3. Storage, Preparation,
Installation
www.nord.com B1000 -15-
3.7 Fitting shrink discs
Figure 3-10: Hollow shaft with shrink disc
Attention!
Do not tighten bolts if the solid shaft is not inserted!
Assembly sequence:
1. Remove any transport securing devices.
2. Loosen but do not remove tightening bolt and tighten gently by hand until there is no play
between the flanges and the inner ring.
3. Slide the shrink disc onto the hollow shaft until the outer clamping flange is flush with the
hollow shaft. The shrink disc is easier to slide on if the bore of the inner ring is lightly
greased.
4. Prior to mounting, grease the solid shaft only in the area which will later come into contact
with the bronze bush in the hollow shaft of the gear unit. Do not grease the bronze bush, in
order to prevent grease penetrating the area around the shrink connection.
5. The hollow shaft of the gear unit must be completely de-greased and completely
free of grease.
6. In the area of the shrink connection the solid shaft of the machine must be degreased and
completely free of grease.
7. Insert the solid shaft of the machine into the hollow shaft so as to completely fill the area
around the shrink connection.
8. Position the clamping flange by gently tightening the bolts.
9. Tighten the bolts successively in a clockwise direction by several turns – not crosswise –
with approx. ¼ rotation per turn. Tighten the bolts with a torque wrench to the torque
indicated on the shrink disc.
Shrink disc type, Mat. No.
and torque details for tensioning screws
Tensioning flanges
Solid shaft of machine
Shaft and and hollow shaft bore
Tensioning screws DIN 931 (933) -10.9
GREASE FREE!
The shrink discs are suplied by the
manufacturer ready for fitting. They must not
be dismantled prior to fitting.
Hollow shaft of gear unit
Double half-slotted inner ring
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