|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
202.83.241.101
Hello!
My fiend want to custom made a platter in titanium for his turntable.
What are the differences between grade 1 and grade 2 of titanium??
Thanks!
Follow Ups:
I see you are in Oz. Duc ('lovetube' here and on SNA) can machine a Delrin platter for your friend - it is supposed to be a very good material for platters (much more damped than, say, aluminium or Mazak).
Alternatively, a mate of mine has just taken delivery of an anthracite platter for has Soulines TT - he reckons it gave a helluva improvement. (I'm going over to listen to it at the weekend.)
Regards,
Andy
.
Gun metal . I have the newer version which is 5mm thick and weighs 2kg.
(Not my deck. Mine is on a 401).
Big J
"... only a very few individuals understand as yet that personal salvation is a contradiction in terms."
Was an expensive option on the Yamaha GT 2000. Easy to cast and machine. It will be heavy and will tarnish.
True terror is to wake up one morning and discover that your high school class is running the country.
quote by Kurt Vonnegut
Ti is valued for it's high strength-to-mass.
It's not particularly stiff (16 vs 10 for Alum, or 30 for steel)
Really not a good material for a platter, since strength is usually
not a big factor. But it will look cool.
...Ti is most notable for its use in aerospace design. Not only lower mass, comparable to Aluminum and with tensile strength comparable to high carbon steel, it is unaffected by high heat. Thus it gets used in jet engines; for instance, the intake fans use a titanium investment casting (at incredible cost!)
The material has a different requirement for the tools used to machine it with. Generally lower cutting speeds with higher feed rates, as a general rule. A common Ti alloy used in aerospace mfg: Ti-AL6
-Steve
for anyone at any level in this hobby.
My hat is off to all of you for sharing your knowledge.
"The piano ain't got no wrong notes." Thelonious Monk
Hard to machine
Valued for its properties of low density and high strength
Neither of which are necessary in a platter
So... why bother?
Linn platters are made from 'Mazak' - an alloy of zinc and aluminium. I think mine is pretty heavy ... but solid-plinth (unsprung) TTs sometimes have very heavy platters, by comparison.
Andy
If a metal is lower density than another it will weigh less.
.
I know of no particular reason why titanium would be good platter material. It worked great and was a necessity in constructing the SR71 "Blackbird", however.
.
Go to page 49 to see the results of the sound absorption characteristics of several metals they tested.
The ceramic looked to be the most interesting to play with. If I were making turntables I would read this one all the way through.
I have a VPI Ceramic (coated) platter....sounds exactly the same the non-coated ones...though it shows no fingerprints.
The P7, P9 and P10 have ceramic. They are also to my ear by far the best sounding Rega tables that there are.
Back in the day there were several companies that made ceramic tt mats. By all accounts they sounded bad and are to be avoided.
Go figure.
I must be a tin ear or have never had good enough equipment to resolve differences between mat materials. Maybe now that I'm upping my game I will begin (or at the very least THINK I will be) hearing differences.
I thought the sound absorption or dampening properties of certain metals would be interesting for other parts of the turntable as well. Maybe ceramic sucks as a platter material, but would do well as a plinth?
I was especially curious about the "oil impregnated bronze" vs "dry bronze". If nothing else a turntable with bronze parts would look really nice. Bronze and Burl....mmmmmmm yeahhhhh.
between 1 and 2? for accoustic properties rather than building a bridge? i'd suspect none.
I was going to suggest the speed of sound in Ti might make for a weird choice, in terms of transmission for vibrations between the playing surface and the bearing. But i looked it up, and just like it splits perfectly the difference between Alu and Iron in specific strength it matches them pretty close for speed of sound.
I'm not exactly sure what benefit it would confer. It has a nice feel to it though. Might be an internal damping thing. Tricky to find data on that it looks like.
Why not aluminum alloy with titanium nitride coating?
if cast it has to be cast in a vacuum furnace. if machined it has to be machined from plate stock a 12"x12"x1" plate is over $750 from most sources i located. also the material must be stress relieved before final dimensioning.
dee
;-D
True terror is to wake up one morning and discover that your high school class is running the country.
quote by Kurt Vonnegut
the answer lies in the alloy - or not- of the material.
Titanium, like aluminium is often alloyed to attain certain properties- hardness, ductility, durability, tensile strength, etc.
Try the link below for some more specific details - Titanium is available un-alloyed or in a variety of alloys for specific purposes-
Please remember that forged alloys and cast alloys are usually different and are often not very similar-
I must say - unless I have missed something- titanium seems like a bit of gilt on the Lilly for a platter material...
Happy Listening
I've been machining Ti off and on for nearly 40 years now. Type 1 or 2 means nothing, Ti is an alloy and is treated in many ways according to its intended use.
All Ti turns and machines easy with the correct tools.
Alum would be a much better choice IMO cost being a major reason. I doubt a Ti platter would be any better than Alum.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: