MK3
Miniature Bellows Coupling with expanding shaft

0.5 - 10 Nm

MK3 MINIATURE BELLOWS COUPLING WITH EXPANDING SHAFT

MK3

Specifications MK3

MK3 Series
Rated torque (Nm)TKN
Inside diameter possible from Ø to Ø H7 (mm)D1
Outside diameter (mm)B
Moment of inertia (gcm2)Jges.
Torsional stiffness (Nm/rad)CT
Fastening screw ISO 4762E
Fastening screw ISO 4762I
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Mounting length (mm)C1
Fit length (mm)C2
Shaft diameter from Ø to Ø h7 (mm)D2
Axial (mm)max.
Lateral (mm)max.
Angular (degree)max.
Overall length (mm)A-1
CAD Portal
MK3 Serien5
Rated torque (Nm)TKN0,5
Inside diameter possible from Ø to Ø H7 (mm)
D13-7
Outside diameter (mm)B15
Moment of inertia (gcm2)Jges.2,6 | 2,8 | 3,0
Torsional stiffness (Nm/rad)CT280 | 210 | 170
Fastening screw ISO 4762EM2
Fastening screw ISO 4762IM3
Tightening torque of the fastening screw (Nm)E0,43
Distance between centerlines (mm)F4,5
Distance (mm)G3
Mounting length (mm)C19
Fit length (mm)C210
Shaft diameter from Ø to Ø h7 (mm)D28-10
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
Overall length (mm)A-120 | 23 | 26
5
CAD
MK3 Series
Rated torque (Nm)TKN
Inside diameter possible from Ø to Ø H7 (mm)D1
Outside diameter (mm)B
Moment of inertia (gcm2)Jges.
Torsional stiffness (Nm/rad)CT
Fastening screw ISO 4762E
Fastening screw ISO 4762I
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Mounting length (mm)C1
Fit length (mm)C2
Shaft diameter from Ø to Ø h7 (mm)D2
Axial (mm)max.
Lateral (mm)max.
Angular (degree)max.
Overall length (mm)A-1
CAD Portal
MK3 Serien10
Rated torque (Nm)TKN1
Inside diameter possible from Ø to Ø H7 (mm)
D13-7
Outside diameter (mm)B15
Moment of inertia (gcm2)Jges.3,0 | 3,4 | 3,6
Torsional stiffness (Nm/rad)CT510 | 380 | 320
Fastening screw ISO 4762EM2
Fastening screw ISO 4762IM3
Tightening torque of the fastening screw (Nm)E0,43
Distance between centerlines (mm)F4,5
Distance (mm)G3
Mounting length (mm)C19
Fit length (mm)C210
Shaft diameter from Ø to Ø h7 (mm)D28-10
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
Overall length (mm)A-122 | 25 | 28
10
CAD
MK3 Series
Rated torque (Nm)TKN
Inside diameter possible from Ø to Ø H7 (mm)D1
Outside diameter (mm)B
Moment of inertia (gcm2)Jges.
Torsional stiffness (Nm/rad)CT
Fastening screw ISO 4762E
Fastening screw ISO 4762I
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Mounting length (mm)C1
Fit length (mm)C2
Shaft diameter from Ø to Ø h7 (mm)D2
Axial (mm)max.
Lateral (mm)max.
Angular (degree)max.
Overall length (mm)A-1
CAD Portal
MK3 Serien15
Rated torque (Nm)TKN1,5
Inside diameter possible from Ø to Ø H7 (mm)
D14-8
Outside diameter (mm)B19
Moment of inertia (gcm2)Jges.8,5 | 9,5
Torsional stiffness (Nm/rad)CT750 | 700
Fastening screw ISO 4762EM2,5
Fastening screw ISO 4762IM4
Tightening torque of the fastening screw (Nm)E0,85
Distance between centerlines (mm)F6
Distance (mm)G3,5
Mounting length (mm)C111
Fit length (mm)C212
Shaft diameter from Ø to Ø h7 (mm)D210-14
Axial (mm)max.0,5 | 0,7
Lateral (mm)max.0,15 | 0,2
Angular (degree)max.1,5 | 1,5
Overall length (mm)A-124 | 30
15
CAD
MK3 Series
Rated torque (Nm)TKN
Inside diameter possible from Ø to Ø H7 (mm)D1
Outside diameter (mm)B
Moment of inertia (gcm2)Jges.
Torsional stiffness (Nm/rad)CT
Fastening screw ISO 4762E
Fastening screw ISO 4762I
