MK4
Miniature Bellows Coupling with radial set screws and press-fit connection

0.5 - 10 Nm

MK4 MINIATURE BELLOWS COUPLING WITH RADIAL SET SCREWS AND PRESS-FIT CONNECTION

  • MK4
  • Specifications MK4

    MK4 Series
    Rated torque (Nm)TKN
    Overall length (inserted) (mm)A+0,2
    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 (gcm2)Jges.
    Torsional stiffness (Nm/rad)CT
    Tightening torque of the fastening screw (Nm)E
    Distance (mm)G
    Mounting length (mm)C1
    Mounting length (mm)C2
    Preload compression (mm)H
    Set screws ISO 4029E
    Lateral (mm)max.
    Angular (degree)max.
    Axial recovery force at max. preload compression (N)
    Axial* (mm)max.
    CAD Portal
    MK4 Serien5
    Rated torque (Nm)TKN0,5
    Overall length (inserted) (mm)A+0,222 | 25 | 28
    Inside diameter possible from Ø to Ø H7 (mm)
    D13-9
    Inside diameter possible from Ø to Ø H7 (mm)
    D23-6,35
    Outside diameter (mm)B15
    Moment of inertia (gcm2)Jges.2,0 | 2,2 | 2,5
    Torsional stiffness (Nm/rad)CT280 | 210 | 170
    Tightening torque of the fastening screw (Nm)E1,3
    Distance (mm)G2
    Mounting length (mm)C16,5
    Mounting length (mm)C29
    Preload compression (mm)H0,4
    Set screws ISO 4029E1x M3
    Lateral (mm)max.0,15 | 0,2 | 0,25
    Angular (degree)max.1 | 1,5 | 2
    Axial recovery force at max. preload compression (N)5 | 3 | 2
    Axial* (mm)max.0,4 | 0,5 | 0,6
    5
    CAD
    MK4 Series
    Rated torque (Nm)TKN
    Overall length (inserted) (mm)A+0,2
    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 (gcm2)Jges.
    Torsional stiffness (Nm/rad)CT
    Tightening torque of the fastening screw (Nm)E
    Distance (mm)G
    Mounting length (mm)C1
    Mounting length (mm)C2
    Preload compression (mm)H
    Set screws ISO 4029E
    Lateral (mm)max.
    Angular (degree)max.
    Axial recovery force at max. preload compression (N)
    Axial* (mm)max.
    CAD Portal
    MK4 Serien15
    Rated torque (Nm)TKN1,5
    Overall length (inserted) (mm)A+0,226 | 31
    Inside diameter possible from Ø to Ø H7 (mm)
    D13-12
    Inside diameter possible from Ø to Ø H7 (mm)
    D23-9
    Outside diameter (mm)B19
    Moment of inertia (gcm2)Jges.5,5 | 6,0
    Torsional stiffness (Nm/rad)CT750 | 700
    Tightening torque of the fastening screw (Nm)E1,3
    Distance (mm)G2
    Mounting length (mm)C17,5
    Mounting length (mm)C210
    Preload compression (mm)H0,5
    Set screws ISO 4029E2x M3
    Lateral (mm)max.0,15 | 0,2
    Angular (degree)max.1,5 | 1,5
    Axial recovery force at max. preload compression (N)4 | 3
    Axial* (mm)max.0,5 | 0,7
    15
    CAD
    MK4 Series
    Rated torque (Nm)TKN
    Overall length (inserted) (mm)A+0,2
    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 (gcm2)Jges.
    Torsional stiffness (Nm/rad)CT
    Tightening torque of the fastening screw (Nm)E
    Distance (mm)G
    Mounting length (mm)C1
    Mounting length (mm)C2
    Preload compression (mm)H
    Set screws ISO 4029E
    Lateral (mm)max.
    Angular (degree)max.
    Axial recovery force at max. preload compression (N)
    Axial* (mm)max.
    CAD Portal
    MK4 Serien20
    Rated torque (Nm)TKN2
    Overall length (inserted) (mm)A+0,228 | 33 | 37
    Inside diameter possible from Ø to Ø H7 (mm)
    D13-16
    Inside diameter possible from Ø to Ø H7 (mm)
    D23-12,7
    Outside diameter (mm)B25
    Moment of inertia (gcm2)Jges.21 | 23 | 25
    Torsional stiffness (Nm/rad)CT1200 | 1300 | 1200
    Tightening torque of the fastening screw (Nm)E2,5
    Distance (mm)G2,5
    Mounting length (mm)C111
    Mounting length (mm)C211
    Preload compression (mm)H0,5
