BKH
Metal Bellows Coupling with split hub

15 - 4,000 Nm

BKH METAL BELLOWS COUPLING WITH SPLIT HUB

  • BKH
  • Specifications BKH

    BKH Series
    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 4762)E
    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 4762)EM5
    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 Series
    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 4762)E
    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 4762)EM6
    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 Series
    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 4762)E
    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 4762)EM8
    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 Series
    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 4762)E
    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 4762)EM10
    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 Series
    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 4762)E
    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 4762)EM10
    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 Series
    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 4762)E
    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 4762)EM12
    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 Series
    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 4762)E
    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 4762)EM12
    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 Series
    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 4762)E
    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 4762)EM16
    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 Series
    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 4762)E
    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 4762)EM16
    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 Series
    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 4762)E
    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 4762)EM20
    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


    Overview