FLENDER ARPEX ARS-6 - Demounting the Shaft­hub Connection with Parallel Key

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ARPEX 8704 en
Operating instructions 01/2019
In case of hubs with a parallelkey connection fitting may be aided by slightly heating the coupling hubs
(maximum 150 °C).
Take precautions to avoid burns from hot parts.
Wear suitable protective gloves.
Hubs with transition fits and heated hubs can be pulled onto the slightly oiled shaft end with the aid of
a fitting device.
Screw threaded rod (the size of the thread depends on the shaft diameter) into the shaft end. Fit an
appropriately sized washer over the threaded rod. By screwing on and tightening a nut the hub is pushed
onto the shaft (see figure 8).
1
2
3
Fig. 8: Fitting the hub with threaded rod
1 Threaded rod
2 Washer
3 Nut
6.4 Demounting the shafthub connection with parallel key
If a coupling hub with parallelkey connection is to be pulled off the shaft, the plate packs must first be
demounted. Then, if necessary, the end plate can be demounted or the set screw loosened. With the aid
of a detaching device (threearmed pullingoff device) or by inserting a pullingoff device into the pullingoff
holes provided – if these are required in the order – pull the hub off the shaft end (see fig. 9 and 10).
In case of an interference fit the hub must, if necessary, be evenly slightly heated with a burner and carefully
pulled off the shaft, using a detaching device.
Take precautions to avoid burns from hot parts.
Wear suitable protective gloves.
Check the demounted parts to see if they can be reused and, if necessary, return them to Flender for
repair.