ST beam engine

ST beam engine

This topic has 9 replies, 6 voices, and was last updated 10 July 2016 at 16:34 by Billy Bean.

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26 April 2016 at 11:09 #236269
phil burley
Participant
@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
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26 April 2016 at 11:09 #3284
phil burley
Participant
@philburley12227
26 April 2016 at 11:15 #236270
RICHARD GREEN 2
Participant
@richardgreen2
I didn.t know Andrew Smith was eccentric !
26 April 2016 at 11:43 #236273
BC Prof
Participant
@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
26 April 2016 at 11:43 #236274
Ian S C
Participant
@iansc
Might have missed a comma.

Ian S C
26 April 2016 at 12:06 #236276
phil burley
Participant
@philburley12227
true sorry !!!!!

phil
26 April 2016 at 12:40 #236280
phil burley
Participant
@philburley12227
oh yes I see . I could alter the length on the rocking lever to get it right if needed

thanks Phil
10 July 2016 at 14:44 #246112
Billy Bean
Participant
@billybean67480
Same query – Stuart advise 9/16 is correct.

My Stuart drawings that came with the castings shows 11/16.
10 July 2016 at 14:57 #246113
JasonB
Moderator
@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
10 July 2016 at 16:34 #246117
Billy Bean
Participant
@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.
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