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

  • BK1
  • Specifications BK1

    BK1 Series
    Rated torque (Nm)TKN
    Overall length (mm)A-2
    Outside diameter of bellows (mm)B
    Fit length/thread depth (mm)C
    Inside diameter H7 (mm)
    D
    Fastening threadsE
    Bolt circle diameter ± 0.2 (mm)F
    Outside diameter f7 (mm)G
    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
    CAD Portal
    BK1 Serien15
    Rated torque (Nm)TKN15
    Overall length (mm)A-230 | 37
    Outside diameter of bellows (mm)B49
    Fit length/thread depth (mm)C7,5
    Inside diameter H7 (mm)D25
    Fastening threadsE6 x M5
    Bolt circle diameter ± 0.2 (mm)F35
    Outside diameter f7 (mm)G49
    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
    15
    CAD
    BK1 Series
    Rated torque (Nm)TKN
    Overall length (mm)A-2
    Outside diameter of bellows (mm)B
    Fit length/thread depth (mm)C
    Inside diameter H7 (mm)
    D
    Fastening threadsE
    Bolt circle diameter ± 0.2 (mm)F
    Outside diameter f7 (mm)G
    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
    CAD Portal
    BK1 Serien30
    Rated torque (Nm)TKN30
    Overall length (mm)A-236 | 44
    Outside diameter of bellows (mm)B55
    Fit length/thread depth (mm)C10
    Inside diameter H7 (mm)D28
    Fastening threadsE6 x M5
    Bolt circle diameter ± 0.2 (mm)F37
    Outside diameter f7 (mm)G55
    Moment of inertia (10-3 kgm2)Jges.0,14 | 0,15
    Approximate weight (kg)0,2
    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
    30
    CAD
    BK1 Series
    Rated torque (Nm)TKN
    Overall length (mm)A-2
    Outside diameter of bellows (mm)B
    Fit length/thread depth (mm)C
    Inside diameter H7 (mm)
    D
    Fastening threadsE
    Bolt circle diameter ± 0.2 (mm)F
    Outside diameter f7 (mm)G
    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
    CAD Portal
    BK1 Serien60
    Rated torque (Nm)TKN60
    Overall length (mm)A-243 | 53
    Outside diameter of bellows (mm)B66
    Fit length/thread depth (mm)C11
    Inside diameter H7 (mm)D38
    Fastening threadsE6 x M6
    Bolt circle diameter ± 0.2 (mm)F46
    Outside diameter f7 (mm)G66
    Moment of inertia (10-3 kgm2)Jges.0,30 | 0,32
    Approximate weight (kg)0,3
    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
    60
    CAD
    BK1 Series
    Rated torque (Nm)TKN
    Overall length (mm)A-2
    Outside diameter of bellows (mm)B
    Fit length/thread depth (mm)C
    Inside diameter H7 (mm)
    D
    Fastening threadsE
    Bolt circle diameter ± 0.2 (mm)F
    Outside diameter f7 (mm)G
    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
    CAD Portal
    BK1 Serien150
    Rated torque (Nm)TKN150
    Overall length (mm)A-250 | 62
    Outside diameter of bellows (mm)B81
    Fit length/thread depth (mm)C13
    Inside diameter H7 (mm)D50
    Fastening threadsE6 x M6
    Bolt circle diameter ± 0.2 (mm)F62
    Outside diameter f7 (mm)G81
    Moment of inertia (10-3 kgm2)Jges.0,90 | 0,95
    Approximate weight (kg)0,6
    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
    150
    CAD
    BK1 Series
    Rated torque (Nm)TKN
    Overall length (mm)A-2
    Outside diameter of bellows (mm)B
    Fit length/thread depth (mm)C
    Inside diameter H7 (mm)
    D
    Fastening threadsE
    Bolt circle diameter ± 0.2 (mm)F
    Outside diameter f7 (mm)G
    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
    CAD Portal
    BK1 Serien200
    Rated torque (Nm)TKN200
    Overall length (mm)A-253 | 65
    Outside diameter of bellows (mm)B90
    Fit length/thread depth (mm)C14,5
    Inside diameter H7 (mm)D58
    Fastening threadsE6 x M6
    Bolt circle diameter ± 0.2 (mm)F70
    Outside diameter f7 (mm)G90
    Moment of inertia (10-3 kgm2)Jges.1,30 | 1,40
    Approximate weight (kg)0,8
    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
    200
    CAD
    BK1 Series
    Rated torque (Nm)TKN
    Overall length (mm)A-2
    Outside diameter of bellows (mm)B
    Fit length/thread depth (mm)C
    Inside diameter H7 (mm)
    D
    Fastening threadsE
    Bolt circle diameter ± 0.2 (mm)F
    Outside diameter f7 (mm)G
    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
    CAD Portal
    BK1 Serien300
    Rated torque (Nm)TKN300
    Overall length (mm)A-256 | 70
    Outside diameter of bellows (mm)B110
    Fit length/thread depth (mm)C15
    Inside diameter H7 (mm)D65
    Fastening threadsE6 x M8
    Bolt circle diameter ± 0.2 (mm)F80
    Outside diameter f7 (mm)G110
    Moment of inertia (10-3 kgm2)Jges.1,95 | 2,10
    Approximate weight (kg)1,35
    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
    300
    CAD
    BK1 Series
    Rated torque (Nm)TKN
    Overall length (mm)A-2
    Outside diameter of bellows (mm)B
    Fit length/thread depth (mm)C
    Inside diameter H7 (mm)
    D
    Fastening threadsE
    Bolt circle diameter ± 0.2 (mm)F
