Permitted overhung load FRa

The following important information refers to the overhung load value FRa in the relevant tables of this catalog:

FRa is calculated from the nominal bearing service life L10h (according to ISO 281) and the input speed ne according to the relevant tables of this catalog. For special operating conditions, the permitted overhung loads can be determined based on the modified bearing service life Lna. Contact SEW‑EURODRIVE in this case.

The permitted overhung load is influenced by the direction of rotation and the force application angle. The values FRa listed in the catalog are based on the least favorable application angle and the least favorable direction of rotation.

The permitted overhung loads FRa for the output shafts of foot-mounted gear units with a solid shaft are listed in the selection tables for gearmotors. For other designs, contact SEW-EURODRIVE.

The overhung load data refers to a force application at the center of the output shaft 0.5 × l. With right-angle gear units, the application point is assumed to be at the A‑side.

For gear units with hollow shaft and key (shaft-mounted design), the values refer to force application to the front end of the hollow shaft.

For the TorqLOC® hollow shaft mounting system design, no overhung load is permitted.

Reduced permitted overhung load

The following table shows the cases in which the overhung load must be limited:

Mounting surface

Gear unit

Mounting position

Limitations

K37 – K157

S37 – S97

S37p – S97p

M1

Maximally 50% of the overhung load FRa specified in the selection tables is permitted in the case of mounting at the front-end (shaded areas).

 

K167

K187

 

M1

M2

M3

M4

 

No reduction when the unit is mounted using the gray-shaded feet.

In case of deviating mounting, a maximum of 50% of the overhung load FRa specified in the selection tables is permitted.

K167

K187

M5

M6

No reduction when the unit is mounted using the gray-shaded feet.

In case of deviating mounting, contact SEW‑EURODRIVE.

R07F – R87F

M1 – M6

For all foot-mounted/flange-mounted gear units (R..F..) with torque transmission via the flange connection, a maximum of 50% of the overhung load FRa specified in the selection tables is permitted.