territorialmillworks Posted October 14, 2011 Share Posted October 14, 2011 Current setup is 2.5" X 10 air cylinder at 90PSI with a ram/die weight of 72#. Current cyclic rate 148 BPM approx. The ram is 1/4 x 4 sq tubing with 1" thick caps on both ends. I've thought about removing the caps and welding an additional 30# to the inside of the sq tube to increase efficiency. But how much will this decrease the cycle rate? I'm thinking the down stroke will be slightly faster but the upstroke would be considerably slower...an assumption based on nothing more than 'gut' feeling. I know this is one of those 'wide open' questions with a lot of variables but I'd appreciate any and all thoughts. THX, Keith Quote Link to comment Share on other sites More sharing options...
ciladog Posted October 14, 2011 Share Posted October 14, 2011 Your 2.5" cylinder at 90 psi developes 442 pounds of force. I don't thing increasing the ram weight, as you discribe, will effect your BPM much at all. Quote Link to comment Share on other sites More sharing options...
JNewman Posted October 14, 2011 Share Posted October 14, 2011 I increased my hammer from 50lb to 100 and increased the cylinder size from 2" to 2 1/2" several years ago. I assumed it would slow it down. It actually sped up and seemed to use a little less air! I don't think you will have the same reaction but I don't think it will slow it down much if at all. Quote Link to comment Share on other sites More sharing options...
macbruce Posted October 14, 2011 Share Posted October 14, 2011 If possible I would try a test run first......If you can add 30 lbs without tearing it apart by welding or bolting the weight on the outside first you'd get a preview of what's gonna happen with the bpm. I suspect it will slow down.....If you're going to try forging with it on there make sure it's SECURE. I need not say why....... Quote Link to comment Share on other sites More sharing options...
KST1-Derek Fultz Posted October 14, 2011 Share Posted October 14, 2011 Could you drill and tap some holes in the ram, fill it with lead shot, then plug? That way if you don't like the effect, it's easy to go back. On a related note, I've often wondered if a hollow ram filled with lead shot and oil would work like a dead blow hammer. And if this would be beneficial at all. -Derek Quote Link to comment Share on other sites More sharing options...
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