Sort of hard to do at this point, but a seamstress tape wrapped around the pulleys does a good job of measuring the needed belt length, just subtract enough for tensioning or block the motor side pulley where you want it under tension and then use the tape. Even a piece of string and a tape measure will work.
SuperTroye, Been following this post, and probably should have spoken up sooner. I have a 12" logan, so wasn't sure If they were all the same, but your last post tells me they are. 4 years ago when I got my first lathe (had never even seen one up close before), the logan 2557, it came with a 6" 3 jaw chuck. Was recuperating from hip surgery, so spent a lot of time reading everything I could find about my lathe. I happened to read an add on a used tool site selling chuck adapter plates. It said that there 2 1/4 " X 8 threaded plates would fit all lathes with 2 1/4" threaded spindles EXCEPT LOGANS, and for Logans the adapter would simply have to be screwed on backwards (with a spacer to seat against the spindle register face and adapter plate), and a few thousandths taken off the ID of the plate register. As soon as I could get around again, I went out and checked, and sure enough my chuck was hitting the horizontal part of the register rather than sliding on to it, just like yours. When taking chuck and adapter plate apart to turn the register I saw that the plate was stamped Southbend which explained why it didn't screw on all the way. I didn't respond sooner because figured it was only on the larger spindles, but apparently they did this on all there lathes. Don't be afraid to do this !! This is the very first thing I ever did on any machine tool in my life, and it came out perfect, thanks of coarse, to the great guys on this forum who talked me through every step. JUST REMEMBER, make sure that both ends of the spacer you make are true to each other, as you can't trust the threads to hold the plate true. If there is anything I forgot please ask, and sorry I waited so long to respond. Happy Machining, JR49
