FLENDER FLUDEX - Mill the Finished Bore; Table 5-1 Recommended Assigned Fits for Bores with Parallel Key Connection

Assembly
5.1 Preparatory work
28 Edition 09/2022 M4602-02en
N-EUPEX add-on coupling
Please consult Flender if you want to machine a tapered finished bore.
Carry out the following steps if the coupling does not have a finished bore:
• Mill the finished bore (Page28)
• Mill the parallel keyway (Page31)
• Machining an axial locking mechanism (Page31)
• Balancing the coupling (Page33)
Information
The customer is responsible for execution of the finishing work on the coupling. Flender
shall have no liability whatsoever for claims under warranty arising from finishing work that
has not been carried out adequately.
5.1.1 Mill the finished bore5.1 Preparatory work
The diameter of the finished bore depends on the shaft used.
Recommended assigned fits
In the following table you can find the recommended assigned fits for bores with a parallel
key connection. The assigned fit m6 / H7 is especially suitable for a host of applications.
Assigned fit Bore D Shaft tolerances Bore tolerances
over
mm
up to
mm
Shaft tolerance ac-
cording to FLENDER
standard
25 k6 H7
25 100 m6
100 n6
Shaft tolerance ac-
cording to DIN 748/1
50 k6 H7
50 m6
“Standard shaft” sys-
tem
50 h6 K7
50 M7
All h8 N7
Table5-1: Recommended assigned fits for bores with parallel key connection