ST beam engine

[phil burleyParticipant @philburley12227]

Hello , I am building a Stuart Turner beam engine , I have got to the eccentric Andrew Smith's book says make it off centre by11/64 but the drawing says 9/64. Can anyone tell me which is correct please

Regards Phil

[phil burleyParticipant @philburley12227]

[RICHARD GREEN 2Participant @richardgreen2]

I didn.t know Andrew Smith was eccentric !

[BC ProfParticipant @bcprof]

I am pleased that you could read the drawings in the book . Mine was too badly printed to do so.

Mk 1 eyeball gave me 5mm eccentric ( 10mm throw ) with a 14 mm between centres operating arm.

If you find that the throw is too big you can easily adjust the length of the operating arm .

Brian C

[Ian S CParticipant @iansc]

Might have missed a comma.

Ian S C

[phil burleyParticipant @philburley12227]

true sorry !!!!!

phil

[phil burleyParticipant @philburley12227]

oh yes I see . I could alter the length on the rocking lever to get it right if needed

thanks Phil

[Billy BeanParticipant @billybean67480]

Same query – Stuart advise 9/16 is correct.

My Stuart drawings that came with the castings shows 11/16.

[JasonBModerator @jasonb]

Mine seems to run OK on 9/32nds movement (9/64" off ctr)

9/16" would put the hole outside the eccentric

 

Edited By JasonB on 10/07/2016 15:08:36

[Billy BeanParticipant @billybean67480]

Apologies – senior moment.

9/16 and 11/16 should read 9/64 and 11/64

Jason is correct, 9/64 is what Stuart confirmed – they did say that the drawing was incorrectly dimensioned at 11/64.

[Author]

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