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Straight line, force not absorbed-Side-mounted cylinders do not absorb force along their centerlines. When used at higher pressures or under shock conditions, the lugs should be dowel pinned to the machine. Centerline lug mounts absorb forces on the centerline and are the least popular fixed mounting style. As with other NFPA standardized mountings, centerline lug mounts provide straight-line transfer of force.Ĭap mounting is recommended for thrust loads, whereas head mounting should be used where major loading loads the piston rod in tension. Selection of a flange mount depends partly on whether the major forces applied to the load result in compression or tension on the piston rod.Ģ. Three standard styles are head (rod)-end rectangular flange, head (rod)-end square flange, and a larger and thicker rectangular head with its own mounting holes the same three versions are available for the cap end of the cylinder. When the tie rods extend at both ends of the cylinder, one end can be used for cylinder mounting and the opposite end can support the cylinder or be attached to the machine members.įlange mounts also are extremely good for straight line force transfer applications. Fixed cylinder mounts that provide straight-line force transfer are: extended tie rod s(a or b) and tie rods extended at both ends (a and b) rectangular head flange (c) square head flange (d) and rectangular head (e), which provides same service as (c) but the entire head is rectangular, rather than an added flange.Ĭylinder tie rods are designed to withstand maximum rated internal pressure, and can be extended at either end and used to mount the cylinder. Mounting bolts are subjected to simple tension or shear without compound forces when properly installed, cylinder bearing side loading is minimized.ġ. Tie rods extended, flange, or centerline lug mounts are symmetrical and allow the thrust or tension forces of the piston rod to be distributed uniformly about the cylinder centerline. Straight line-Cylinders with fixed mounts that absorb the force on the centerline of the cylinder are considered the best for straight line force transfer. Pivot force transfer with pivot mounts that absorb force on the centerline of the cylinder and allow the cylinder to change alignment in one plane.Straight-line force transfer with fixed mounts that do not absorb force on the centerline of the cylinder and.Straight-line force transfer with fixed mounts that absorb force on the centerline of the cylinder.

Part of this standardization program includes cylinder mounting styles, which generally provide: The National Fluid Power Association (NFPA) has standardized on several dimensions for square-headed tie rod cylinders to promote cylinder interchangeability between manufacturers.