BK1
Metal Bellows Couplings with flange mounting for special design application

15 - 10,000 Nm

BK1 METAL BELLOWS COUPLINGS WITH FLANGE MOUNTING FOR SPECIAL DESIGN APPLICATION

Specifications BK1

BK1 series 15 30 60 150 200 300 500 800 1500 4000 6000 10000
Rated torque (Nm) TKN 15 30 60 150 200 300 500 800 1500 4000 6000 10000
Overall length (mm) A-2
3037
3644
4353
5062
5365
5670
6477
81 100 145 138 150
Outer diameter of bellow (mm) B 49 55 66 81 90 110 124 133 157 200 253 303
Fit length
thread depth (mm)
C
7.5 10 11 13 14.5 15 16 18 22 30 30 36
Inner diameter Ø H7 (mm) D 25 28 38 50 58 65 70 75 85 100 145 190
Inner diameter Ø H7 (inch)0,948" 1,102" 1,496" 1,968" 2,283" 2,559" 2,755" 2,952" 3,346" 3,937" 5,708" 7,480"
6x fastening threads E M5 M5 M6 M6 M6 M8 M8 M10 M16 M20 8xM20 8xM24
Hub bolt circle ± 0.2 (mm) F 35 37 46 62 70 80 94 90 110 140 190 234
Outer diameter f7 (mm) G 49 55 66 81 90 110 122 116 140 182 235 295
Mass moment of inertia (10-3 kgm2) Jges
0.070.08
0.140.15
0.300.32
0.900.95
1.301.40
1.952.10
3.03.4
4.3 10.6 46 132 350
Approx. weight (kg)0.15 0.2 0.3 0.6 0.8 1.35 1.8 1.9 3.3 8.9 13.9 23.7
Torsional stiffness
(103 Nm/rad)
CT
2015
3928
7655
175110
191140
450350
510500
780 1304 3400 5700 10950
Axial (mm) max.
12
12
1.52
23
23
2.53.5
2.53.5
3.5 3.5 3.5 3 3
Lateral (mm) max.
0.150.2
0.20.25
0.20.25
0.20.25
0.250.3
0.250.3
0.30.35
0.35 0.35 0.4 0.4 0.4
Angular (degrees) max.
11.5
11.5
11.5
11.5
11.5
11.5
11.5
1.5 1.5 1.5 1.5 1.5
Axial spring stiffness (N/mm) Ca
2515
5030
7248
8252
9060
10571
7048
100 320 565 1030 985
Lateral spring stiffness (N/mm) Cr
475137
900270
1200420
1550435
2040610
37501050
2500840
2000 3600 6070 19200 21800
CAD Portal 15 30 60 150 200 300 500 800 1500 4000 6000 10000
2D/3D Data 

Properties

  • Design:
    • The hubs have six threaded metric mounting holes
    • The ID and OD are concentrically machined to ISO H7 tolerances
    • Hubs with custom bore size, mounting threads and bolt circles are available upon request
  • Temperature range: -30° C to +120° C (-22° F to +212° F)
  • Blacklash: Absolutely backlash-free due to bolted connection.
  • Service life: These couplings are maintenance-free if the technical limits are not exceeded.
  • Material:
    • Bellows made of highly flexible high grade stainless steel
    • hub material: steel
  • Brief overloads: Acceptable up to 1.5 times the value specified.
  • Speeds: Up to 10,000 rpm in excess of 10,000 with finely balanced version
  • Non-standard application: Custom designs with varied tolerances, keyways, non-standart material, bellows and ATEX designs are available upon request.
  • Properties of Bellows Coupling BK1:
    • special design application

Overview