Got a bad squeal on the SP-15. Can’t figure out where the noise is coming from. Suspect that the back roller core is defective and the bearer is not holding it correctly. I think we need a new roller/core. Anyway, in printing the oscillating roller squeals badly. Just started doing this today. Any thoughts? Thanks.
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Dan may be closer than my suggestion.
Are the roller end screws chewing into the blocks? Vandercook used Nyliners with a flange only on one side on the SP-15. It is better to use a pair of Nyliners so you can have a flange on the inside and the outside to protect from metal on metal contact. This will protect your cores, blocks and end screws.
DGM
A video may help. Could the sound be coming from the rider? A dab of Vaseline on the bronze journals might do.