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Axial Load

Compressive Axial Load

Permissible Compressive Axial Load Fperm

Permissible Compressive Axial Load

Permissible Axial Load Calculation Parameters

*) Directionally stable mounting

Bearing Arrangement Types

The permissible axial load can be determined from the chart based on screw bearing arrangement, nominal diameter d0 × lead P, and screw length Ln.

For compressive axial load Fk, the chart includes a threefold safety factor (ν = 3).

Fperm. = Fkν ≦ C0am

The static load rating C0am is the load limit that causes plastic deformation of 10-4 × ball diameter under static conditions.

See data sheets for C0am

Permissible Compressive Axial Load vs Screw Length Chart

Steps for Increasing the Permissible Compressive Axial Load

Steps for Increasing the Permissible Compressive Axial Load

D

Use Bearing Arrangement D

Double-end fixed arrangement provides the highest axial load capacity

T

Apply Tensile Load

Apply tensile load to the screw in arrangement A or C cases

+

Increase Nominal Diameter

Larger diameter can withstand higher compressive loads

H

Reduce Compressive Load

Share load through hydraulic or counterweight methods

Bearing Arrangement Reference Table

Bearing Arrangement Reference

ArrangementDescriptionEnglishkLDirectionally stable
AFixed–FreeFixed–FreekL = 1.68Yes
BSupported–SupportedSupported–SupportedkL = 4.68No
CFixed–SupportedFixed–SupportedkL = 7.31Yes
DFixed–FixedFixed–FixedkL = 10.60Yes
ESC