3 Step 5/16" Pulley for Threaded GlockCNC.com Spindle - These will only fit the older style standard bore spindles with threads along the entire back end of the shaft. These will not fit spindles with smooth back side of the shaft.
This pulley is specifically for our GlockCNC.com standard bore headstocks with the threaded back end. We have very few of these left. We made these to use with 5/16" V belts. We also offer Power-Twist 5/16 belt for these at $19 Per Foot. If you want to use the Power-Twist belt, you might want to wire wheel or sandblast the pulley grooves to give it a little extra grip.