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MK4 | Miniature Coupling

With Press-Fit Connection

The MK4 is designed so that both hubs have radial set screws and integral dismounting grooves. 
This coupling incorporates a blind mate press-fit connection.
It has an operating temperature range of -30 degrees to 110 °C (-22 to 230 °F) and a standard speed rating of 20,000 RPM. Speeds in excess of 20,000 RPM are available with a specially balanced version.
This is a backlash free, electrically insulated, torsionally rigid solution that is easily mounted with 3-axis of misalignment compensation.
These couplings have an infinite life, and are maintenance-free if the technical ratings are not exceeded. The bellows are made of highly flexible high-grade stainless steel. The clamping hubs and tapered female segment on the bellows face are made of aluminum and the tapered segment on the hub face is a wear-free glass-fiber reinforced plastic.
*Non-standard application: Custom designs with varied tolerances, key-ways, non-standard material and bellows are available upon request.

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

0.5 - 10 NM

MK4 Diagram

MK4 Series Variants

*See above picture for reference

ItemTorque(Nm)LengthO.D. BMountLength (mm)MountLength (mm)I.D. H7(mm)I.D. (mm)MomentInertia 10-3TorsionStiffnessFastenerTorque (Screw)Distance (mm)PreLoadAxial(mm)Axial Rec ForceLateral(mm)Angular(deg)
MK4-50,522 | 25 | 28156,593-93-6,352,0 | 2,2 | 2,5280 | 210 | 1701x M31,320,40,4 | 0,5 | 0,65 | 3 | 20,15 | 0,2 | 0,251 | 1,5 | 2

MK4-151,526 | 31197,5103-123-95,5 | 6,0750 | 7002x M31,320,50,5 | 0,74 | 30,15 | 0,21,5 | 1,5

MK4-20228 | 33 | 372511113-163-12,721 | 23 | 251200 | 1300 | 12002x M42,52,50,50,5 | 0,6 | 0,73 | 4 | 30,15 | 0,2 | 0,251,5 | 1,5 | 2

MK4-454,539 | 473213146-226-1680 | 857000 | 50002x M543,50,70,7 | 115 | 100,2 | 0,251,5 | 2

MK4-1001046 | 564015166-286-20200 | 2109050 | 88002x M66411 | 1,225 | 300,2 | 0,31,5 | 2



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