BKL
Metal Bellows Coupling Economy Class with clamping hub

2 - 500 Nm

BKL METAL BELLOWS COUPLING ECONOMY CLASS WITH CLAMPING HUB

BKL

Specifications BKL

BKL 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
CAD Portal
BKL Serien2
Rated torque (Nm)TKN2
Overall length (mm)A-230
Fit length (mm)C10,5
Inside diameter possible from Ø to Ø H7 (mm)
D1/D24-12,7
Outside diameter (mm)B25
Moment of inertia (10-3 kgm2)Jges.0,002
Approximate weight (kg)0,02
Torsional stiffness (10³ Nm/rad)CT1,5
Axial ± (mm)max.0,5
Lateral ± (mm)max.0,2
Angular ± (degree)max.1
Axial spring stiffness (N/mm)Ca8
Lateral spring stiffness (N/mm)Cr50
Fastening screw ISO 4762EM3
Tightening torque of the fastening screw (Nm)E2,3
Distance between centerlines (mm)F8
Distance (mm)G4
Hub materialAluminium
optional Steel
2
CAD
BKL 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
CAD Portal
BKL Serien4,5
Rated torque (Nm)TKN4,5
Overall length (mm)A-240
Fit length (mm)C13
Inside diameter possible from Ø to Ø H7 (mm)
D1/D26-16
Outside diameter (mm)B32
Moment of inertia (10-3 kgm2)Jges.0,007
Approximate weight (kg)0,05
Torsional stiffness (10³ Nm/rad)CT7
Axial ± (mm)max.1
Lateral ± (mm)max.0,2
Angular ± (degree)max.1
Axial spring stiffness (N/mm)Ca35
Lateral spring stiffness (N/mm)Cr350
Fastening screw ISO 4762EM4
Tightening torque of the fastening screw (Nm)E4
Distance between centerlines (mm)F11
Distance (mm)G5
Hub materialAluminium
optional Steel
4,5
CAD
BKL 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
CAD Portal
BKL Serien10
Rated torque (Nm)TKN10
Overall length (mm)A-244
Fit length (mm)C13
Inside diameter possible from Ø to Ø H7 (mm)
D1/D26-24
Outside diameter (mm)B40
Moment of inertia (10-3 kgm2)Jges.0,016
Approximate weight (kg)0,06
Torsional stiffness (10³ Nm/rad)CT9
Axial ± (mm)max.1
Lateral ± (mm)max.0,2
Angular ± (degree)max.1
Axial spring stiffness (N/mm)Ca30
Lateral spring stiffness (N/mm)Cr320
Fastening screw ISO 4762EM4
Tightening torque of the fastening screw (Nm)E4,5
Distance between centerlines (mm)F14
Distance (mm)G5
Hub materialAluminium
optional Steel
10
CAD
BKL 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
CAD Portal
BKL Serien15
Rated torque (Nm)TKN15
Overall length (mm)A-258
Fit length (mm)C21,5
Inside diameter possible from Ø to Ø H7 (mm)
D1/D28-28
Outside diameter (mm)B49
Moment of inertia (10-3 kgm2)Jges.0,065
Approximate weight (kg)0,16
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
Distance (mm)G6,5
Hub materialAluminium
optional Steel
15
CAD
BKL 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
CAD Portal
BKL Serien30
Rated torque (Nm)TKN30
Overall length (mm)A-268
Fit length (mm)C26
Inside diameter possible from Ø to Ø H7 (mm)
D1/D210-32
Outside diameter (mm)B56
Moment of inertia (10-3 kgm2)Jges.0,12
Approximate weight (kg)0,25
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
Hub materialAluminium
optional Steel
30
CAD
BKL 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
CAD Portal
BKL Serien60
Rated torque (Nm)TKN60
Overall length (mm)A-279
Fit length (mm)C28
Inside diameter possible from Ø to Ø H7 (mm)
D1/D214-35
Outside diameter (mm)B66
Moment of inertia (10-3 kgm2)Jges.0,3
Approximate weight (kg)0,4
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
Hub materialAluminium
optional Steel
60
CAD
BKL 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
CAD Portal
BKL Serien80
Rated torque (Nm)TKN80
Overall length (mm)A-292
Fit length (mm)C32,5
Inside diameter possible from Ø to Ø H7 (mm)
D1/D216-42
Outside diameter (mm)B82
Moment of inertia (10-3 kgm2)Jges.0,75
Approximate weight (kg)0,7
Torsional stiffness (10³ Nm/rad)CT80
Axial ± (mm)max.2
Lateral ± (mm)max.0,2
Angular ± (degree)max.1
Axial spring stiffness (N/mm)Ca44
Lateral spring stiffness (N/mm)Cr590
Fastening screw ISO 4762EM10
Tightening torque of the fastening screw (Nm)E70
Distance between centerlines (mm)F27
Distance (mm)G11
Hub materialAluminium
optional Steel
80
CAD
BKL 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
CAD Portal
BKL Serien150
Rated torque (Nm)TKN150
Overall length (mm)A-292
Fit length (mm)C32,5
Inside diameter possible from Ø to Ø H7 (mm)
D1/D219-42
Outside diameter (mm)B82
Moment of inertia (10-3 kgm2)Jges.1,8 | 0,8
Approximate weight (kg)1,7 | 0,75
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)E85
Distance between centerlines (mm)F27
Distance (mm)G11
Hub materialSteel
optional Aluminium
150
CAD
BKL 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
CAD Portal
BKL Serien300
Rated torque (Nm)TKN300
Overall length (mm)A-2109
Fit length (mm)C41
Inside diameter possible from Ø to Ø H7 (mm)
D1/D224-60
Outside diameter (mm)B110
Moment of inertia (10-3 kgm2)Jges.7,5 | 3,1
Approximate weight (kg)3,8 | 1,6
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
Hub materialSteel
optional Aluminium
300
CAD
BKL 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
CAD Portal
BKL Serien500
Rated torque (Nm)TKN500
Overall length (mm)A-2114
Fit length (mm)C42,5
Inside diameter possible from Ø to Ø H7 (mm)
D1/D235-62
Outside diameter (mm)B123
Moment of inertia (10-3 kgm2)Jges.11,7 | 4,9
Approximate weight (kg)4,9 | 2,1
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)Cr1450
Fastening screw ISO 4762EM16
Tightening torque of the fastening screw (Nm)E200
Distance between centerlines (mm)F41
Distance (mm)G17
Hub materialSteel
optional Aluminium
500
CAD

