BKH
Metal Bellows Coupling with split hub

15 - 4,000 Nm

BKH METAL BELLOWS COUPLING WITH SPLIT HUB

BKH

Specifications BKH

BKH Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Axial ± (mm)max.
Lateral ± (mm)max.
Angular ± (degree)max.
Axial spring stiffness (N/mm)Ca
Lateral spring stiffness (N/mm)Cr
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Hub material
Distance (mm)H-2
CAD Portal
BKH Serien15
Rated torque (Nm)TKN15
Overall length (mm)A-259 | 66
Fit length (mm)C22
Inside diameter possible from Ø to Ø H7 (mm)
D1/D28-28
Outside diameter (mm)B49
Moment of inertia (10-3 kgm2)Jges.0,07 | 0,08
Approximate weight (kg)0,15
Torsional stiffness (10³ Nm/rad)CT20 | 15
Axial ± (mm)max.1 | 2
Lateral ± (mm)max.0,15 | 0,2
Angular ± (degree)max.1|1,5
Axial spring stiffness (N/mm)Ca25 | 15
Lateral spring stiffness (N/mm)Cr475 | 137
Fastening screw ISO 4762EM5
Tightening torque of the fastening screw (Nm)E8
Distance between centerlines (mm)F17
Distance (mm)G6,5
Hub materialAluminium
optional Steel
Distance (mm)H-229 | 36
15
CAD
BKH Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Axial ± (mm)max.
Lateral ± (mm)max.
Angular ± (degree)max.
Axial spring stiffness (N/mm)Ca
Lateral spring stiffness (N/mm)Cr
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Hub material
Distance (mm)H-2
CAD Portal
BKH Serien30
Rated torque (Nm)TKN30
Overall length (mm)A-269 | 77
Fit length (mm)C27
Inside diameter possible from Ø to Ø H7 (mm)
D1/D210-30
Outside diameter (mm)B55
Moment of inertia (10-3 kgm2)Jges.0,14 | 0,15
Approximate weight (kg)0,3
Torsional stiffness (10³ Nm/rad)CT39 | 28
Axial ± (mm)max.1 | 2
Lateral ± (mm)max.0,2 | 0,25
Angular ± (degree)max.1|1,5
Axial spring stiffness (N/mm)Ca50 | 30
Lateral spring stiffness (N/mm)Cr900 | 270
Fastening screw ISO 4762EM6
Tightening torque of the fastening screw (Nm)E15
Distance between centerlines (mm)F19
Distance (mm)G7,5
Hub materialAluminium
optional Steel
Distance (mm)H-235 | 43
30
CAD
BKH Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Axial ± (mm)max.
Lateral ± (mm)max.
Angular ± (degree)max.
Axial spring stiffness (N/mm)Ca
Lateral spring stiffness (N/mm)Cr
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Hub material
Distance (mm)H-2
CAD Portal
BKH Serien60
Rated torque (Nm)TKN60
Overall length (mm)A-283 | 93
Fit length (mm)C31
Inside diameter possible from Ø to Ø H7 (mm)
D1/D212-35
Outside diameter (mm)B66
Moment of inertia (10-3 kgm2)Jges.0,23 | 0,26
Approximate weight (kg)0,4
Torsional stiffness (10³ Nm/rad)CT76 | 55
Axial ± (mm)max.1,5 | 2
Lateral ± (mm)max.0,2 | 0,25
Angular ± (degree)max.1|1,5
Axial spring stiffness (N/mm)Ca72 | 48
Lateral spring stiffness (N/mm)Cr1200 | 420
Fastening screw ISO 4762EM8
Tightening torque of the fastening screw (Nm)E40
Distance between centerlines (mm)F23
Distance (mm)G9,5
Hub materialAluminium
optional Steel
Distance (mm)H-241 | 51
60
CAD
BKH Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Axial ± (mm)max.
Lateral ± (mm)max.
Angular ± (degree)max.
Axial spring stiffness (N/mm)Ca
Lateral spring stiffness (N/mm)Cr
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Hub material
