PSN-L Email List Message

Subject: Re: Tungsten Pins
From: "meredith lamb" paleoartifact@.........
Date: Wed, 18 Jun 2008 10:51:04 -0600


Hi Dale,

You have spectacular nature/science images on your website!

Very good result image enlarging effort with what you had...thanks!

Although the 2 photos are angled, I see the rod was single cut/pass diamond
wheel 45 degree chamfered around the outer top ends.
Then it was diamond tumbled polished.  The end point was initially flat
after chamfer and any rounding polished
action could have potentially made a slight bit of centered ~ rounded point
thereon.  The outer diameter rod itself looks to have a
adequate rolling pivot contact surface finish.  As for myself....I think I'd
rather use a more spherical ball pivot point.

Take care, Meredith



On Wed, Jun 18, 2008 at 12:09 AM, Dale Hardy  wrote:

>  Hi Meredith,
> best picture i can take is at http://www.daleh.id.au/pictures1.html
>  that is about 12X
> Under 10X glass no sign of grinding marks, the reflection in the image is
> my window near where i took the picture.
> 3 Rods ? as in >|o|< arrangement ?
> ta
> Dale
>
>
>
>
Hi Dale,
 
You have spectacular nature/science images on your website!
 
Very good result image enlarging effort with what you had...thanks!
 
Although the 2 photos are angled, I see the rod was single cut/pass diamond wheel 45 degree chamfered around the outer top ends.
Then it was diamond tumbled polished.  The end point was initially flat after chamfer and any rounding polished
action could have potentially made a slight bit of centered ~ rounded point thereon.  The outer diameter rod itself looks to have a
adequate rolling pivot contact surface finish.  As for myself....I think I'd rather use a more spherical ball pivot point.
 
Take care, Meredith


 
On Wed, Jun 18, 2008 at 12:09 AM, Dale Hardy <photon1@...........> wrote:
Hi Meredith,
best picture i can take is at http://www.daleh.id.au/pictures1.html
 that is about 12X
Under 10X glass no sign of grinding marks, the reflection in the image is my window near where i took the picture.
3 Rods ? as in >|o|< arrangement ?
ta
Dale
 

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