Welcome! Log In Create A New Profile

Re: Stephenson valve gear question

Forum List Message List New Topic Print View

Kelly Anderson

September 30, 2019 10:39AM

Registered: 16 years ago
Posts: 1,990

Look in Machinery's Handbook under "fits, running". Stephenson valve gear wants to err on the loose side even when new, so an RC 9 fit is in order for these very large bearings. RC 9 equals .025 to .051 of clearance for diameters ranging between 15.75" to 19.69". The RC table is really a very loose guide, but it's better than nothing. IIRC, we have aimed for .040 clearance for eccentrics about in that size range.

Reply Quote

Message List Previous Message Next Message

RSS

Subject	Author	Posted
Stephenson valve gear question	Murph	September 29, 2019 11:05PM
Re: Stephenson valve gear question	Kelly Anderson	September 30, 2019 10:39AM

Sorry, only registered users may post in this forum.

Click here to login

488 stops for water at Los Pinos tank on closing day Oct. 1979. Photo courtesy Don Richter

The NGDF was started by Don Richter and is currently operated in his memory by Nathan Holmes and others. Others who have contributed to the upkeep of this board are (in no particular order): Charles McCandless, Everett Lueck, Ted Wilton, Cole Adams, James Bane, John Moellmer, Jon Bentz, Linn Moedinger, lloyd lehrer, Rod Jensen, John Craft, Steven Forney, Herb Kelsey, Bill Ramaley, Russ Sperry (El Russo Loco), Josh McNeal, John West, Jim Armstrong, Bob Bergstrom, Greg Scholl, Blake Forbes Doug van Veelen and Mark Fuller.