Extra Heavy-Duty Shaft That Will Provide The Necessary Reliability Enable Shafts To Handle The Added Torque Requirements Of Increased Capacity Oil Pumps Or Heavy Viscosity Lubricants Made From Premium Grade 8740 And Heat Treated To 190,000 PSI Alignment Sleeve Is Roll Formed Onto The Shaft (Not Welded Or Pinned), Enabling The Sleeve To Float, Allowing For Slight Misalignment