BK5
Metal Bellows Coupling with tapered press-fit connection

15 - 1,500 Nm

BK5 METAL BELLOWS COUPLING WITH TAPERED PRESS-FIT CONNECTION

BK5

Specifications BK5

BK5 Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Inside diameter possible from Ø to Ø H7 (mm)D1
Inside diameter possible from Ø to Ø H7 (mm)D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Lateral ± (mm)max.
Angular ± (degree)max.
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
CAD Portal
BK5 Serien15
Rated torque (Nm)TKN15
Overall length (mm)A-260 | 67
Inside diameter possible from Ø to Ø H7 (mm)
D18-28
Inside diameter possible from Ø to Ø H7 (mm)
D28-22
Outside diameter (mm)B49
Moment of inertia (10-3 kgm2)Jges.0,07 | 0,08
Approximate weight (kg)0,1 | 0,1
Torsional stiffness (10³ Nm/rad)CT10 | 8
Lateral ± (mm)max.0,15 | 0,2
Angular ± (degree)max.1|1,5
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
Mounting length (mm)C122
Mounting length (mm)C228
Preload compression (mm)H0,2-1,0
Axial recovery force at maximum pretensioning (N)H20 | 12
Axial* ± (mm)max.0,5 | 1
15
CAD
BK5 Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Inside diameter possible from Ø to Ø H7 (mm)D1
Inside diameter possible from Ø to Ø H7 (mm)D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Lateral ± (mm)max.
Angular ± (degree)max.
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
CAD Portal
BK5 Serien30
Rated torque (Nm)TKN30
Overall length (mm)A-271 | 79
Inside diameter possible from Ø to Ø H7 (mm)
D110-30
Inside diameter possible from Ø to Ø H7 (mm)
D210-25
Outside diameter (mm)B55
Moment of inertia (10-3 kgm2)Jges.0,14 | 0,15
Approximate weight (kg)0,3 | 0,3
Torsional stiffness (10³ Nm/rad)CT20 | 14
Lateral ± (mm)max.0,2 | 0,25
Angular ± (degree)max.1 | 1,5
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
Mounting length (mm)C127
Mounting length (mm)C233
Preload compression (mm)H0,5-1,0
Axial recovery force at maximum pretensioning (N)H50 | 30
Axial* ± (mm)max.0,5 | 1
30
CAD
BK5 Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Inside diameter possible from Ø to Ø H7 (mm)D1
Inside diameter possible from Ø to Ø H7 (mm)D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Lateral ± (mm)max.
Angular ± (degree)max.
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
CAD Portal
BK5 Serien60
Rated torque (Nm)TKN60
Overall length (mm)A-285 | 95
Inside diameter possible from Ø to Ø H7 (mm)
D112-35
Inside diameter possible from Ø to Ø H7 (mm)
D212-32
Outside diameter (mm)B66
Moment of inertia (10-3 kgm2)Jges.0,23 | 0,26
Approximate weight (kg)0,4 | 0,4
Torsional stiffness (10³ Nm/rad)CT38 | 28
Lateral ± (mm)max.0,2 | 0,25
Angular ± (degree)max.1 | 1,5
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
Mounting length (mm)C131
Mounting length (mm)C239
Preload compression (mm)H0,5-1,5
Axial recovery force at maximum pretensioning (N)H70 | 45
Axial* ± (mm)max.0,5 | 1
60
CAD
BK5 Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Inside diameter possible from Ø to Ø H7 (mm)D1
Inside diameter possible from Ø to Ø H7 (mm)D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Lateral ± (mm)max.
Angular ± (degree)max.
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
CAD Portal
BK5 Serien80
Rated torque (Nm)TKN80
Overall length (mm)A-294 | 106
Inside diameter possible from Ø to Ø H7 (mm)
D114-42
Inside diameter possible from Ø to Ø H7 (mm)
D214-38
Outside diameter (mm)B81
Moment of inertia (10-3 kgm2)Jges.0,65 | 0,67
Approximate weight (kg)0,9 | 0,9
Torsional stiffness (10³ Nm/rad)CT65 | 43
Lateral ± (mm)max.0,2 | 0,25
Angular ± (degree)max.1 | 1,5
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
Mounting length (mm)C136
Mounting length (mm)C243
Preload compression (mm)H0,5-1,5
Axial recovery force at maximum pretensioning (N)H48 | 32
Axial* ± (mm)max.1 | 2
80
CAD
BK5 Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Inside diameter possible from Ø to Ø H7 (mm)D1
Inside diameter possible from Ø to Ø H7 (mm)D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Lateral ± (mm)max.
Angular ± (degree)max.
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
CAD Portal
BK5 Serien150
Rated torque (Nm)TKN150
Overall length (mm)A-295 | 107
Inside diameter possible from Ø to Ø H7 (mm)
D114-42
Inside diameter possible from Ø to Ø H7 (mm)
D214-38
Outside diameter (mm)B81
Moment of inertia (10-3 kgm2)Jges.2,2 | 2,4
Approximate weight (kg)1,8 | 1,8
Torsional stiffness (10³ Nm/rad)CT88 | 55
Lateral ± (mm)max.0,2 | 0,25
Angular ± (degree)max.1 | 1,5
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
Mounting length (mm)C136
Mounting length (mm)C243
Preload compression (mm)H0,5-1,5
Axial recovery force at maximum pretensioning (N)H82 | 52
Axial* ± (mm)max.1 | 2
150
CAD
BK5 Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Inside diameter possible from Ø to Ø H7 (mm)D1
