MK2
Miniature Bellows Coupling with clamping hub

0.5 - 10 Nm

MK2 MINIATURE BELLOWS COUPLING WITH CLAMPING HUB

MK2

Specifications MK2

MK2 Series
Rated torque (Nm)TKN
Overall lengthA-1
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/2
Outside diameter (mm)B
Moment of inertia (gcm2)Jges.
Torsional stiffness (10³ Nm/rad)CT
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Approximate weight (g)
Axial (mm)max.
Lateral (mm)max.
Angular (degree)max.
CAD Portal
MK2 Serien5
Rated torque (Nm)TKN0,5
Overall lengthA-125 | 28 | 31
Fit length (mm)C9
Inside diameter possible from Ø to Ø H7 (mm)
D1/23-7
Outside diameter (mm)B15
Moment of inertia (gcm2)Jges.2,6 | 2,8 | 3
Torsional stiffness (10³ Nm/rad)CT280 | 210 | 170
Fastening screw ISO 4762EM2
Tightening torque of the fastening screw (Nm)E0,43
Distance between centerlines (mm)F4,5
Distance (mm)G3
Approximate weight (g)9 | 9 | 9
Axial (mm)max.0,4 | 0,5 | 0,6
Lateral (mm)max.0,15 | 0,2 | 0,25
Angular (degree)max.1 | 1,5 | 2
5
CAD
MK2 Series
Rated torque (Nm)TKN
Overall lengthA-1
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/2
Outside diameter (mm)B
Moment of inertia (gcm2)Jges.
Torsional stiffness (10³ Nm/rad)CT
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Approximate weight (g)
Axial (mm)max.
Lateral (mm)max.
Angular (degree)max.
CAD Portal
MK2 Serien10
Rated torque (Nm)TKN1
Overall lengthA-127 | 30 | 33
Fit length (mm)C9
Inside diameter possible from Ø to Ø H7 (mm)
D1/23-7
Outside diameter (mm)B15
Moment of inertia (gcm2)Jges.3 | 3,4 | 3,6
Torsional stiffness (10³ Nm/rad)CT510 | 380 | 320
Fastening screw ISO 4762EM2
Tightening torque of the fastening screw (Nm)E0,43
Distance between centerlines (mm)F4,5
Distance (mm)G3
Approximate weight (g)9 | 10 | 11
Axial (mm)max.0,4 | 0,5 | 0,6
Lateral (mm)max.0,15 | 0,2 | 0,25
Angular (degree)max.1 | 1,5 | 2
10
CAD
MK2 Series
Rated torque (Nm)TKN
Overall lengthA-1
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/2
Outside diameter (mm)B
Moment of inertia (gcm2)Jges.
Torsional stiffness (10³ Nm/rad)CT
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Approximate weight (g)
Axial (mm)max.
Lateral (mm)max.
Angular (degree)max.
CAD Portal
MK2 Serien15
Rated torque (Nm)TKN1,5
Overall lengthA-130 | 35
Fit length (mm)C11
Inside diameter possible from Ø to Ø H7 (mm)
D1/23-8
Outside diameter (mm)B19
Moment of inertia (gcm2)Jges.8,5 | 9,5
Torsional stiffness (10³ Nm/rad)CT750 | 700
Fastening screw ISO 4762EM2,5
Tightening torque of the fastening screw (Nm)E0,85
Distance between centerlines (mm)F6
Distance (mm)G3,5
Approximate weight (g)22 | 24
Axial (mm)max.0,5 | 0,7
Lateral (mm)max.0,15 | 0,2
Angular (degree)max.1,5 | 1,5
15
CAD
MK2 Series
Rated torque (Nm)TKN
Overall lengthA-1
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/2
Outside diameter (mm)B
Moment of inertia (gcm2)Jges.
Torsional stiffness (10³ Nm/rad)CT
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Approximate weight (g)
Axial (mm)max.
Lateral (mm)max.
Angular (degree)max.
CAD Portal
MK2 Serien20
Rated torque (Nm)TKN2
Overall lengthA-135 | 40 | 44
Fit length (mm)C13
