The letter locations should be listed near the chart, next to the place where you'll be sticking the change gears (crap whats that called?) or in your two page, changlish "user manual" The way my BS chart reads, a 27 tooth gear goes in location A, a 64 tooth gear goes in location B, etc. We find the 18 TPI on the chart (it could appear more than once if there is a high/low feature) and then moving across the chart there are a bunch of numbers that correspond to the number of teeth on the change gears. For this imagninary lathe, lets pretend like we want 18 TPI. Some gearboxes don't have the high/low feature so in those cases you'd just have one TPI listed. Usually, you will have two TPI corresponding to either a high or a low on the gear box. (I just completely made up those numbers mind!) Unfortunantly, where the gears go and the appropriate gears to use are generally specific to the manufacturer.īasically, your chart should have something like
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June 2023
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