145 PSI TWIN CYLINDER CAST IRON AIR COMPRESSOR PUMP for 3 HP MOTOR. 145 PSI TWIN CYLINDER CAST IRON AIR COMPRESSOR PUMP. Single stage twin cylinder pump fits compressors from a wide selection of manufacturers. Requires a 3 HP motor. Rated pressure: 145 PSI. Pump speed: 655 RPM. Air Outlet: 3/4-14 NPT. Type 1A Flywheel: 12-1/2” with single V-groove (A 1397 belt). Cylinder bore: 2.5. Piston stroke: 1.19. Four 3/8 diameter unthreaded mounting holes. Mounting pattern: 5-11/16 x 7-1/4 center-to-center. Base dimensions: 8-1/4″ x 6-3/4″. Track Page Views With. Auctiva’s FREE Counter. The item “145 PSI TWIN CYLINDER CAST IRON AIR Compressor PUMP for 3 HP MOTR New $0 ship’g” is in sale since Sunday, March 6, 2016. This item is in the category “Home & Garden\Tools & Workshop Equipment\Air Tools & Air Compressors\Air Compressors”. The seller is “michigan_tool_deals” and is located in Troy, Michigan. This item can be shipped to United States.