Injectors

[Ron HancockParticipant @ronhancock63652]

So small how on earth do you manage to machine these so small.

I don't know how you have the patience and skill to make these so difficult.

Can't wait to try mine when you get time to fix for me to have two that will work after will be a dream and well worth waiting so long for the to have piece of mind after

Ron

[Ron HancockParticipant @ronhancock63652]

cones

[maurice bennieParticipant @mauricebennie99556]

Hi All , I am not a steam engine(on rails )maker , but small needles are made for Amal carbs in many sizes, could these not be used ? Just a thought.

Maurice.

[nigel jones 5Participant @nigeljones5]

have I missed something here?

[Nick HulmeParticipant @nickhulme30114]

Posted by fizzy on 12/06/2017 16:19:18:

have I missed something here?

Yeah, that chuck is part of a really old-school 3D Printer 😀

[julian atkinsParticipant @julianatkins58923]

Ron has shown one of my album pics which is a simple test of concentricity of drilling for in this case a new steam cone with the lathe running and the drill in the drilled hole absolutely true. Probably a 1mm drill.

The particular problem with Ron's commercially recently bought injectors from reputable ME commercial suppliers is quite simply that they are 'crap' and wont work as sold. That is a damning indictment on the current rubbish peddled by the trade, except for one supplier namely Pavioursteam (usual disclaimer).

Ron is not alone in this respect as I have previously been sent 4 of these examples to try and rectify prior to Ron's 2 examples, and in each case I have told the unfortunate buyers that they are 'bin jobs' and not worth the effort to rectify if indeed this was a realistic prospect. I have been sent a further example today from Australia but bought in the UK. The one of this type that I did try and sort out created a great deal of work in time and effort that on test was as expected very poor performance wise and although worked in a fashion was not to the sort of standard I would regard as acceptable.

The particular problem with these injectors is the very poor combining cones. As per Derek Brown, if new combining cones are required it is a 'bin job' and not worth the effort for us amateurs. I dont mind making new steam cones and delivery cones to someone else's injectors but making new combining cones to fit into a foreign body is fraught with problems and usually unsuccessful.

Cheers,

Julian

Edited By julian atkins on 13/06/2017 23:56:48

[Neil WyattModerator @neilwyatt]

I've moved the thread, I'm not sure we are ready to 3D print injectors in our workshops – yet!

Neil

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Neil Wyatt on 14/06/2017 15:20:39:

I've moved the thread, I'm not sure we are ready to 3D print injectors in our workshops – yet!

Neil

.

I think it safe to say that injectors present an ideal task for analogue machining.

MichaelG.

[Author]

Posts