Gear wear on my lathe
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---------------- Don, this would be a great plan except that the two twin gears have differing number of teeth. The left one is 32, the right 28. This threw me at first, but the gearing works out the same. Thanks, Steve DoN. Nichols wrote: According to Harold and Susan Vordos : "Steve Smith" wrote in message ... I clearly need to replace some gears on my lathe, the question is how many? There are four gears showing signs of wear, one of them really bad. Replacing all four gets pretty expensive. The lathe is a 14 1/2" Southbend. [ ... ] Unless you're loading those gears heavily, I'd run them and not worry about it. I would imagine it has taken years for them to wear to the point shown, and were probably run far more then than you use them now. You could conceivably have years of service left. I would in general agree, except that there is one simple (and cost-free) step to postpone the day of needed replacement for quite a while. Note that of the twin gears, the one which is badly worn is the one which is *always* in mesh with the "cone pinion", and transmitting motion to the rest of the gear train, either directly, or (when in reverse feed) through the second gear of the pair. What I would consider doing is to interchange the two gears of that pair, which would put the most subsequent wear on the relatively un-worn one of the pair, and transmit power though the more worn one only during reverse feeds or LH threading. And -- make sure to keep them well lubed, of course. Good Luck, DoN. |
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