Distance (mm)H-2
CAD Portal
BKH Serien80
Rated torque (Nm)TKN80
Overall length (mm)A-294 | 106
Fit length (mm)C36
Inside diameter possible from Ø to Ø H7 (mm)
D1/D214-42
Outside diameter (mm)B81
Moment of inertia (10-3 kgm2)Jges.0,65 | 0,67
Approximate weight (kg)0,8
Torsional stiffness (10³ Nm/rad)CT129 | 85
Axial ± (mm)max.2 | 3
Lateral ± (mm)max.0,2 | 0,25
Angular ± (degree)max.1|1,5
Axial spring stiffness (N/mm)Ca48 | 32
Lateral spring stiffness (N/mm)Cr920 | 290
Fastening screw ISO 4762EM10
Tightening torque of the fastening screw (Nm)E50
Distance between centerlines (mm)F27
Distance (mm)G11
Hub materialAluminium
optional Steel
Distance (mm)H-247 | 59
80
CAD
BKH Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Axial ± (mm)max.
Lateral ± (mm)max.
Angular ± (degree)max.
Axial spring stiffness (N/mm)Ca
Lateral spring stiffness (N/mm)Cr
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Hub material
Distance (mm)H-2
CAD Portal
BKH Serien150
Rated torque (Nm)TKN150
Overall length (mm)A-295 | 107
Fit length (mm)C36
Inside diameter possible from Ø to Ø H7 (mm)
D1/D219-42
Outside diameter (mm)B81
Moment of inertia (10-3 kgm2)Jges.2,5 | 3,2
Approximate weight (kg)1,7
Torsional stiffness (10³ Nm/rad)CT175 | 110
Axial ± (mm)max.2 | 3
Lateral ± (mm)max.0,2 | 0,25
Angular ± (degree)max.1|1,5
Axial spring stiffness (N/mm)Ca82 | 52
Lateral spring stiffness (N/mm)Cr1550 | 435
Fastening screw ISO 4762EM10
Tightening torque of the fastening screw (Nm)E70
Distance between centerlines (mm)F27
Distance (mm)G11
Hub materialSteel
optional Aluminium
Distance (mm)H-248 | 60
150
CAD
BKH Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Axial ± (mm)max.
Lateral ± (mm)max.
Angular ± (degree)max.
Axial spring stiffness (N/mm)Ca
Lateral spring stiffness (N/mm)Cr
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Hub material
Distance (mm)H-2
CAD Portal
BKH Serien200
Rated torque (Nm)TKN200
Overall length (mm)A-2105 | 117
Fit length (mm)C41
Inside diameter possible from Ø to Ø H7 (mm)
D1/D222-45
Outside diameter (mm)B90
Moment of inertia (10-3 kgm2)Jges.4,5 | 5,4
Approximate weight (kg)2,5
Torsional stiffness (10³ Nm/rad)CT191 | 140
Axial ± (mm)max.2 | 3
Lateral ± (mm)max.0,25 | 0,3
Angular ± (degree)max.1|1,5
Axial spring stiffness (N/mm)Ca90 | 60
Lateral spring stiffness (N/mm)Cr2040 | 610
Fastening screw ISO 4762EM12
Tightening torque of the fastening screw (Nm)E120
Distance between centerlines (mm)F31
Distance (mm)G12,5
Hub materialSteel
optional Aluminium
Distance (mm)H-251 | 63
200
CAD
BKH Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Axial ± (mm)max.
Lateral ± (mm)max.
Angular ± (degree)max.
Axial spring stiffness (N/mm)Ca
Lateral spring stiffness (N/mm)Cr
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Hub material
Distance (mm)H-2
CAD Portal
BKH Serien300
Rated torque (Nm)TKN300
Overall length (mm)A-2111 | 125
Fit length (mm)C43
Inside diameter possible from Ø to Ø H7 (mm)
D1/D224-60
Outside diameter (mm)B110
Moment of inertia (10-3 kgm2)Jges.8,5 | 10,5
Approximate weight (kg)4
Torsional stiffness (10³ Nm/rad)CT450 | 350
