Water stuffer questions....

[anylizer]

So I decided to build a water stuffer after reading about them on here. I have the 4" PVC, and the necessary ends to build it, along with multiple size horns for stuffing.

 I noticed that the inside of the PVC is not remotely close to being consistent in diameter ( very wavy). So my question is, how much difference is there in the diameter of the piston as compared to the I.D. of the pipe? I am machining the piston now, so any help is greatly appreciated! 

Thanks

Tim

 

[daveomak]

Tim, morning....   The diameter thickness of the o-ring and it's durometer determines the piston/cylinder tolerance... A 1/4" thick o-ring (0.275) with a durometer of 70 has a clearance tolerance of 0.016"....

I would consider finding another pipe for a cylinder.... maybe schedule 40 or maybe even 80....  find an extrusion that is smooth....  They make Lexan pipe that is smooth....  It will save you a heap of headaches in the end solving that problem now....

 

[boykjo]

 

 

[anylizer]

thanks guys... I found the specs for o-rings & grooves. Need to find a smoother pipe, I guess!