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by jj.palmer
Tue Mar 31, 2020 12:47 pm
Forum: Main Chat Forum
Topic: 5 tpi Plastic Thread
Replies: 14
Views: 568

Re: 5 tpi Plastic Thread

Hi Bob, it all started sometime ago at the Notts/Derby branch meeting, a member who is renovating a 1920's James vee twin m/c was having difficulties in obtaining a "Bendix type drive" part that operates the clutch push rod, see sketch of original design. The old one had worn out, more com...
by jj.palmer
Mon Mar 30, 2020 12:01 pm
Forum: Main Chat Forum
Topic: 5 tpi Plastic Thread
Replies: 14
Views: 568

Re: 5 tpi Plastic Thread

As promised, a method of indexing on a lathe to enable holes to be drilled reasonably accurate for position, see pics. It utilizers a 200mm dia. 360 degree protractor through a reduction gear of ratio 1:0.4444 which results in an accuracy of +- 0.05mm(.002 inch) when drilling holes in a a part of 25...
by jj.palmer
Sat Mar 21, 2020 10:38 am
Forum: Main Chat Forum
Topic: 5 tpi Plastic Thread
Replies: 14
Views: 568

Re: 5 tpi Plastic Thread

Brillient, I find that the mini lathe, if used with respect to its size and power, is a great machine for what it costs and the space that it takes up. Currently I am carrying out a modification to enable the chuck to be angularly indexed so that holes may be drilled reasonably accurate for position...
by jj.palmer
Mon Feb 24, 2020 10:13 am
Forum: Main Chat Forum
Topic: Tight front wheel spindle
Replies: 8
Views: 257

Re: Tight front wheel spindle

To assemble the spindle into the hole is it possible to insert the pinch bolt from the opposite side and with a piece of steel plate in the slot slightly open out the hole by tightening the pinch bolt, just a thought.

John P.
by jj.palmer
Sat Feb 22, 2020 10:47 am
Forum: Main Chat Forum
Topic: 5 tpi Plastic Thread
Replies: 14
Views: 568

Re: 5 tpi Plastic Thread

Simon, Material - I use Delrin (acetal) which is free cutting, it comes in a variety of colours, see ebay, have used it many times, you may have to check how it is with petrol. Change gears - goto "Change gears for threading - little machine shop" it calculates the change gears for mini la...
by jj.palmer
Thu Feb 13, 2020 8:01 pm
Forum: Ariel Talk
Topic: Cartridge type oil filter on KH500.
Replies: 25
Views: 1378

Re: Cartridge type oil filter on KH500.

Paul, looks a very sturdy sump plate, much better than the original pressed steel ones which I still have fitted, I bet it seals much better. What I am endevouring to do is to positively direct the oil flow to within the magnets "magnetic field" of operation rather than leave it to chance ...
by jj.palmer
Wed Feb 12, 2020 11:54 am
Forum: Ariel Talk
Topic: Cartridge type oil filter on KH500.
Replies: 25
Views: 1378

Re: Cartridge type oil filter on KH500.

The magnet within the oil tank mesh filter seems to be working ok, the pics. show the one from my NH350, their advantage is that they can be removed, cleaned and refitted within a matter of minutes. I am now wondering whether it can be moved more towards the top of the filter, rather than be at the ...
by jj.palmer
Fri Feb 07, 2020 11:44 am
Forum: Ariel Talk
Topic: Cartridge type oil filter on KH500.
Replies: 25
Views: 1378

Re: Cartridge type oil filter on KH500.

And just to complete the oil filtration story, sometime ago I had to make a new oil tank mesh type filter so I took the opportunity to fit a "pickup" magnet into the bottom of that, see pics, belt and braces me :oops:

John P.
by jj.palmer
Fri Feb 07, 2020 11:22 am
Forum: Ariel Talk
Topic: Cartridge type oil filter on KH500.
Replies: 25
Views: 1378

Re: Cartridge type oil filter on KH500.

Paul and others thanks, education is a journey that you will never complete. Currently I have no problem with overoiling the rockers even though they are supplied from the pressure pump, there is a restrictor in the banjo connection, will keep my eye on it though, thanks again. John W, I am hoping t...
by jj.palmer
Thu Feb 06, 2020 1:23 pm
Forum: Main Chat Forum
Topic: Another supercharged Square 4
Replies: 2
Views: 250

Re: Another supercharged Square 4

Alan, a very good read, as a Rolls Royce test engineer during the war years of 1940/45 Richard Foster Pegg (RFP) would have been employed on the Nightingale Road site in Derby testing the now famous Merlin engine, as fitted to the Spitfire etc. He would have been under the directive of Stanley Hooke...

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