On Sun, Apr 5, 2020 at 03:31 AM, Robert Downs wrote:
With the exception of the two spindle belts on the late 12¡± cabinet models, all of the Atlas built metal working lathes were originally designed so that if the motor was mounted in the proper location, slackening the belt tension lever or rod loosened both belts for changing spindle speeds.
Not entirely correct, depending on how one chooses to define "proper location." Models on which the countershaft bracket L3-20 (with motor base 9-22 or 9-22A) is mounted directly to the back of the lathe bed the motor belt tension is fixed separately from the countershaft-to-spindle belt tension. Please refer to the illustration attached. This illustration was clipped from the operation and parts manual for Craftsman 101.07403 model lathes.
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Loosening the lock-nut 9-42 will release the motor lock bolt but the weight of the motor will hang on the belt keeping it tensioned when not in use.
Raymond ?
Raymond