Inside diameter possible from Ø to Ø H7 (mm)D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Lateral ± (mm)max.
Angular ± (degree)max.
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
CAD Portal
BK5 Serien300
Rated torque (Nm)TKN300
Overall length (mm)A-2114 | 128
Inside diameter possible from Ø to Ø H7 (mm)
D124-60
Inside diameter possible from Ø to Ø H7 (mm)
D224-58
Outside diameter (mm)B110
Moment of inertia (10-3 kgm2)Jges.7,4 | 7,9
Approximate weight (kg)4 | 4
Torsional stiffness (10³ Nm/rad)CT225 | 175
Lateral ± (mm)max.0,25 | 0,3
Angular ± (degree)max.1 | 1,5
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
Mounting length (mm)C143
Mounting length (mm)C252
Preload compression (mm)H0,5-1,5
Axial recovery force at maximum pretensioning (N)H157 | 106
Axial* ± (mm)max.1,5 | 2
300
CAD
BK5 Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Inside diameter possible from Ø to Ø H7 (mm)D1
Inside diameter possible from Ø to Ø H7 (mm)D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Lateral ± (mm)max.
Angular ± (degree)max.
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
CAD Portal
BK5 Serien500
Rated torque (Nm)TKN500
Overall length (mm)A-2136 | 149
Inside diameter possible from Ø to Ø H7 (mm)
D135-60
Inside diameter possible from Ø to Ø H7 (mm)
D235-60
Outside diameter (mm)B124
Moment of inertia (10-3 kgm2)Jges.13,7 | 14,4
Approximate weight (kg)6,5 | 6,7
Torsional stiffness (10³ Nm/rad)CT255 | 245
Lateral ± (mm)max.0,3 | 0,35
Angular ± (degree)max.1 | 1,5
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
Mounting length (mm)C151
Mounting length (mm)C261
Preload compression (mm)H1,0-2,0
Axial recovery force at maximum pretensioning (N)H140 | 96
Axial* ± (mm)max.2,5 | 3,5
500
CAD
BK5 Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Inside diameter possible from Ø to Ø H7 (mm)D1
Inside diameter possible from Ø to Ø H7 (mm)D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Lateral ± (mm)max.
Angular ± (degree)max.
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
CAD Portal
BK5 Serien800
Rated torque (Nm)TKN800
Overall length (mm)A-2150
Inside diameter possible from Ø to Ø H7 (mm)
D140-75
Inside diameter possible from Ø to Ø H7 (mm)
D240-62
Outside diameter (mm)B133
Moment of inertia (10-3 kgm2)Jges.21,5
Approximate weight (kg)9
Torsional stiffness (10³ Nm/rad)CT400
Lateral ± (mm)max.0,35
Angular ± (degree)max.1,5
Lateral spring stiffness (N/mm)Cr2000
Fastening screw ISO 4762E2x M16*
Tightening torque of the fastening screw (Nm)E250
Distance between centerlines (mm)F2x 48*
Distance (mm)G18
Mounting length (mm)C145
Mounting length (mm)C274
Preload compression (mm)H1,0-2,5
Axial recovery force at maximum pretensioning (N)H200
Axial* ± (mm)max.3
800
CAD
BK5 Serien
Rated torque (Nm)TKN
Overall length (mm)A-2
Inside diameter possible from Ø to Ø H7 (mm)D1
Inside diameter possible from Ø to Ø H7 (mm)D2
Outside diameter (mm)B
Moment of inertia (10-3 kgm2)Jges.
Approximate weight (kg)
Torsional stiffness (10³ Nm/rad)CT
Lateral ± (mm)max.
Angular ± (degree)max.
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
CAD Portal
BK5 Serien1500
Rated torque (Nm)TKN1500
Overall length (mm)A-2176
Inside diameter possible from Ø to Ø H7 (mm)
D150-80
Inside diameter possible from Ø to Ø H7 (mm)
D250-75
Outside diameter (mm)B157
Moment of inertia (10-3 kgm2)Jges.51,4
Approximate weight (kg)15,3
Torsional stiffness (10³ Nm/rad)CT650
Lateral ± (mm)max.0,35
Angular ± (degree)max.1,5
Lateral spring stiffness (N/mm)Cr3600
Fastening screw ISO 4762E2x M20*
Tightening torque of the fastening screw (Nm)E470
Distance between centerlines (mm)F2x 55*
Distance (mm)G22,5
Mounting length (mm)C155
Mounting length (mm)C294
Preload compression (mm)H0,50-1,50
Axial recovery force at maximum pretensioning (N)H650
Axial* ± (mm)max.2
1500
CAD

Properties

  • Design:
    • One side with a single radial clamping screw ISO 4762.
    • One side includes backlash-free clamping hub and tapered press-fit
device.
    • Any imbalance of the clamping hub, is compensated with 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 and axial pretensioning of the tapered
press-fit segments.
  • 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 stain-
less steel
    • clamping hubs up to series 80 aluminium,
and 150 and up steel
    • Tapered segment on hub face:
glass-fiber reinforced plastic molded onto an
aluminium hub.
  • Speeds: Up to 10,000 rpm, over 10,000 rpm available with a finely balanced version.
  • Brief overloads: Acceptable up to 1.5 times the value specified.
  • Properties of Bellows Coupling model BK5:
    • absolutely backlash-free and torsionally rigid
    • easy mounting and dismounting
    • wear-free and maintenance-free
    • electrically and thermally insulated
    • low moment of inertia
    • compensation for misalignment


Overview