Danny D Posted January 28, 2006 Share Posted January 28, 2006 I am rebuilding a 100# Erie steam hammer. I need to hone the cylinders that the throttle valve and the motion valve run in. That means I will need to build up the valve bodys and machine them to fit the larger cylinders. What should I build the bodys up with? Babbitt? Aluminium bronze? What should the clearence in the valve cylinders be. I will be running it on air. I am thinking of using 4140 turned, ground and polished to make a new rod. Erie originally used 4340 for the rod. What should I use for piston rings? Quote Link to comment Share on other sites More sharing options...
HWooldridge Posted January 28, 2006 Share Posted January 28, 2006 Grant Sarver knows a great deal about this - I think he has done it a couple of times. Not sure if he's a member here but does post occasionally across the street on Sparky's site. Memory serves that there was a recent discussion about this very subject. As I recall, the tolerances should be very tight because air doesn't build the "ooomph" that steam makes. Steam runs with relatively loose tolerances because of the heat - air needs good sealing surfaces. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.