Axial ± (mm)max.2,5 | 3,5
Lateral ± (mm)max.0,25 | 0,3
Angular ± (degree)max.1|1,5
Axial spring stiffness (N/mm)Ca105 | 71
Lateral spring stiffness (N/mm)Cr3750 | 1050
Fastening screw ISO 4762EM12
Tightening torque of the fastening screw (Nm)E130
Distance between centerlines (mm)F39
Distance (mm)G13
Hub materialSteel
optional Aluminium
Distance (mm)H-255 | 69
300
CAD
BKH Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Axial ± (mm)max.
Lateral ± (mm)max.
Angular ± (degree)max.
Axial spring stiffness (N/mm)Ca
Lateral spring stiffness (N/mm)Cr
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Hub material
Distance (mm)H-2
CAD Portal
BKH Serien500
Rated torque (Nm)TKN500
Overall length (mm)A-2133 | 146
Fit length (mm)C51
Inside diameter possible from Ø to Ø H7 (mm)
D1/D235-60
Outside diameter (mm)B124
Moment of inertia (10-3 kgm2)Jges.17,3 | 19,6
Approximate weight (kg)7,5
Torsional stiffness (10³ Nm/rad)CT510 | 500
Axial ± (mm)max.2,5 | 3,5
Lateral ± (mm)max.0,3 | 0,35
Angular ± (degree)max.1|1,5
Axial spring stiffness (N/mm)Ca70 | 48
Lateral spring stiffness (N/mm)Cr2500 | 840
Fastening screw ISO 4762EM16
Tightening torque of the fastening screw (Nm)E200
Distance between centerlines (mm)F41
Distance (mm)G16,5
Hub materialSteel
optional Aluminium
Distance (mm)H-262 | 75
500
CAD
BKH Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Axial ± (mm)max.
Lateral ± (mm)max.
Angular ± (degree)max.
Axial spring stiffness (N/mm)Ca
Lateral spring stiffness (N/mm)Cr
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Hub material
Distance (mm)H-2
CAD Portal
BKH Serien800
Rated torque (Nm)TKN800
Overall length (mm)A-2140
Fit length (mm)C45
Inside diameter possible from Ø to Ø H7 (mm)
D1/D240-75
Outside diameter (mm)B134
Moment of inertia (10-3 kgm2)Jges.24,3
Approximate weight (kg)7
Torsional stiffness (10³ Nm/rad)CT780
Axial ± (mm)max.3,5
Lateral ± (mm)max.0,35
Angular ± (degree)max.1,5
Axial spring stiffness (N/mm)Ca100
Lateral spring stiffness (N/mm)Cr2000
Fastening screw ISO 4762EM16
Tightening torque of the fastening screw (Nm)E250
Distance between centerlines (mm)F48
Distance (mm)G18
Hub materialSteel
Distance (mm)H-265,5
800
CAD
BKH Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Axial ± (mm)max.
Lateral ± (mm)max.
Angular ± (degree)max.
Axial spring stiffness (N/mm)Ca
Lateral spring stiffness (N/mm)Cr
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Hub material
Distance (mm)H-2
CAD Portal
BKH Serien1500
Rated torque (Nm)TKN1500
Overall length (mm)A-2166
Fit length (mm)C55
Inside diameter possible from Ø to Ø H7 (mm)
D1/D250-80
Outside diameter (mm)B157
Moment of inertia (10-3 kgm2)Jges.49,2
Approximate weight (kg)12
Torsional stiffness (10³ Nm/rad)CT1304
Axial ± (mm)max.3,5
Lateral ± (mm)max.0,35
Angular ± (degree)max.1,5
Axial spring stiffness (N/mm)Ca320
Lateral spring stiffness (N/mm)Cr3600
Fastening screw ISO 4762EM20
Tightening torque of the fastening screw (Nm)E470
Distance between centerlines (mm)F55
Distance (mm)G22,5
Hub materialSteel
Distance (mm)H-271
1500
CAD

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