T i m Wrote in message:
On Thu, 23 Feb 2017 17:10:26 +0000 (GMT+00:00), jim k wrote:

bar shower developed a continuous drip from the 1/4 turn flow
valve. Got a tuit so pulled out the old to measure & get a
new.

Oh dear. No online source had the same spec. Nearest was very
close but the splined head of the spindle was 7.6mm, diameter of
my original dud was 9.8mm....

For 7 quid posted I ordered one yesterday & it arrived today (tap
magician, eBay).

So out with the polymorph

https://www.amazon.co.uk/gp/aw/d/B017SA92O4

and ten minutes later I had moulded myself a bush to enable the
smaller replacement spindle to fit snugly & exactly into the the
shower control knob.

All back together & job done! Assuming the shower doesn't get
above 60deg all should be ok :-)

Result IMHO.

Anything that works and lasts can be considered 'a result' I'd say.
;-)

How long is "last"?

Had the relative diameters had a slightly bigger I think I would have
3D printed a converter collar [1] and PLA is probably good for 150
DegC (it's extruded at 200 DegC).

That said, if these were splined (rather than with flats / D section)
I'm not sure you would get sufficient detail to print the splines
without going down to a very vine nozzle (currently .5mm).

Splined (as per op).

A metal spindle would probably cut it's own into the inside of the
collar but the collar to plastic knob might need gluing (or melt
tacking) in to be sure.

It would need to be removable for the next time the valve fails...

You could print a complete new knob of course. ;-)

In chrome?

Interesting but sounds like a lot more work & kludge along the way?

Open (free) Sketchup (Windows and Mac only I'm afraid)

Eh? I run Sketchup on Ubuntu with Wine
;-)
--
Jim K


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