Re: Bronze or Aluminum timing gear
Either gear will rattle if the clearances are wrong, and either will be quiet if they are right. Its not the fault of the gears which are really precision made. After 80 years of wear and re-babbitting the clearances sometimes may be off. Should be .003, .004 max, measured at 3-4 places around the gear. Dan has oversize gears available. Bronze is probably not worth the extra money unless you are going radical with mods.
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