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Mounting length (mm)C1
Fit length (mm)C2
Shaft diameter from Ø to Ø h7 (mm)D2
Axial (mm)max.
Lateral (mm)max.
Angular (degree)max.
Overall length (mm)A-1
CAD Portal
MK3 Serien20
Rated torque (Nm)TKN2
Inside diameter possible from Ø to Ø H7 (mm)
D14-12,7
Outside diameter (mm)B25
Moment of inertia (gcm2)Jges.25 | 27 | 29
Torsional stiffness (Nm/rad)CT1200 | 1300 | 1200
Fastening screw ISO 4762EM3
Fastening screw ISO 4762IM4
Tightening torque of the fastening screw (Nm)E2,3
Distance between centerlines (mm)F8
Distance (mm)G4
Mounting length (mm)C113
Fit length (mm)C212
Shaft diameter from Ø to Ø h7 (mm)D28-16
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
Overall length (mm)A-127 | 33 | 36
20
CAD
MK3 Series
Rated torque (Nm)TKN
Inside diameter possible from Ø to Ø H7 (mm)D1
Outside diameter (mm)B
Moment of inertia (gcm2)Jges.
Torsional stiffness (Nm/rad)CT
Fastening screw ISO 4762E
Fastening screw ISO 4762I
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Mounting length (mm)C1
Fit length (mm)C2
Shaft diameter from Ø to Ø h7 (mm)D2
Axial (mm)max.
Lateral (mm)max.
Angular (degree)max.
Overall length (mm)A-1
CAD Portal
MK3 Serien45
Rated torque (Nm)TKN4,5
Inside diameter possible from Ø to Ø H7 (mm)
D15-16
Outside diameter (mm)B32
Moment of inertia (gcm2)Jges.100 | 108
Torsional stiffness (Nm/rad)CT7000 | 5000
Fastening screw ISO 4762EM4
Fastening screw ISO 4762IM5
Tightening torque of the fastening screw (Nm)E4
Distance between centerlines (mm)F10
Distance (mm)G5
Mounting length (mm)C116
Fit length (mm)C215
Shaft diameter from Ø to Ø h7 (mm)D214-20
Axial (mm)max.0,7 | 1
Lateral (mm)max.0,2 | 0,25
Angular (degree)max.1,5 | 2
Overall length (mm)A-136 | 44
45
CAD
MK3 Series
Rated torque (Nm)TKN
Inside diameter possible from Ø to Ø H7 (mm)D1
Outside diameter (mm)B
Moment of inertia (gcm2)Jges.
Torsional stiffness (Nm/rad)CT
Fastening screw ISO 4762E
Fastening screw ISO 4762I
Tightening torque of the fastening screw (Nm)E
Distance between centerlines (mm)F
Distance (mm)G
Mounting length (mm)C1
Fit length (mm)C2
Shaft diameter from Ø to Ø h7 (mm)D2
Axial (mm)max.
Lateral (mm)max.
Angular (degree)max.
Overall length (mm)A-1
CAD Portal
MK3 Serien100
Rated torque (Nm)TKN10
Inside diameter possible from Ø to Ø H7 (mm)
D16-24
Outside diameter (mm)B40
Moment of inertia (gcm2)Jges.160 | 205
Torsional stiffness (Nm/rad)CT9050 | 8800
Fastening screw ISO 4762EM4
Fastening screw ISO 4762IM6
Tightening torque of the fastening screw (Nm)E4,5
Distance between centerlines (mm)F15
Distance (mm)G5
Mounting length (mm)C116
Fit length (mm)C220
Shaft diameter from Ø to Ø h7 (mm)D216-24
Axial (mm)max.1 | 1,2
Lateral (mm)max.0,2 | 0,3
Angular (degree)max.1,5 | 2
Overall length (mm)A-141 | 51
100
CAD

Properties

  • Design:
    • on one side with a single radial clamping screw ISO 4762
    • on one side an expanding shaft with tapered clamping element.
  • 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
    • clamping hub aluminium
    • expanding hub and cone (steel)
  • 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 MK3:
    • backlash-free and torsionally rigid
    • compensates for 3-axis of misalignment
    • easy mounting
    • compact design, conserves space while saving cost
    • low moment of inertia


Overview