Re: [PSUBS-MAILIST] How to make a spring?

["kocpnt tds.net" <kocpnt@tds.net>]

Hi Alec,

 

Actually it is as simple as winding stainless steel wire around a mandrel. I would not have attempted it but for the encouragement of a fellow psubber. I think it was Dan H. if memory serves right. I have a lathe that can be geared down to 35 RPM. These were torsion springs and probably easier to make than compression springs as you may need to control the pitch with carriage movement. Basically I had to put a bead of weld on the mandrel because of the torque or the jaws would not hold well enough (I was using 3/8 inch stainless) I practiced with mild steel first and just made a wood block which fit above the ways and started turning. Oiling the wood really helps the process. While I had good success, it would have been better to have a helper to squirt oil etc. as you can run out of hands when appraoching the shut off point.

 

Best Regards,

 

Jim K

On Sat, Jan 9, 2010 at 5:44 PM, Smyth, Alec <Alec.Smyth@compuware.com> wrote:

Hi all,
I'm needing some stainless springs 3.5" in diameter, and my usual industrial suppliers don't stock anything near as large. These would be quite soft springs which will keep the Sofnolime in the scrubbers compressed so that free flow paths don't develop if it settles (the scrubbers will be horizontal tubes). 

I know some of you have made your own springs in the past. Any tips on how to do so? Surely there's a little more to it than winding a stainless wire around a cylinder?

many thanks,

Alec

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