9 - AHP Merkle GmbH

2.7 Centering collar
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If the cylinder is mounted in the axial direction, the use of a centering collar may be expedient. This chamfer,
which is centric to the piston rod, aligns the hydraulic cylinder precisely. The advantage of this option: It is easy
to execute the design for an accurately-fi tting alignment of the hydraulic cylinder.
2.8 Keyway
!
With a block cylinder, a side keyway can optionally be created in the housing. This keyway serves to absorb
forces, and at the same time can be used for precise positioning. With higher forces the hydraulic cylinder
must provided with an additional rearwards support.
The bases of calculation for machine elements must also always be taken into account for
the mounting of hydraulic cylinders. The tightening torques must be adapted appropriately
depending on whether the screw connections are loaded axially or radially, for example.
Thus when calculating the mounting it is necessary to consider not only the static forces,
but also the possible high dynamic loads of hydraulic cylinders.