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Mains Jounal Measured with micrometer what colour code is needed ?

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McCabe-Thiele (Ted):

--- Quote from: Bryanj on April 20, 2021, 01:05:44 AM --- I would take the smallest pin size, work out code for that and run in for 500 miles

--- End quote ---

Hi Bryan,

Sorry for my ignorance  - not sure what you mean by the smallest pin size?

Am I right in thinking that as you move down the table the shells are in effect thicker to alow for crank wear or smaller diameters of journal?

McCabe-Thiele (Ted):

--- Quote from: K2-K6 on April 19, 2021, 11:33:10 PM ---Have you got a vernier scale on the mic to give the 3rd decimal place number?

It'll show which way the tolerance is leaning to and help make the decision easier.

--- End quote ---

Sorry it does not have anything beyond the second decimal place its a Moore & Wright new item.

K2-K6:

--- Quote from: Macabethiele (Ted) on April 20, 2021, 09:03:57 AM ---
--- Quote from: K2-K6 on April 19, 2021, 11:33:10 PM ---Have you got a vernier scale on the mic to give the 3rd decimal place number?

It'll show which way the tolerance is leaning to and help make the decision easier.

--- End quote ---

Sorry it does not have anything beyond the second decimal place its a Moore & Wright new item.

--- End quote ---

You can still get indication of if under or over the 0.01 increment.

When you mic the journal, if you have any "traction" as you undo the mic,  then you've probably sprung the gate a very tiny amount. By just touching the contact at very very light sliding pressure, then look at the marking to see if you are above or below the 0.01 mark, even by a small amount.

It can tell you if they are between 0.00 and 0.01 or between 0.01 and 0.02 which will give you the correct position on the colour table.

Bryanj:
When you measured it you said it could fit in two categories, use the smallest of those

McCabe-Thiele (Ted):

--- Quote from: K2-K6 on April 20, 2021, 10:56:26 AM ---
--- Quote from: Macabethiele (Ted) on April 20, 2021, 09:03:57 AM ---
--- Quote from: K2-K6 on April 19, 2021, 11:33:10 PM ---Have you got a vernier scale on the mic to give the 3rd decimal place number?

It'll show which way the tolerance is leaning to and help make the decision easier.
[/quote

You can still get indication of if under or over the 0.01 increment.

When you mic the journal, if you have any "traction" as you undo the mic,  then you've probably sprung the gate a very tiny amount. By just touching the contact at very very light sliding pressure, then look at the marking to see if you are above or below the 0.01 mark, even by a small amount.

It can tell you if they are between 0.00 and 0.01 or between 0.01 and 0.02 which will give you the correct position on the colour table.

--- End quote ---

I have done that now - that thanks. Ted

Settled now on Black, Brown & 3 Green sets of shells - I will plastiguage for peace of mind when I start to rebuild the casing..
--- End quote ---

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