[GreenKeys] More on the LPR hammer?

Sat Jan 11 20:48:54 EST 2020

Here's an idea.  I wonder if we can use the same outfit Dave Tumey used when he had the 33 hammers made. We could get them made in bulk, like Dave did.

Once the engineering drawings are finished I will follow that up. I would think the same materials Dave used might work. Anyone see any reasons why not? Anyone have any knowledge of the process? I would think a test run first would be in order.

Paul
W2TTY
> 
> 
> 
> On Sat, Jan 11, 2020 at 1:05 PM Paul Heller <paul0926 at comcast.net <mailto:paul0926 at comcast.net>> wrote:
> Agreed, Tom! I’ll need a few. Not sure if Mark will be able to make them for others, or if we need to all get 3D printers, or if we can find a third party to reproduce them. I’ve heard there are third parties what will indeed do this, even to scale if need be.
> 
> One key item will be finding an elastomer that can stand up to thousands of punches and last many years.  Especially one that can be 3D printed. That sounds hard, but I know nothing about 3D printing, so fingers are crossed for Mark to find success!
> 
> I spoke with George Hutchison and got some more information on how far he got. He had a mould made that could produce 10 or 20 at a shot. He was experimenting with various elastomers and found one that would meet the specifications very nicely. The problem was that bubbles wold form. He tried vacuum to prevent that, but it did not work. If I understand correctly, he was told by the manufacturer to use pressure and a gas. Well, that makes things much harder doesn’t it? It think at that point, which was a few years ago, he stopped working on the project.
> 
> If anyone wants to try to pick up where he left off, let me know and I will connect you with George.
> 
> Paul
> W2TTY
> 
> 
> 
>> On Jan 11, 2020, at 10:32 AM, til128 at juno.com <mailto:til128 at juno.com> wrote:
>> 
> 
> 
>> Here's hoping.  :-))
>> 
>> Tom
>> 
>> ---------- Original Message ----------
>> From: Russ Miller <wa3frp at gmail.com <mailto:wa3frp at gmail.com>>
>> To: "Mark J. Blair" <nf6x at nf6x.net <mailto:nf6x at nf6x.net>>
>> Cc: GreenKeys Mailing List <greenkeys at mailman.qth.net <mailto:greenkeys at mailman.qth.net>>
>> Subject: Re: [GreenKeys] More on the LPR hammer?
>> Date: Sat, 11 Jan 2020 12:24:25 -0500
>> 
>> Mark,
>> 
>> Thanks for working on this great project. You were solution is very much needed. I know I can use three or four LPR hammers here!
>> 
>> Thanks 73
>> 
>> Russ WA3FRP 
>> 
>> Sent from my iPhone
>> 
>>> On Jan 11, 2020, at 12:14 PM, Mark J. Blair <nf6x at nf6x.net <mailto:nf6x at nf6x.net>> wrote:
>>> 
>>> I've received the hammer from Nick (thanks!!!), and I plan to work on a CAD model of it this weekend.
>>> 
>>> -- 
>>> Mark J. Blair, NF6X <nf6x at nf6x.net <mailto:nf6x at nf6x.net>>
>>> http://www.nf6x.net/ <http://www.nf6x.net/>
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Paul
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