Rex, I have a stash of gears including some from SB lathes. The gears I have are 24, 26, 30, (2) 32, (3) 40 and a 42 tooth, all of the sets sold last year. Just to check, the gears are 1/2" thick with a 5/8" arbor. These were school lathe parts from the 70's that were in storage since and show little use. Let me know if any of these are of use to you. Most school lathes in this era had gearboxes, I'm not sure how they wound up in this basket. Have a fair amount of gearbox gears left.---David