<html> Hi Dave,               Something that tight has quite a lot of friction,  friction generates heat,  heat on metal causes expansion.  Does this set of shanks have graphited bushing cloth? Examine the pins carefully for score lines. Just a random thought. Roger At 05:47 PM 6/14/02 -0500, you wrote: <blockquote type=cite class=cite cite>OK all you engineer types.  I was repining some hammer flanges today on a Steinway that has been in a practice room.  Action parts are Renner.  It gets hard play 14+ hours a day.  The action was rebuilt 4 years ago.  Nearly all of the bushings were quite tight -- most 1 or 2 swings.  A few had 3 swings and I was pinning for 4 so since the action had been in the shop (idle) for a couple of weeks, I thought maybe I could just vigorously work the shank a few seconds and it would swing 4.  I'd hold the flange and make the hammer swing back and forth fairly forcefully for 5 or 6 seconds and then test it again.  In each case the ones that previously would give 3 good swings, now only gave 1.  The hammer dropped from horizontal to vertical and stopped dead.    What made the bushings get tighter by simply working the flange?  I'm stumped!   dave <pre> _____________________________ David M. Porritt dporritt@mail.smu.edu Meadows School of the Arts Southern Methodist University Dallas, TX 75275 _____________________________</pre></blockquote> <x-sigsep></x-sigsep> Roger</html>