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John Wrennall wrote:My very early attempts at making bulkheads before I bought a lathe, definitely possible.
I see that most bulkheads have seals which seal in either the radial or axial direction so here is a variation.
Two discs turned to fit inside the tube as normal, 1 drilled and the other drilled and tapped to allow them to be fastened together. Ignore the centre mandrel holes.
Note the chamfers on the adjoining faces of the two discs, this is turned to suit the O ring.
After greasing and assembling, slide into tube and tighten screws(Allen screws better). This compresses the o ring via the chamfer and it grips the inside of the tube.
Small O rings under the Allen screw heads completes the sealing.
This is probably more complex than a 'standard' bulkhead but it may be that someone can find a use for this idea....
An addition to the original post now that I have decided on a use for this adjustable bulkhead...
I always seem to make a "pigs ear" of cutting large diameter tubing square and have now fitted the adjustable bulkhead onto a mandrel to enable it to be held in the lathe chuck. My chuck is too small to take the tube directly. This enables the ends of the pipe to be skimmed square.
A second unit is currently being made with a central bearing to allow alignment with the lathe tailstock.
Hope this may be of help to anyone who makes their own cylinders.
John
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