OTC 4139 30-Ton Spring-Return Hollow Center Hydraulic Ram.
Ideal for push/pull applications found in off=highway, construction, mining, and other industries where heavy equipment is maintained.
Center hole permits extending screws, cables, etc., straight through the ram for versatility of application. Rams withstand full "dead-end" loads.
Chrome-plated piston rods resist wear, and superior packings and seals provide high cycle life without leakage. Piston head inserts are interchangeable for versatility, and tapped base mounting holes provide easy installation in fixed applications.
Cylinder Capacity Tons: 30;
Oil Capacity (cu. in.): 15.85;
Tons at 10,000 PSI: 31.7;
Spring Return: yes;
Height Collapsed: 6-1/4";
Height Extended: 8-3/4";
Center Hole dia: 1-19/64";
Insert Thread size: 2-3/4"-12;
Outside Diameter: 4-3/4";
Piston Rod Diameter: 3-1/4";
Thread Length: 1-1/2";
Collar Thread (Straight): 4-3/4"-12;
Cyl effective area (sq in): 6.34.