Inside diameter possible from Ø to Ø H7 (mm)
D1/23-12,7
Outside diameter (mm)B25
Moment of inertia (gcm2)Jges.25 | 27 | 29
Torsional stiffness (10³ Nm/rad)CT1200 | 1300 | 1200
Fastening screw ISO 4762EM3
Tightening torque of the fastening screw (Nm)E2,3
Distance between centerlines (mm)F8
Distance (mm)G4
Approximate weight (g)36 | 38 | 40
Axial (mm)max.0,5 | 0,6 | 0,7
Lateral (mm)max.0,15 | 0,2 | 0,25
Angular (degree)max.1,5 | 1,5 | 2
20
CAD
MK2 Series
Rated torque (Nm)TKN
Overall lengthA-1
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/2
Outside diameter (mm)B
Moment of inertia (gcm2)Jges.
Torsional stiffness (10³ Nm/rad)CT
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Approximate weight (g)
Axial (mm)max.
Lateral (mm)max.
Angular (degree)max.
CAD Portal
MK2 Serien45
Rated torque (Nm)TKN4,5
Overall lengthA-146 | 54
Fit length (mm)C16
Inside diameter possible from Ø to Ø H7 (mm)
D1/25-16
Outside diameter (mm)B32
Moment of inertia (gcm2)Jges.100 | 108
Torsional stiffness (10³ Nm/rad)CT7000 | 5000
Fastening screw ISO 4762EM4
Tightening torque of the fastening screw (Nm)E4
Distance between centerlines (mm)F10
Distance (mm)G5
Approximate weight (g)74 | 78
Axial (mm)max.0,7 | 1
Lateral (mm)max.0,2 | 0,25
Angular (degree)max.1,5 | 2
45
CAD
MK2 Series
Rated torque (Nm)TKN
Overall lengthA-1
Fit length (mm)C
Inside diameter possible from Ø to Ø H7 (mm)
D1/2
Outside diameter (mm)B
Moment of inertia (gcm2)Jges.
Torsional stiffness (10³ Nm/rad)CT
Fastening screw ISO 4762E
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Approximate weight (g)
Axial (mm)max.
Lateral (mm)max.
Angular (degree)max.
CAD Portal
MK2 Serien100
Rated torque (Nm)TKN10
Overall lengthA-150 | 60
Fit length (mm)C16
Inside diameter possible from Ø to Ø H7 (mm)
D1/25-24
Outside diameter (mm)B40
Moment of inertia (gcm2)Jges.160 | 205
Torsional stiffness (10³ Nm/rad)CT9050 | 8800
Fastening screw ISO 4762EM4
Tightening torque of the fastening screw (Nm)E4,5
Distance between centerlines (mm)F15
Distance (mm)G5
Approximate weight (g)120 | 130
Axial (mm)max.1 | 1,2
Lateral (mm)max.0,2 | 0,3
Angular (degree)max.1,5 | 2
100
CAD

Properties

  • Design:
    • standard: With a single radial clamping screw per hub ISO 4762
    • option (MKH): Both clamping hubs completely removable
  • Temperature range: -30°C to +110°C (-22° F to +230° F)
  • Tolerance: On the hub/shaft connection 0.01 to 0.05 mm.
  • Service life: These couplings have an infinite life, and are maintenance-free if the technical ratings are not exceeded.
  • Material:
    • bellows are made of highly flexible high-grade stainless steel
    • 
hubs from aluminium.
  • Speeds: Up to 10,000 rpm, in excess of 10,000 rpm available with balanced version.
  • Non-standard application: Custom designs with varied tolerances, keyways, non-standard material and bellows are available upon request.
  • Properties of Miniature Coupling model MK2:
    • backlash-free and torsionally rigid
    • compensates for 3-axis of misalignment
    • frictional connection utilizing clamping hubs
    • for high dynamic applications
    • low moment of inertia


Overview