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Old 15-03-2010, 16:41   #16
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Maximum clearance in any direction between flange and coupling is 1/3,000"

you do mean .003.....I know you do......
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Old 15-03-2010, 17:16   #17
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Thanks Chief - I do mean .003 - I had forgotten how to write 'three thou'
I looked at it several times and gave up !
Richard
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Old 15-03-2010, 18:23   #18
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the tolerance for the face to face match of coupler flanges is 0.001" per 1" of diameter of the coupler.
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Old 15-03-2010, 18:39   #19
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That's ok

I knew 'zactly what you meant.

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Thanks Chief - I do mean .003 - I had forgotten how to write 'three thou'
I looked at it several times and gave up !
Richard
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Old 15-03-2010, 19:28   #20
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Coupling Tolerance Formula

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Originally Posted by never monday View Post
the tolerance for the face to face match of coupler flanges is 0.001" per 1" of diameter of the coupler.
Never Monday,
Thanks for the formula - as the gearbox flange diameter is 3.94" for which Aaron can use 0.004" as the clearance (instead of the 0.003" first suggested)
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Old 15-03-2010, 20:22   #21
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Aaron,
Noticed from one of your earlier posts that you intended to replace the engine mounts. Well a word of caution : once you have aligned the gearbox flange with the propshaft coupling to your satisfaction, run the engine in gear, then leave it for a few days. Then uncouple the shaft from the gearbox and re-check the clearance. This is necessary in order to make sure that engine has not settled into the engine mounts and thereby altering the coupling/flange clearance.
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