BK6
Metal Bellows Coupling with conical sleeve and tapered press-fit connection

15 - 1,500 Nm

BK6 METAL BELLOWS COUPLING WITH CONICAL SLEEVE AND TAPERED PRESS-FIT CONNECTION

Specifications BK6

BK6 series 15 30 60 150 300 500 800 1500
Rated torque (Nm) TKN 15 30 60 150 300 500 800 1500
Overall length (mm) A+0,5
5865
6876
7989
97109
113127
132145
140 158
Outer diameter (mm) B 49 55 66 81 110 124 133 157
Fit length (mm) C1 13.5 21.5 18 23.5 27 32 42 53
Fit length (mm) C2 29 34 39 49.5 59 68 74 90.5
Inner diameter possible from Ø to Ø H7 (mm) D1 10-22 12-24 12-32 15-40 24-56 30-60 40-62 50-75
Inner diameter possible from Ø to Ø H7 (mm) D210-22 12-24 12-32 15-40 24-56 30-60 40-62 50-75
6 x ISO 4762 screwEM4
M5
M5
M6 M8
M8
M10
M12
Tighting torque (Nm)E3.5
6.5
8
12
30
32
55
110
Ø Diameter of clamping cone (mm)F46.5 51 60 74 102 114 126 146
Distance (mm)G9.5 10.5 11.5 17.5 20 23 27 32
Axial Pretensioning approx. (mm)H0.2-1.0 0.5-1.0 0.5-1.5 0.5-1.5 0.5-1.5 1.0-2.0 1.0-2.0 0.5-1.5
Axial recovery of coupling max. (N)
2012
5030
7045
8252
157106
14096
400 650
Moment of inertia (10-3 kgm2) Jges
0.10.12
0.20.25
0.40.45
2.02.5
5.46.1
8.49.1
19.5 44
Approx. weight (kg)
0.30.32
0.50.52
0.820.84
1.61.7
4.14.2
6.06.3
9.4 16.2
Torsional stiffness (103 Nm/rad) CT
108
2014
3828
8855
225175
255245
400 650
Axial*    (mm)max.
0.51
0.51
0.51
12
1.52
2.53.5
3 2
Lateral (mm)max.
0.150.2
0.20.25
0.20.25
0.20.25
0.250.3
0.30.35
0.35 0.35
Angular ± (grad)
11.5
11.5
11.5
11.5
11.5
11.5
1.5 1.5
Lateral spring stiffness (N/mm)Cr
475137
900270
1200420
1550435
37501050
2500840
2000 3600
CAD Portal 15 30 60 150 300 500 800 1500
2D/3D Data 

Properties

  • Design:
    • One side concial sleeve with 6 fastening screws
ISO 4762 and 3 draw-off threads.
    •  One side with
backlash-free tapered concial sleeve with press
fit connection and 3 draw-off screws
  • Temperature range: -30° C to +100° C (-22° F to +212° F)
  • Backlash: Absolutely backlash-free.
  • Service life: The BK6 bellows couplings are maintenance-free and have an infinite life, if the tolerances 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
    • conical sleeves and tapered segment on bellows face are made of steel.
    • Tapered segment on hub face: glass-fiber
rein forced plastic molded onto a steel hub.
  • Brief overload: Acceptable up to 1.5 times the value specified.
  • Speeds: Up to 10,000 rpm, in excess of 10,000 rpm available with a finaly balanced version.
  • Non-standard application: Custom designs with varied tolerances, keyways, non-standard
material and bellows are available upon request.
  • Properties of Bellows Coupling model BK6:
    • for axial mounting
    • absolutely backlash-free
    • easy mounting and dismounting
    • electrically and thermally insulated
    • high degree of operating dependability
    • torsionally rigid
    • wear-free press-fit connection