Products

Metal bellows couplings
MK

These torsionally stiff couplings serve for the connection of two shaft ends compensating for angular and parallel misanlignment as well as axial backlash. They are used for the backlash-free and precise angular drive of:
-potentiometers / angle encoders
-resolvers / transducers
-low powered drives
The mounting of the coupling onto the shaft ends is achieved by two set screws each with one cup point per hub. In the case of a smaller than indicated size of bore, an accurate transmission or peak-torque is no longer guaranteed. Larger borings can be supplied on request.

Technical facts

Type - MK	4	8	15	30	45	90	130
Nennmoment (Nm)	0,4	0,8	1,5	3	4,5	9	13
Torsionssteife (Nm/rad)	190	390	600	1220	2590	5210	5210
Federsteife lateral (N/mm) axial (N/mm)	18	31	16	26	17	29	29
Federsteife lateral (N/mm) axial (N/mm)	10	21	7,5	16	8	17	17
max. Wellenersatz lateral (mm) axial (mm)	+/-0,1	+/-0,1	+/-0,15	+/-0,15	+/-0,2	+/-0,25	+/-0,25
max. Wellenersatz lateral (mm) axial (mm)	+/-0,3	+/-0,3	+/-0,5	+/-0,5	+/-0,7	+/-0,7	+/-0,7
Trägheitsmoment 10 ^-6 (kgm ²)	0,35	0,4	4,5	5	16	20	25
Masse ca. (kg)	14	15	70	70	86	100	110
Gewindestift 4xDIN 916	M3	M3	M6	M6	M8	M8	M8

The size of the coupling should be selected so that the nominal torque is greater than the highest torque to be regularly transmitted. (Acceleration or load torque). The shaft misalignments must not exceed the previously mentioned values. Otherwise this will limit the working life of the coupling.

hub material:
brass MK 4, 8, 15, 30
aluminium alloy MK 45, 90, 130
bellows material: high-grade steel

The shaft borings are finished to customer’s specifications. Please quote them.

MK-4

Nenndrehmoment 0,4 Nm