The M40 cannot supply 14 tonnes of force on 2500PSI anyway. the bore of that ram is 40mm so at 172Bar (2500psi) gives 21893.30214 Newtons of force. Thats about 2234 kg or 2.23 Tonnes of force. To achieve 14 tonnes of force on a 40mm bore ram you would need 16170 PSI of pressure.

http://www.pneumaticsonline.com/Calc5.asphttp://www.pneumaticsonline.com/Calc5.asp

(Message edited by leorcc on August 18, 200