BK5
Metal Bellows Coupling with tapered press-fit connection

15 - 1,500 Nm

BK5 METAL BELLOWS COUPLING WITH TAPERED PRESS-FIT CONNECTION

Specifications BK5

BK5 series 15 30 60 80 150 300 500 800 1500
Rated torque (Nm) TKN 15 30 60 80 150 300 500 800 1500
Overall length (mm) A+0,5
6067
7179
8595
94106
95107
114128
136149
150 172
Outer diameter (mm) B 49 55 66 81 81 110 124 133 157
Fit length (mm) C1 22 27 31 36 36 43 51 45 55
Fit length (mm) C2 28 33 39 43 43 52 61 74 94
Inner diameter possible from Ø to Ø H7 (mm) D1 8-28 10-30 12-35 14-42 14-42 24-60 35-60 40-75 50-80
Inner diameter possible from Ø to Ø H7 (mm) D2 8-22 10-25 12-32 14-38 14-38 24-58 35-60 40-62 50-75
ISO 4762 screwEM5
M6 M8
M10
M10
M12
M16
2x M16* 2x M20*
Tighting torque (Nm)E8
15
40 50
70
130
200
250
470
Distance between centers (mm)F17 19 23 27 27 39 41 2x 48* 2x 55*
Distance (mm)G6.5 7.5 9.5 11 11 13 16.5 18 22.5
Axial Pretensioning approx. (mm)H0.2-1.0 0.5-1.0 0.5-1.5 0.5-1.5 0.5-1.5 0.5-1.5 1.0-2.0 1.0-2.5 0.50-1.50
Axial recovery of coupling max. (N)
2012
5030
7045
4832
8252
157106
14096
200 650
Mass moment of inertia (10-3 kgm2) Jges
0.070.08
0.140.15
0.230.26
0.650.67
2.22.4
7.47.9
13.714.4
26.2 51.4
approx. weight (kg)0.1 0.3 0.4 0.9 1.8 4
6.56.7
8.2 15.3
Torsional stiffness (103 Nm/rad) JT
108
2014
3828
6543
8855
225175
255245
400 650
Axial*    (mm)max.
0.51
0.51
0.51
12
12
1.52
2.53.5
3 2
Lateral (mm)max.
0.150.2
0.20.25
0.20.25
0.20.25
0.20.25
0.250.3
0.30.35
0.35 0.35
Angular ±(grad)Cr
11.5
11.5
11.5
11.5
11.5
11.5
11.5
1.5 1.5
Lateral spring stiffness (N/mm)
475137
900270
1200420
920290
1550435
37501050
2500840
2000 3600
CAD Portal 15 30 60 80 150 300 500 800 1500
2D/3D Data 

Properties

  • Design:
    • One side with a single radial clamping screw ISO 4762.
    • One side includes backlash-free clamping hub and tapered press-fit
device.
    • Any imbalance of the clamping hub, is compensated with balancing bores located on the inside of the hub.
  • Temperature range: -30° C to +100° C (-22° F to +212° F)
  • Backlash: Absolutely backlash-free due to frictional clamp
connection and axial pretensioning of the tapered
press-fit segments.
  • Service life: These couplings have an infinite life and are maintenance- free if the technical ratings are not exceeded.
  • Tolerance: On the hub/shaft connection 0.01 to 0.05 mm.
  • Material:
    • Bellows made of highly flexible, high-grade stain-
less steel
    • clamping hubs up to series 80 aluminium,
and 150 and up steel
    • Tapered segment on hub face:
glass-fiber reinforced plastic molded onto an
aluminium hub.
  • Speeds: Up to 10,000 rpm, over 10,000 rpm available with a finely balanced version.
  • Brief overloads: Acceptable up to 1.5 times the value specified.
  • Properties of Bellows Coupling model BK5:
    • absolutely backlash-free and torsionally rigid
    • easy mounting and dismounting
    • wear-free and maintenance-free
    • electrically and thermally insulated
    • low moment of inertia
    • compensation for misalignment