Properties

  • Design:
    • With a single ISO 4762 radial clamping screw per hub.
    • Self opening clamp system optional: Loosening the clamping screw applies force to the pin, which will force the clamp into the open position for easy mounting and dismounting.
  • Temperature range: -30° C to +100° C (-22° F to +212° F)
  • Backlash: Absolutely backlash-free due to frictional clamped connection.
  • Service life: These couplings have an infinite life and 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
  • Speeds: Up to 10,000 rpm, in excess of 10,000 with
a finely balanced version.
  • Non-standard applications: Custom designs with varied tolerances, keyways, non-standard material,
bellows and ATEX designs are available upon request.
  • Properties of Bellows Coupling model BKL:
    • economically priced
    • low moment of inertia
    • easy to mount
  • Design: With a single radial clamping screw per hub ISO 4762.
  • Temperature range: -40° C to +200° C (-40° F to +392° F)
  • Backlash: Absolutely backlash-free.
  • Material:
    • Bellows are made of highly flexible high-grade stainless steel
    • Hubs are made of aluminium
  • Compensating of misalignment:
    • Lateral misalignment up to 0,2 mm.

    • Axial misalignment up to 1 mm.
    • Angular misalignment up to 2° degree.
  • Speeds: Up to 10,000 rpm, in excess of 10,000 rpm with balanced version.
  • Properties of Miniature Coupling model BKL:
    • backlash-free and torsionally rigid
    • compensates for 3-axis of misalignment
    • low cost


Overview