04-19-2016, 03:38 PM
(04-19-2016, 03:15 PM)Vinny Wrote: Are you putting a spring under the plunger in yours? The drawing doesn't show it but it looks like it's designed for one.
Vinny, yes there is a spring under the plunger but I didn't show it because almost any spring will work. I did call out the uncompressed length of 0.940" for a spring so the plunger will extend completely.
I have been collecting springs from all the used up pump/spray bottles we go through. They are typically stainless steel and one of those will fit handily for this application.
The spigot on the bottom of the plunger is 0.188" diameter but it could be smaller to match the I.D. of whatever spring is on hand.
JScott, proud to be a member of MetalworkingFun Forum since Mar 2014.