asilker
Super Member
Yeah baby!
Caballo
New Member
Update: still working on it! We're having to experiment with a different thickness stock to maintain flatness during the operation. Lord knows that's the raison d'etre of a replica platter! I also like the thicker material to reduce ringing effects. The fabricator gave me a new handmade wok the last time I was over there, so that's been nice too.
Caballo
New Member
Well hello folks, it's been long time coming, but I have the platters! The metal spinner did a great job. Here is a sneak preview:
Some work remains to be done: I need to make a jig to locate and drill the three holes around the spindle, so that the original 45rpm adapter and spindle bushing can be used.
The replica is not 100% exact but you would need to have an original one side-by-side to tell the difference. The differences, as far as I can tell, are:
- The material I used is a modern aluminum alloy (6061) and is slightly thicker than the original. This was a deliberate choice as a thicker platter is easier to make flat and should avoid the warping issues plaguing the originals.
- There is no chamfer at the outside edge of the platter. I can put a chamfer there but it would involve some careful work on the lathe. I'm thinking that it's not necessary unless specifically requested. What do you folks think?
I have these available for $325 shipped. Once I drill the center holes, I will consider them finished and will make a new post on this forum with some more photos and some background on how they were made. Some of you have contacted me already to express your interest; if you would like to order one now, PM me, and it will give me some extra motivation to get those center holes drilled and figure out how to ship them.
Some work remains to be done: I need to make a jig to locate and drill the three holes around the spindle, so that the original 45rpm adapter and spindle bushing can be used.
The replica is not 100% exact but you would need to have an original one side-by-side to tell the difference. The differences, as far as I can tell, are:
- The material I used is a modern aluminum alloy (6061) and is slightly thicker than the original. This was a deliberate choice as a thicker platter is easier to make flat and should avoid the warping issues plaguing the originals.
- There is no chamfer at the outside edge of the platter. I can put a chamfer there but it would involve some careful work on the lathe. I'm thinking that it's not necessary unless specifically requested. What do you folks think?
I have these available for $325 shipped. Once I drill the center holes, I will consider them finished and will make a new post on this forum with some more photos and some background on how they were made. Some of you have contacted me already to express your interest; if you would like to order one now, PM me, and it will give me some extra motivation to get those center holes drilled and figure out how to ship them.
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Aluminum edges can be a little sharp, especially while spinning.
I think chamfering or rounding the outer edge of the platter might prevent a few fingertip cuts.
Chamfering or rounding both the inner and outer edges of the platter might extend the life of the clutch "pads".
For shipping...maybe a rigid plywood cradle to support and protect the platter and it's edges. Route a circular groove into thick plywood.
Nice work, BTW!
I think chamfering or rounding the outer edge of the platter might prevent a few fingertip cuts.
Chamfering or rounding both the inner and outer edges of the platter might extend the life of the clutch "pads".
For shipping...maybe a rigid plywood cradle to support and protect the platter and it's edges. Route a circular groove into thick plywood.
Nice work, BTW!
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asilker
Super Member
Clutch pads are a consideration. If this was sharp enough to cut through the pads, it would probably be sharp enough to make some marks in the actual clutch
spartanmanor
Lunatic Member
Looks Good!
Caballo
New Member
To be clear, the edges have all been finished and are not sharp at all. I've tested them on my machine and it works well with the clutch pads. I am talking about the edge where the horizontal meets the vertical. The original part has a cosmetic chamfer there, while mine currently have a fillet there. I can optionally cut a chamfer to better replicate the original.
Ah...I didn't realize which edge you were considering.
It would be nice to replicate the original but if it's only cosmetic it's unnecessary to function.
bob06
Addicted Member
Yes the chamfer is only cosmetics.
isotopesope
Active Member
is your machinist having flatness issues after turning the material? what type of aluminum plate are you starting with? cast tool plate or rolled?
cast tool plate is ideal, as there is very little stress in the material. with rolled plate, the rolling process is preloading the material with stresses... the rolled plate may appear "flat" initially while brand new, but removing any material can cause that pre-loaded stress to normalize, which can then lead to warping. cast tool plate will be more expensive, but will yield more accurate and predictable results.