In order to predict the vibrationlevels caused by a Delmag D62 & D80 or D100 diesel hammer, I am looking for technical data especialy the energy per blow. In Europe this is given in Nm (Newtonmeter). I have found data on www.pilemac.com but they give the energyblow in lbs. Is it possible to calculate the energyblow from lbs to Nm? Has anyone vibration-info of the mentioned hammers?