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As others have said, what brand and model is the lathe? Without knowing that, there is no way to be certain of the spindle type, but I have a real sneaking suspicion it is a threaded spindle (most small lathes are and this would only be 8" swing). That said, putting it in back gear with the pin locked and smacking a bar with a hammer is a sure fire way to A) break the pin, or B) shear off a tooth on the backgear (some of you got lucky, but sooner or later it will). There are better ways to loosen that chuck. This same queston came up recently on one of the machine forums (PM). One of the guys there had the best suggestion I have ever heard. Make a clamp similar to the big end of a connecting rod that fits the back end of the spindle tightly. If it wants to slip, a little locktite will put a stop to that. NOW put your bar in and whack it with a hammer. You're not going to break anything and the loctite is easy to get loose once you relese the bolts on the clamp. BTW, not ALL L&S lathes had the threaded nut on the back (L-series tapers). I have an 18"er made in 1918 that has a huge threaded spindle (5 3/4"x6TPI threads), but reverse to the typical South Bend... the female threads are in the spindle, which is cup shaped. The male threads are on the back plate. This was the fore-runner to the L-series mount. A 1969 L&S is far from old in my book, btw! I'd love to have one that new. Had to pass on a 69 1408 AVS because it was too far away. Maybe I'll find one close by one day.
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