BK6
Metal Bellows Coupling with conical sleeve and tapered press-fit connection

15 - 1,500 Nm

BK6 METAL BELLOWS COUPLING WITH CONICAL SLEEVE AND TAPERED PRESS-FIT CONNECTION

BK6

Specifications BK6

BK6 Series
Rated torque (Nm)TKN
Overall length (inserted) (mm)A+0,5
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
Diameter of clamping ring (mm)F
Clamping ring length (mm)G
CAD Portal
BK6 Serien15
Rated torque (Nm)TKN15
Overall length (inserted) (mm)A+0,558 | 65
Inside diameter possible from Ø to Ø H7 (mm)
D110-22
Inside diameter possible from Ø to Ø H7 (mm)
D210-22
Outside diameter (mm)B49
Moment of inertia (10-3 kgm2)Jges.0,1 | 0,12
Approximate weight (kg)0,3 | 0,32
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 4762EM4
Tightening torque of the fastening screw (Nm)E3,5
Mounting length (mm)C113,5
Mounting length (mm)C229
Preload compression (mm)H0,2-1,0
Axial recovery force at maximum pretensioning (N)H20 | 12
Axial* ± (mm)max.0,5 | 1
Diameter of clamping ring (mm)F46,5
Clamping ring length (mm)G9,5
15
CAD
BK6 Series
Rated torque (Nm)TKN
Overall length (inserted) (mm)A+0,5
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
Diameter of clamping ring (mm)F
Clamping ring length (mm)G
CAD Portal
BK6 Serien30
Rated torque (Nm)TKN30
Overall length (inserted) (mm)A+0,568 | 76
Inside diameter possible from Ø to Ø H7 (mm)
D112-24
Inside diameter possible from Ø to Ø H7 (mm)
D212-24
Outside diameter (mm)B55
Moment of inertia (10-3 kgm2)Jges.0,2 | 0,25
Approximate weight (kg)0,5 | 0,52
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 4762EM5
Tightening torque of the fastening screw (Nm)E6,5
Mounting length (mm)C121,5
Mounting length (mm)C234
Preload compression (mm)H0,5-1,0
Axial recovery force at maximum pretensioning (N)H50 | 30
Axial* ± (mm)max.0,5 | 1
Diameter of clamping ring (mm)F51
Clamping ring length (mm)G10,5
30
CAD
BK6 Series
Rated torque (Nm)TKN
Overall length (inserted) (mm)A+0,5
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
Diameter of clamping ring (mm)F
Clamping ring length (mm)G
CAD Portal
BK6 Serien60
Rated torque (Nm)TKN60
Overall length (inserted) (mm)A+0,579 | 89
Inside diameter possible from Ø to Ø H7 (mm)
D112-32
Inside diameter possible from Ø to Ø H7 (mm)
D212-32
Outside diameter (mm)B66
Moment of inertia (10-3 kgm2)Jges.0,4 | 0,45
Approximate weight (kg)0,82 | 0,84
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 4762EM5
Tightening torque of the fastening screw (Nm)E8
Mounting length (mm)C118
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
Diameter of clamping ring (mm)F60
Clamping ring length (mm)G11,5
60
CAD
BK6 Series
Rated torque (Nm)TKN
Overall length (inserted) (mm)A+0,5
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
Diameter of clamping ring (mm)F
Clamping ring length (mm)G
CAD Portal
BK6 Serien150
Rated torque (Nm)TKN150
Overall length (inserted) (mm)A+0,597 | 109
Inside diameter possible from Ø to Ø H7 (mm)
D115-40
Inside diameter possible from Ø to Ø H7 (mm)
D215-40
Outside diameter (mm)B81
Moment of inertia (10-3 kgm2)Jges.2,0 | 2,5
Approximate weight (kg)1,6 | 1,7
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 4762EM6
Tightening torque of the fastening screw (Nm)E12
Mounting length (mm)C123,5
Mounting length (mm)C249,5
Preload compression (mm)H0,5-1,5
Axial recovery force at maximum pretensioning (N)H82 | 52
Axial* ± (mm)max.1 | 2
Diameter of clamping ring (mm)F74
Clamping ring length (mm)G17,5
150
CAD
BK6 Series
Rated torque (Nm)TKN
Overall length (inserted) (mm)A+0,5
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
Diameter of clamping ring (mm)F
Clamping ring length (mm)G
CAD Portal
BK6 Serien300
Rated torque (Nm)TKN300
Overall length (inserted) (mm)A+0,5113 | 127
Inside diameter possible from Ø to Ø H7 (mm)
D124-56
Inside diameter possible from Ø to Ø H7 (mm)
D224-56
Outside diameter (mm)B110
Moment of inertia (10-3 kgm2)Jges.5,4 | 6,1
Approximate weight (kg)4,1 | 4,2
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 4762EM8
Tightening torque of the fastening screw (Nm)E30
Mounting length (mm)C127
Mounting length (mm)C259
Preload compression (mm)H0,5-1,5
