Bellows coupling                                        BKXK 4048: 40mm diameter & 48mm length

The BKXK 4048 bellows coupling is the largest coupling in our bellows coupling portfolio. With stainless steel bellows and aluminium clamping hub, also for mounting on unmachined shafts. In addition to other high performance values, the speed of up to 10 Nm represents the peak value in the BKXK series.

With a diameter of 40 mm, the overall length is 48 mm. Please also note the many smaller versions. You can find examples of applications on the "Bellows couplings" page.

Technical data- bellows coupling BKXK

Technical data


BKXK 4048

max. speed min-¹ 5.000
max. torque Nm 10
max. offset of shafts    
          radial mm ± 0,30
          axial mm ± 0,50
          angular Grad ± 1,5
torsion spring stiffness Nm/rad 350
radial spring stiffness N/mm 150
moment of inertia gcm2 92/ depending on Ø bore
max. clamping torque Nm 8
temperature range °C -40/ +140
weight app. g 83
material flange aluminium  
material bellows stainless steel  

Bore combinations BKXK 4048

d1/d2 10 12 14 16 18 20 22
10 x x x x x x x
12   x x x x x x
14     x x x x x
16       x x x x
18         x x x
20           x x
22             x

To download the step file, please select the required bore combination.

Technical drawings