Cobalt drills

[sailorman]

There was always a man at LIBS selling drills that would cut files and almost everything else. They always looked pretty impressive but when I finally went to buy some he was no longer exhibiting. I understand he retired a few years ago.

Of course a file can be annealed but look no different

 

[doug748]

I occasionally watch the TV shopping channels. There's an advert for drills that look like masonry drills, but they use them to cut through several materials, including a steel file. Always been a bit sceptical myself.

The very thing I was thinking of mentioning.

I don't know what the composition of these drills is (they never seem to mention this) but the demonstration is always impressive.

BTW, whilst I am here, I am another who always uses HSS bits for stainless.

 

[NornaBiron]

I had cobalt drill bits and normal HSS bits but the link points to the best I've found for drilling stainless steel plate. A few years back they out-lasted the others at a rate of 5 to 1. I want a new box now

http://www.screwfix.com/p/dewalt-extreme-2-hss-drill-bit-set-29pc/20064

They are expensive so use lube and a slow speed to look after them.

 

[sailorman]

sharp, slow + lube = HSS

 

[doug748]

Did a bit of searching for the magic drills - As Seen on TV:

http://www.drillalldrillbits.com/

 

[sailorman]

Did a bit of searching for the magic drills - As Seen on TV:

http://www.drillalldrillbits.com/

And Im a Chinaman

Drills all materials including wood,metal,tile,steel,aluminium,glass,concrete and so much more. Change materials without changing the drill bit. ​

​

​

Grinds rather than cuts ​

​

​

Works fine at any speed and with or without hammer actiion, Stands temperature other drill bits can't stand ​

​

​

Our Drill all drill bits can withstand high temperatures, They have negative tip gives precision. Cobalt tipped - designed for maximum hardness and resistance to heat and wear.​

​

​

Special negative rake grinding enables the tip to bore through all materials with a filing action rather than a cutting action. This enables you to drill through brick, steel, stone, marble and many more products. The heat generated will not affect the tip because the high tech bonding allows the bit to withstand high drilling temperatures.​

​

​

Comes neatly packaged in a convenient metal carry case to keep your drill bits organised, tidy and portable! All drill bits are fitted with a hexagon shank that fits in to any standard chuck.​

​

illinaman

​

​

​

​

all materials including wood,metal,tile,steel,aluminium,glass,concrete and so much more. Change materials without changing the drill bit. ​

​

Grinds rather than cuts ​

Works fine at any speed and with or without hammer actiion, Stands temperature other drill bits can't stand ​

Our Drill all drill bits can withstand high temperatures, They have negative tip gives precision. Cobalt tipped - designed for maximum hardness and resistance to heat and wear.​

Special negative rake grinding enables the tip to bore through all materials with a filing action rather than a cutting action. This enables you to drill through brick, steel, stone, marble and many more products. The heat generated will not affect the tip because the high tech bonding allows the bit to withstand high drilling temperatures.​

Comes neatly packaged in a convenient metal carry case to keep your drill bits organised, tidy and portable! All drill bits are fitted with a hexagon shank that fits in to any standard chuck.
​

 

[Sailfree]

Did a bit of searching for the magic drills - As Seen on TV:

http://www.drillalldrillbits.com/

Look similar to the set I bought of the drillman stand at SIBS in 2014 - never used them yet!!

 

[rogerthebodger]

Any one in Plymouth who could check the supplier out and report back.

http://www.drillalldrillbits.com/page12.htm

 

[sailorman]

Look similar to the set I bought of the drillman stand at SIBS in 2014 - never used them yet!!

Thats why they last forever

 

[cliff]

>Next time you do it please can you post a video of it.

Firstly it's very thin secondly is it 316 marine grade?

Turdly, there is no such material as "316 marine grade" 316 is 316 as 304 is 304 etc.

 

[doug748]

Any one in Plymouth who could check the supplier out and report back.

http://www.drillalldrillbits.com/page12.htm

I am in Plymouth. Some gentle digging suggests the address is probably little more than a mailbox.

Of course this does not mean the product is itself no good.....

...we should respectfully ask Sailfree to get cracking with his set, to see how things stand