10 inch Refractor Renovation - Al-Paslow
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The declination shaft. interesting to note some items here. First the shaft comes together in two parts. First is the larger portion where the bearings fit. This is made of aluminum. The other part consists of a smaller shaft made of stainless steel that screws into the larger shaft. The stainless steel portion is the one that attaches to the counterweight system and everyone can see from the outside. The aluminum shaft appears to be of sloppy tolerance and bearing fit. There is a thin teflon disk which can be seen in this image which is against the large aluminum disk. This telfon disk also acts as a clutch.
It has been determined by myself and confirmed by others that the shaft is 3 to 4 thousandths out of round at the bearing. This is unacceptable for astronomical purposes!! The telescope will bind in some spots and become too loose in others, depending on the moment arm of the telescope tube. Additionally the issue was resolved by Parrallax. This is a obvious problem  with Joe Nastasi's machine work.

The declination shaft. interesting to note some items here. First the shaft comes together in two parts. First is the larger portion where the bearings fit. This is made of aluminum. The other part consists of a smaller shaft made of stainless steel that screws into the larger shaft. The stainless steel portion is the one that attaches to the counterweight system and everyone can see from the outside. The aluminum shaft appears to be of sloppy tolerance and bearing fit. There is a thin teflon disk which can be seen in this image which is against the large aluminum disk. This telfon disk also acts as a clutch.
It has been determined by myself and confirmed by others that the shaft is 3 to 4 thousandths out of round at the bearing. This is unacceptable for astronomical purposes!! The telescope will bind in some spots and become too loose in others, depending on the moment arm of the telescope tube. Additionally the issue was resolved by Parrallax. This is a obvious problem with Joe Nastasi's machine work.

problem Joe Nastasi's machine work Joe Nastasi badterrible design HD 300 mount Parrallax Instruments