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my compressor repair
John Rudd:
Thought I'd start a new thread for the repair of my air compressor...
Having bought a new regulator that would not fit or that had useable parts I set about machining a new bonnet for the air regulator.
Having found a sizeable piece of alloy bar and playing around with thread cutting on the lathe, here are a few snaps I took along the way....
The picture below shows the main body of the regulator on my compressor
Now this is the old part of the regulator that I treid to repair but it melted when heated with a torch...( I said torch not flame thrower! )
John Rudd:
Ok next up, I threaded some 32mm dia aluminium bar...Sort of a suck it and see job this...
The dia of the threads measured some 31.6 ish mm, but using metric thread gauges didnt tell me what pitch..None of the usual pitches didnt fit...
I guessed...I measured the pitch with my vernier, sort of around the 50 thou pitch , so I took a stab at 18-20 tpi...No idea what the thread angle is, so I stumped for 60 degrees...( plus I havent got a 55 degree tool )
After a few cuts,
and time for a trial fit...
It might not be perfect but it fits without too much aggro...
John Rudd:
After much more cutting, measuring and cussing...I got this far...
To finish the piece, I need to do a bit of boring for the spring to fit inside, the major hole you can see is for the piston that acts on the reg valve( which is mounted in the main body...)
I think I might make a brass insert to fit in the top and thread that, a bit harder wearing than the ally bar..What do you reckon? Good idea? :scratch:
More to follow...
Time for tea..
arnoldb:
Looks good John :thumbup:
Yes, a brass (or even better IMHO, phosphor bronze) insert would definitely work better and would be smoother in operation as it would not tend to gall as much as the ally either.
:beer:, Arnold
j45on:
Watching with interest John as I think I have the same compressor :thumbup:
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