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9A apron worm end play


 

Hi guys,
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I been following some interesting and informative posts and now I have a question of my own.
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What is the acceptable end play for the worm in a 9A?
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With the holes in the key slot and nut aligned, the worm is so tight it can't rotate, and in the next looser position it has about 0.075 end play.?Is that acceptable? If not, I don't see how the holes can align and the worm not be way too tight.
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Thanks!
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Jan

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