The 200mm 4-jaw I recently fitted to my lathe has been giving me a bit of grief, and it turns out that the jaw surfaces used for gripping pipe/bar (the full length jaw surfaces) are meeting at the rear of the jaws leaving a gap at the front. The gap is 13 thou on one pair, and 15 thou on the other pair.
Is that considered acceptable? If not, how do I go about fixing this please?


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