Axial recovery force at maximum pretensioning (N)H157 | 106
Axial* ± (mm)max.1,5 | 2
Diameter of clamping ring (mm)F102
Clamping ring length (mm)G20
300
CAD
BK6 Series
Rated torque (Nm)TKN
Overall length (inserted) (mm)A+0,5
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
Diameter of clamping ring (mm)F
Clamping ring length (mm)G
CAD Portal
BK6 Serien500
Rated torque (Nm)TKN500
Overall length (inserted) (mm)A+0,5132 | 145
Inside diameter possible from Ø to Ø H7 (mm)
D130-60
Inside diameter possible from Ø to Ø H7 (mm)
D230-60
Outside diameter (mm)B124
Moment of inertia (10-3 kgm2)Jges.8,4 | 9,1
Approximate weight (kg)6,0 | 6,3
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 4762EM8
Tightening torque of the fastening screw (Nm)E32
Mounting length (mm)C132
Mounting length (mm)C268
Preload compression (mm)H1,0-2,0
Axial recovery force at maximum pretensioning (N)H140 | 96
Axial* ± (mm)max.2,5 | 3,5
Diameter of clamping ring (mm)F114
Clamping ring length (mm)G23
500
CAD
BK6 Series
Rated torque (Nm)TKN
Overall length (inserted) (mm)A+0,5
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
Diameter of clamping ring (mm)F
Clamping ring length (mm)G
CAD Portal
BK6 Serien800
Rated torque (Nm)TKN800
Overall length (inserted) (mm)A+0,5140
Inside diameter possible from Ø to Ø H7 (mm)
D140-62
Inside diameter possible from Ø to Ø H7 (mm)
D240-62
Outside diameter (mm)B133
Moment of inertia (10-3 kgm2)Jges.17,5
Approximate weight (kg)8,1
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 4762EM10
Tightening torque of the fastening screw (Nm)E55
Mounting length (mm)C142
Mounting length (mm)C274
Preload compression (mm)H1,0-2,0
Axial recovery force at maximum pretensioning (N)H400
Axial* ± (mm)max.3
Diameter of clamping ring (mm)F126
Clamping ring length (mm)G27
800
CAD
BK6 Series
Rated torque (Nm)TKN
Overall length (inserted) (mm)A+0,5
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
Mounting length (mm)C1
Mounting length (mm)C2
Preload compression (mm)H
Axial recovery force at maximum pretensioning (N)H
Axial* ± (mm)max.
Diameter of clamping ring (mm)F
Clamping ring length (mm)G
CAD Portal
BK6 Serien1500
Rated torque (Nm)TKN1500
Overall length (inserted) (mm)A+0,5158
Inside diameter possible from Ø to Ø H7 (mm)
D150-75
Inside diameter possible from Ø to Ø H7 (mm)
D250-75
Outside diameter (mm)B157
Moment of inertia (10-3 kgm2)Jges.44
Approximate weight (kg)16,2
Torsional stiffness (10³ Nm/rad)CT660
Lateral ± (mm)max.0,35
Angular ± (degree)max.1,5
Lateral spring stiffness (N/mm)Cr3600
Fastening screw ISO 4762EM12
Tightening torque of the fastening screw (Nm)E110
Mounting length (mm)C153
Mounting length (mm)C290,5
Preload compression (mm)H0,5-1,5
Axial recovery force at maximum pretensioning (N)H650
Axial* ± (mm)max.2
Diameter of clamping ring (mm)F146
Clamping ring length (mm)G32
1500
CAD

Properties

  • Design:
    • One side concial sleeve with 6 fastening screws
ISO 4762 and 3 draw-off threads.
    •  One side with
backlash-free tapered concial sleeve with press
fit connection and 3 draw-off screws
  • Temperature range: -30° C to +100° C (-22° F to +212° F)
  • Backlash: Absolutely backlash-free.
  • Service life: The BK6 bellows couplings are maintenance-free and have an infinite life, if the tolerances 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
    • conical sleeves and tapered segment on bellows face are made of steel.
    • Tapered segment on hub face: glass-fiber
rein forced plastic molded onto a steel hub.
  • Brief overload: Acceptable up to 1.5 times the value specified.
  • Speeds: Up to 10,000 rpm, in excess of 10,000 rpm available with a finaly balanced version.
  • Non-standard application: Custom designs with varied tolerances, keyways, non-standard
material and bellows are available upon request.
  • Properties of Bellows Coupling model BK6:
    • for axial mounting
    • absolutely backlash-free
    • easy mounting and dismounting
    • electrically and thermally insulated
    • high degree of operating dependability
    • torsionally rigid
    • wear-free press-fit connection


Overview