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Buttons With Delrin Core And Metal Caps


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#19 alex_holden

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Posted 02 January 2018 - 01:46 AM

It would be interesting to compare wooden cores to acetal/Delrin cores. I suspect they may be a tiny amount lighter, but more prone to failure from splitting and pin wear. Does anyone know what wood they originally made the cores from? I'm thinking ash might be a good choice, for the same reasons they used to make car body frames from it (light, strong and flexible).

Edited by alex_holden, 02 January 2018 - 01:46 AM.


#20 Geoff Wooff

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Posted 02 January 2018 - 02:31 AM

Perhaps  the  modern  plastics, such a Delrin,  will be stronger  than the  type  used  to replace  wood  in the later Wheatstone  buttons  but  I have come across  far more broken  plastic core buttons  than the  old wooden  types.



#21 alex_holden

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Posted 02 January 2018 - 02:38 AM

Perhaps  the  modern  plastics, such a Delrin,  will be stronger  than the  type  used  to replace  wood  in the later Wheatstone  buttons  but  I have come across  far more broken  plastic core buttons  than the  old wooden  types.


The Wheatstone sample appeared to be made from a hard brittle plastic, maybe something like Bakelite. Delrin is quite soft and flexible, and more likely to bend than break.

#22 DDF

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Posted Yesterday, 07:08 AM

Here is a rough comparison of the weights of a Wheatstone button and some made to the  approximate dimensions in nickel and titanium.David.

 

Wheatstone capped.JPG

Wheatstone style nickel..jpg

Wheatstone style titanium..jpg

33 Wheatstone style nickel..jpg

33Wheatstone style titanium..jpg



#23 alex_holden

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Posted Yesterday, 07:41 AM

Thanks David. For convenience, I've transcribed your photos into text:
 

1 Wheatstone capped: 1.3g
1 Wheatstone style nickel: 3.1g
1 Wheatstone style titanium: 1.6g
33 Wheatstone style nickel: 103.2g
33 Wheatstone style titanium: 53.5g


By nickel, do you mean solid nickel-silver?

One of the Wheatstone-style 5.7mm diameter nickel silver capped/acetal core buttons I made weighs 1.1g on my digital lab scales.

#24 DDF

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Posted Yesterday, 10:23 AM

Yes solid nickel silver.The only Wheatstone button I had handy was an early one with an ivory core which I guess would be a little heavier than the beech? or plastic cores.David.






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