MK2
Miniature Bellows Coupling with clamping hub

0.5 - 10 Nm

MK2 MINIATURE BELLOWS COUPLING WITH CLAMPING HUB

Specifications MK2

MK2 series 5 10 15 20 45 100
Rated torque (Nm) TKN 0.5 1.0 1.5 2.0 4.5 10
Overall length (mm) A
252831
273033
3035
354044
4654
5060
Outside diameter (mm) B 15 15 19 25 32 40
Fit length (mm) C 9 9 11 13 16 16
Inside diameter possible
from Ø to Ø H7 (mm)
D1/2
3-7 3-7 3-8 3-12.7 5-16 5-24
Inside diameter possible
from Ø to Ø H7 (inch)
D1/2
0,125"-
0,250"
0,125"-
0,250"
0,125"-
0,313"
0,125"-
0,500"
0,250"-
0,625"
0,250"-
0,875"
Fastening screw ISO 4762 E M2 M2 M2.5 M3 M4 M4
Tightening torque of the
fastening screws(Nm)
E
0.43 0.43 0.85 2.3 4 4.5
Distance between centerlines (mm) F 4.5 4.5 6 8 10 15
Distance (mm) G 3 3 3.5 4 5 5
Moment of inertia (gcm2) Jges
2.62.83
33.43.6
8.59.5
252729
100108
160205
Weight (g)9
91011
2224
363840
7478
120130
Torsional stiffness (Nm/rad) CT
280210170
510380320
750700
120013001200
70005000
90508800
axial (mm) max.
0.40.50.6
0.40.50.6
0.50.7
0.50.60.7
0.71
11.2
lateral (mm) max.
0.150.20.25
0.150.20.25
0.150.2
0.150.20.25
0.20.25
0.20.3
angular (degrees) max.
11.52
11.52
1.5
1.51.52
1.52
1.52
CAD Portal 5 10 15 20 45 100
2D/3D Data 

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