Industrial gear units – Operating and Assembly Instructions
36 B 1050 en-1819
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3.10.2 Hollow shaft with shrink disc element (Option: S)
CAUTION
Risk of injury
Risk of injury from incorrect mounting and dismantling of the shrink disc.
NOTICE! Gear unit damage
The separate manufacturer’s documentation for the shrink disc must be observed for installation
NOTICE! Gear unit damage
Bearings, gear wheels, shafts and housings may be damaged by incorrect assembly.
• The hollow shaft of the gear unit unit must be fitted onto the solid shaft of the machine using a suitable puller
which will not exert damaging axial forces on the gear unit. In particular, do not hit the gear unit with a
hammer.
• If the tensioning bolts of the shrink disc are tightened without the solid shaft inserted, the hollow shaft may be
permanently deformed. Do not tighten the bolts if the solid shaft is not inserted!
• When re-assembling the shrink disc, the tensioning bolts must be cleaned and the thread and head surfaces
treated with grease which does not contain Molycote.
NOTICE! Gear unit damage
Hollow shafts with shrink discs must not be mounted on solid machine shafts with shoulders in order to avoid
tension or rubbing between the hollow shaft and the shoulder.
Unless otherwise stated in the specific dimension sheet for the order, the external diameter of the
customer's shaft must have a fit of h6 if the diameter is up to and including 160 mm or g6 for larger
diameters. The fit must be according to DIN EN ISO 286.
The material of the customer's shaft must have a minimum yield strength of 360 N/mm
2
. This ensures
that no permanent deformation occurs due to the clamping force.
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