- Thread starter jordan1
- Start date
pedrobedro
Man at Matalan
- Messages
- 13,054
- Location
- CX near Chesterfield
If it's on QVC it must be brilliant 
Frozen car parts, won't they thaw out when you take them out of the freezer thus negating any advantage of being frozen? I put anti freeze in there to stop the engine parts from freezing.
Frozen car parts, won't they thaw out when you take them out of the freezer thus negating any advantage of being frozen? I put anti freeze in there to stop the engine parts from freezing.Shouldn't impurities be removed from metal in the molten state during manufacture? That's how it's always been done, skim the dross of the top of the melt and tap off the slag first.
Can't see how any impurities are going to be removed from metal in a solid state as they are already alloyed into the metal or at least within the grain structure.
Sounds like advertising cobblers to me, unless the container ship got lost on it's way from China and went via the antarctic.
mike os
just a little insane.....
- Messages
- 9,809
- Location
- North Wales
or possibly.... with a highly specialised alloy made for a specific product at phenomenal expense you gain a tiny amount of additional strength or weight loss?
....cryo temps do odd things so may improve the lattice/grain, or have some other odd effect, but it cannot be major, or a significant ( in real terms) "improvement" for "normal" use
given that it is on shopping channel rather than industry suppliers lists.....
....cryo temps do odd things so may improve the lattice/grain, or have some other odd effect, but it cannot be major, or a significant ( in real terms) "improvement" for "normal" use
given that it is on shopping channel rather than industry suppliers lists.....
It wouldn't be a bad idea to Google The properties of using Cryogenics on metals, before commenting.
Tell us more? Save us wasting time on the bad links that inevitably come up.
It was a flippant post to be honest.
I know as much as the rest., hence to post
But I'll admit I did as you suggested and Googled.
http://en.wikipedia.org/wiki/Cryogenic_hardening
It does seem it has some truth, I was shocked as I thought anything below the tempering point had no effect on grain structure. Bit more involved than simply dipping you drill bit in liquid nitrogen though, the material composition has to be correct to be suitable for treatment, makes me doubt whether the shopping channel bits are or just a gimmick.
Might have been flippant but it's good advice.
http://www.metalscience.com/techinfo_ASM.php
Cryo treatment is not new, it's not "snake oil" and it does have significant benefits. As it becomes cheaper and easier to use it's filtering down from the areas where cost is secondary to performance and into the more everyday uses that we are likely to see in everyday use.
Still not sure I'd take the word of anyone on a shopping channel though.
Iain
http://www.metalscience.com/techinfo_ASM.php
Cryo treatment is not new, it's not "snake oil" and it does have significant benefits. As it becomes cheaper and easier to use it's filtering down from the areas where cost is secondary to performance and into the more everyday uses that we are likely to see in everyday use.
Still not sure I'd take the word of anyone on a shopping channel though.
Iain
They were demonstated, drilling straight through vehicle brake discs, heavy duty road manhole covers and other metals with ease, without coolant using a bog standard hand drill. Also sailed through glass and granite. Just seemed impressive. They did say that selling these drills were not regular to them but these were an exception. You pays your money and takes your choice as they say.
inchpincher
2-stroke terror
- Messages
- 471
- Location
- Tring, UK
I remember a few years ago reading an article about scooter racers who cryo freeze a couple of the engine internals (gear box, gear selector etc) for a bit more longevity. Consensus was it worked but the financial outlay was the same as a new gear box...
Would they be easy to drill without coolant without damaging the tip and go on to drill other hard metals, glass, and granite with the same drill bit.
If the bit is brand new I'd say so, ductile iron is pretty easy to drill to be fair. The glass and granite you wouldn't normally use that bit, but with the correct angles i'd imagine its possible.
Regards
Ricky
PhillipM
Member
- Messages
- 3,039
Yes, if you were doing a demo and didn't give a damn about what the tips came out like at the end of it. Ductile iron and cast in brake discs doesn't need any coolant as the graphite in in lubricates the cutting edges.
BigBossMan
Member
- Messages
- 64
I've bought a cryo drill bit set in the past and believed all the sales hype (yes, I'm that gullible).
It was from a shopping channel too (not QVC) that gave a lifetime guarantee to replace any bits broken (just send a cheque for £4.95 to cover postage!!).
I bragged to my mate how good they would be and I'd never have to buy another drill bit as long as I lived. "Unbreakable" I said, 10 seconds later "Oh dear" he said... "managed to break one".
Anyway to cut a long story short I sent off my broken drill bit with the cheque and a copy of my guarantee and waited...and waited... nothing! Turned out the return address was in Skegness but the company was on the south coast. Eventually after many phone calls to the shopping channel I did get a drill bit back many weeks later.
Since then I have managed to break another but tbh I can't be arsed with the hassle and they don't drill a very good hole anyway and they only cut if you have the body strength to push the drill bit into the substrate with force.
So, what I'm trying to say is...waste of money, better off going to Tracy Tools etc and getting some decent bits.
It was from a shopping channel too (not QVC) that gave a lifetime guarantee to replace any bits broken (just send a cheque for £4.95 to cover postage!!).
I bragged to my mate how good they would be and I'd never have to buy another drill bit as long as I lived. "Unbreakable" I said, 10 seconds later "Oh dear" he said... "managed to break one".
Anyway to cut a long story short I sent off my broken drill bit with the cheque and a copy of my guarantee and waited...and waited... nothing! Turned out the return address was in Skegness but the company was on the south coast. Eventually after many phone calls to the shopping channel I did get a drill bit back many weeks later.
Since then I have managed to break another but tbh I can't be arsed with the hassle and they don't drill a very good hole anyway and they only cut if you have the body strength to push the drill bit into the substrate with force.
So, what I'm trying to say is...waste of money, better off going to Tracy Tools etc and getting some decent bits.
