

The only thing extreme about the dewalt bits is how poor they are. Normally use dormer jobber bits but had some sheared off studs to drill out. 10.9 high tensile studs so off down to screwfix for what I thought would do the job. Started with a couple of 5mm drills, drilling slow with oil to lubricate blunted both before drilling 20mm deep. Screwfix very good and refunded with no question. Finished the job with the dormers.

what you took them back !!!!!!!!!

 

[TheTallGuy]

Cold water?

The cold water shrinks the stud whilst the surrounding material is still hot from the welding. The different contraction speeds breaks the bond between the stud and the surrounding material.

 

[Paddington]

Any tips on sharpening De Walt extreme double fluted bits with a standard grinding wheel ?