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Let's see... since you did your Shay you've only completed another 143 metal working projects, several dozen carvings, nine RC Submarines, and multi-dozen other projects... and you didn't remember if there was an o-ring? I don't think you need to worry about your memory, Chris! You remember more about projects you did 7-8 years ago than I do about the one I'm doing right now! Kim
Nice work. I was also working on the pump body this weekend. What a stressful part as there are some tricky (to me) steps and a lot of time and material $ goes into the pump body. Unfortunately I could not hold the 0.375 cylinder bore on my sloppy 7” lathe. I ordered some 10mm 303 stainless stock that I’ll need to turn down a hair to save this assembly. You did a really nice job on this, and are flying compared to me!
Great progress Kim - hope you dont make the mistake I did on first pump, and you use stainless spring and ball bearings! Mine worked at first, then rusted. Got right materials for reworking it.
Thank you for the info, Achim! I'm wondering if there's any US distributor that has those Silicon balls? Those look like they'd be really good for these type of ball-check valves.I did use a D-bit to create the seat, so hopefully it looks like the more ideal case in your excellent drawing. But it can be hard to get a good, smooth seat there. I may see if I can find some of those balls like that.Thanks,Kim