Hydraulic wrench pressure vs. torque chart
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I’m looking for a conversion table between the pressure applied by a hydraulic wrench and the resulting torque. We lost our manual after so many years; therefore, I need this table as a reference. Thank you!
The tightening torque should be 70% to 80% of the bolt’s minimum breaking strength; in a lubricated environment, it should be 80% of the bolt’s strength, and in a non-lubricated environment, 70%. The torque required by each hydraulic wrench varies, but the strength of the bolt material remains constant. Pressure = Bolt strength * 0.7 / Torque of the wrench = Pressure shown on the pressure gauge