When I tighten the mandrel shaft nut that holds the upper pulley on a Columbia HG cylinder machine, the mandrel also tightens and won't turn freely. (Columbia pulleys don't have set screws like Edisons). This looks pretty simple, so what am I missing here? Thanks. Ray From [email protected] Sun Sep 25 15:26:47 2005 From: [email protected] (George Vollema) Date: Sun Dec 24 13:11:00 2006 Subject: [Phono-L] Columbia phono question References: <001a01c5c213$5171d930$6101a...@wilenzick> Message-ID: <067d01c5c220$38a9a0b0$e2a14...@office>
It's been a while since I worked on one, but you have to have the right shims (washers) in order to tighten the pulley w/o tightening the whole mandrel. In other words it has to be built up enough as that when the pulley nut is tight the distance between the mandrel shaft stop (step) and the pulley is slightly greater than the distance between the ends of the housing it slips through. It can be tricky if some are missing. Great Lakes Antique Phonographs George Vollema ----- Original Message ----- From: [email protected] To: [email protected] ; [email protected] Sent: Sunday, September 25, 2005 4:54 PM Subject: [Phono-L] Columbia phono question When I tighten the mandrel shaft nut that holds the upper pulley on a Columbia HG cylinder machine, the mandrel also tightens and won't turn freely. (Columbia pulleys don't have set screws like Edisons). This looks pretty simple, so what am I missing here? Thanks. Ray _______________________________________________ Phono-L mailing list [email protected] Phono-L Archive http://www.oldcrank.org/pipermail/phono-l/
