Here is a trunnion blade drive arbor and double belt pulley that came off of a 1957 Atlas Press Co. saw, model 3021.  Reference pic.8 for saw i.d. model number.  The arbor is tested and in good usable condition.  It does show some years of use and normal wear.  The bearings are pretty smooth and tight. It worked well on the saw trunnion.  The dual belts will engage the pulley strongly and still worked well on the saw.  The arbor threading is in good shape and will tight the blade securely.  This is still a very usable trunnion arbor for that vintage Atlas 8" saw.  This is a difficult to find, rare, OEM part.  Especially, an assembly that is in usable shape anymore.  You are getting everything you see in the pictures.  Please look at the pictures.  Ask any questions that you might have.  Paypal payment due with 48 hrs of auction ending.  Carefully packaged and quickly shipped.  Thanks for looking.