BKS
Metal Bellows Coupling with stainless steel clamping hub

15 - 500 Nm

BKS METAL BELLOWS COUPLING WITH STAINLESS STEEL CLAMPING HUB

BKS

Specifications BKS

BKS 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 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Speed max. with G = 2.5 balancing (min-1)
CAD Portal
BKS Serien15
Rated torque (Nm)TKN15
Overall length (mm)A-245
Fit length (mm)C17
Inside diameter* possible from Ø to Ø H7 (mm)
D1/D212-28
Outside diameter (mm)B49
Moment of inertia (10-3 kgm2)Jges.0,1
Approximate weight (kg)0,27
Torsional stiffness (10³ Nm/rad)CT23
Axial ± (mm))max.1
Lateral ± (mm)max.0,2
Angular ± (degree)max.1
Axial spring stiffness (N/mm)Ca30
Lateral spring stiffness (N/mm)Cr315
Fastening screw ISO 4762EM5
Tightening torque of the fastening screw (Nm)E8
Distance between centerlines (mm)F17,5
Distance (mm)G6
Speed max. with G = 2.5 balancing (min-1)60000
15
CAD
BKS 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 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Speed max. with G = 2.5 balancing (min-1)
CAD Portal
BKS Serien30
Rated torque (Nm)TKN30
Overall length (mm)A-252
Fit length (mm)C20
Inside diameter* possible from Ø to Ø H7 (mm)
D1/D214-32
Outside diameter (mm)B56
Moment of inertia (10-3 kgm2)Jges.0,2
Approximate weight (kg)0,42
Torsional stiffness (10³ Nm/rad)CT31
Axial ± (mm))max.1
Lateral ± (mm)max.0,2
Angular ± (degree)max.1
Axial spring stiffness (N/mm)Ca50
Lateral spring stiffness (N/mm)Cr366
Fastening screw ISO 4762EM6
Tightening torque of the fastening screw (Nm)E15
Distance between centerlines (mm)F20
Distance (mm)G7,5
Speed max. with G = 2.5 balancing (min-1)50500
30
CAD
BKS 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 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Speed max. with G = 2.5 balancing (min-1)
CAD Portal
BKS Serien60
Rated torque (Nm)TKN60
Overall length (mm)A-266
Fit length (mm)C24
Inside diameter* possible from Ø to Ø H7 (mm)
D1/D216-35
Outside diameter (mm)B66
Moment of inertia (10-3 kgm2)Jges.0,53
Approximate weight (kg)0,78
Torsional stiffness (10³ Nm/rad)CT72
Axial ± (mm))max.1,5
Lateral ± (mm)max.0,2
Angular ± (degree)max.1
Axial spring stiffness (N/mm)Ca67
Lateral spring stiffness (N/mm)Cr679
Fastening screw ISO 4762EM8
Tightening torque of the fastening screw (Nm)E40
Distance between centerlines (mm)F23
Distance (mm)G9,5
Speed max. with G = 2.5 balancing (min-1)50000
60
CAD
BKS 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 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Speed max. with G = 2.5 balancing (min-1)
CAD Portal
BKS Serien150
Rated torque (Nm)TKN150
Overall length (mm)A-276
Fit length (mm)C30
Inside diameter* possible from Ø to Ø H7 (mm)
D1/D219-42
Outside diameter (mm)B82
Moment of inertia (10-3 kgm2)Jges.1,5
Approximate weight (kg)1,5
Torsional stiffness (10³ Nm/rad)CT141
Axial ± (mm))max.2
Lateral ± (mm)max.0,2
Angular ± (degree)max.1
Axial spring stiffness (N/mm)Ca77
Lateral spring stiffness (N/mm)Cr960
Fastening screw ISO 4762EM10
Tightening torque of the fastening screw (Nm)E75
Distance between centerlines (mm)F27
Distance (mm)G11
Speed max. with G = 2.5 balancing (min-1)40500
150
CAD
BKS 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 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Speed max. with G = 2.5 balancing (min-1)
CAD Portal
BKS Serien300
Rated torque (Nm)TKN300
Overall length (mm)A-289
Fit length (mm)C34
Inside diameter* possible from Ø to Ø H7 (mm)
D1/D224-60
Outside diameter (mm)B110
Moment of inertia (10-3 kgm2)Jges.5,5
Approximate weight (kg)2,9
Torsional stiffness (10³ Nm/rad)CT157
Axial ± (mm))max.2
Lateral ± (mm)max.0,2
Angular ± (degree)max.1
Axial spring stiffness (N/mm)Ca112
Lateral spring stiffness (N/mm)Cr2940
Fastening screw ISO 4762EM12
Tightening torque of the fastening screw (Nm)E120
Distance between centerlines (mm)F39
Distance (mm)G13
Speed max. with G = 2.5 balancing (min-1)40000
300
CAD
BKS 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 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Speed max. with G = 2.5 balancing (min-1)
CAD Portal
BKS Serien500
Rated torque (Nm)TKN500
Overall length (mm)A-295
Fit length (mm)C35
Inside diameter* possible from Ø to Ø H7 (mm)
D1/D232-75
Outside diameter (mm)B123
Moment of inertia (10-3 kgm2)Jges.8,1
Approximate weight (kg)3,5
Torsional stiffness (10³ Nm/rad)CT290
Axial ± (mm))max.2,5
Lateral ± (mm)max.0,2
Angular ± (degree)max.1
Axial spring stiffness (N/mm)Ca72
Lateral spring stiffness (N/mm)Cr2200
Fastening screw ISO 4762EM12
Tightening torque of the fastening screw (Nm)E125
Distance between centerlines (mm)F45
Distance (mm)G13
Speed max. with G = 2.5 balancing (min-1)30000
500
CAD

Properties

  • Design:
    • With a single ISO 4762 radial clamping screw per hub.
    • 
Laser welded connection between hubs and bellows.
    • Self opening clamp system optional: Loosening the clamping screw applies force to the pin, which forces the clamp into the open position for easy mounting and dismounting.
  • Temperature range: -40° C to +300° C (-40° F to +572° F)
  • Tolerance: Overall clearance between hub and shaft 0.01-0.05 mm.
  • Material:Bellows, clamping hubs, and clamping screws made from stainless steel; detailed specifications upon request.
  • Speeds: Up to 10,000 rpm;
in excess of 10,000 rpm with finely balanced version (up to G = 2.5).
  • Properties of Bellows Coupling Model BKS:
    • for high temperatures
    • compact
    • easy to mount
    • suited for space restricted installations


Overview