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For drive by means of parallel keys the following fit pairs are prescribed for the bores:
Table 2:
Fit pairs
Selection of fit
Shaft tolerance
to FLENDER standard
Shaft tolerance
to DIN 748/1
System standard shaft
The assigned fits must be adhered to in order, on the one hand, to keep the play in the
shafthub connection as low as possible, depending on utilisation of the tolerance
zones, or, on the other, to keep the hub tension arising from the oversize within the
permissible load limit. Failure to adhere to the fits may impair the shafthub
connection.
If the tolerance values of the shafts deviate from those in table 2, Flender must be
consulted.
Failure to observe these instructions may result in breakage of the coupling.
Danger from flying fragments.
The coupling then becomes an explosion hazard.
6.1.2
Parallel keyway
The parallel keyways must be designed in accordance with DIN 6885/1. If the keyway geometry deviates,
Flender must be consulted. Taper keys or nose keys (gib headed keys) are not permissible.
The parallel keyways must be designed to suit the available parallel keys. For parallel keyways the
tolerance zone of the hub keyway width ISO JS 9 must be adhered to.
The parallel keyway must be machined as shown in the illustration.
Part 1
Fig. 5:
Parallel keyway
6.1.3
Axial fastening
The hollow shaft (106) of the FLUDEX coupling is secured axially with a locking plate (140) and retaining
screw (141) (included in delivery) (for tightening torques, see table 3).
Table 3:
Tightening torques of the retaining screws
Retaining-screw thread
Tightening torque [Nm]
A set screw or end plate must be provided to secure the NEUPEX addon coupling axially. If end plates
are used, Flender must be consulted with regard to machining the recesses in the coupling parts.
FLUDEX 4600 en
Operating instructions 10/2017
Bore D
1
over
up to
mm
mm
25
25
100
100
50
50
50
50
all
Part 2
Part 4
M6
M8
M10
10
25
49
Shaft tolerances
k6
m6
n6
k6
m6
h6
h8
Part 5
Part 9
M12
M16
M20
86
160
300
Bore tolerances
H7
H7
K7
M7
N7
Part 13
Part 32
M24
M30
500
800
15
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