BKH
Metal Bellows Coupling with split hub

15 - 4,000 Nm

BKH METAL BELLOWS COUPLING WITH SPLIT HUB

Specifications BKH

BKH series 15 30 60 80 150 200 300 500 800 1500 4000
Rated torque (Nm)TKN15 30 60 80 150 200 300 500 800 1500 4000
Overall length (mm)A-2
5966
6977
8393
94106
95107
105117
111125
133146
140 166 225
Outer diameter (mm)B49 55 66 81 81 90 110 124 134 157 200
Fit length (mm)C22 27 31 36 36 41 43 51 45 55 85
Inner diameter possible from Ø to Ø H7 (mm)D1/28-28 10-30 12-35 14-42 19-42 22-45 24-60 35-60 40-75 50-80 50-90
Inner diameter possible from Ø to Ø H7 (inch)D1/20,375"-
1,000"
0,437"-
1,125"
0,500"-
1,375"
0,575"-
1,625"
0,750"-
1,625"
0,875"-
1,750"
1,000"-
2,250"
1,500"-
2,250"
1,625"-
2,875"
2,000"-
3,125"
Fastening screws ISO 4762EM5 M6 M8 M10 M10 M12 M12 M16 M16 M20 M24
Tighting torque of the fastening
screw (Nm)
E
8 15 40 50 70 120 130 200 250 470 1200
Distance between centers (mm)F17 19 23 27 27 31 39 41 48 55 65
Distance (mm)G6.5 7.5 9.5 11 11 12.5 13 16.5 18 22.5 28
Distance (mm)H
2936
3543
4151
4759
4860
5163
5569
6275
65.5 71 107
Mass moment of inertia (10-3 kgm2)Jges
0.070.08
0.140.15
0.230.26
0.650.67
2.53.2
4.55.4
8.510.5
17.319.6
24.3 49.2 165
Hub material (standard)
(steel on request)
 
Al Al Al Al Steel Steel Steel Steel Steel Steel Steel
Approx. weight (kg) 0.15 0.3 0.4 0.8 1.7 2.5 4 7.5 7 12 28
Torsional stiffness
(103 Nm/rad)
CT
2015
3928
7655
12985
175110
191140
450350
510500
780 1304 3400
Axial     (mm)max.
12
12
1.52
23
23
23
2.53.5
2.53.5
3.5 3.5 3.5
Lateral (mm)max.
0.150.2
0.20.25
0.20.25
0.20.25
0.20.25
0.250.3
0.250.3
0.30.35
0.35 0.35 0.4
Axial spring stiffness (N/mm)Ca
2515
5030
7248
4832
8252
9060
10571
7048
100 320 565
Lateral spring stiffness (N/mm)Cr
475137
900270
1200420
920290
1550435
2040610
37501050
2500840
2000 3600 6070
Angular ± (degree)
11.5
11.5
11.5
11.5
11.5
11.5
11.5
11.5
1.5 1.5 1.5
CAD Portal 15 30 60 80 150 200 300 500 800 1500 4000
2D/3D Data 

Properties

  • Design:
    • Both clamping hubs are completely separable, due to split hubs and two radial screws ISO 4762 on each hub.
    • Any imbalance of the clamping hubs is compensated for by 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.
  • Service life: These couplings 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
stainless steel.
    • Hub material see table
  • Brief overloads: Acceptable up to 1.5 times the value specified.
  • Speeds: Up to 10,000 rpm, in excess of 10,000 available with a finely balanced version.
  • Non-standard application: Custom designs with varied tolerances, keyways, non-standard material, bellows and ATEX designs are available upon request.
  • Properties of Bellows Coupling model BKH:
    • easy to mount
    • suited for space restricted installations
    • low moment of inertia
    • fine balanced up to 40,000 RPM

Overview