    Outside diameter f7 (mm)G
    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
    CAD Portal
    BK1 Serien500
    Rated torque (Nm)TKN500
    Overall length (mm)A-264 | 77
    Outside diameter of bellows (mm)B124
    Fit length/thread depth (mm)C16
    Inside diameter H7 (mm)D70
    Fastening threadsE6 x M8
    Bolt circle diameter ± 0.2 (mm)F94
    Outside diameter f7 (mm)G122
    Moment of inertia (10-3 kgm2)Jges.3,0 | 3,4
    Approximate weight (kg)1,8
    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
    500
    CAD
    BK1 Series
    Rated torque (Nm)TKN
    Overall length (mm)A-2
    Outside diameter of bellows (mm)B
    Fit length/thread depth (mm)C
    Inside diameter H7 (mm)
    D
    Fastening threadsE
    Bolt circle diameter ± 0.2 (mm)F
    Outside diameter f7 (mm)G
    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
    CAD Portal
    BK1 Serien800
    Rated torque (Nm)TKN800
    Overall length (mm)A-281
    Outside diameter of bellows (mm)B133
    Fit length/thread depth (mm)C18
    Inside diameter H7 (mm)D75
    Fastening threadsE6 x M10
    Bolt circle diameter ± 0.2 (mm)F90
    Outside diameter f7 (mm)G116
    Moment of inertia (10-3 kgm2)Jges.4,3
    Approximate weight (kg)1,9
    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
    800
    CAD
    BK1 Series
    Rated torque (Nm)TKN
    Overall length (mm)A-2
    Outside diameter of bellows (mm)B
    Fit length/thread depth (mm)C
    Inside diameter H7 (mm)
    D
    Fastening threadsE
    Bolt circle diameter ± 0.2 (mm)F
    Outside diameter f7 (mm)G
    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
    CAD Portal
    BK1 Serien1500
    Rated torque (Nm)TKN1500
    Overall length (mm)A-2100
    Outside diameter of bellows (mm)B157
    Fit length/thread depth (mm)C22
    Inside diameter H7 (mm)D85
    Fastening threadsE6 x M16
    Bolt circle diameter ± 0.2 (mm)F110
    Outside diameter f7 (mm)G140
    Moment of inertia (10-3 kgm2)Jges.10,6
    Approximate weight (kg)3,3
    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
    1500
    CAD
    BK1 Series
    Rated torque (Nm)TKN
    Overall length (mm)A-2
    Outside diameter of bellows (mm)B
    Fit length/thread depth (mm)C
    Inside diameter H7 (mm)
    D
    Fastening threadsE
    Bolt circle diameter ± 0.2 (mm)F
    Outside diameter f7 (mm)G
    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
    CAD Portal
    BK1 Serien4000
    Rated torque (Nm)TKN4000
    Overall length (mm)A-2145
    Outside diameter of bellows (mm)B200
    Fit length/thread depth (mm)C30
    Inside diameter H7 (mm)D100
    Fastening threadsE6 x M20
    Bolt circle diameter ± 0.2 (mm)F140
    Outside diameter f7 (mm)G182
    Moment of inertia (10-3 kgm2)Jges.46
    Approximate weight (kg)8,9
    Torsional stiffness (10³ Nm/rad)CT3400
    Axial ± (mm))max.3,5
    Lateral ± (mm)max.0,4
    Angular ± (degree)max.1,5
    Axial spring stiffness (N/mm)Ca565
    Lateral spring stiffness (N/mm)Cr6070
    4000
    CAD
    BK1 Series
    Rated torque (Nm)TKN
    Overall length (mm)A-2
    Outside diameter of bellows (mm)B
    Fit length/thread depth (mm)C
    Inside diameter H7 (mm)
    D
    Fastening threadsE
    Bolt circle diameter ± 0.2 (mm)F
    Outside diameter f7 (mm)G
    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
    CAD Portal
    BK1 Serien6000
    Rated torque (Nm)TKN6000
    Overall length (mm)A-2138
    Outside diameter of bellows (mm)B253
    Fit length/thread depth (mm)C30
    Inside diameter H7 (mm)D145
    Fastening threadsE8 x M20
    Bolt circle diameter ± 0.2 (mm)F190
    Outside diameter f7 (mm)G235
    Moment of inertia (10-3 kgm2)Jges.132
    Approximate weight (kg)13,9
    Torsional stiffness (10³ Nm/rad)CT5700
    Axial ± (mm))max.3
    Lateral ± (mm)max.0,4
    Angular ± (degree)max.1,5
    Axial spring stiffness (N/mm)Ca1030
    Lateral spring stiffness (N/mm)Cr19200
    6000
    CAD
    BK1 Series
    Rated torque (Nm)TKN
    Overall length (mm)A-2
    Outside diameter of bellows (mm)B
    Fit length/thread depth (mm)C
    Inside diameter H7 (mm)
    D
    Fastening threadsE
    Bolt circle diameter ± 0.2 (mm)F
    Outside diameter f7 (mm)G
    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
    CAD Portal
    BK1 Serien10000
    Rated torque (Nm)TKN10000
    Overall length (mm)A-2150
    Outside diameter of bellows (mm)B303
    Fit length/thread depth (mm)C36
    Inside diameter H7 (mm)D190
    Fastening threadsE8 x M24
    Bolt circle diameter ± 0.2 (mm)F234
    Outside diameter f7 (mm)G295
    Moment of inertia (10-3 kgm2)Jges.350
    Approximate weight (kg)23,7
    Torsional stiffness (10³ Nm/rad)CT10950
    Axial ± (mm))max.3
    Lateral ± (mm)max.0,4
    Angular ± (degree)max.1,5
    Axial spring stiffness (N/mm)Ca985
    Lateral spring stiffness (N/mm)Cr21800
    10000
    CAD

    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