At 15:52 -0600 20/1/08, Porritt, David wrote: >I use lots of Renner parts and I haven't run into the sized up jack >thing, but my best guess is that it's caused by their ill advised use of >the graphite in their bushing cloth. I wish they'd quit doing that!! I'm right now having to re-centre the hammers from a 20 year-old Schimmel upright a colleague has sent me -- graphited bushings. I tried Protek on one or two of them and this made them stiffer, so I am replacing the pins with pins of the same size. Two or three passes with an almost smooth broach and a smear of deer tallow on the pins is yielding very consistent results and the job will take little over an hour. Graphite seems to me a very bad and totally unnecessary idea, but I was surprised to find it used on a very nice set of grand shanks I got from Detoa last year and haven't yet used. JD
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