    Set screws ISO 4029E2x M4
    Lateral (mm)max.0,15 | 0,2 | 0,25
    Angular (degree)max.1,5 | 1,5 | 2
    Axial recovery force at max. preload compression (N)3 | 4 | 3
    Axial* (mm)max.0,5 | 0,6 | 0,7
    20
    CAD
    MK4 Series
    Rated torque (Nm)TKN
    Overall length (inserted) (mm)A+0,2
    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 (gcm2)Jges.
    Torsional stiffness (Nm/rad)CT
    Tightening torque of the fastening screw (Nm)E
    Distance (mm)G
    Mounting length (mm)C1
    Mounting length (mm)C2
    Preload compression (mm)H
    Set screws ISO 4029E
    Lateral (mm)max.
    Angular (degree)max.
    Axial recovery force at max. preload compression (N)
    Axial* (mm)max.
    CAD Portal
    MK4 Serien45
    Rated torque (Nm)TKN4,5
    Overall length (inserted) (mm)A+0,239 | 47
    Inside diameter possible from Ø to Ø H7 (mm)
    D16-22
    Inside diameter possible from Ø to Ø H7 (mm)
    D26-16
    Outside diameter (mm)B32
    Moment of inertia (gcm2)Jges.80 | 85
    Torsional stiffness (Nm/rad)CT7000 | 5000
    Tightening torque of the fastening screw (Nm)E4
    Distance (mm)G3,5
    Mounting length (mm)C113
    Mounting length (mm)C214
    Preload compression (mm)H0,7
    Set screws ISO 4029E2x M5
    Lateral (mm)max.0,2 | 0,25
    Angular (degree)max.1,5 | 2
    Axial recovery force at max. preload compression (N)15 | 10
    Axial* (mm)max.0,7 | 1
    45
    CAD
    MK4 Series
    Rated torque (Nm)TKN
    Overall length (inserted) (mm)A+0,2
    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 (gcm2)Jges.
    Torsional stiffness (Nm/rad)CT
    Tightening torque of the fastening screw (Nm)E
    Distance (mm)G
    Mounting length (mm)C1
    Mounting length (mm)C2
    Preload compression (mm)H
    Set screws ISO 4029E
    Lateral (mm)max.
    Angular (degree)max.
    Axial recovery force at max. preload compression (N)
    Axial* (mm)max.
    CAD Portal
    MK4 Serien100
    Rated torque (Nm)TKN10
    Overall length (inserted) (mm)A+0,246 | 56
    Inside diameter possible from Ø to Ø H7 (mm)
    D16-28
    Inside diameter possible from Ø to Ø H7 (mm)
    D26-20
    Outside diameter (mm)B40
    Moment of inertia (gcm2)Jges.200 | 210
    Torsional stiffness (Nm/rad)CT9050 | 8800
    Tightening torque of the fastening screw (Nm)E6
    Distance (mm)G4
    Mounting length (mm)C115
    Mounting length (mm)C216
    Preload compression (mm)H1
    Set screws ISO 4029E2x M6
    Lateral (mm)max.0,2 | 0,3
    Angular (degree)max.1,5 | 2
    Axial recovery force at max. preload compression (N)25 | 30
    Axial* (mm)max.1 | 1,2
    100
    CAD

    Properties

    • Design:
      • both hubs have radial set screws and integral dismounting grooves.
      • 
incorporates a blind mate press-fit connection.
    • Temperature range: -30° to +110°C (-22° F to +230° F)
    • Tolerance: On the hub/shaft connection 0.01 to 0.08 mm.
    • Service life: These couplings have an infinite life, and are maintenance-free if the technical ratings are not exceeded.
    • Material:
      • bellows made of highly flexible high-grade stainless steel
      • 
clamping hubs and tapered female segment on bellows face from aluminium
      • tapered segment on the hub face: glass-fiber reinforced plastic deposited onto an aluminium hub
    • Speeds: Up to 20,000 rpm, in excess of 20,000 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 MK4:
      • Absolutely backlash-free and torsionally rigid
      • compensates for 3-axis of misalignment
      • easy mounting and dismounting
      • electrically insulated
      • no wear
      • low moment of inertia


    Overview