nord 6052902/0213, Manual With Installation Instructions, Page: 36 / 128

Industrial gear units – Manual with installation instructions
36 B 1050 en-3921
Prerequisites
• The hollow shaft must be completely free of grease.
• The standard solid shaft of the machine must be completely free of grease.
• Unless otherwise stated in the specific dimension sheet for the order, the external diameter of the
solid shaft must be within the tolerance 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 286-2.
Fitting procedure for 2-part shrink disc
1. Remove the cover, if any.
2. Loosen the tensioning bolts of the shrink disc, but do not unscrew them completely. Tighten the
tensioning bolts gently by hand until there is no play between the flanges and the inner ring.
3. Push the shrink disc up to the specified position on the hollow shaft. For the position, refer to the
order-related dimension sheet.
4. For a special hollow shaft with bronze bushing, grease the solid shaft of the machine in the area
which will later come into contact with the bushing in the hollow shaft (Figure 14). Do not grease
the bronze bushing. It is essential that the tensioning seat of the hollow shaft is free of grease.
Legend
Free of grease in this area
1: Bronze bushing
2: Shrink connection area
3: Solid shaft of machine
Figure 14: Machine shaft assembly for special hollow shafts with shrink discs
For a standard hollow shaft, do not apply grease to the solid shaft of the machine.
5. Insert the solid shaft of the machine into the hollow shaft so that the area around the shrink
connection is completely filled.
6. Tighten the tensioning bolts of the shrink disc in sequence with approx. ¼ rotation of the bolt per
turn in clockwise direction by several turns. Use a torque wrench to tighten tensioning bolts to the
tightening torque specified on the shrink disc.