HHD Series Heavy Duty Hydraulic Cylinders

38 SPECIALS/Engineering Data Specifications and prices are subject to change without notice or incurring obligations. FABCO-AIR, Inc., 3716 N.E. 49th Avenue, Gainesville, FL 32609 • www.fabco-air.com TYPES OF CYLINDERS DOUBLE ACTING CYLINDERS This is the most common type of cylinder. This type of cylinder is for use in applications where force is needed in both directions. SINGLE ACTING CYLINDERS This type of cylinder is used when force is needed in only one direction, either extend or retract. Commonly the opposite end of the cylinder is vented to atmosphere, or in a hydraulic application the opposite port can be vented back to the tank. Depending on the application either gravity or the weight of the load will retract the cylinder. DOUBLE ROD CYLINDERS These cylinders can have load attached to both ends of the cylinder and work in both directions. Other applications for double rod cylinders include equal displacement on both sides of the cylinder, or operating switches of cams. MOUNTING CONSIDERATIONS: FABCO-AIR's fluid power cylinders can be found in many mounting configurations. The decision on the proper mount should take into consideration what style is best suited for the application at hand. We can break these mounts into 3 groups: CENTERLINE FORCE TRANSFER (Mounts include F1, F2, E5, E6, F5, F6, E3, E4, X0, X1, X3, X2) These are cylinders with fixed mounts that absorb forces along their center-line in both thrust and tension applications. Mounting bolts are not subjected to compound forces and, if properly installed, sideload damage is removed, extending rod gland life. OFF-CENTERLINE FORCE TRANSFER (Mounts include S2, S4, S7) These are cylinders with fixed mounts that do not absorb forces along their centerline. These mounts tend to produce a twisting in the cylinder as it applies force to a load. To avoid problems, these cylinders must be securely mounted with loads well guided when possible. Depending on application, pinning the mounting lugs or adding an extended key plate may reduce side load to rod gland and piston bearings. Consult factory with questions or concerns with your application. PIVOT FORCE CYLINDERS (Mounts include P1, P3, PU3, T8, T6, T7) These cylinders absorb forces along their centerline and are used when the load must travel in a curved path. The type of mount will depend on the load staying in one curved path or the need to pivot on two axis. Choose the mount based on your application and consult the piston rod selection chart on page 4. For long stroke applications, a larger rod diameter or stop tube may be required. 12-7-16