With Instructables you can share what you make with the world and tap into an ever-growing community of creative experts.
share what you made with text, photos, video, and files
gather your favorite instructables together
We have a be nice comment policy. Please be positive and constructive.
safe to say there is more than a hand full of different answers to what material the platters are made from, but for your answer any 3.5 hard drive platter would be safe to cut a slot in it.. Regardless if you do have any doubts for any project just take necessary safety measures - sectioned off designated workspace with close proximity to tap water, fire extinguishers and liquid spill kits. And safety wear (goggles, gloves, fitted clothing preferably fire resistant material).. a second person is also a good idea, not much one person can do with any issue if they were to be knocked out (ive worked with all sorts of industrial machines and every power tool and never had any accidents but i was once knocked out for a few minutes when a small dremel hobby drill caught one of my dreadlocks that fell in front of my face, wrapped up the dread pulling drill from hand and smacked me right in my temple. Had it been a lathe i may have been scalped)
from outter-most layer to inner-most layer, the composition of a 3.5" hard drive platter is as follows...5 micron thick layer of cobalt, the magnetic data substrate. 20 micron thick layer of 90% nickel & 10% phosphorus, making the nickel non-magnetic (This layer is present because nickel takes a very high polish and cobalt (the outter-most layer) does not adhere well to the inner-most layer. The inner-most layer is comprised of 96% Aluminum & 4%Magnesium; Aluminum is cheap and lightweight, and magnesium strengthens aluminum.
I happen to work with a Niton X-Ray gun and came across a few hard drive platters at work. So I gunned them :) Heres what I found:
I igrinder the surface to get a more accurate reading, though , despite my best efforts , I may have just ground the nickel deeper into the matetial
But what about the platinum? Shouldn't it be covered with that too? http://www.ebay.com/gds/Paying-too-much-for-platinum-from-hard-drive-platters-/10000000008494913/g.html
mine just shattered. thats why im here.
Hahaha! That's why I'm here
Build a 15,000 rpm Tesla Turbine using hard drive platters
Recycled Hard Drive Desk Clock
Simple Hard Drive Platter clock
Hard drive platter clock.
Commemorative Hard drive clock
Glow in the dark RAM clock
Hard Drive Persistence of Vision (HDPOV)
GEEK-TO-YOU: How to take apart a hard-drive (humor included)
Miniature Revolving Solar System
Recycled Hard Drive Clock - FuneLab
Posted:Apr 7, 2010
Download our new apps for iOS, Android and Windows 8!
© 2015 Autodesk, Inc.
By clicking "Create Account" you are indicating that you have read and agree to the Terms of service.
Already a member? Login »
Enter the email associated with your account and we will send you your username and a temporary password.
Not a member? Sign Up »