Author Topic: Twin Oscillators  (Read 2386 times)

Online Jo

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Re: Twin Oscillators
« Reply #45 on: May 14, 2019, 04:56:23 PM »
Coming along well Jo, When you go to show it off to your supplier could you enquire how his No1 is going or not?

I was planning on doing that tomorrow when I visit him  ;) He had been using the excuse that for months he had been waiting for a replacement Eccentric strap casting to turn up.. When I mentioned he could give them a  :stickpoke: at the Harrowgate show it had suddenly turned up the day before  :noidea:

Jo
Usus est optimum magister

Online Jo

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Re: Twin Oscillators
« Reply #46 on: May 15, 2019, 06:21:53 PM »
The latest on Eric's Stuart No 1 was: " I'll be getting back on those shortly".   I don't think any parts had moved since last time I visited  :disappointed:


He is now regretting letting me have the Blackgates castings, he is almost as difficult as Surus to recover your engine from when you take one round to show it to him  :ShakeHead:

Jo
Usus est optimum magister

Online Jo

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Re: Twin Oscillators
« Reply #47 on: May 17, 2019, 02:57:37 PM »
The cylinder ends come out of a nasty bit of bronze. Each piece was nearly enough to make a spare cover if needed. As is traditional I like to use as little material as possible so I chose to make the lower covers back to back and then part them off. Did I mention nasty bronze  :facepalm: it was none too happy at being parted off with a cheap as chips Chinese parting off carbide tip.

The other covers were turned to fit into the cylinders from the provided bronze  then parted off at 4mm total thickness and held on the 0.8mm long flange to machine the top of the covers. The three holes were put into the covers using my dividing head at the correct distance only to find that the slots in the cylinder are not supplied deep enough  >:( so they had to be hand filed out.

One cylinder done the second one to go. The spare piece of bronze has been added to the come-in-handy drawer  :)

Jo
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Offline b.lindsey

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Re: Twin Oscillators
« Reply #48 on: May 17, 2019, 03:02:07 PM »
Those still came out nice Jo! One can never have too much bronze in the come in handy bin...nasty or otherwisei  ;)

Bill

Offline AOG

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Re: Twin Oscillators
« Reply #49 on: May 17, 2019, 03:15:21 PM »
I feel your pain Jo. I had to do the same thing on mine.

Tony

Online Jasonb

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Re: Twin Oscillators
« Reply #50 on: May 17, 2019, 03:40:29 PM »
Is it the photo or is your insert not parallel to the holder, looks to be pointing to the right. Parting a large dia while holding by a small spigot will always be "interesting"

Also a MGGN will be better than a MGMN on non ferrous